Ben Hutchings [Wed, 30 Apr 2014 15:23:28 +0000 (16:23 +0100)]
Linux 3.2.58
Ben Hutchings [Wed, 30 Apr 2014 12:22:22 +0000 (13:22 +0100)]
Revert "isci: fix reset timeout handling"
This reverts commit
584ec12265192bf49dfa270d517380f6723a6956, which
was commit
ddfadd7736b677de2d4ca2cd5b4b655368c85a7a upstream. It
causes boot failure on 3.2 although no such problem occurs upstream.
Reported-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Acked-by: Dan Williams <dan.j.williams@intel.com>
Ben Hutchings [Mon, 28 Apr 2014 01:04:30 +0000 (02:04 +0100)]
Revert "alpha: fix broken network checksum"
This reverts commit
b93b90ff7c50288d602108ae1a09673df3f799a8, which
was commit
0ef38d70d4118b2ce1a538d14357be5ff9dc2bbd upstream.
It was intended to fix a regression which never occurred in 3.2.
Mikulas Patocka [Thu, 12 Dec 2013 00:39:19 +0000 (19:39 -0500)]
powernow-k6: reorder frequencies
commit
22c73795b101597051924556dce019385a1e2fa0 upstream.
This patch reorders reported frequencies from the highest to the lowest,
just like in other frequency drivers.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
[bwh: Backported to 3.2: cpu_frequency_table::driver_data is called index]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Mikulas Patocka [Thu, 12 Dec 2013 00:38:53 +0000 (19:38 -0500)]
powernow-k6: correctly initialize default parameters
commit
d82b922a4acc1781d368aceac2f9da43b038cab2 upstream.
The powernow-k6 driver used to read the initial multiplier from the
powernow register. However, there is a problem with this:
* If there was a frequency transition before, the multiplier read from the
register corresponds to the current multiplier.
* If there was no frequency transition since reset, the field in the
register always reads as zero, regardless of the current multiplier that
is set using switches on the mainboard and that the CPU is running at.
The zero value corresponds to multiplier 4.5, so as a consequence, the
powernow-k6 driver always assumes multiplier 4.5.
For example, if we have 550MHz CPU with bus frequency 100MHz and
multiplier 5.5, the powernow-k6 driver thinks that the multiplier is 4.5
and bus frequency is 122MHz. The powernow-k6 driver then sets the
multiplier to 4.5, underclocking the CPU to 450MHz, but reports the
current frequency as 550MHz.
There is no reliable way how to read the initial multiplier. I modified
the driver so that it contains a table of known frequencies (based on
parameters of existing CPUs and some common overclocking schemes) and sets
the multiplier according to the frequency. If the frequency is unknown
(because of unusual overclocking or underclocking), the user must supply
the bus speed and maximum multiplier as module parameters.
This patch should be backported to all stable kernels. If it doesn't
apply cleanly, change it, or ask me to change it.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
[bwh: Backported to 3.2:
- Adjust context
- s/driver_data/index/]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Mikulas Patocka [Thu, 12 Dec 2013 00:38:32 +0000 (19:38 -0500)]
powernow-k6: disable cache when changing frequency
commit
e20e1d0ac02308e2211306fc67abcd0b2668fb8b upstream.
I found out that a system with k6-3+ processor is unstable during network
server load. The system locks up or the network card stops receiving. The
reason for the instability is the CPU frequency scaling.
During frequency transition the processor is in "EPM Stop Grant" state.
The documentation says that the processor doesn't respond to inquiry
requests in this state. Consequently, coherency of processor caches and
bus master devices is not maintained, causing the system instability.
This patch flushes the cache during frequency transition. It fixes the
instability.
Other minor changes:
* u64 invalue changed to unsigned long because the variable is 32-bit
* move the logic to set the multiplier to a separate function
powernow_k6_set_cpu_multiplier
* preserve lower 5 bits of the powernow port instead of 4 (the voltage
field has 5 bits)
* mask interrupts when reading the multiplier, so that the port is not
open during other activity (running other kernel code with the port open
shouldn't cause any misbehavior, but we should better be safe and keep
the port closed)
This patch should be backported to all stable kernels. If it doesn't
apply cleanly, change it, or ask me to change it.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Paul Moore [Wed, 19 Mar 2014 20:46:18 +0000 (16:46 -0400)]
selinux: correctly label /proc inodes in use before the policy is loaded
commit
f64410ec665479d7b4b77b7519e814253ed0f686 upstream.
This patch is based on an earlier patch by Eric Paris, he describes
the problem below:
"If an inode is accessed before policy load it will get placed on a
list of inodes to be initialized after policy load. After policy
load we call inode_doinit() which calls inode_doinit_with_dentry()
on all inodes accessed before policy load. In the case of inodes
in procfs that means we'll end up at the bottom where it does:
/* Default to the fs superblock SID. */
isec->sid = sbsec->sid;
if ((sbsec->flags & SE_SBPROC) && !S_ISLNK(inode->i_mode)) {
if (opt_dentry) {
isec->sclass = inode_mode_to_security_class(...)
rc = selinux_proc_get_sid(opt_dentry,
isec->sclass,
&sid);
if (rc)
goto out_unlock;
isec->sid = sid;
}
}
Since opt_dentry is null, we'll never call selinux_proc_get_sid()
and will leave the inode labeled with the label on the superblock.
I believe a fix would be to mimic the behavior of xattrs. Look
for an alias of the inode. If it can't be found, just leave the
inode uninitialized (and pick it up later) if it can be found, we
should be able to call selinux_proc_get_sid() ..."
On a system exhibiting this problem, you will notice a lot of files in
/proc with the generic "proc_t" type (at least the ones that were
accessed early in the boot), for example:
# ls -Z /proc/sys/kernel/shmmax | awk '{ print $4 " " $5 }'
system_u:object_r:proc_t:s0 /proc/sys/kernel/shmmax
However, with this patch in place we see the expected result:
# ls -Z /proc/sys/kernel/shmmax | awk '{ print $4 " " $5 }'
system_u:object_r:sysctl_kernel_t:s0 /proc/sys/kernel/shmmax
Cc: Eric Paris <eparis@redhat.com>
Signed-off-by: Paul Moore <pmoore@redhat.com>
Acked-by: Eric Paris <eparis@redhat.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Jiri Slaby [Mon, 14 Apr 2014 14:46:50 +0000 (09:46 -0500)]
Char: ipmi_bt_sm, fix infinite loop
commit
a94cdd1f4d30f12904ab528152731fb13a812a16 upstream.
In read_all_bytes, we do
unsigned char i;
...
bt->read_data[0] = BMC2HOST;
bt->read_count = bt->read_data[0];
...
for (i = 1; i <= bt->read_count; i++)
bt->read_data[i] = BMC2HOST;
If bt->read_data[0] == bt->read_count == 255, we loop infinitely in the
'for' loop. Make 'i' an 'int' instead of 'char' to get rid of the
overflow and finish the loop after 255 iterations every time.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Reported-and-debugged-by: Rui Hui Dian <rhdian@novell.com>
Cc: Tomas Cech <tcech@suse.cz>
Cc: Corey Minyard <minyard@acm.org>
Cc: <openipmi-developer@lists.sourceforge.net>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Qiang Huang [Fri, 18 Apr 2014 09:29:24 +0000 (17:29 +0800)]
drivers: hv: additional switch to use mb() instead of smp_mb()
commit
e4af376d04b0(drivers: hv: switch to use mb() instead of smp_mb()),
the adjustment mistakenly dropped the change in hv_ringbuffer_read,
so add it.
Signed-off-by: Qiang Huang <h.huangqiang@huawei.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Andy Grover [Fri, 4 Apr 2014 23:44:37 +0000 (16:44 -0700)]
target/tcm_fc: Fix use-after-free of ft_tpg
commit
2c42be2dd4f6586728dba5c4e197afd5cfaded78 upstream.
ft_del_tpg checks tpg->tport is set before unlinking the tpg from the
tport when the tpg is being removed. Set this pointer in ft_tport_create,
or the unlinking won't happen in ft_del_tpg and tport->tpg will reference
a deleted object.
This patch sets tpg->tport in ft_tport_create, because that's what
ft_del_tpg checks, and is the only way to get back to the tport to
clear tport->tpg.
The bug was occuring when:
- lport created, tport (our per-lport, per-provider context) is
allocated.
tport->tpg = NULL
- tpg created
- a PRLI is received. ft_tport_create is called, tpg is found and
tport->tpg is set
- tpg removed. ft_tpg is freed in ft_del_tpg. Since tpg->tport was not
set, tport->tpg is not cleared and points at freed memory
- Future calls to ft_tport_create return tport via first conditional,
instead of searching for new tpg by calling ft_lport_find_tpg.
tport->tpg is still invalid, and will access freed memory.
see https://bugzilla.redhat.com/show_bug.cgi?id=
1071340
Signed-off-by: Andy Grover <agrover@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
H. Peter Anvin [Sun, 16 Mar 2014 22:31:54 +0000 (15:31 -0700)]
x86-64, modify_ldt: Ban 16-bit segments on 64-bit kernels
commit
b3b42ac2cbae1f3cecbb6229964a4d48af31d382 upstream.
The IRET instruction, when returning to a 16-bit segment, only
restores the bottom 16 bits of the user space stack pointer. We have
a software workaround for that ("espfix") for the 32-bit kernel, but
it relies on a nonzero stack segment base which is not available in
32-bit mode.
Since 16-bit support is somewhat crippled anyway on a 64-bit kernel
(no V86 mode), and most (if not quite all) 64-bit processors support
virtualization for the users who really need it, simply reject
attempts at creating a 16-bit segment when running on top of a 64-bit
kernel.
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Link: http://lkml.kernel.org/n/tip-kicdm89kzw9lldryb1br9od0@git.kernel.org
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Rafał Miłecki [Sat, 5 Apr 2014 16:08:25 +0000 (18:08 +0200)]
b43: Fix machine check error due to improper access of B43_MMIO_PSM_PHY_HDR
commit
12cd43c6ed6da7bf7c5afbd74da6959cda6d056b upstream.
Register B43_MMIO_PSM_PHY_HDR is 16 bit one, so accessing it with 32b
functions isn't safe. On my machine it causes delayed (!) CPU exception:
Disabling lock debugging due to kernel taint
mce: [Hardware Error]: CPU 0: Machine Check Exception: 4 Bank 4:
b200000000070f0f
mce: [Hardware Error]: TSC
164083803dc
mce: [Hardware Error]: PROCESSOR 2:20fc2 TIME
1396650505 SOCKET 0 APIC 0 microcode 0
mce: [Hardware Error]: Run the above through 'mcelog --ascii'
mce: [Hardware Error]: Machine check: Processor context corrupt
Kernel panic - not syncing: Fatal machine check on current CPU
Kernel Offset: 0x0 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffff9fffffff)
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Acked-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Jens Axboe [Tue, 8 Apr 2014 23:04:12 +0000 (16:04 -0700)]
lib/percpu_counter.c: fix bad percpu counter state during suspend
commit
e39435ce68bb4685288f78b1a7e24311f7ef939f upstream.
I got a bug report yesterday from Laszlo Ersek in which he states that
his kvm instance fails to suspend. Laszlo bisected it down to this
commit
1cf7e9c68fe8 ("virtio_blk: blk-mq support") where virtio-blk is
converted to use the blk-mq infrastructure.
After digging a bit, it became clear that the issue was with the queue
drain. blk-mq tracks queue usage in a percpu counter, which is
incremented on request alloc and decremented when the request is freed.
The initial hunt was for an inconsistency in blk-mq, but everything
seemed fine. In fact, the counter only returned crazy values when
suspend was in progress.
When a CPU is unplugged, the percpu counters merges that CPU state with
the general state. blk-mq takes care to register a hotcpu notifier with
the appropriate priority, so we know it runs after the percpu counter
notifier. However, the percpu counter notifier only merges the state
when the CPU is fully gone. This leaves a state transition where the
CPU going away is no longer in the online mask, yet it still holds
private values. This means that in this state, percpu_counter_sum()
returns invalid results, and the suspend then hangs waiting for
abs(dead-cpu-value) requests to complete which of course will never
happen.
Fix this by clearing the state earlier, so we never have a case where
the CPU isn't in online mask but still holds private state. This bug
has been there since forever, I guess we don't have a lot of users where
percpu counters needs to be reliable during the suspend cycle.
Signed-off-by: Jens Axboe <axboe@fb.com>
Reported-by: Laszlo Ersek <lersek@redhat.com>
Tested-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Takashi Iwai [Tue, 8 Apr 2014 14:58:34 +0000 (16:58 +0200)]
ALSA: ice1712: Fix boundary checks in PCM pointer ops
commit
4f8e940095536bc002a81666a4107a581c84e9b9 upstream.
PCM pointer callbacks in ice1712 driver check the buffer size boundary
wrongly between bytes and frames. This leads to PCM core warnings
like:
snd_pcm_update_hw_ptr0: 105 callbacks suppressed
ALSA pcm_lib.c:352 BUG: pcmC3D0c:0, pos = 5461, buffer size = 5461, period size = 2730
This patch fixes these checks to be placed after the proper unit
conversions.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Oleg Nesterov [Mon, 7 Apr 2014 22:38:41 +0000 (15:38 -0700)]
wait: fix reparent_leader() vs EXIT_DEAD->EXIT_ZOMBIE race
commit
dfccbb5e49a621c1b21a62527d61fc4305617aca upstream.
wait_task_zombie() first does EXIT_ZOMBIE->EXIT_DEAD transition and
drops tasklist_lock. If this task is not the natural child and it is
traced, we change its state back to EXIT_ZOMBIE for ->real_parent.
The last transition is racy, this is even documented in
50b8d257486a
"ptrace: partially fix the do_wait(WEXITED) vs EXIT_DEAD->EXIT_ZOMBIE
race". wait_consider_task() tries to detect this transition and clear
->notask_error but we can't rely on ptrace_reparented(), debugger can
exit and do ptrace_unlink() before its sub-thread sets EXIT_ZOMBIE.
And there is another problem which were missed before: this transition
can also race with reparent_leader() which doesn't reset >exit_signal if
EXIT_DEAD, assuming that this task must be reaped by someone else. So
the tracee can be re-parented with ->exit_signal != SIGCHLD, and if
/sbin/init doesn't use __WALL it becomes unreapable.
Change reparent_leader() to update ->exit_signal even if EXIT_DEAD.
Note: this is the simple temporary hack for -stable, it doesn't try to
solve all problems, it will be reverted by the next changes.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Reported-by: Jan Kratochvil <jan.kratochvil@redhat.com>
Reported-by: Michal Schmidt <mschmidt@redhat.com>
Tested-by: Michal Schmidt <mschmidt@redhat.com>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Cc: Lennart Poettering <lpoetter@redhat.com>
Cc: Roland McGrath <roland@hack.frob.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Mizuma, Masayoshi [Mon, 7 Apr 2014 22:37:54 +0000 (15:37 -0700)]
mm: hugetlb: fix softlockup when a large number of hugepages are freed.
commit
55f67141a8927b2be3e51840da37b8a2320143ed upstream.
When I decrease the value of nr_hugepage in procfs a lot, softlockup
happens. It is because there is no chance of context switch during this
process.
On the other hand, when I allocate a large number of hugepages, there is
some chance of context switch. Hence softlockup doesn't happen during
this process. So it's necessary to add the context switch in the
freeing process as same as allocating process to avoid softlockup.
When I freed 12 TB hugapages with kernel-2.6.32-358.el6, the freeing
process occupied a CPU over 150 seconds and following softlockup message
appeared twice or more.
$ echo
6000000 > /proc/sys/vm/nr_hugepages
$ cat /proc/sys/vm/nr_hugepages
6000000
$ grep ^Huge /proc/meminfo
HugePages_Total:
6000000
HugePages_Free:
6000000
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
$ echo 0 > /proc/sys/vm/nr_hugepages
BUG: soft lockup - CPU#16 stuck for 67s! [sh:12883] ...
Pid: 12883, comm: sh Not tainted 2.6.32-358.el6.x86_64 #1
Call Trace:
free_pool_huge_page+0xb8/0xd0
set_max_huge_pages+0x128/0x190
hugetlb_sysctl_handler_common+0x113/0x140
hugetlb_sysctl_handler+0x1e/0x20
proc_sys_call_handler+0x97/0xd0
proc_sys_write+0x14/0x20
vfs_write+0xb8/0x1a0
sys_write+0x51/0x90
__audit_syscall_exit+0x265/0x290
system_call_fastpath+0x16/0x1b
I have not confirmed this problem with upstream kernels because I am not
able to prepare the machine equipped with 12TB memory now. However I
confirmed that the amount of decreasing hugepages was directly
proportional to the amount of required time.
I measured required times on a smaller machine. It showed 130-145
hugepages decreased in a millisecond.
Amount of decreasing Required time Decreasing rate
hugepages (msec) (pages/msec)
------------------------------------------------------------
10,000 pages == 20GB 70 - 74 135-142
30,000 pages == 60GB 208 - 229 131-144
It means decrement of 6TB hugepages will trigger softlockup with the
default threshold 20sec, in this decreasing rate.
Signed-off-by: Masayoshi Mizuma <m.mizuma@jp.fujitsu.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Cc: Aneesh Kumar <aneesh.kumar@linux.vnet.ibm.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Vlastimil Babka [Mon, 7 Apr 2014 22:37:50 +0000 (15:37 -0700)]
mm: try_to_unmap_cluster() should lock_page() before mlocking
commit
57e68e9cd65b4b8eb4045a1e0d0746458502554c upstream.
A BUG_ON(!PageLocked) was triggered in mlock_vma_page() by Sasha Levin
fuzzing with trinity. The call site try_to_unmap_cluster() does not lock
the pages other than its check_page parameter (which is already locked).
The BUG_ON in mlock_vma_page() is not documented and its purpose is
somewhat unclear, but apparently it serializes against page migration,
which could otherwise fail to transfer the PG_mlocked flag. This would
not be fatal, as the page would be eventually encountered again, but
NR_MLOCK accounting would become distorted nevertheless. This patch adds
a comment to the BUG_ON in mlock_vma_page() and munlock_vma_page() to that
effect.
The call site try_to_unmap_cluster() is fixed so that for page !=
check_page, trylock_page() is attempted (to avoid possible deadlocks as we
already have check_page locked) and mlock_vma_page() is performed only
upon success. If the page lock cannot be obtained, the page is left
without PG_mlocked, which is again not a problem in the whole unevictable
memory design.
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Bob Liu <bob.liu@oracle.com>
Reported-by: Sasha Levin <sasha.levin@oracle.com>
Cc: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Cc: Michel Lespinasse <walken@google.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Acked-by: Rik van Riel <riel@redhat.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Hugh Dickins <hughd@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Nicholas Bellinger [Wed, 19 Feb 2014 23:32:14 +0000 (23:32 +0000)]
iscsi-target: Fix ERL=2 ASYNC_EVENT connection pointer bug
commit
d444edc679e7713412f243b792b1f964e5cff1e1 upstream.
This patch fixes a long-standing bug in iscsit_build_conn_drop_async_message()
where during ERL=2 connection recovery, a bogus conn_p pointer could
end up being used to send the ISCSI_OP_ASYNC_EVENT + DROPPING_CONNECTION
notifying the initiator that cmd->logout_cid has failed.
The bug was manifesting itself as an OOPs in iscsit_allocate_cmd() with
a bogus conn_p pointer in iscsit_build_conn_drop_async_message().
Reported-by: Arshad Hussain <arshad.hussain@calsoftinc.com>
Reported-by: santosh kulkarni <santosh.kulkarni@calsoftinc.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
alex chen [Thu, 3 Apr 2014 21:47:05 +0000 (14:47 -0700)]
ocfs2: do not put bh when buffer_uptodate failed
commit
f7cf4f5bfe073ad792ab49c04f247626b3e38db6 upstream.
Do not put bh when buffer_uptodate failed in ocfs2_write_block and
ocfs2_write_super_or_backup, because it will put bh in b_end_io.
Otherwise it will hit a warning "VFS: brelse: Trying to free free
buffer".
Signed-off-by: Alex Chen <alex.chen@huawei.com>
Reviewed-by: Joseph Qi <joseph.qi@huawei.com>
Reviewed-by: Srinivas Eeda <srinivas.eeda@oracle.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Acked-by: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Junxiao Bi [Thu, 3 Apr 2014 21:46:51 +0000 (14:46 -0700)]
ocfs2: dlm: fix recovery hung
commit
ded2cf71419b9353060e633b59e446c42a6a2a09 upstream.
There is a race window in dlm_do_recovery() between dlm_remaster_locks()
and dlm_reset_recovery() when the recovery master nearly finish the
recovery process for a dead node. After the master sends FINALIZE_RECO
message in dlm_remaster_locks(), another node may become the recovery
master for another dead node, and then send the BEGIN_RECO message to
all the nodes included the old master, in the handler of this message
dlm_begin_reco_handler() of old master, dlm->reco.dead_node and
dlm->reco.new_master will be set to the second dead node and the new
master, then in dlm_reset_recovery(), these two variables will be reset
to default value. This will cause new recovery master can not finish
the recovery process and hung, at last the whole cluster will hung for
recovery.
old recovery master: new recovery master:
dlm_remaster_locks()
become recovery master for
another dead node.
dlm_send_begin_reco_message()
dlm_begin_reco_handler()
{
if (dlm->reco.state & DLM_RECO_STATE_FINALIZE) {
return -EAGAIN;
}
dlm_set_reco_master(dlm, br->node_idx);
dlm_set_reco_dead_node(dlm, br->dead_node);
}
dlm_reset_recovery()
{
dlm_set_reco_dead_node(dlm, O2NM_INVALID_NODE_NUM);
dlm_set_reco_master(dlm, O2NM_INVALID_NODE_NUM);
}
will hang in dlm_remaster_locks() for
request dlm locks info
Before send FINALIZE_RECO message, recovery master should set
DLM_RECO_STATE_FINALIZE for itself and clear it after the recovery done,
this can break the race windows as the BEGIN_RECO messages will not be
handled before DLM_RECO_STATE_FINALIZE flag is cleared.
A similar race may happen between new recovery master and normal node
which is in dlm_finalize_reco_handler(), also fix it.
Signed-off-by: Junxiao Bi <junxiao.bi@oracle.com>
Reviewed-by: Srinivas Eeda <srinivas.eeda@oracle.com>
Reviewed-by: Wengang Wang <wen.gang.wang@oracle.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Junxiao Bi [Thu, 3 Apr 2014 21:46:49 +0000 (14:46 -0700)]
ocfs2: dlm: fix lock migration crash
commit
34aa8dac482f1358d59110d5e3a12f4351f6acaa upstream.
This issue was introduced by commit
800deef3f6f8 ("ocfs2: use
list_for_each_entry where benefical") in 2007 where it replaced
list_for_each with list_for_each_entry. The variable "lock" will point
to invalid data if "tmpq" list is empty and a panic will be triggered
due to this. Sunil advised reverting it back, but the old version was
also not right. At the end of the outer for loop, that
list_for_each_entry will also set "lock" to an invalid data, then in the
next loop, if the "tmpq" list is empty, "lock" will be an stale invalid
data and cause the panic. So reverting the list_for_each back and reset
"lock" to NULL to fix this issue.
Another concern is that this seemes can not happen because the "tmpq"
list should not be empty. Let me describe how.
old lock resource owner(node 1): migratation target(node 2):
image there's lockres with a EX lock from node 2 in
granted list, a NR lock from node x with convert_type
EX in converting list.
dlm_empty_lockres() {
dlm_pick_migration_target() {
pick node 2 as target as its lock is the first one
in granted list.
}
dlm_migrate_lockres() {
dlm_mark_lockres_migrating() {
res->state |= DLM_LOCK_RES_BLOCK_DIRTY;
wait_event(dlm->ast_wq, !dlm_lockres_is_dirty(dlm, res));
//after the above code, we can not dirty lockres any more,
// so dlm_thread shuffle list will not run
downconvert lock from EX to NR
upconvert lock from NR to EX
<<< migration may schedule out here, then
<<< node 2 send down convert request to convert type from EX to
<<< NR, then send up convert request to convert type from NR to
<<< EX, at this time, lockres granted list is empty, and two locks
<<< in the converting list, node x up convert lock followed by
<<< node 2 up convert lock.
// will set lockres RES_MIGRATING flag, the following
// lock/unlock can not run
dlm_lockres_release_ast(dlm, res);
}
dlm_send_one_lockres()
dlm_process_recovery_data()
for (i=0; i<mres->num_locks; i++)
if (ml->node == dlm->node_num)
for (j = DLM_GRANTED_LIST; j <= DLM_BLOCKED_LIST; j++) {
list_for_each_entry(lock, tmpq, list)
if (lock) break; <<< lock is invalid as grant list is empty.
}
if (lock->ml.node != ml->node)
BUG() >>> crash here
}
I see the above locks status from a vmcore of our internal bug.
Signed-off-by: Junxiao Bi <junxiao.bi@oracle.com>
Reviewed-by: Wengang Wang <wen.gang.wang@oracle.com>
Cc: Sunil Mushran <sunil.mushran@gmail.com>
Reviewed-by: Srinivas Eeda <srinivas.eeda@oracle.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Matt Fleming [Thu, 3 Apr 2014 21:46:20 +0000 (14:46 -0700)]
sh: fix format string bug in stack tracer
commit
a0c32761e73c9999cbf592b702f284221fea8040 upstream.
Kees reported the following error:
arch/sh/kernel/dumpstack.c: In function 'print_trace_address':
arch/sh/kernel/dumpstack.c:118:2: error: format not a string literal and no format arguments [-Werror=format-security]
Use the "%s" format so that it's impossible to interpret 'data' as a
format string.
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Reported-by: Kees Cook <keescook@chromium.org>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Alex Deucher [Mon, 31 Mar 2014 15:19:46 +0000 (11:19 -0400)]
drm/radeon: call drm_edid_to_eld when we update the edid
commit
16086279353cbfecbb3ead474072dced17b97ddc upstream.
This needs to be done to update some of the fields in
the connector structure used by the audio code.
Noticed by several users on irc.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Christopher Friedt [Sat, 1 Feb 2014 15:01:15 +0000 (10:01 -0500)]
drm/vmwgfx: correct fb_fix_screeninfo.line_length
commit
aa6de142c901cd2d90ef08db30ae87da214bedcc upstream.
Previously, the vmwgfx_fb driver would allow users to call FBIOSET_VINFO, but it would not adjust
the FINFO properly, resulting in distorted screen rendering. The patch corrects that behaviour.
See https://bugs.gentoo.org/show_bug.cgi?id=494794 for examples.
Signed-off-by: Christopher Friedt <chrisfriedt@gmail.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Jeff Mahoney [Wed, 2 Apr 2014 18:40:26 +0000 (14:40 -0400)]
reiserfs: fix race in readdir
commit
01d8885785a60ae8f4c37b0ed75bdc96d0fc6a44 upstream.
jdm-20004 reiserfs_delete_xattrs: Couldn't delete all xattrs (-2)
The -ENOENT is due to readdir calling dir_emit on the same entry twice.
If the dir_emit callback sleeps and the tree is changed underneath us,
we won't be able to trust deh_offset(deh) anymore. We need to save
next_pos before we might sleep so we can find the next entry.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Yann Droneaud [Mon, 10 Mar 2014 22:06:25 +0000 (23:06 +0100)]
IB/ehca: Returns an error on ib_copy_to_udata() failure
commit
5bdb0f02add5994b0bc17494f4726925ca5d6ba1 upstream.
In case of error when writing to userspace, function ehca_create_cq()
does not set an error code before following its error path.
This patch sets the error code to -EFAULT when ib_copy_to_udata()
fails.
This was caught when using spatch (aka. coccinelle)
to rewrite call to ib_copy_{from,to}_udata().
Link: https://www.gitorious.org/opteya/coccib/source/75ebf2c1033c64c1d81df13e4ae44ee99c989eba:ib_copy_udata.cocci
Link: http://marc.info/?i=cover.1394485254.git.ydroneaud@opteya.com
Signed-off-by: Yann Droneaud <ydroneaud@opteya.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Yann Droneaud [Mon, 10 Mar 2014 22:06:26 +0000 (23:06 +0100)]
IB/mthca: Return an error on ib_copy_to_udata() failure
commit
08e74c4b00c30c232d535ff368554959403d0432 upstream.
In case of error when writing to userspace, the function mthca_create_cq()
does not set an error code before following its error path.
This patch sets the error code to -EFAULT when ib_copy_to_udata() fails.
This was caught when using spatch (aka. coccinelle)
to rewrite call to ib_copy_{from,to}_udata().
Link: https://www.gitorious.org/opteya/coccib/source/75ebf2c1033c64c1d81df13e4ae44ee99c989eba:ib_copy_udata.cocci
Link: http://marc.info/?i=cover.1394485254.git.ydroneaud@opteya.com
Signed-off-by: Yann Droneaud <ydroneaud@opteya.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
W. Trevor King [Sun, 30 Mar 2014 00:47:24 +0000 (17:47 -0700)]
ALSA: hda - Enable beep for ASUS 1015E
commit
a4b7f21d7b42b33609df3f86992a8deff80abfaf upstream.
The `lspci -nnvv` output contains (wrapped for line length):
00:1b.0 Audio device [0403]:
Intel Corporation 7 Series/C210 Series Chipset Family
High Definition Audio Controller [8086:1e20] (rev 04)
Subsystem: ASUSTeK Computer Inc. Device [1043:115d]
Signed-off-by: W. Trevor King <wking@tremily.us>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Huacai Chen [Sat, 22 Mar 2014 09:21:44 +0000 (17:21 +0800)]
MIPS: Hibernate: Flush TLB entries in swsusp_arch_resume()
commit
c14af233fbe279d0e561ecf84f1208b1bae087ef upstream.
The original MIPS hibernate code flushes cache and TLB entries in
swsusp_arch_resume(). But they are removed in Commit
44eeab67416711
(MIPS: Hibernation: Remove SMP TLB and cacheflushing code.). A cross-
CPU flush is surely unnecessary because all but the local CPU have
already been disabled. But a local flush (at least the TLB flush) is
needed. When we do hibernation on Loongson-3 with an E1000E NIC, it is
very easy to produce a kernel panic (kernel page fault, or unaligned
access). The root cause is E1000E driver use vzalloc_node() to allocate
pages, the stale TLB entries of the booting kernel will be misused by
the resumed target kernel.
Signed-off-by: Huacai Chen <chenhc@lemote.com>
Cc: John Crispin <john@phrozen.org>
Cc: Steven J. Hill <Steven.Hill@imgtec.com>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Cc: linux-mips@linux-mips.org
Cc: Fuxin Zhang <zhangfx@lemote.com>
Cc: Zhangjin Wu <wuzhangjin@gmail.com>
Patchwork: https://patchwork.linux-mips.org/patch/6643/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
J. Bruce Fields [Mon, 10 Mar 2014 18:17:55 +0000 (14:17 -0400)]
nfsd4: fix setclientid encode size
commit
480efaee085235bb848f1063f959bf144103c342 upstream.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Mike Snitzer [Fri, 28 Mar 2014 06:15:02 +0000 (02:15 -0400)]
dm thin: fix dangling bio in process_deferred_bios error path
commit
fe76cd88e654124d1431bb662a0fc6e99ca811a5 upstream.
If unable to ensure_next_mapping() we must add the current bio, which
was removed from the @bios list via bio_list_pop, back to the
deferred_bios list before all the remaining @bios.
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Acked-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Jani Nikula [Fri, 28 Mar 2014 06:54:04 +0000 (08:54 +0200)]
drm/i915/tv: fix gen4 composite s-video tv-out
commit
e1f23f3dd817f53f622e486913ac662add46eeed upstream.
This is *not* bisected, but the likely regression is
commit
c35614380d5c956bfda20eab2755b2f5a7d6f1e7
Author: Zhao Yakui <yakui.zhao@intel.com>
Date: Tue Nov 24 09:48:48 2009 +0800
drm/i915: Don't set up the TV port if it isn't in the BIOS table.
The commit does not check for all TV device types that might be present
in the VBT, disabling TV out for the missing ones. Add composite
S-video.
Reported-and-tested-by: Matthew Khouzam <matthew.khouzam@gmail.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=73362
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
[bwh: Backported to 3.2: s/old\.device_type/device_type/]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
J. Bruce Fields [Mon, 24 Feb 2014 19:59:47 +0000 (14:59 -0500)]
nfsd: notify_change needs elevated write count
commit
9f67f189939eccaa54f3d2c9cf10788abaf2d584 upstream.
Looks like this bug has been here since these write counts were
introduced, not sure why it was just noticed now.
Thanks also to Jan Kara for pointing out the problem.
Reported-by: Matthew Rahtz <mrahtz@rapitasystems.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Ben Hutchings [Sun, 27 Apr 2014 00:20:19 +0000 (01:20 +0100)]
nfsd: Add fh_{want,drop}_write()
Part of commit
bad0dcffc21d17a07dbb83a2bf764f35a57feba5
('new helpers: fh_{want,drop}_write()') upstream.
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
J. Bruce Fields [Tue, 28 Jan 2014 21:01:04 +0000 (16:01 -0500)]
nfsd4: session needs room for following op to error out
commit
4c69d5855a16f7378648c5733632628fa10431db upstream.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
J. Bruce Fields [Tue, 28 Jan 2014 21:05:15 +0000 (16:05 -0500)]
nfsd4: buffer-length check for SUPPATTR_EXCLCREAT
commit
de3997a7eeb9ea286b15879fdf8a95aae065b4f7 upstream.
This was an omission from
8c18f2052e756e7d5dea712fc6e7ed70c00e8a39
"nfsd41: SUPPATTR_EXCLCREAT attribute".
Cc: Benny Halevy <bhalevy@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Jason Wang [Fri, 28 Feb 2014 03:30:29 +0000 (11:30 +0800)]
x86, hyperv: Bypass the timer_irq_works() check
commit
ca3ba2a2f4a49a308e7d78c784d51b2332064f15 upstream.
This patch bypass the timer_irq_works() check for hyperv guest since:
- It was guaranteed to work.
- timer_irq_works() may fail sometime due to the lpj calibration were inaccurate
in a hyperv guest or a buggy host.
In the future, we should get the tsc frequency from hypervisor and use preset
lpj instead.
[ hpa: I would prefer to not defer things to "the future" in the future... ]
Cc: K. Y. Srinivasan <kys@microsoft.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Acked-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Link: http://lkml.kernel.org/r/1393558229-14755-1-git-send-email-jasowang@redhat.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Marek Vasut [Mon, 24 Mar 2014 02:38:10 +0000 (03:38 +0100)]
gpio: mxs: Allow for recursive enable_irq_wake() call
commit
a585f87c863e4e1d496459d382b802bf5ebe3717 upstream.
The scenario here is that someone calls enable_irq_wake() from somewhere
in the code. This will result in the lockdep producing a backtrace as can
be seen below. In my case, this problem is triggered when using the wl1271
(TI WlCore) driver found in drivers/net/wireless/ti/ .
The problem cause is rather obvious from the backtrace, but let's outline
the dependency. enable_irq_wake() grabs the IRQ buslock in irq_set_irq_wake(),
which in turns calls mxs_gpio_set_wake_irq() . But mxs_gpio_set_wake_irq()
calls enable_irq_wake() again on the one-level-higher IRQ , thus it tries to
grab the IRQ buslock again in irq_set_irq_wake() . Because the spinlock in
irq_set_irq_wake()->irq_get_desc_buslock()->__irq_get_desc_lock() is not
marked as recursive, lockdep will spew the stuff below.
We know we can safely re-enter the lock, so use IRQ_GC_INIT_NESTED_LOCK to
fix the spew.
=============================================
[ INFO: possible recursive locking detected ]
3.10.33-00012-gf06b763-dirty #61 Not tainted
---------------------------------------------
kworker/0:1/18 is trying to acquire lock:
(&irq_desc_lock_class){-.-...}, at: [<
c00685f0>] __irq_get_desc_lock+0x48/0x88
but task is already holding lock:
(&irq_desc_lock_class){-.-...}, at: [<
c00685f0>] __irq_get_desc_lock+0x48/0x88
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(&irq_desc_lock_class);
lock(&irq_desc_lock_class);
*** DEADLOCK ***
May be due to missing lock nesting notation
3 locks held by kworker/0:1/18:
#0: (events){.+.+.+}, at: [<
c0036308>] process_one_work+0x134/0x4a4
#1: ((&fw_work->work)){+.+.+.}, at: [<
c0036308>] process_one_work+0x134/0x4a4
#2: (&irq_desc_lock_class){-.-...}, at: [<
c00685f0>] __irq_get_desc_lock+0x48/0x88
stack backtrace:
CPU: 0 PID: 18 Comm: kworker/0:1 Not tainted
3.10.33-00012-gf06b763-dirty #61
Workqueue: events request_firmware_work_func
[<
c0013eb4>] (unwind_backtrace+0x0/0xf0) from [<
c0011c74>] (show_stack+0x10/0x14)
[<
c0011c74>] (show_stack+0x10/0x14) from [<
c005bb08>] (__lock_acquire+0x140c/0x1a64)
[<
c005bb08>] (__lock_acquire+0x140c/0x1a64) from [<
c005c6a8>] (lock_acquire+0x9c/0x104)
[<
c005c6a8>] (lock_acquire+0x9c/0x104) from [<
c051d5a4>] (_raw_spin_lock_irqsave+0x44/0x58)
[<
c051d5a4>] (_raw_spin_lock_irqsave+0x44/0x58) from [<
c00685f0>] (__irq_get_desc_lock+0x48/0x88)
[<
c00685f0>] (__irq_get_desc_lock+0x48/0x88) from [<
c0068e78>] (irq_set_irq_wake+0x20/0xf4)
[<
c0068e78>] (irq_set_irq_wake+0x20/0xf4) from [<
c027260c>] (mxs_gpio_set_wake_irq+0x1c/0x24)
[<
c027260c>] (mxs_gpio_set_wake_irq+0x1c/0x24) from [<
c0068cf4>] (set_irq_wake_real+0x30/0x44)
[<
c0068cf4>] (set_irq_wake_real+0x30/0x44) from [<
c0068ee4>] (irq_set_irq_wake+0x8c/0xf4)
[<
c0068ee4>] (irq_set_irq_wake+0x8c/0xf4) from [<
c0310748>] (wlcore_nvs_cb+0x10c/0x97c)
[<
c0310748>] (wlcore_nvs_cb+0x10c/0x97c) from [<
c02be5e8>] (request_firmware_work_func+0x38/0x58)
[<
c02be5e8>] (request_firmware_work_func+0x38/0x58) from [<
c0036394>] (process_one_work+0x1c0/0x4a4)
[<
c0036394>] (process_one_work+0x1c0/0x4a4) from [<
c0036a4c>] (worker_thread+0x138/0x394)
[<
c0036a4c>] (worker_thread+0x138/0x394) from [<
c003cb74>] (kthread+0xa4/0xb0)
[<
c003cb74>] (kthread+0xa4/0xb0) from [<
c000ee00>] (ret_from_fork+0x14/0x34)
wlcore: loaded
Signed-off-by: Marek Vasut <marex@denx.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Josef Bacik [Fri, 7 Mar 2014 00:01:07 +0000 (19:01 -0500)]
Btrfs: fix deadlock with nested trans handles
commit
3bbb24b20a8800158c33eca8564f432dd14d0bf3 upstream.
Zach found this deadlock that would happen like this
btrfs_end_transaction <- reduce trans->use_count to 0
btrfs_run_delayed_refs
btrfs_cow_block
find_free_extent
btrfs_start_transaction <- increase trans->use_count to 1
allocate chunk
btrfs_end_transaction <- decrease trans->use_count to 0
btrfs_run_delayed_refs
lock tree block we are cowing above ^^
We need to only decrease trans->use_count if it is above 1, otherwise leave it
alone. This will make nested trans be the only ones who decrease their added
ref, and will let us get rid of the trans->use_count++ hack if we have to commit
the transaction. Thanks,
Reported-by: Zach Brown <zab@redhat.com>
Signed-off-by: Josef Bacik <jbacik@fb.com>
Tested-by: Zach Brown <zab@redhat.com>
Signed-off-by: Chris Mason <clm@fb.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Richard Guy Briggs [Wed, 11 Dec 2013 03:10:41 +0000 (22:10 -0500)]
audit: convert PPIDs to the inital PID namespace.
commit
c92cdeb45eea38515e82187f48c2e4f435fb4e25 upstream.
sys_getppid() returns the parent pid of the current process in its own pid
namespace. Since audit filters are based in the init pid namespace, a process
could avoid a filter or trigger an unintended one by being in an alternate pid
namespace or log meaningless information.
Switch to task_ppid_nr() for PPIDs to anchor all audit filters in the
init_pid_ns.
(informed by ebiederman's
6c621b7e)
Cc: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
[bwh: Backported to 3.2: sys_getppid() is used by audit_exit() but not
audit_log_task_info()]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Richard Guy Briggs [Thu, 15 Aug 2013 22:05:12 +0000 (18:05 -0400)]
pid: get pid_t ppid of task in init_pid_ns
commit
ad36d28293936b03d6b7996e9d6aadfd73c0eb08 upstream.
Added the functions task_ppid_nr_ns() and task_ppid_nr() to abstract the lookup
of the PPID (real_parent's pid_t) of a process, including rcu locking, in the
arbitrary and init_pid_ns.
This provides an alternative to sys_getppid(), which is relative to the child
process' pid namespace.
(informed by ebiederman's
6c621b7e)
Cc: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Krzysztof Kozlowski [Tue, 11 Feb 2014 10:03:29 +0000 (11:03 +0100)]
mfd: 88pm860x: Fix possible NULL pointer dereference on i2c_new_dummy error
commit
159ce52a6b777fc82fa0b51c7440e25f9e4c6feb upstream.
During probe the driver allocates dummy I2C device for companion chip
with i2c_new_dummy() but it does not check the return value of this call.
In case of error (i2c_new_device(): memory allocation failure or I2C
address cannot be used) this function returns NULL which is later used
by regmap_init_i2c().
If i2c_new_dummy() fails for companion device, fail also the probe for
main MFD driver.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
[bwh: Backported to 3.2:
- Adjust filename, context
- Add kfree() before return, as driver is not using managed allocations]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Krzysztof Kozlowski [Tue, 11 Feb 2014 10:03:33 +0000 (11:03 +0100)]
mfd: max8925: Fix possible NULL pointer dereference on i2c_new_dummy error
commit
96cf3dedc491d2f1f66cc26217f2b06b0c7b6797 upstream.
During probe the driver allocates dummy I2C devices for RTC and ADC
with i2c_new_dummy() but it does not check the return value of this
calls.
In case of error (i2c_new_device(): memory allocation failure or I2C
address cannot be used) this function returns NULL which is later used
by i2c_unregister_device().
If i2c_new_dummy() fails for RTC or ADC devices, fail also the probe
for main MFD driver.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Krzysztof Kozlowski [Tue, 11 Feb 2014 10:03:35 +0000 (11:03 +0100)]
mfd: max8998: Fix possible NULL pointer dereference on i2c_new_dummy error
commit
ed26f87b9f71693a1d1ee85f5e6209601505080f upstream.
During probe the driver allocates dummy I2C device for RTC with i2c_new_dummy() but it does not check the return value of this call.
In case of error (i2c_new_device(): memory allocation failure or I2C
address cannot be used) this function returns NULL which is later used
by i2c_unregister_device().
If i2c_new_dummy() fails for RTC device, fail also the probe for
main MFD driver.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Krzysztof Kozlowski [Tue, 11 Feb 2014 10:03:34 +0000 (11:03 +0100)]
mfd: max8997: Fix possible NULL pointer dereference on i2c_new_dummy error
commit
97dc4ed3fa377ec91bb60ba98b70d645c2099384 upstream.
During probe the driver allocates dummy I2C devices for RTC, haptic and
MUIC with i2c_new_dummy() but it does not check the return value of this
calls.
In case of error (i2c_new_device(): memory allocation failure or I2C
address cannot be used) this function returns NULL which is later used
by i2c_unregister_device().
If i2c_new_dummy() fails for RTC, haptic or MUIC devices, fail also the
probe for main MFD driver.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Linus Walleij [Wed, 29 Jan 2014 10:09:53 +0000 (11:09 +0100)]
mfd: Include all drivers in subsystem menu
commit
a6e6e660baa5c583022e3e48c85316bace027825 upstream.
It is currently not possible to select the SA1100 or Vexpress
drivers in the MFD subsystem, because the menu for the entire
subsystem ends before these options are presented.
Move the main menu closing and the endif for HAS_IOMEM to the
end of the file so these are selectable again.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Yann Droneaud [Mon, 10 Mar 2014 22:06:27 +0000 (23:06 +0100)]
IB/nes: Return an error on ib_copy_from_udata() failure instead of NULL
commit
9d194d1025f463392feafa26ff8c2d8247f71be1 upstream.
In case of error while accessing to userspace memory, function
nes_create_qp() returns NULL instead of an error code wrapped through
ERR_PTR(). But NULL is not expected by ib_uverbs_create_qp(), as it
check for error with IS_ERR().
As page 0 is likely not mapped, it is going to trigger an Oops when
the kernel will try to dereference NULL pointer to access to struct
ib_qp's fields.
In some rare cases, page 0 could be mapped by userspace, which could
turn this bug to a vulnerability that could be exploited: the function
pointers in struct ib_device will be under userspace total control.
This was caught when using spatch (aka. coccinelle)
to rewrite calls to ib_copy_{from,to}_udata().
Link: https://www.gitorious.org/opteya/ib-hw-nes-create-qp-null
Link: https://www.gitorious.org/opteya/coccib/source/75ebf2c1033c64c1d81df13e4ae44ee99c989eba:ib_copy_udata.cocci
Link: http://marc.info/?i=cover.1394485254.git.ydroneaud@opteya.com
Signed-off-by: Yann Droneaud <ydroneaud@opteya.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Dennis Dalessandro [Thu, 20 Feb 2014 16:02:53 +0000 (11:02 -0500)]
IB/ipath: Fix potential buffer overrun in sending diag packet routine
commit
a2cb0eb8a64adb29a99fd864013de957028f36ae upstream.
Guard against a potential buffer overrun. The size to read from the
user is passed in, and due to the padding that needs to be taken into
account, as well as the place holder for the ICRC it is possible to
overflow the 32bit value which would cause more data to be copied from
user space than is allocated in the buffer.
Reported-by: Nico Golde <nico@ngolde.de>
Reported-by: Fabian Yamaguchi <fabs@goesec.de>
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Felix Fietkau [Sun, 9 Mar 2014 10:02:54 +0000 (11:02 +0100)]
ath9k: fix ready time of the multicast buffer queue
commit
3b3e0efb5c72c4fc940af50b33626b8a78a907dc upstream.
qi->tqi_readyTime is written directly to registers that expect
microseconds as unit instead of TU.
When setting the CABQ ready time, cur_conf->beacon_interval is in TU, so
convert it to microseconds before passing it to ath9k_hw.
This should hopefully fix some Tx DMA issues with buffered multicast
frames in AP mode.
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Eric Whitney [Fri, 14 Mar 2014 03:34:16 +0000 (23:34 -0400)]
ext4: fix partial cluster handling for bigalloc file systems
commit
c06344939422bbd032ac967223a7863de57496b5 upstream.
Commit
9cb00419fa, which enables hole punching for bigalloc file
systems, exposed a bug introduced by commit
6ae06ff51e in an earlier
release. When run on a bigalloc file system, xfstests generic/013, 068,
075, 083, 091, 100, 112, 127, 263, 269, and 270 fail with e2fsck errors
or cause kernel error messages indicating that previously freed blocks
are being freed again.
The latter commit optimizes the selection of the starting extent in
ext4_ext_rm_leaf() when hole punching by beginning with the extent
supplied in the path argument rather than with the last extent in the
leaf node (as is still done when truncating). However, the code in
rm_leaf that initially sets partial_cluster to track cluster sharing on
extent boundaries is only guaranteed to run if rm_leaf starts with the
last node in the leaf. Consequently, partial_cluster is not correctly
initialized when hole punching, and a cluster on the boundary of a
punched region that should be retained may instead be deallocated.
Signed-off-by: Eric Whitney <enwlinux@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Rusty Russell [Thu, 13 Mar 2014 00:53:38 +0000 (11:23 +1030)]
virtio_balloon: don't softlockup on huge balloon changes.
commit
1f74ef0f2d7d692fcd615621e0e734c3e7771413 upstream.
When adding or removing 100G from a balloon:
BUG: soft lockup - CPU#0 stuck for 22s! [vballoon:367]
We have a wait_event_interruptible(), but the condition is always true
(more ballooning to do) so we don't ever sleep. We also have a
wait_event() for the host to ack, but that is also always true as QEMU
is synchronous for balloon operations.
Reported-by: Gopesh Kumar Chaudhary <gopchaud@in.ibm.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Emmanuel Grumbach [Mon, 10 Mar 2014 13:22:03 +0000 (15:22 +0200)]
iwlwifi: dvm: take mutex when sending SYNC BT config command
commit
82e5a649453a3cf23516277abb84273768a1592b upstream.
There is a flow in which we send the host command in SYNC
mode, but we don't take priv->mutex.
Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1046495
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
[bwh: Backported to 3.2:
- Adjust filename, context
- mutex is priv->shrd->mutex]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Ajesh Kunhipurayil Vijayan [Mon, 6 Jan 2014 13:36:55 +0000 (19:06 +0530)]
jffs2: Fix crash due to truncation of csize
commit
41bf1a24c1001f4d0d41a78e1ac575d2f14789d7 upstream.
mounting JFFS2 partition sometimes crashes with this call trace:
[ 1322.240000] Kernel bug detected[#1]:
[ 1322.244000] Cpu 2
[ 1322.244000] $ 0 :
0000000000000000 0000000000000018 000000003ff00070 0000000000000001
[ 1322.252000] $ 4 :
0000000000000000 c0000000f3980150 0000000000000000 0000000000010000
[ 1322.260000] $ 8 :
ffffffffc09cd5f8 0000000000000001 0000000000000088 c0000000ed300de8
[ 1322.268000] $12 :
e5e19d9c5f613a45 ffffffffc046d464 0000000000000000 66227ba5ea67b74e
[ 1322.276000] $16 :
c0000000f1769c00 c0000000ed1e0200 c0000000f3980150 0000000000000000
[ 1322.284000] $20 :
c0000000f3a80000 00000000fffffffc c0000000ed2cfbd8 c0000000f39818f0
[ 1322.292000] $24 :
0000000000000004 0000000000000000
[ 1322.300000] $28 :
c0000000ed2c0000 c0000000ed2cfab8 0000000000010000 ffffffffc039c0b0
[ 1322.308000] Hi :
000000000000023c
[ 1322.312000] Lo :
000000000003f802
[ 1322.316000] epc :
ffffffffc039a9f8 check_tn_node+0x88/0x3b0
[ 1322.320000] Not tainted
[ 1322.324000] ra :
ffffffffc039c0b0 jffs2_do_read_inode_internal+0x1250/0x1e48
[ 1322.332000] Status:
5400f8e3 KX SX UX KERNEL EXL IE
[ 1322.336000] Cause :
00800034
[ 1322.340000] PrId :
000c1004 (Netlogic XLP)
[ 1322.344000] Modules linked in:
[ 1322.348000] Process jffs2_gcd_mtd7 (pid: 264, threadinfo=
c0000000ed2c0000, task=
c0000000f0e68dd8, tls=
0000000000000000)
[ 1322.356000] Stack :
c0000000f1769e30 c0000000ed010780 c0000000ed010780 c0000000ed300000
c0000000f1769c00 c0000000f3980150 c0000000f3a80000 00000000fffffffc
c0000000ed2cfbd8 ffffffffc039c0b0 ffffffffc09c6340 0000000000001000
0000000000000dec ffffffffc016c9d8 c0000000f39805a0 c0000000f3980180
0000008600000000 0000000000000000 0000000000000000 0000000000000000
0001000000000dec c0000000f1769d98 c0000000ed2cfb18 0000000000010000
0000000000010000 0000000000000044 c0000000f3a80000 c0000000f1769c00
c0000000f3d207a8 c0000000f1769d98 c0000000f1769de0 ffffffffc076f9c0
0000000000000009 0000000000000000 0000000000000000 ffffffffc039cf90
0000000000000017 ffffffffc013fbdc 0000000000000001 000000010003e61c
...
[ 1322.424000] Call Trace:
[ 1322.428000] [<
ffffffffc039a9f8>] check_tn_node+0x88/0x3b0
[ 1322.432000] [<
ffffffffc039c0b0>] jffs2_do_read_inode_internal+0x1250/0x1e48
[ 1322.440000] [<
ffffffffc039cf90>] jffs2_do_crccheck_inode+0x70/0xd0
[ 1322.448000] [<
ffffffffc03a1b80>] jffs2_garbage_collect_pass+0x160/0x870
[ 1322.452000] [<
ffffffffc03a392c>] jffs2_garbage_collect_thread+0xdc/0x1f0
[ 1322.460000] [<
ffffffffc01541c8>] kthread+0xb8/0xc0
[ 1322.464000] [<
ffffffffc0106d18>] kernel_thread_helper+0x10/0x18
[ 1322.472000]
[ 1322.472000]
Code:
67bd0050 94a4002c 2c830001 <
00038036>
de050218 2403fffc 0080a82d 00431824 24630044
[ 1322.480000] ---[ end trace
b052bb90e97dfbf5 ]---
The variable csize in structure jffs2_tmp_dnode_info is of type uint16_t, but it
is used to hold the compressed data length(csize) which is declared as uint32_t.
So, when the value of csize exceeds 16bits, it gets truncated when assigned to
tn->csize. This is causing a kernel BUG.
Changing the definition of csize in jffs2_tmp_dnode_info to uint32_t fixes the issue.
Signed-off-by: Ajesh Kunhipurayil Vijayan <ajesh@broadcom.com>
Signed-off-by: Kamlakant Patel <kamlakant.patel@broadcom.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Kamlakant Patel [Mon, 6 Jan 2014 13:36:54 +0000 (19:06 +0530)]
jffs2: Fix segmentation fault found in stress test
commit
3367da5610c50e6b83f86d366d72b41b350b06a2 upstream.
Creating a large file on a JFFS2 partition sometimes crashes with this call
trace:
[ 306.476000] CPU 13 Unable to handle kernel paging request at virtual address
c0000000dfff8002, epc ==
ffffffffc03a80a8, ra ==
ffffffffc03a8044
[ 306.488000] Oops[#1]:
[ 306.488000] Cpu 13
[ 306.492000] $ 0 :
0000000000000000 0000000000000000 0000000000008008 0000000000008007
[ 306.500000] $ 4 :
c0000000dfff8002 000000000000009f c0000000e0007cde c0000000ee95fa58
[ 306.508000] $ 8 :
0000000000000001 0000000000008008 0000000000010000 ffffffffffff8002
[ 306.516000] $12 :
0000000000007fa9 000000000000ff0e 000000000000ff0f 80e55930aebb92bb
[ 306.524000] $16 :
c0000000e0000000 c0000000ee95fa5c c0000000efc80000 ffffffffc09edd70
[ 306.532000] $20 :
ffffffffc2b60000 c0000000ee95fa58 0000000000000000 c0000000efc80000
[ 306.540000] $24 :
0000000000000000 0000000000000004
[ 306.548000] $28 :
c0000000ee950000 c0000000ee95f738 0000000000000000 ffffffffc03a8044
[ 306.556000] Hi :
00000000000574a5
[ 306.560000] Lo :
6193b7a7e903d8c9
[ 306.564000] epc :
ffffffffc03a80a8 jffs2_rtime_compress+0x98/0x198
[ 306.568000] Tainted: G W
[ 306.572000] ra :
ffffffffc03a8044 jffs2_rtime_compress+0x34/0x198
[ 306.580000] Status:
5000f8e3 KX SX UX KERNEL EXL IE
[ 306.584000] Cause :
00800008
[ 306.588000] BadVA :
c0000000dfff8002
[ 306.592000] PrId :
000c1100 (Netlogic XLP)
[ 306.596000] Modules linked in:
[ 306.596000] Process dd (pid: 170, threadinfo=
c0000000ee950000, task=
c0000000ee6e0858, tls=
0000000000c47490)
[ 306.608000] Stack :
7c547f377ddc7ee4 7ffc7f967f5d7fae 7f617f507fc37ff4 7e7d7f817f487f5f
7d8e7fec7ee87eb3 7e977ff27eec7f9e 7d677ec67f917f67 7f3d7e457f017ed7
7fd37f517f867eb2 7fed7fd17ca57e1d 7e5f7fe87f257f77 7fd77f0d7ede7fdb
7fba7fef7e197f99 7fde7fe07ee37eb5 7f5c7f8c7fc67f65 7f457fb87f847e93
7f737f3e7d137cd9 7f8e7e9c7fc47d25 7dbb7fac7fb67e52 7ff17f627da97f64
7f6b7df77ffa7ec5 80057ef17f357fb3 7f767fa27dfc7fd5 7fe37e8e7fd07e53
7e227fcf7efb7fa1 7f547e787fa87fcc 7fcb7fc57f5a7ffb 7fc07f6c7ea97e80
7e2d7ed17e587ee0 7fb17f9d7feb7f31 7f607e797e887faa 7f757fdd7c607ff3
7e877e657ef37fbd 7ec17fd67fe67ff7 7ff67f797ff87dc4 7eef7f3a7c337fa6
7fe57fc97ed87f4b 7ebe7f097f0b8003 7fe97e2a7d997cba 7f587f987f3c7fa9
...
[ 306.676000] Call Trace:
[ 306.680000] [<
ffffffffc03a80a8>] jffs2_rtime_compress+0x98/0x198
[ 306.684000] [<
ffffffffc0394f10>] jffs2_selected_compress+0x110/0x230
[ 306.692000] [<
ffffffffc039508c>] jffs2_compress+0x5c/0x388
[ 306.696000] [<
ffffffffc039dc58>] jffs2_write_inode_range+0xd8/0x388
[ 306.704000] [<
ffffffffc03971bc>] jffs2_write_end+0x16c/0x2d0
[ 306.708000] [<
ffffffffc01d3d90>] generic_file_buffered_write+0xf8/0x2b8
[ 306.716000] [<
ffffffffc01d4e7c>] __generic_file_aio_write+0x1ac/0x350
[ 306.720000] [<
ffffffffc01d50a0>] generic_file_aio_write+0x80/0x168
[ 306.728000] [<
ffffffffc021f7dc>] do_sync_write+0x94/0xf8
[ 306.732000] [<
ffffffffc021ff6c>] vfs_write+0xa4/0x1a0
[ 306.736000] [<
ffffffffc02202e8>] SyS_write+0x50/0x90
[ 306.744000] [<
ffffffffc0116cc0>] handle_sys+0x180/0x1a0
[ 306.748000]
[ 306.748000]
Code:
020b202d 0205282d 90a50000 <
90840000>
14a40038 00000000 0060602d 0000282d 016c5823
[ 306.760000] ---[ end trace
79dd088435be02d0 ]---
Segmentation fault
This crash is caused because the 'positions' is declared as an array of signed
short. The value of position is in the range 0..65535, and will be converted
to a negative number when the position is greater than 32767 and causes a
corruption and crash. Changing the definition to 'unsigned short' fixes this
issue
Signed-off-by: Jayachandran C <jchandra@broadcom.com>
Signed-off-by: Kamlakant Patel <kamlakant.patel@broadcom.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Li Zefan [Wed, 12 Feb 2014 20:44:56 +0000 (12:44 -0800)]
jffs2: avoid soft-lockup in jffs2_reserve_space_gc()
commit
13b546d96207c131eeae15dc7b26c6e7d0f1cad7 upstream.
We triggered soft-lockup under stress test on 2.6.34 kernel.
BUG: soft lockup - CPU#1 stuck for 60009ms! [lockf2.test:14488]
...
[<
bf09a4d4>] (jffs2_do_reserve_space+0x420/0x440 [jffs2])
[<
bf09a528>] (jffs2_reserve_space_gc+0x34/0x78 [jffs2])
[<
bf0a1350>] (jffs2_garbage_collect_dnode.isra.3+0x264/0x478 [jffs2])
[<
bf0a2078>] (jffs2_garbage_collect_pass+0x9c0/0xe4c [jffs2])
[<
bf09a670>] (jffs2_reserve_space+0x104/0x2a8 [jffs2])
[<
bf09dc48>] (jffs2_write_inode_range+0x5c/0x4d4 [jffs2])
[<
bf097d8c>] (jffs2_write_end+0x198/0x2c0 [jffs2])
[<
c00e00a4>] (generic_file_buffered_write+0x158/0x200)
[<
c00e14f4>] (__generic_file_aio_write+0x3a4/0x414)
[<
c00e15c0>] (generic_file_aio_write+0x5c/0xbc)
[<
c012334c>] (do_sync_write+0x98/0xd4)
[<
c0123a84>] (vfs_write+0xa8/0x150)
[<
c0123d74>] (sys_write+0x3c/0xc0)]
Fix this by adding a cond_resched() in the while loop.
[akpm@linux-foundation.org: don't initialize `ret']
Signed-off-by: Li Zefan <lizefan@huawei.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Li Zefan [Wed, 12 Feb 2014 20:44:57 +0000 (12:44 -0800)]
jffs2: remove from wait queue after schedule()
commit
3ead9578443b66ddb3d50ed4f53af8a0c0298ec5 upstream.
@wait is a local variable, so if we don't remove it from the wait queue
list, later wake_up() may end up accessing invalid memory.
This was spotted by eyes.
Signed-off-by: Li Zefan <lizefan@huawei.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Hidetoshi Seto [Wed, 5 Feb 2014 07:34:38 +0000 (16:34 +0900)]
Btrfs: skip submitting barrier for missing device
commit
f88ba6a2a44ee98e8d59654463dc157bb6d13c43 upstream.
I got an error on v3.13:
BTRFS error (device sdf1) in write_all_supers:3378: errno=-5 IO failure (errors while submitting device barriers.)
how to reproduce:
> mkfs.btrfs -f -d raid1 /dev/sdf1 /dev/sdf2
> wipefs -a /dev/sdf2
> mount -o degraded /dev/sdf1 /mnt
> btrfs balance start -f -sconvert=single -mconvert=single -dconvert=single /mnt
The reason of the error is that barrier_all_devices() failed to submit
barrier to the missing device. However it is clear that we cannot do
anything on missing device, and also it is not necessary to care chunks
on the missing device.
This patch stops sending/waiting barrier if device is missing.
Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Himangi Saraogi [Tue, 4 Mar 2014 23:29:57 +0000 (04:59 +0530)]
staging:serqt_usb2: Fix sparse warning restricted __le16 degrades to integer
commit
abe5d64d1a74195a44cd14624f8178b9f48b7cc7 upstream.
This patch fixes the following sparse warning :
drivers/staging/serqt_usb2/serqt_usb2.c:727:40: warning: restricted __le16 degrades to integer
Signed-off-by: Himangi Saraogi <himangi774@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Larry Finger [Tue, 4 Mar 2014 22:53:51 +0000 (16:53 -0600)]
rtlwifi: rtl8192se: Fix too long disable of IRQs
commit
2610decdd0b3808ba20471a999835cfee5275f98 upstream.
In commit
f78bccd79ba3cd9d9664981b501d57bdb81ab8a4 entitled "rtlwifi:
rtl8192ce: Fix too long disable of IRQs", Olivier Langlois
<olivier@trillion01.com> fixed a problem caused by an extra long disabling
of interrupts. This patch makes the same fix for rtl8192se.
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
[bwh: Backported to 3.2:
- Adjust context
- Drop change to an error path that we don't have]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Roman Pen [Tue, 4 Mar 2014 14:13:10 +0000 (23:13 +0900)]
blktrace: fix accounting of partially completed requests
commit
af5040da01ef980670b3741b3e10733ee3e33566 upstream.
trace_block_rq_complete does not take into account that request can
be partially completed, so we can get the following incorrect output
of blkparser:
C R 232 + 240 [0]
C R 240 + 232 [0]
C R 248 + 224 [0]
C R 256 + 216 [0]
but should be:
C R 232 + 8 [0]
C R 240 + 8 [0]
C R 248 + 8 [0]
C R 256 + 8 [0]
Also, the whole output summary statistics of completed requests and
final throughput will be incorrect.
This patch takes into account real completion size of the request and
fixes wrong completion accounting.
Signed-off-by: Roman Pen <r.peniaev@gmail.com>
CC: Steven Rostedt <rostedt@goodmis.org>
CC: Frederic Weisbecker <fweisbec@gmail.com>
CC: Ingo Molnar <mingo@redhat.com>
CC: linux-kernel@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@fb.com>
[bwh: Backported to 3.2: drop change in blk-mq.c]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Gregory CLEMENT [Mon, 3 Mar 2014 16:48:34 +0000 (17:48 +0100)]
usb: gadget: atmel_usba: fix crashed during stopping when DEBUG is enabled
commit
d8eb6c653ef6b323d630de3c5685478469e248bc upstream.
commit
511f3c5 (usb: gadget: udc-core: fix a regression during gadget driver
unbinding) introduced a crash when DEBUG is enabled.
The debug trace in the atmel_usba_stop function made the assumption that the
driver pointer passed in parameter was not NULL, but since the commit above,
such assumption was no longer always true.
This commit now uses the driver pointer stored in udc which fixes this
issue.
[ balbi@ti.com : improved commit log a bit ]
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Oleksij Rempel [Sun, 16 Feb 2014 09:59:32 +0000 (06:59 -0300)]
uvcvideo: Do not use usb_set_interface on bulk EP
commit
b1e43f232698274871e1358c276d7b0242a7d607 upstream.
The UVC specification uses alternate setting selection to notify devices
of stream start/stop. This breaks when using bulk-based devices, as the
video streaming interface has a single alternate setting in that case,
making video stream start and video stream stop events to appear
identical to the device. Bulk-based devices are thus not well supported
by UVC.
The webcam built in the Asus Zenbook UX302LA ignores the set interface
request and will keep the video stream enabled when the driver tries to
stop it. If USB autosuspend is enabled the device will then be suspended
and will crash, requiring a cold reboot.
USB trace capture showed that Windows sends a CLEAR_FEATURE(HALT)
request to the bulk endpoint when stopping the stream instead of
selecting alternate setting 0. The camera then behaves correctly, and
thus seems to require that behaviour.
Replace selection of alternate setting 0 with clearing of the endpoint
halt feature at video stream stop for bulk-based devices. Let's refrain
from blaming Microsoft this time, as it's not clear whether this
Windows-specific but USB-compliant behaviour was specifically developed
to handle bulkd-based UVC devices, or if the camera just took advantage
of it.
Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
[bwh: Backported to 3.2: adjust filename]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Hannes Reinecke [Thu, 27 Feb 2014 11:30:51 +0000 (12:30 +0100)]
tty: Set correct tty name in 'active' sysfs attribute
commit
723abd87f6e536f1353c8f64f621520bc29523a3 upstream.
The 'active' sysfs attribute should refer to the currently active tty
devices the console is running on, not the currently active console. The
console structure doesn't refer to any device in sysfs, only the tty the
console is running on has. So we need to print out the tty names in
'active', not the console names.
There is one special-case, which is tty0. If the console is directed to
it, we want 'tty0' to show up in the file, so user-space knows that the
messages get forwarded to the active VT. The ->device() callback would
resolve tty0, though. Hence, treat it special and don't call into the VT
layer to resolve it (plymouth is known to depend on it).
Cc: Lennart Poettering <lennart@poettering.net>
Cc: Kay Sievers <kay@vrfy.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Werner Fink <werner@suse.de>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[bwh: Backported to 3.2: no TTY_DRIVER_UNNUMBERED_NODE case in tty_line_name()]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Wolfram Sang [Sat, 1 Feb 2014 18:26:00 +0000 (15:26 -0300)]
media: gspca: sn9c20x: add ID for Genius Look 1320 V2
commit
61f0319193c44adbbada920162d880b1fdb3aeb3 upstream.
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
[bwh: Backported to 3.2: adjust filename]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Huang Rui [Tue, 7 Jan 2014 09:45:50 +0000 (17:45 +0800)]
usb: dwc3: fix wrong bit mask in dwc3_event_devt
commit
06f9b6e59661cee510b04513b13ea7927727d758 upstream.
Around DWC USB3 2.30a release another bit has been added to the
Device-Specific Event (DEVT) Event Information (EvtInfo) bitfield.
Because of that, what used to be 8 bits long, has become 9 bits long.
Per dwc3 2.30a+ spec in the Device-Specific Event (DEVT), the field of
Event Information Bits(EvtInfo) uses [24:16] bits, and it has 9 bits
not 8 bits. And the following reserved field uses [31:25] bits not
[31:24] bits, and it has 7 bits.
So in dwc3_event_devt, the bit mask should be:
event_info [24:16] 9 bits
reserved31_25 [31:25] 7 bits
This patch makes sure that newer core releases will work fine with
Linux and that we will decode the event information properly on new
core releases.
[ balbi@ti.com : improve commit log a bit ]
Signed-off-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Paul Gortmaker [Tue, 14 Jan 2014 21:03:37 +0000 (16:03 -0500)]
hvc: ensure hvc_init is only ever called once in hvc_console.c
commit
f76a1cbed18c86e2d192455f0daebb48458965f3 upstream.
Commit
3e6c6f630a5282df8f3393a59f10eb9c56536d23 ("Delay creation of
khcvd thread") moved the call of hvc_init from being a device_initcall
into hvc_alloc, and used a non-null hvc_driver as indication of whether
hvc_init had already been called.
The problem with this is that hvc_driver is only assigned a value
at the bottom of hvc_init, and so there is a window where multiple
hvc_alloc calls can be in progress at the same time and hence try
and call hvc_init multiple times. Previously the use of device_init
guaranteed that hvc_init was only called once.
This manifests itself as sporadic instances of two hvc_init calls
racing each other, and with the loser of the race getting -EBUSY
from tty_register_driver() and hence that virtual console fails:
Couldn't register hvc console driver
virtio-ports vport0p1: error -16 allocating hvc for port
Here we add an atomic_t to guarantee we'll never run hvc_init twice.
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fixes: 3e6c6f630a52 ("Delay creation of khcvd thread")
Reported-by: Jim Somerville <Jim.Somerville@windriver.com>
Tested-by: Jim Somerville <Jim.Somerville@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Mikulas Patocka [Thu, 23 Jan 2014 19:43:10 +0000 (14:43 -0500)]
tgafb: fix data copying
commit
6b0df6827bb6fcacb158dff29ad0a62d6418b534 upstream.
The functions for data copying copyarea_foreward_8bpp and
copyarea_backward_8bpp are buggy, they produce screen corruption.
This patch fixes the functions and moves the logic to one function
"copyarea_8bpp". For simplicity, the function only handles copying that
is aligned on 8 pixes. If we copy an unaligned area, generic function
cfb_copyarea is used.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Mikulas Patocka [Thu, 23 Jan 2014 19:41:59 +0000 (14:41 -0500)]
mach64: fix cursor when character width is not a multiple of 8 pixels
commit
43751a1b8ee2e70ce392bf31ef3133da324e68b3 upstream.
This patch fixes the hardware cursor on mach64 when font width is not a
multiple of 8 pixels.
If you load such a font, the cursor is expanded to the next 8-byte
boundary and a part of the next character after the cursor is not
visible.
For example, when you load a font with 12-pixel width, the cursor width
is 16 pixels and when the cursor is displayed, 4 pixels of the next
character are not visible.
The reason is this: atyfb_cursor is called with proper parameters to
load an image that is 12-pixel wide. However, the number is aligned on
the next 8-pixel boundary on the line
"unsigned int width = (cursor->image.width + 7) >> 3;" and the whole
function acts as it is was loading a 16-pixel image.
This patch fixes it so that the value written to the framebuffer is
padded with 0xaaaa (the transparent pattern) when the image size it not
a multiple of 8 pixels. The transparent pattern causes that the cursor
will not interfere with the next character.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Mikulas Patocka [Thu, 23 Jan 2014 19:41:09 +0000 (14:41 -0500)]
mach64: use unaligned access
commit
c29dd8696dc5dbd50b3ac441b8a26751277ba520 upstream.
This patch fixes mach64 to use unaligned access to the font bitmap.
This fixes unaligned access warning on sparc64 when 14x8 font is loaded.
On x86(64), unaligned access is handled in hardware, so both functions
le32_to_cpup and get_unaligned_le32 perform the same operation.
On RISC machines, unaligned access is not handled in hardware, so we
better use get_unaligned_le32 to avoid the unaligned trap and warning.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Mikulas Patocka [Thu, 23 Jan 2014 19:39:29 +0000 (14:39 -0500)]
framebuffer: fix cfb_copyarea
commit
00a9d699bc85052d2d3ed56251cd928024ce06a3 upstream.
The function cfb_copyarea is buggy when the copy operation is not aligned on
long boundary (4 bytes on 32-bit machines, 8 bytes on 64-bit machines).
How to reproduce:
- use x86-64 machine
- use a framebuffer driver without acceleration (for example uvesafb)
- set the framebuffer to 8-bit depth
(for example fbset -a 1024x768-60 -depth 8)
- load a font with character width that is not a multiple of 8 pixels
note: the console-tools package cannot load a font that has
width different from 8 pixels. You need to install the packages
"kbd" and "console-terminus" and use the program "setfont" to
set font width (for example: setfont Uni2-Terminus20x10)
- move some text left and right on the bash command line and you get a
screen corruption
To expose more bugs, put this line to the end of uvesafb_init_info:
info->flags |= FBINFO_HWACCEL_COPYAREA | FBINFO_READS_FAST;
- Now framebuffer console will use cfb_copyarea for console scrolling.
You get a screen corruption when console is scrolled.
This patch is a rewrite of cfb_copyarea. It fixes the bugs, with this
patch, console scrolling in 8-bit depth with a font width that is not a
multiple of 8 pixels works fine.
The cfb_copyarea code was very buggy and it looks like it was written
and never tried with non-8-pixel font.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Mikulas Patocka [Thu, 23 Jan 2014 19:39:04 +0000 (14:39 -0500)]
matroxfb: restore the registers M_ACCESS and M_PITCH
commit
a772d4736641ec1b421ad965e13457c17379fc86 upstream.
When X11 is running and the user switches back to console, the card
modifies the content of registers M_MACCESS and M_PITCH in periodic
intervals.
This patch fixes it by restoring the content of these registers before
issuing any accelerator command.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Will Deacon [Fri, 7 Feb 2014 18:12:27 +0000 (19:12 +0100)]
ARM: 7954/1: mm: remove remaining domain support from ARMv6
commit
b6ccb9803e90c16b212cf4ed62913a7591e79a39 upstream.
CPU_32v6 currently selects CPU_USE_DOMAINS if CPU_V6 and MMU. This is
because ARM 1136 r0pX CPUs lack the v6k extensions, and therefore do
not have hardware thread registers. The lack of these registers requires
the kernel to update the vectors page at each context switch in order to
write a new TLS pointer. This write must be done via the userspace
mapping, since aliasing caches can lead to expensive flushing when using
kmap. Finally, this requires the vectors page to be mapped r/w for
kernel and r/o for user, which has implications for things like put_user
which must trigger CoW appropriately when targetting user pages.
The upshot of all this is that a v6/v7 kernel makes use of domains to
segregate kernel and user memory accesses. This has the nasty
side-effect of making device mappings executable, which has been
observed to cause subtle bugs on recent cores (e.g. Cortex-A15
performing a speculative instruction fetch from the GIC and acking an
interrupt in the process).
This patch solves this problem by removing the remaining domain support
from ARMv6. A new memory type is added specifically for the vectors page
which allows that page (and only that page) to be mapped as user r/o,
kernel r/w. All other user r/o pages are mapped also as kernel r/o.
Patch co-developed with Russell King.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
[bwh: Backported to 3.2:
- Adjust filename, context
- Drop condition on CONFIG_ARM_LPAE]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Will Deacon [Sat, 1 Sep 2012 04:22:12 +0000 (05:22 +0100)]
ARM: mm: introduce present, faulting entries for PAGE_NONE
commit
26ffd0d43b186b0d5186354da8714a1c2d360df0 upstream.
PROT_NONE mappings apply the page protection attributes defined by _P000
which translate to PAGE_NONE for ARM. These attributes specify an XN,
RDONLY pte that is inaccessible to userspace. However, on kernels
configured without support for domains, such a pte *is* accessible to
the kernel and can be read via get_user, allowing tasks to read
PROT_NONE pages via syscalls such as read/write over a pipe.
This patch introduces a new software pte flag, L_PTE_NONE, that is set
to identify faulting, present entries.
Signed-off-by: Will Deacon <will.deacon@arm.com>
[bwh: Backported to 3.2 as dependency of commit
b6ccb9803e90
('ARM: 7954/1: mm: remove remaining domain support from ARMv6'):
- Drop 3-level changes
- Adjust filename, context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
David Fries [Thu, 16 Jan 2014 04:29:12 +0000 (22:29 -0600)]
w1: fix w1_send_slave dropping a slave id
commit
6b355b33a64fd6d8ead2b838ec16fb9b551f71e8 upstream.
Previous logic,
if (avail > 8) {
store slave;
return;
}
send data; clear;
The logic error is, if there isn't space send the buffer and clear,
but the slave wasn't added to the now empty buffer loosing that slave
id. It also should have been "if (avail >= 8)" because when it is 8,
there is space.
Instead, if there isn't space send and clear the buffer, then there is
always space for the slave id.
Signed-off-by: David Fries <David@Fries.net>
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Jani Nikula [Mon, 13 Jan 2014 15:30:34 +0000 (17:30 +0200)]
drm/i915: quirk invert brightness for Acer Aspire 5336
commit
0f540c3a7cfb91c9d7a19eb0c95c24c5de1197d5 upstream.
Since
commit
ee1452d7458451a7508e0663553ce88d63958157
Author: Jani Nikula <jani.nikula@intel.com>
Date: Fri Sep 20 15:05:30 2013 +0300
drm/i915: assume all GM45 Acer laptops use inverted backlight PWM
failed and was later reverted in
commit
be505f643925e257087247b996cd8ece787c12af
Author: Alexander van Heukelum <heukelum@fastmail.fm>
Date: Sat Dec 28 21:00:39 2013 +0100
Revert "drm/i915: assume all GM45 Acer laptops use inverted backlight PWM"
fix the individual broken machine instead.
Note to backporters:
http://patchwork.freedesktop.org/patch/17837/
is the patch you want for 3.13 and older.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=54171
Reference: http://mid.gmane.org/DUB115-W7628C7C710EA51AA110CD4A5000@phx.gbl
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
[danvet: Patch mangling for 3.14 plus adding the link to the original
for 3.13.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Daniel Vetter [Fri, 15 Feb 2013 17:35:30 +0000 (18:35 +0100)]
drm/i915: inverted brightness quirk for Acer Aspire 4736Z
commit
ac4199e0f047546aa40172785e26c82b54bbe811 upstream.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=53881
Cc: Jani Nikula <jani.nikula@intel.com>
Tested-by: Jani Monoses <jani@ubuntu.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Sabrina Dubroca [Thu, 6 Mar 2014 16:51:57 +0000 (17:51 +0100)]
ipv6: don't set DST_NOCOUNT for remotely added routes
commit
c88507fbad8055297c1d1e21e599f46960cbee39 upstream.
DST_NOCOUNT should only be used if an authorized user adds routes
locally. In case of routes which are added on behalf of router
advertisments this flag must not get used as it allows an unlimited
number of routes getting added remotely.
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
[bwh: Backported to 3.2: adjust context]
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Dave Kleikamp [Fri, 14 Mar 2014 15:42:01 +0000 (10:42 -0500)]
sparc64: don't treat 64-bit syscall return codes as 32-bit
[ Upstream commit
1535bd8adbdedd60a0ee62e28fd5225d66434371 ]
When checking a system call return code for an error,
linux_sparc_syscall was sign-extending the lower 32-bit value and
comparing it to -ERESTART_RESTARTBLOCK. lseek can return valid return
codes whose lower 32-bits alone would indicate a failure (such as 4G-1).
Use the whole 64-bit value to check for errors. Only the 32-bit path
should sign extend the lower 32-bit value.
Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Acked-by: Bob Picco <bob.picco@oracle.com>
Acked-by: Allen Pais <allen.pais@oracle.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: sparclinux@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Paul Gortmaker [Thu, 13 Feb 2014 18:57:44 +0000 (13:57 -0500)]
sparc32: fix build failure for arch_jump_label_transform
[ Upstream commit
4f6500fff5f7644a03c46728fd7ef0f62fa6940b ]
In arch/sparc/Kernel/Makefile, we see:
obj-$(CONFIG_SPARC64) += jump_label.o
However, the Kconfig selects HAVE_ARCH_JUMP_LABEL unconditionally
for all SPARC. This in turn leads to the following failure when
doing allmodconfig coverage builds:
kernel/built-in.o: In function `__jump_label_update':
jump_label.c:(.text+0x8560c): undefined reference to `arch_jump_label_transform'
kernel/built-in.o: In function `arch_jump_label_transform_static':
(.text+0x85cf4): undefined reference to `arch_jump_label_transform'
make: *** [vmlinux] Error 1
Change HAVE_ARCH_JUMP_LABEL to be conditional on SPARC64 so that it
matches the Makefile.
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Dave Kleikamp [Mon, 16 Dec 2013 21:01:00 +0000 (15:01 -0600)]
Revert "sparc64: Fix __copy_{to,from}_user_inatomic defines."
[ Upstream commit
16932237f2978a2265662f8de4af743b1f55a209 ]
This reverts commit
145e1c0023585e0e8f6df22316308ec61c5066b2.
This commit broke the behavior of __copy_from_user_inatomic when
it is only partially successful. Instead of returning the number
of bytes not copied, it now returns 1. This translates to the
wrong value being returned by iov_iter_copy_from_user_atomic.
xfstests generic/246 and LTP writev01 both fail on btrfs and nfs
because of this.
Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: sparclinux@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
oftedal [Fri, 18 Oct 2013 20:28:29 +0000 (22:28 +0200)]
sparc: PCI: Fix incorrect address calculation of PCI Bridge windows on Simba-bridges
[ Upstream commit
557fc5873ef178c4b3e1e36a42db547ecdc43f9b ]
The SIMBA APB Bridges lacks the 'ranges' of-property describing the
PCI I/O and memory areas located beneath the bridge. Faking this
information has been performed by reading range registers in the
APB bridge, and calculating the corresponding areas.
In commit
01f94c4a6ced476ce69b895426fc29bfc48c69bd
("Fix sabre pci controllers with new probing scheme.") a bug was
introduced into this calculation, causing the PCI memory areas
to be calculated incorrectly: The shift size was set to be
identical for I/O and MEM ranges, which is incorrect.
This patch set the shift size of the MEM range back to the
value used before
01f94c4a6ced476ce69b895426fc29bfc48c69bd.
Signed-off-by: Kjetil Oftedal <oftedal@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Sasha Levin [Sun, 30 Mar 2014 00:39:35 +0000 (20:39 -0400)]
rds: prevent dereference of a NULL device in rds_iw_laddr_check
[ Upstream commit
bf39b4247b8799935ea91d90db250ab608a58e50 ]
Binding might result in a NULL device which is later dereferenced
without checking.
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Dan Carpenter [Tue, 8 Apr 2014 09:23:09 +0000 (12:23 +0300)]
isdnloop: several buffer overflows
[ Upstream commit
7563487cbf865284dcd35e9ef5a95380da046737 ]
There are three buffer overflows addressed in this patch.
1) In isdnloop_fake_err() we add an 'E' to a 60 character string and
then copy it into a 60 character buffer. I have made the destination
buffer 64 characters and I'm changed the sprintf() to a snprintf().
2) In isdnloop_parse_cmd(), p points to a 6 characters into a 60
character buffer so we have 54 characters. The ->eazlist[] is 11
characters long. I have modified the code to return if the source
buffer is too long.
3) In isdnloop_command() the cbuf[] array was 60 characters long but the
max length of the string then can be up to 79 characters. I made the
cbuf array 80 characters long and changed the sprintf() to snprintf().
I also removed the temporary "dial" buffer and changed it to use "p"
directly.
Unfortunately, we pass the "cbuf" string from isdnloop_command() to
isdnloop_writecmd() which truncates anything over 60 characters to make
it fit in card->omsg[]. (It can accept values up to 255 characters so
long as there is a '\n' character every 60 characters). For now I have
just fixed the memory corruption bug and left the other problems in this
driver alone.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
YOSHIFUJI Hideaki / 吉藤英明 [Wed, 2 Apr 2014 03:48:42 +0000 (12:48 +0900)]
isdnloop: Validate NUL-terminated strings from user.
[ Upstream commit
77bc6bed7121936bb2e019a8c336075f4c8eef62 ]
Return -EINVAL unless all of user-given strings are correctly
NUL-terminated.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Pablo Neira [Tue, 1 Apr 2014 17:38:44 +0000 (19:38 +0200)]
netlink: don't compare the nul-termination in nla_strcmp
[ Upstream commit
8b7b932434f5eee495b91a2804f5b64ebb2bc835 ]
nla_strcmp compares the string length plus one, so it's implicitly
including the nul-termination in the comparison.
int nla_strcmp(const struct nlattr *nla, const char *str)
{
int len = strlen(str) + 1;
...
d = memcmp(nla_data(nla), str, len);
However, if NLA_STRING is used, userspace can send us a string without
the nul-termination. This is a problem since the string
comparison will not match as the last byte may be not the
nul-termination.
Fix this by skipping the comparison of the nul-termination if the
attribute data is nul-terminated. Suggested by Thomas Graf.
Cc: Florian Westphal <fw@strlen.de>
Cc: Thomas Graf <tgraf@suug.ch>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Hannes Frederic Sowa [Mon, 31 Mar 2014 18:14:10 +0000 (20:14 +0200)]
ipv6: some ipv6 statistic counters failed to disable bh
[ Upstream commit
43a43b6040165f7b40b5b489fe61a4cb7f8c4980 ]
After commit
c15b1ccadb323ea ("ipv6: move DAD and addrconf_verify
processing to workqueue") some counters are now updated in process context
and thus need to disable bh before doing so, otherwise deadlocks can
happen on 32-bit archs. Fabio Estevam noticed this while while mounting
a NFS volume on an ARM board.
As a compensation for missing this I looked after the other *_STATS_BH
and found three other calls which need updating:
1) icmp6_send: ip6_fragment -> icmpv6_send -> icmp6_send (error handling)
2) ip6_push_pending_frames: rawv6_sendmsg -> rawv6_push_pending_frames -> ...
(only in case of icmp protocol with raw sockets in error handling)
3) ping6_v6_sendmsg (error handling)
Fixes: c15b1ccadb323ea ("ipv6: move DAD and addrconf_verify processing to workqueue")
Reported-by: Fabio Estevam <festevam@gmail.com>
Tested-by: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Paul Durrant [Fri, 28 Mar 2014 11:39:05 +0000 (11:39 +0000)]
xen-netback: remove pointless clause from if statement
[ Upstream commit
0576eddf24df716d8570ef8ca11452a9f98eaab2 ]
This patch removes a test in start_new_rx_buffer() that checks whether
a copy operation is less than MAX_BUFFER_OFFSET in length, since
MAX_BUFFER_OFFSET is defined to be PAGE_SIZE and the only caller of
start_new_rx_buffer() already limits copy operations to PAGE_SIZE or less.
Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Cc: Ian Campbell <ian.campbell@citrix.com>
Cc: Wei Liu <wei.liu2@citrix.com>
Cc: Sander Eikelenboom <linux@eikelenboom.it>
Reported-By: Sander Eikelenboom <linux@eikelenboom.it>
Tested-By: Sander Eikelenboom <linux@eikelenboom.it>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Michael S. Tsirkin [Thu, 27 Mar 2014 10:53:37 +0000 (12:53 +0200)]
vhost: validate vhost_get_vq_desc return value
[ Upstream commit
a39ee449f96a2cd44ce056d8a0a112211a9b1a1f ]
vhost fails to validate negative error code
from vhost_get_vq_desc causing
a crash: we are using -EFAULT which is 0xfffffff2
as vector size, which exceeds the allocated size.
The code in question was introduced in commit
8dd014adfea6f173c1ef6378f7e5e7924866c923
vhost-net: mergeable buffers support
CVE-2014-0055
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Michael S. Tsirkin [Thu, 27 Mar 2014 10:00:26 +0000 (12:00 +0200)]
vhost: fix total length when packets are too short
[ Upstream commit
d8316f3991d207fe32881a9ac20241be8fa2bad0 ]
When mergeable buffers are disabled, and the
incoming packet is too large for the rx buffer,
get_rx_bufs returns success.
This was intentional in order for make recvmsg
truncate the packet and then handle_rx would
detect err != sock_len and drop it.
Unfortunately we pass the original sock_len to
recvmsg - which means we use parts of iov not fully
validated.
Fix this up by detecting this overrun and doing packet drop
immediately.
CVE-2014-0077
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
lucien [Mon, 17 Mar 2014 04:51:01 +0000 (12:51 +0800)]
ipv6: ip6_append_data_mtu do not handle the mtu of the second fragment properly
[ Upstream commit
e367c2d03dba4c9bcafad24688fadb79dd95b218 ]
In ip6_append_data_mtu(), when the xfrm mode is not tunnel(such as
transport),the ipsec header need to be added in the first fragment, so the mtu
will decrease to reserve space for it, then the second fragment come, the mtu
should be turn back, as the commit
0c1833797a5a6ec23ea9261d979aa18078720b74
said. however, in the commit
a493e60ac4bbe2e977e7129d6d8cbb0dd236be, it use
*mtu = min(*mtu, ...) to change the mtu, which lead to the new mtu is alway
equal with the first fragment's. and cannot turn back.
when I test through ping6 -c1 -s5000 $ip (mtu=1280):
...frag (0|1232) ESP(spi=0x00002000,seq=0xb), length 1232
...frag (1232|1216)
...frag (2448|1216)
...frag (3664|1216)
...frag (4880|164)
which should be:
...frag (0|1232) ESP(spi=0x00001000,seq=0x1), length 1232
...frag (1232|1232)
...frag (2464|1232)
...frag (3696|1232)
...frag (4928|116)
so delete the min() when change back the mtu.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Fixes: 75a493e60ac4bb ("ipv6: ip6_append_data_mtu did not care about pmtudisc and frag_size")
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Heiner Kallweit [Wed, 12 Mar 2014 21:13:19 +0000 (22:13 +0100)]
ipv6: Avoid unnecessary temporary addresses being generated
[ Upstream commit
ecab67015ef6e3f3635551dcc9971cf363cc1cd5 ]
tmp_prefered_lft is an offset to ifp->tstamp, not now. Therefore
age needs to be added to the condition.
Age calculation in ipv6_create_tempaddr is different from the one
in addrconf_verify and doesn't consider ADDRCONF_TIMER_FUZZ_MINUS.
This can cause age in ipv6_create_tempaddr to be less than the one
in addrconf_verify and therefore unnecessary temporary address to
be generated.
Use age calculation as in addrconf_modify to avoid this.
Signed-off-by: Heiner Kallweit <heiner.kallweit@web.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Matthew Leach [Tue, 11 Mar 2014 11:58:27 +0000 (11:58 +0000)]
net: socket: error on a negative msg_namelen
[ Upstream commit
dbb490b96584d4e958533fb637f08b557f505657 ]
When copying in a struct msghdr from the user, if the user has set the
msg_namelen parameter to a negative value it gets clamped to a valid
size due to a comparison between signed and unsigned values.
Ensure the syscall errors when the user passes in a negative value.
Signed-off-by: Matthew Leach <matthew.leach@arm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Peter Boström [Mon, 10 Mar 2014 15:17:15 +0000 (16:17 +0100)]
vlan: Set correct source MAC address with TX VLAN offload enabled
[ Upstream commit
dd38743b4cc2f86be250eaf156cf113ba3dd531a ]
With TX VLAN offload enabled the source MAC address for frames sent using the
VLAN interface is currently set to the address of the real interface. This is
wrong since the VLAN interface may be configured with a different address.
The bug was introduced in commit
2205369a314e12fcec4781cc73ac9c08fc2b47de
("vlan: Fix header ops passthru when doing TX VLAN offload.").
This patch sets the source address before calling the create function of the
real interface.
Signed-off-by: Peter Boström <peter.bostrom@netrounds.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Eric Dumazet [Wed, 26 Mar 2014 01:42:27 +0000 (18:42 -0700)]
net: unix: non blocking recvmsg() should not return -EINTR
[ Upstream commit
de1443916791d75fdd26becb116898277bb0273f ]
Some applications didn't expect recvmsg() on a non blocking socket
could return -EINTR. This possibility was added as a side effect
of commit
b3ca9b02b00704 ("net: fix multithreaded signal handling in
unix recv routines").
To hit this bug, you need to be a bit unlucky, as the u->readlock
mutex is usually held for very small periods.
Fixes: b3ca9b02b00704 ("net: fix multithreaded signal handling in unix recv routines")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Rainer Weikusat <rweikusat@mobileactivedefense.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Linus Lüssing [Tue, 4 Mar 2014 02:57:35 +0000 (03:57 +0100)]
bridge: multicast: add sanity check for query source addresses
[ Upstream commit
6565b9eeef194afbb3beec80d6dd2447f4091f8c ]
MLD queries are supposed to have an IPv6 link-local source address
according to RFC2710, section 4 and RFC3810, section 5.1.14. This patch
adds a sanity check to ignore such broken MLD queries.
Without this check, such malformed MLD queries can result in a
denial of service: The queries are ignored by any MLD listener
therefore they will not respond with an MLD report. However,
without this patch these malformed MLD queries would enable the
snooping part in the bridge code, potentially shutting down the
according ports towards these hosts for multicast traffic as the
bridge did not learn about these listeners.
Reported-by: Jan Stancek <jstancek@redhat.com>
Signed-off-by: Linus Lüssing <linus.luessing@web.de>
Reviewed-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Daniel Borkmann [Tue, 4 Mar 2014 15:35:51 +0000 (16:35 +0100)]
net: sctp: fix skb leakage in COOKIE ECHO path of chunk->auth_chunk
[ Upstream commit
c485658bae87faccd7aed540fd2ca3ab37992310 ]
While working on
ec0223ec48a9 ("net: sctp: fix sctp_sf_do_5_1D_ce to
verify if we/peer is AUTH capable"), we noticed that there's a skb
memory leakage in the error path.
Running the same reproducer as in
ec0223ec48a9 and by unconditionally
jumping to the error label (to simulate an error condition) in
sctp_sf_do_5_1D_ce() receive path lets kmemleak detector bark about
the unfreed chunk->auth_chunk skb clone:
Unreferenced object 0xffff8800b8f3a000 (size 256):
comm "softirq", pid 0, jiffies
4294769856 (age 110.757s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
89 ab 75 5e d4 01 58 13 00 00 00 00 00 00 00 00 ..u^..X.........
backtrace:
[<
ffffffff816660be>] kmemleak_alloc+0x4e/0xb0
[<
ffffffff8119f328>] kmem_cache_alloc+0xc8/0x210
[<
ffffffff81566929>] skb_clone+0x49/0xb0
[<
ffffffffa0467459>] sctp_endpoint_bh_rcv+0x1d9/0x230 [sctp]
[<
ffffffffa046fdbc>] sctp_inq_push+0x4c/0x70 [sctp]
[<
ffffffffa047e8de>] sctp_rcv+0x82e/0x9a0 [sctp]
[<
ffffffff815abd38>] ip_local_deliver_finish+0xa8/0x210
[<
ffffffff815a64af>] nf_reinject+0xbf/0x180
[<
ffffffffa04b4762>] nfqnl_recv_verdict+0x1d2/0x2b0 [nfnetlink_queue]
[<
ffffffffa04aa40b>] nfnetlink_rcv_msg+0x14b/0x250 [nfnetlink]
[<
ffffffff815a3269>] netlink_rcv_skb+0xa9/0xc0
[<
ffffffffa04aa7cf>] nfnetlink_rcv+0x23f/0x408 [nfnetlink]
[<
ffffffff815a2bd8>] netlink_unicast+0x168/0x250
[<
ffffffff815a2fa1>] netlink_sendmsg+0x2e1/0x3f0
[<
ffffffff8155cc6b>] sock_sendmsg+0x8b/0xc0
[<
ffffffff8155d449>] ___sys_sendmsg+0x369/0x380
What happens is that commit
bbd0d59809f9 clones the skb containing
the AUTH chunk in sctp_endpoint_bh_rcv() when having the edge case
that an endpoint requires COOKIE-ECHO chunks to be authenticated:
---------- INIT[RANDOM; CHUNKS; HMAC-ALGO] ---------->
<------- INIT-ACK[RANDOM; CHUNKS; HMAC-ALGO] ---------
------------------ AUTH; COOKIE-ECHO ---------------->
<-------------------- COOKIE-ACK ---------------------
When we enter sctp_sf_do_5_1D_ce() and before we actually get to
the point where we process (and subsequently free) a non-NULL
chunk->auth_chunk, we could hit the "goto nomem_init" path from
an error condition and thus leave the cloned skb around w/o
freeing it.
The fix is to centrally free such clones in sctp_chunk_destroy()
handler that is invoked from sctp_chunk_free() after all refs have
dropped; and also move both kfree_skb(chunk->auth_chunk) there,
so that chunk->auth_chunk is either NULL (since sctp_chunkify()
allocs new chunks through kmem_cache_zalloc()) or non-NULL with
a valid skb pointer. chunk->skb and chunk->auth_chunk are the
only skbs in the sctp_chunk structure that need to be handeled.
While at it, we should use consume_skb() for both. It is the same
as dev_kfree_skb() but more appropriately named as we are not
a device but a protocol. Also, this effectively replaces the
kfree_skb() from both invocations into consume_skb(). Functions
are the same only that kfree_skb() assumes that the frame was
being dropped after a failure (e.g. for tools like drop monitor),
usage of consume_skb() seems more appropriate in function
sctp_chunk_destroy() though.
Fixes: bbd0d59809f9 ("[SCTP]: Implement the receive and verification of AUTH chunk")
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Cc: Vlad Yasevich <yasevich@gmail.com>
Cc: Neil Horman <nhorman@tuxdriver.com>
Acked-by: Vlad Yasevich <vyasevich@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Ben Hutchings [Wed, 9 Apr 2014 01:20:47 +0000 (02:20 +0100)]
Linux 3.2.57
Martin Schwidefsky [Mon, 3 Feb 2014 16:37:15 +0000 (17:37 +0100)]
s390: fix kernel crash due to linkage stack instructions
commit
8d7f6690cedb83456edd41c9bd583783f0703bf0 upstream.
The kernel currently crashes with a low-address-protection exception
if a user space process executes an instruction that tries to use the
linkage stack. Set the base-ASTE origin and the subspace-ASTE origin
of the dispatchable-unit-control-table to point to a dummy ASTE.
Set up control register 15 to point to an empty linkage stack with no
room left.
A user space process with a linkage stack instruction will still crash
but with a different exception which is correctly translated to a
segmentation fault instead of a kernel oops.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Jeff Layton [Fri, 14 Feb 2014 12:20:35 +0000 (07:20 -0500)]
cifs: ensure that uncached writes handle unmapped areas correctly
commit
5d81de8e8667da7135d3a32a964087c0faf5483f upstream.
It's possible for userland to pass down an iovec via writev() that has a
bogus user pointer in it. If that happens and we're doing an uncached
write, then we can end up getting less bytes than we expect from the
call to iov_iter_copy_from_user. This is CVE-2014-0069
cifs_iovec_write isn't set up to handle that situation however. It'll
blindly keep chugging through the page array and not filling those pages
with anything useful. Worse yet, we'll later end up with a negative
number in wdata->tailsz, which will confuse the sending routines and
cause an oops at the very least.
Fix this by having the copy phase of cifs_iovec_write stop copying data
in this situation and send the last write as a short one. At the same
time, we want to avoid sending a zero-length write to the server, so
break out of the loop and set rc to -EFAULT if that happens. This also
allows us to handle the case where no address in the iovec is valid.
[Note: Marking this for stable on v3.4+ kernels, but kernels as old as
v2.6.38 may have a similar problem and may need similar fix]
Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru>
Reported-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
[bwh: Backported to 3.2:
- Adjust context
- s/nr_pages/npages/
- s/wdata->pages/pages/
- In case of an error with no data copied, we must kunmap() page 0,
but in neither case should we free anything else]
Thanks to Raphael Geissert for an independent backport that showed some
bugs in my first version.]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Marcelo Tosatti [Fri, 3 Jan 2014 19:00:51 +0000 (17:00 -0200)]
KVM: VMX: fix use after free of vmx->loaded_vmcs
commit
26a865f4aa8e66a6d94958de7656f7f1b03c6c56 upstream.
After free_loaded_vmcs executes, the "loaded_vmcs" structure
is kfreed, and now vmx->loaded_vmcs points to a kfreed area.
Subsequent free_loaded_vmcs then attempts to manipulate
vmx->loaded_vmcs.
Switch the order to avoid the problem.
https://bugzilla.redhat.com/show_bug.cgi?id=
1047892
Reviewed-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>