Greg Kroah-Hartman [Tue, 15 Sep 2009 17:46:05 +0000 (10:46 -0700)]
Linux 2.6.30.7
Mikulas Patocka [Fri, 4 Sep 2009 19:40:43 +0000 (20:40 +0100)]
dm snapshot: fix on disk chunk size validation
commit
ae0b7448e91353ea5f821601a055aca6b58042cd upstream.
Fix some problems seen in the chunk size processing when activating a
pre-existing snapshot.
For a new snapshot, the chunk size can either be supplied by the creator
or a default value can be used. For an existing snapshot, the
chunk size in the snapshot header on disk should always be used.
If someone attempts to load an existing snapshot and has the 'default
chunk size' option set, the kernel uses its default value even when it
is incorrect for the snapshot being loaded. This patch ensures the
correct on-disk value is always used.
Secondly, when the code does use the chunk size stored on the disk it is
prudent to revalidate it, so the code can exit cleanly if it got
corrupted as happened in
https://bugzilla.redhat.com/show_bug.cgi?id=461506 .
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Mikulas Patocka [Fri, 4 Sep 2009 19:40:41 +0000 (20:40 +0100)]
dm exception store: split set_chunk_size
commit
2defcc3fb4661e7351cb2ac48d843efc4c64db13 upstream.
Break the function set_chunk_size to two functions in preparation for
the fix in the following patch.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Mikulas Patocka [Fri, 4 Sep 2009 19:40:39 +0000 (20:40 +0100)]
dm snapshot: fix header corruption race on invalidation
commit
61578dcd3fafe6babd72e8db32110cc0b630a432 upstream.
If a persistent snapshot fills up, a race can corrupt the on-disk header
which causes a crash on any future attempt to activate the snapshot
(typically while booting). This patch fixes the race.
When the snapshot overflows, __invalidate_snapshot is called, which calls
snapshot store method drop_snapshot. It goes to persistent_drop_snapshot that
calls write_header. write_header constructs the new header in the "area"
location.
Concurrently, an existing kcopyd job may finish, call copy_callback
and commit_exception method, that goes to persistent_commit_exception.
persistent_commit_exception doesn't do locking, relying on the fact that
callbacks are single-threaded, but it can race with snapshot invalidation and
overwrite the header that is just being written while the snapshot is being
invalidated.
The result of this race is a corrupted header being written that can
lead to a crash on further reactivation (if chunk_size is zero in the
corrupted header).
The fix is to use separate memory areas for each.
See the bug: https://bugzilla.redhat.com/show_bug.cgi?id=461506
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Mikulas Patocka [Fri, 4 Sep 2009 19:40:37 +0000 (20:40 +0100)]
dm snapshot: refactor zero_disk_area to use chunk_io
commit
02d2fd31defce6ff77146ad0fef4f19006055d86 upstream.
Refactor chunk_io to prepare for the fix in the following patch.
Pass an area pointer to chunk_io and simplify zero_disk_area to use
chunk_io. No functional change.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Jonathan Brassow [Fri, 4 Sep 2009 19:40:32 +0000 (20:40 +0100)]
dm raid1: do not allow log_failure variable to unset after being set
commit
d2b698644c97cb033261536a4f2010924a00eac9 upstream.
This patch fixes a bug which was triggering a case where the primary leg
could not be changed on failure even when the mirror was in-sync.
The case involves the failure of the primary device along with
the transient failure of the log device. The problem is that
bios can be put on the 'failures' list (due to log failure)
before 'fail_mirror' is called due to the primary device failure.
Normally, this is fine, but if the log device failure is transient,
a subsequent iteration of the work thread, 'do_mirror', will
reset 'log_failure'. The 'do_failures' function then resets
the 'in_sync' variable when processing bios on the failures list.
The 'in_sync' variable is what is used to determine if the
primary device can be switched in the event of a failure. Since
this has been reset, the primary device is incorrectly assumed
to be not switchable.
The case has been seen in the cluster mirror context, where one
machine realizes the log device is dead before the other machines.
As the responsibilities of the server migrate from one node to
another (because the mirror is being reconfigured due to the failure),
the new server may think for a moment that the log device is fine -
thus resetting the 'log_failure' variable.
In any case, it is inappropiate for us to reset the 'log_failure'
variable. The above bug simply illustrates that it can actually
hurt us.
Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Clemens Ladisch [Tue, 1 Sep 2009 06:23:58 +0000 (08:23 +0200)]
sound: oxygen: fix MCLK rate for 192 kHz playback
commit
b91ab72b830e1494c2c7f8de05ccb2ab2c9cfb26 upstream.
Do not forget to program the MCLK ratio for the I2S output.
Otherwise, the master clock frequency can be too high for
the DACs at sample frequencies above 96 kHz.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Clemens Ladisch [Wed, 2 Sep 2009 16:25:39 +0000 (18:25 +0200)]
sound: oxygen: handle cards with missing EEPROM
commit
92653453c3015c083b9fe0ad48261c6b2267d482 upstream.
The card model detection code introduced in 2.6.30 that tries to work
around partially broken EEPROM contents by reading the EEPROM directly
does not handle cards where the EEPROM has been omitted. In this case,
we have to use the default ID to allow the driver to load.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Reported-and-tested-by: Ozan Çağlayan <ozan@pardus.org.tr>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
James Bottomley [Tue, 26 May 2009 20:35:48 +0000 (20:35 +0000)]
SCSI: sd: fix bug in SCSI async probing
commit
601e7638254c118fca135af9b1a9f35061420f62 upstream.
The async split up of probing in sd.c created a potential failure case where
something goes wrong with device_add(), but which we don't recover properly.
Since, in general, asynchronous error handling is hard, move the device_add()
into the asynchronous path (it should be fast) and make sure all the deferred
processing cannot fail.
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Chris Wright [Fri, 28 Aug 2009 20:00:06 +0000 (13:00 -0700)]
PCI SR-IOV: correct broken resource alignment calculations
commit
6faf17f6f1ffc586d16efc2f9fa2083a7785ee74 upstream.
An SR-IOV capable device includes an SR-IOV PCIe capability which
describes the Virtual Function (VF) BAR requirements. A typical SR-IOV
device can support multiple VFs whose BARs must be in a contiguous region,
effectively an array of VF BARs. The BAR reports the size requirement
for a single VF. We calculate the full range needed by simply multiplying
the VF BAR size with the number of possible VFs and create a resource
spanning the full range.
This all seems sane enough except it artificially inflates the alignment
requirement for the VF BAR. The VF BAR need only be aligned to the size
of a single BAR not the contiguous range of VF BARs. This can cause us
to fail to allocate resources for the BAR despite the fact that we
actually have enough space.
This patch adds a thin PCI specific layer over the generic
resource_alignment() function which is aware of the special nature of
VF BARs and does sorting and allocation based on the smaller alignment
requirement.
I recognize that while resource_alignment is generic, it's basically a
PCI helper. An alternative to this patch is to add PCI VF BAR specific
information to struct resource. I opted for the extra layer rather than
adding such PCI specific information to struct resource. This does
have the slight downside that we don't cache the BAR size and re-read
for each alignment query (happens a small handful of times during boot
for each VF BAR).
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matthew Wilcox <matthew@wil.cx>
Cc: Yu Zhao <yu.zhao@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Ryusuke Konishi [Sat, 29 Aug 2009 19:21:41 +0000 (04:21 +0900)]
nilfs2: fix preempt count underflow in nilfs_btnode_prepare_change_key
commit
b1f1b8ce0a1d71cbc72f7540134d52b79bd8f5ac upstream.
This will fix the following preempt count underflow reported from
users with the title "[NILFS users] segctord problem" (Message-ID:
<949415.6494.qm@web58808.mail.re1.yahoo.com> and Message-ID:
<debc30fc0908270825v747c1734xa59126623cfd5b05@mail.gmail.com>):
WARNING: at kernel/sched.c:4890 sub_preempt_count+0x95/0xa0()
Hardware name: HP Compaq 6530b (KR980UT#ABC)
Modules linked in: bridge stp llc bnep rfcomm l2cap xfs exportfs nilfs2 cowloop loop vboxnetadp vboxnetflt vboxdrv btusb bluetooth uvcvideo videodev v4l1_compat v4l2_compat_ioctl32 arc4 snd_hda_codec_analog ecb iwlagn iwlcore rfkill lib80211 mac80211 snd_hda_intel snd_hda_codec ehci_hcd uhci_hcd usbcore snd_hwdep snd_pcm tg3 cfg80211 psmouse snd_timer joydev libphy ohci1394 snd_page_alloc hp_accel lis3lv02d ieee1394 led_class i915 drm i2c_algo_bit video backlight output i2c_core dm_crypt dm_mod
Pid: 4197, comm: segctord Not tainted 2.6.30-gentoo-r4-64 #7
Call Trace:
[<
ffffffff8023fa05>] ? sub_preempt_count+0x95/0xa0
[<
ffffffff802470f8>] warn_slowpath_common+0x78/0xd0
[<
ffffffff8024715f>] warn_slowpath_null+0xf/0x20
[<
ffffffff8023fa05>] sub_preempt_count+0x95/0xa0
[<
ffffffffa04ce4db>] nilfs_btnode_prepare_change_key+0x11b/0x190 [nilfs2]
[<
ffffffffa04d01ad>] nilfs_btree_assign_p+0x19d/0x1e0 [nilfs2]
[<
ffffffffa04d10ad>] nilfs_btree_assign+0xbd/0x130 [nilfs2]
[<
ffffffffa04cead7>] nilfs_bmap_assign+0x47/0x70 [nilfs2]
[<
ffffffffa04d9bc6>] nilfs_segctor_do_construct+0x956/0x20f0 [nilfs2]
[<
ffffffff805ac8e2>] ? _spin_unlock_irqrestore+0x12/0x40
[<
ffffffff803c06e0>] ? __up_write+0xe0/0x150
[<
ffffffff80262959>] ? up_write+0x9/0x10
[<
ffffffffa04ce9f3>] ? nilfs_bmap_test_and_clear_dirty+0x43/0x60 [nilfs2]
[<
ffffffffa04cd627>] ? nilfs_mdt_fetch_dirty+0x27/0x60 [nilfs2]
[<
ffffffffa04db5fc>] nilfs_segctor_construct+0x8c/0xd0 [nilfs2]
[<
ffffffffa04dc3dc>] nilfs_segctor_thread+0x15c/0x3a0 [nilfs2]
[<
ffffffffa04dbe20>] ? nilfs_construction_timeout+0x0/0x10 [nilfs2]
[<
ffffffff80252633>] ? add_timer+0x13/0x20
[<
ffffffff802370da>] ? __wake_up_common+0x5a/0x90
[<
ffffffff8025e960>] ? autoremove_wake_function+0x0/0x40
[<
ffffffffa04dc280>] ? nilfs_segctor_thread+0x0/0x3a0 [nilfs2]
[<
ffffffffa04dc280>] ? nilfs_segctor_thread+0x0/0x3a0 [nilfs2]
[<
ffffffff8025e556>] kthread+0x56/0x90
[<
ffffffff8020cdea>] child_rip+0xa/0x20
[<
ffffffff8025e500>] ? kthread+0x0/0x90
[<
ffffffff8020cde0>] ? child_rip+0x0/0x20
This problem was caused due to a missing radix_tree_preload() call in
the retry path of nilfs_btnode_prepare_change_key() function.
Reported-by: Eric A <eric225125@yahoo.com>
Reported-by: Jerome Poulin <jeromepoulin@gmail.com>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Tested-by: Jerome Poulin <jeromepoulin@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Eric Dumazet [Thu, 3 Sep 2009 19:38:59 +0000 (22:38 +0300)]
slub: Fix kmem_cache_destroy() with SLAB_DESTROY_BY_RCU
commit
d76b1590e06a63a3d8697168cd0aabf1c4b3cb3a upstream.
kmem_cache_destroy() should call rcu_barrier() *after* kmem_cache_close() and
*before* sysfs_slab_remove() or risk rcu_free_slab() being called after
kmem_cache is deleted (kfreed).
rmmod nf_conntrack can crash the machine because it has to kmem_cache_destroy()
a SLAB_DESTROY_BY_RCU enabled cache.
Reported-by: Zdenek Kabelac <zdenek.kabelac@gmail.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Massimo Cirillo [Thu, 27 Aug 2009 08:44:09 +0000 (10:44 +0200)]
JFFS2: add missing verify buffer allocation/deallocation
commit
bc8cec0dff072f1a45ce7f6b2c5234bb3411ac51 upstream.
The function jffs2_nor_wbuf_flash_setup() doesn't allocate the verify buffer
if CONFIG_JFFS2_FS_WBUF_VERIFY is defined, so causing a kernel panic when
that macro is enabled and the verify function is called. Similarly the
jffs2_nor_wbuf_flash_cleanup() must free the buffer if
CONFIG_JFFS2_FS_WBUF_VERIFY is enabled.
The following patch fixes the problem.
The following patch applies to 2.6.30 kernel.
Signed-off-by: Massimo Cirillo <maxcir@gmail.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Mathieu Desnoyers [Wed, 19 Aug 2009 03:16:55 +0000 (20:16 -0700)]
sparc: sys32.S incorrect compat-layer splice() system call
[ Upstream commit
e2c6cbd9ace61039d3de39e717195e38f1492aee ]
I think arch/sparc/kernel/sys32.S has an incorrect splice definition:
SIGN2(sys32_splice, sys_splice, %o0, %o1)
The splice() prototype looks like :
long splice(int fd_in, loff_t *off_in, int fd_out,
loff_t *off_out, size_t len, unsigned int flags);
So I think we should have :
SIGN2(sys32_splice, sys_splice, %o0, %o2)
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
David S. Miller [Fri, 4 Sep 2009 10:38:54 +0000 (03:38 -0700)]
sparc64: Fix bootup with mcount in some configs.
[ Upstream commit
bd4352cadfacb9084c97c853b025fac010266c26 ]
Functions invoked early when booting up a cpu can't use
tracing because mcount requires a valid 'current_thread_info()'
and TLB mappings to be setup.
The code path of sun4v_register_mondo_queues --> register_one_mondo
is one such case. sun4v_register_mondo_queues already has the
necessary 'notrace' annotation, but register_one_mondo does not.
Normally register_one_mondo is inlined so the bug doesn't trigger,
but with some config/compiler combinations, it won't be so we
must properly mark it notrace.
While we're here, add 'notrace' annoations to prom_printf and
prom_halt so that early error handling won't have the same problem.
Reported-by: Alexander Beregalov <a.beregalov@gmail.com>
Reported-by: Leif Sawyer <lsawyer@gci.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
David S. Miller [Tue, 25 Aug 2009 23:47:46 +0000 (16:47 -0700)]
sparc64: Validate linear D-TLB misses.
[ Upstream commit
d8ed1d43e17898761c7221014a15a4c7501d2ff3 ]
When page alloc debugging is not enabled, we essentially accept any
virtual address for linear kernel TLB misses. But with kgdb, kernel
address probing, and other facilities we can try to access arbitrary
crap.
So, make sure the address we miss on will translate to physical memory
that actually exists.
In order to make this work we have to embed the valid address bitmap
into the kernel image. And in order to make that less expensive we
make an adjustment, in that the max physical memory address is
decreased to "1 << 41", even on the chips that support a 42-bit
physical address space. We can do this because bit 41 indicates
"I/O space" and thus covers non-memory ranges.
The result of this is that:
1) kpte_linear_bitmap shrinks from 2K to 1K in size
2) we need 64K more for the valid address bitmap
We can't let the valid address bitmap be dynamically allocated
once we start using it to validate TLB misses, otherwise we have
crazy issues to deal with wrt. recursive TLB misses and such.
If we're in a TLB miss it could be the deepest trap level that's legal
inside of the cpu. So if we TLB miss referencing the bitmap, the cpu
will be out of trap levels and enter RED state.
To guard against out-of-range accesses to the bitmap, we have to check
to make sure no bits in the physical address above bit 40 are set. We
could export and use last_valid_pfn for this check, but that's just an
unnecessary extra memory reference.
On the plus side of all this, since we load all of these translations
into the special 4MB mapping TSB, and we check the TSB first for TLB
misses, there should be absolutely no real cost for these new checks
in the TLB miss path.
Reported-by: heyongli@gmail.com
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
David S. Miller [Thu, 3 Sep 2009 09:35:20 +0000 (02:35 -0700)]
sparc64: Kill spurious NMI watchdog triggers by increasing limit to 30 seconds.
[ Upstream commit
e6617c6ec28a17cf2f90262b835ec05b9b861400 ]
This is a compromise and a temporary workaround for bootup NMI
watchdog triggers some people see with qla2xxx devices present.
This happens when, for example:
CPU 0 is in the driver init and looping submitting mailbox commands to
load the firmware, then waiting for completion.
CPU 1 is receiving the device interrupts. CPU 1 is where the NMI
watchdog triggers.
CPU 0 is submitting mailbox commands fast enough that by the time CPU
1 returns from the device interrupt handler, a new one is pending.
This sequence runs for more than 5 seconds.
The problematic case is CPU 1's timer interrupt running when the
barrage of device interrupts begin. Then we have:
timer interrupt
return for softirq checking
pending, thus enable interrupts
qla2xxx interrupt
return
qla2xxx interrupt
return
... 5+ seconds pass
final qla2xxx interrupt for fw load
return
run timer softirq
return
At some point in the multi-second qla2xxx interrupt storm we trigger
the NMI watchdog on CPU 1 from the NMI interrupt handler.
The timer softirq, once we get back to running it, is smart enough to
run the timer work enough times to make up for the missed timer
interrupts.
However, the NMI watchdogs (both x86 and sparc) use the timer
interrupt count to notice the cpu is wedged. But in the above
scenerio we'll receive only one such timer interrupt even if we last
all the way back to running the timer softirq.
The default watchdog trigger point is only 5 seconds, which is pretty
low (the softwatchdog triggers at 60 seconds). So increase it to 30
seconds for now.
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Eric Dumazet [Tue, 28 Jul 2009 02:36:15 +0000 (02:36 +0000)]
net: net_assign_generic() fix
[ Upstream commit
144586301f6af5ae5943a002f030d8c626fa4fdd ]
memcpy() should take into account size of pointers,
not only number of pointers to copy.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Eric Dumazet [Tue, 28 Jul 2009 03:47:39 +0000 (03:47 +0000)]
pppol2tp: calls unregister_pernet_gen_device() at unload time
[ Upstream commit
446e72f30eca76d6f9a1a54adf84d2c6ba2831f8 ]
Failure to call unregister_pernet_gen_device() can exhaust memory
if module is loaded/unloaded many times.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Ben McKeegan [Tue, 28 Jul 2009 07:43:57 +0000 (07:43 +0000)]
ppp: fix lost fragments in ppp_mp_explode() (resubmit)
[ Upstream commit
a53a8b56827cc429c6d9f861ad558beeb5f6103f ]
This patch fixes the corner cases where the sum of MTU of the free
channels (adjusted for fragmentation overheads) is less than the MTU
of PPP link. There are at least 3 situations where this case might
arise:
- some of the channels are busy
- the multilink session is running in a degraded state (i.e. with less
than its full complement of active channels)
- by design, where multilink protocol is being used to artificially
increase the effective link MTU of a single link.
Without this patch, at most 1 fragment is ever sent per free channel
for a given PPP frame and any remaining part of the PPP frame that
does not fit into those fragments is silently discarded.
This patch restores the original behaviour which was broken by commit
9c705260feea6ae329bc6b6d5f6d2ef0227eda0a 'ppp:ppp_mp_explode()
redesign'. Once all 'free' channels have been given a fragment, an
additional fragment is queued to each available channel in turn, as many
times as necessary, until the entire PPP frame has been consumed.
Signed-off-by: Ben McKeegan <ben@netservers.co.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Tom Goff [Fri, 14 Aug 2009 23:33:56 +0000 (16:33 -0700)]
gre: Fix MTU calculation for bound GRE tunnels
[ Upstream commit
8cdb045632e5ee22854538619ac6f150eb0a4894 ]
The GRE header length should be subtracted when the tunnel MTU is
calculated. This just corrects for the associativity change
introduced by commit
42aa916265d740d66ac1f17290366e9494c884c2
("gre: Move MTU setting out of ipgre_tunnel_bind_dev").
Signed-off-by: Tom Goff <thomas.goff@boeing.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Krzysztof Hałasa [Mon, 24 Aug 2009 02:02:13 +0000 (19:02 -0700)]
E100: fix interaction with swiotlb on X86.
[ Upstream commit
6ff9c2e7fa8ca63a575792534b63c5092099c286 ]
E100 places it's RX packet descriptors inside skb->data and uses them
with bidirectional streaming DMA mapping. Data in descriptors is
accessed simultaneously by the chip (writing status and size when
a packet is received) and CPU (reading to check if the packet was
received). This isn't a valid usage of PCI DMA API, which requires use
of the coherent (consistent) memory for such purpose. Unfortunately e100
chips working in "simplified" RX mode have to store received data
directly after the descriptor. Fixing the driver to conform to the API
would require using unsupported "flexible" RX mode or receiving data
into a coherent memory and using CPU to copy it to network buffers.
This patch, while not yet making the driver conform to the PCI DMA API,
allows it to work correctly on X86 with swiotlb (while not breaking
other architectures).
Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Wei Yongjun [Tue, 4 Aug 2009 21:44:39 +0000 (21:44 +0000)]
dccp: missing destroy of percpu counter variable while unload module
[ Upstream commit
476181cb05c6a3aea3ef42309388e255c934a06f ]
percpu counter dccp_orphan_count is init in dccp_init() by
percpu_counter_init() while dccp module is loaded, but the
destroy of it is missing while dccp module is unloaded. We
can get the kernel WARNING about this. Reproduct by the
following commands:
$ modprobe dccp
$ rmmod dccp
$ modprobe dccp
WARNING: at lib/list_debug.c:26 __list_add+0x27/0x5c()
Hardware name: VMware Virtual Platform
list_add corruption. next->prev should be prev (
c080c0c4), but was (null). (next
=
ca7188cc).
Modules linked in: dccp(+) nfsd lockd nfs_acl auth_rpcgss exportfs sunrpc
Pid: 1956, comm: modprobe Not tainted 2.6.31-rc5 #55
Call Trace:
[<
c042f8fa>] warn_slowpath_common+0x6a/0x81
[<
c053a6cb>] ? __list_add+0x27/0x5c
[<
c042f94f>] warn_slowpath_fmt+0x29/0x2c
[<
c053a6cb>] __list_add+0x27/0x5c
[<
c053c9b3>] __percpu_counter_init+0x4d/0x5d
[<
ca9c90c7>] dccp_init+0x19/0x2ed [dccp]
[<
c0401141>] do_one_initcall+0x4f/0x111
[<
ca9c90ae>] ? dccp_init+0x0/0x2ed [dccp]
[<
c06971b5>] ? notifier_call_chain+0x26/0x48
[<
c0444943>] ? __blocking_notifier_call_chain+0x45/0x51
[<
c04516f7>] sys_init_module+0xac/0x1bd
[<
c04028e4>] sysenter_do_call+0x12/0x22
Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Greg Kroah-Hartman [Wed, 9 Sep 2009 03:39:34 +0000 (20:39 -0700)]
Linux 2.6.30.6
Sunil Mushran [Fri, 4 Sep 2009 18:12:01 +0000 (11:12 -0700)]
ocfs2: ocfs2_write_begin_nolock() should handle len=0
commit
8379e7c46cc48f51197dd663fc6676f47f2a1e71 upstream.
Bug introduced by mainline commit
e7432675f8ca868a4af365759a8d4c3779a3d922
The bug causes ocfs2_write_begin_nolock() to oops when len=0.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Jiri Slaby [Mon, 24 Aug 2009 05:55:51 +0000 (22:55 -0700)]
NET: llc, zero sockaddr_llc struct
commit
28e9fc592cb8c7a43e4d3147b38be6032a0e81bc upstream.
sllc_arphrd member of sockaddr_llc might not be changed. Zero sllc
before copying to the above layer's structure.
Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Eric Dumazet [Thu, 6 Aug 2009 03:34:06 +0000 (03:34 +0000)]
rose: Fix rose_getname() leak
commit
17ac2e9c58b69a1e25460a568eae1b0dc0188c25 upstream.
rose_getname() can leak kernel memory to user.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Eric Dumazet [Thu, 6 Aug 2009 03:48:36 +0000 (03:48 +0000)]
econet: Fix econet_getname() leak
commit
80922bbb12a105f858a8f0abb879cb4302d0ecaa upstream.
econet_getname() can leak kernel memory to user.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Eric Dumazet [Thu, 6 Aug 2009 03:31:07 +0000 (03:31 +0000)]
netrom: Fix nr_getname() leak
commit
f6b97b29513950bfbf621a83d85b6f86b39ec8db upstream.
nr_getname() can leak kernel memory to user.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Eric Dumazet [Thu, 6 Aug 2009 02:27:43 +0000 (02:27 +0000)]
appletalk: fix atalk_getname() leak
commit
3d392475c873c10c10d6d96b94d092a34ebd4791 upstream.
atalk_getname() can leak 8 bytes of kernel memory to user
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Eric Dumazet [Thu, 6 Aug 2009 03:55:04 +0000 (03:55 +0000)]
irda: Fix irda_getname() leak
commit
09384dfc76e526c3993c09c42e016372dc9dd22c upstream.
irda_getname() can leak kernel memory to user.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Eric Dumazet [Thu, 6 Aug 2009 20:27:04 +0000 (20:27 +0000)]
can: Fix raw_getname() leak
commit
e84b90ae5eb3c112d1f208964df1d8156a538289 upstream.
raw_getname() can leak 10 bytes of kernel memory to user
(two bytes hole between can_family and can_ifindex,
8 bytes at the end of sockaddr_can structure)
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Oliver Hartkopp <oliver@hartkopp.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Michal Schmidt [Thu, 27 Aug 2009 19:22:43 +0000 (12:22 -0700)]
xenfb: connect to backend before registering fb
commit
0a80fb10239b04c45e5e80aad8d4b2ca5ac407b2 upstream.
As soon as the framebuffer is registered, our methods may be called by the
kernel. This leads to a crash as xenfb_refresh() gets called before we have
the irq.
Connect to the backend before registering our framebuffer with the kernel.
[ Fixes bug http://bugzilla.kernel.org/show_bug.cgi?id=14059 ]
Signed-off-by: Michal Schmidt <mschmidt@redhat.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Dan Carpenter [Sun, 9 Aug 2009 12:24:09 +0000 (14:24 +0200)]
ar9170: fix read & write outside array bounds
commit
e9d126cdfa60b575f1b5b02024c4faee27dccf07 upstream.
Backport done by Christian Lamparter <chunkeey@googlemail.com>
queue == __AR9170_NUM_TXQ would cause a bug on the next line.
found by Smatch ( http://repo.or.cz/w/smatch.git ).
Reported-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Christian Lamparter <chunkeey@web.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Julien TINNES [Thu, 27 Aug 2009 13:26:58 +0000 (15:26 +0200)]
ipv4: make ip_append_data() handle NULL routing table
commit
788d908f2879a17e5f80924f3da2e23f1034482d upstream.
Add a check in ip_append_data() for NULL *rtp to prevent future bugs in
callers from being exploitable.
Signed-off-by: Julien Tinnes <julien@cr0.org>
Signed-off-by: Tavis Ormandy <taviso@sdf.lonestar.org>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Geert Uytterhoeven [Sun, 23 Aug 2009 22:54:32 +0000 (22:54 +0000)]
powerpc/ps3: Add missing check for PS3 to rtc-ps3 platform device registration
commit
7b6a09f3d6aedeaac923824af2a5df30300b56e9 upstream.
On non-PS3, we get:
| kernel BUG at drivers/rtc/rtc-ps3.c:36!
because the rtc-ps3 platform device is registered unconditionally in a kernel
with builtin support for PS3.
Reported-by: Sachin Sant <sachinp@in.ibm.com>
Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Acked-by: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Alan Stern [Fri, 31 Jul 2009 14:40:22 +0000 (10:40 -0400)]
USB: EHCI: fix two new bugs related to Clear-TT-Buffer
commit
7a0f0d951273eee889c2441846842348ebc00a2a upstream.
This patch (as1273) fixes two(!) bugs introduced by the new
Clear-TT-Buffer implementation in ehci-hcd.
It is now possible for an idle QH to have some URBs on its
queue -- this will happen if a Clear-TT-Buffer is pending for
the QH's endpoint. Consequently we should not issue a warning
when someone tries to unlink an URB from an idle QH; instead
we should process the request immediately.
The refcounts for QHs could get messed up, because
submit_async() would increment the refcount when calling
qh_link_async() and qh_link_async() would then refuse to link
the QH into the schedule if a Clear-TT-Buffer was pending.
Instead we should increment the refcount only when the QH
actually is added to the schedule. The current code tries to
be clever by leaving the refcount alone if an unlink is
immediately followed by a relink; the patch changes this to an
unconditional decrement and increment (although they occur in
the opposite order).
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
CC: David Brownell <david-b@pacbell.net>
Tested-by: Manuel Lauss <manuel.lauss@gmail.com>
Tested-by: Matthijs Kooijman <matthijs@stdin.nl>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Alan Stern [Mon, 29 Jun 2009 14:47:30 +0000 (10:47 -0400)]
USB: EHCI: use the new clear_tt_buffer interface
commit
914b701280a76f96890ad63eb0fa99bf204b961c upstream.
This patch (as1256) changes ehci-hcd and all the other drivers in the
EHCI family to make use of the new clear_tt_buffer callbacks. When a
Clear-TT-Buffer request is in progress for a QH, the QH is not allowed
to be linked into the async schedule until the request is finished.
At that time, if there are any URBs queued for the QH, it is linked
into the async schedule.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Alan Stern [Mon, 29 Jun 2009 14:43:32 +0000 (10:43 -0400)]
USB: fix the clear_tt_buffer interface
commit
cb88a1b887bb8908f6e00ce29e893ea52b074940 upstream.
This patch (as1255) updates the interface for calling
usb_hub_clear_tt_buffer(). Even the name of the function is changed!
When an async URB (i.e., Control or Bulk) going through a high-speed
hub to a non-high-speed device is cancelled or fails, the hub's
Transaction Translator buffer may be left busy still trying to
complete the transaction. The buffer has to be cleared; that's what
usb_hub_clear_tt_buffer() does.
It isn't safe to send any more URBs to the same endpoint until the TT
buffer is fully clear. Therefore the HCD needs to be told when the
Clear-TT-Buffer request has finished. This patch adds a callback
method to struct hc_driver for that purpose, and makes the hub driver
invoke the callback at the proper time.
The patch also changes a couple of names; "hub_tt_kevent" and
"tt.kevent" now look rather antiquated.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Bruno Prémont [Mon, 24 Aug 2009 02:06:28 +0000 (19:06 -0700)]
ipv6: Fix commit
63d9950b08184e6531adceb65f64b429909cc101 (ipv6: Make v4-mapped bindings consistent with IPv4)
commit
ca6982b858e1d08010c1d29d8e8255b2ac2ad70a upstream.
Commit
63d9950b08184e6531adceb65f64b429909cc101
(ipv6: Make v4-mapped bindings consistent with IPv4)
changes behavior of inet6_bind() for v4-mapped addresses so it should
behave the same way as inet_bind().
During this change setting of err to -EADDRNOTAVAIL got lost:
af_inet.c:469 inet_bind()
err = -EADDRNOTAVAIL;
if (!sysctl_ip_nonlocal_bind &&
!(inet->freebind || inet->transparent) &&
addr->sin_addr.s_addr != htonl(INADDR_ANY) &&
chk_addr_ret != RTN_LOCAL &&
chk_addr_ret != RTN_MULTICAST &&
chk_addr_ret != RTN_BROADCAST)
goto out;
af_inet6.c:463 inet6_bind()
if (addr_type == IPV6_ADDR_MAPPED) {
int chk_addr_ret;
/* Binding to v4-mapped address on a v6-only socket
* makes no sense
*/
if (np->ipv6only) {
err = -EINVAL;
goto out;
}
/* Reproduce AF_INET checks to make the bindings consitant */
v4addr = addr->sin6_addr.s6_addr32[3];
chk_addr_ret = inet_addr_type(net, v4addr);
if (!sysctl_ip_nonlocal_bind &&
!(inet->freebind || inet->transparent) &&
v4addr != htonl(INADDR_ANY) &&
chk_addr_ret != RTN_LOCAL &&
chk_addr_ret != RTN_MULTICAST &&
chk_addr_ret != RTN_BROADCAST)
goto out;
} else {
Signed-off-by: Bruno Prémont <bonbons@linux-vserver.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Oleg Nesterov [Mon, 24 Aug 2009 10:45:29 +0000 (12:45 +0200)]
kthreads: fix kthread_create() vs kthread_stop() race
The bug should be "accidently" fixed by recent changes in 2.6.31,
all kernels <= 2.6.30 need the fix. The problem was never noticed before,
it was found because it causes mysterious failures with GFS mount/umount.
Credits to Robert Peterson. He blaimed kthread.c from the very beginning.
But, despite my promise, I forgot to inspect the old implementation until
he did a lot of testing and reminded me. This led to huge delay in fixing
this bug.
kthread_stop() does put_task_struct(k) before it clears kthread_stop_info.k.
This means another kthread_create() can re-use this task_struct, but the
new kthread can still see kthread_should_stop() == T and exit even without
calling threadfn().
Reported-by: Robert Peterson <rpeterso@redhat.com>
Tested-by: Robert Peterson <rpeterso@redhat.com>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Jean-Francois Moine [Wed, 19 Aug 2009 21:46:18 +0000 (17:46 -0400)]
gspca - ov534: Fix ov772x
The scan of the image packets of the sensor ov772x was broken when
the sensor ov965x was added.
[ Based on upstream
c874f3aa, modified slightly for v2.6.30.5 ]
Signed-off-by: Jim Paris <jim@jtan.com>
Acked-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Christoph Hellwig [Wed, 19 Aug 2009 18:43:02 +0000 (14:43 -0400)]
xfs: fix spin_is_locked assert on uni-processor builds
upstream commit
a8914f3a6d72c97328597a556a99daaf5cc288ae
Without SMP or preemption spin_is_locked always returns false,
so we can't do an assert with it. Instead use assert_spin_locked,
which does the right thing on all builds.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Eric Sandeen <sandeen@sandeen.net>
Reported-by: Johannes Engel <jcnengel@googlemail.com>
Tested-by: Johannes Engel <jcnengel@googlemail.com>
Signed-off-by: Felix Blyakher <felixb@sgi.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Christoph Hellwig [Wed, 19 Aug 2009 18:43:01 +0000 (14:43 -0400)]
xfs: fix freeing of inodes not yet added to the inode cache
upstream commit
b36ec0428a06fcbdb67d61e9e664154e5dd9a8c7
When freeing an inode that lost race getting added to the inode cache we
must not call into ->destroy_inode, because that would delete the inode
that won the race from the inode cache radix tree.
This patch uses splits a new xfs_inode_free helper out of xfs_ireclaim
and uses that plus __destroy_inode to make sure we really only free
the memory allocted for the inode that lost the race, and not mess with
the inode cache state.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Eric Sandeen <sandeen@sandeen.net>
Reported-by: Alex Samad <alex@samad.com.au>
Reported-by: Andrew Randrianasulu <randrik@mail.ru>
Reported-by: Stephane <sharnois@max-t.com>
Reported-by: Tommy <tommy@news-service.com>
Reported-by: Miah Gregory <mace@darksilence.net>
Reported-by: Gabriel Barazer <gabriel@oxeva.fr>
Reported-by: Leandro Lucarella <llucax@gmail.com>
Reported-by: Daniel Burr <dburr@fami.com.au>
Reported-by: Nickolay <newmail@spaces.ru>
Reported-by: Michael Guntsche <mike@it-loops.com>
Reported-by: Dan Carley <dan.carley+linuxkern-bugs@gmail.com>
Reported-by: Michael Ole Olsen <gnu@gmx.net>
Reported-by: Michael Weissenbacher <mw@dermichi.com>
Reported-by: Martin Spott <Martin.Spott@mgras.net>
Reported-by: Christian Kujau <lists@nerdbynature.de>
Tested-by: Michael Guntsche <mike@it-loops.com>
Tested-by: Dan Carley <dan.carley+linuxkern-bugs@gmail.com>
Tested-by: Christian Kujau <lists@nerdbynature.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Christoph Hellwig [Wed, 19 Aug 2009 18:43:00 +0000 (14:43 -0400)]
vfs: add __destroy_inode
backport of upstream commit
2e00c97e2c1d2ffc9e26252ca26b237678b0b772
When we want to tear down an inode that lost the add to the cache race
in XFS we must not call into ->destroy_inode because that would delete
the inode that won the race from the inode cache radix tree.
This patch provides the __destroy_inode helper needed to fix this,
the actual fix will be in th next patch. As XFS was the only reason
destroy_inode was exported we shift the export to the new __destroy_inode.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Eric Sandeen <sandeen@sandeen.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Christoph Hellwig [Wed, 19 Aug 2009 18:42:59 +0000 (14:42 -0400)]
vfs: fix inode_init_always calling convention
backport of upstream commit
54e346215e4fe2ca8c94c54e546cc61902060510
Currently inode_init_always calls into ->destroy_inode if the additional
initialization fails. That's not only counter-intuitive because
inode_init_always did not allocate the inode structure, but in case of
XFS it's actively harmful as ->destroy_inode might delete the inode from
a radix-tree that has never been added. This in turn might end up
deleting the inode for the same inum that has been instanciated by
another process and cause lots of cause subtile problems.
Also in the case of re-initializing a reclaimable inode in XFS it would
free an inode we still want to keep alive.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Eric Sandeen <sandeen@sandeen.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Frans Pop [Wed, 26 Aug 2009 21:29:29 +0000 (14:29 -0700)]
ACPI processor: force throttling state when BIOS returns incorrect value
commit
2a908002c7b1b666616103e9df2419b38d7c6f1f upstream.
If the BIOS reports an invalid throttling state (which seems to be
fairly common after system boot), a reset is done to state T0.
Because of a check in acpi_processor_get_throttling_ptc(), the reset
never actually gets executed, which results in the error reoccurring
on every access of for example /proc/acpi/processor/CPU0/throttling.
Add a 'force' option to acpi_processor_set_throttling() to ensure
the reset really takes effect.
Addresses http://bugzilla.kernel.org/show_bug.cgi?id=13389
This patch, together with the next one, fixes a regression introduced in
2.6.30, listed on the regression list. They have been available for 2.5
months now in bugzilla, but have not been picked up, despite various
reminders and without any reason given.
Google shows that numerous people are hitting this issue. The issue is in
itself relatively minor, but the bug in the code is clear.
The patches have been in all my kernels and today testing has shown that
throttling works correctly with the patches applied when the system
overheats (http://bugzilla.kernel.org/show_bug.cgi?id=13918#c14).
Signed-off-by: Frans Pop <elendil@planet.nl>
Acked-by: Zhang Rui <rui.zhang@intel.com>
Cc: Len Brown <lenb@kernel.org>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Sunil Mushran [Thu, 6 Aug 2009 23:12:58 +0000 (16:12 -0700)]
ocfs2: Initialize the cluster we're writing to in a non-sparse extend
commit
e7432675f8ca868a4af365759a8d4c3779a3d922 upstream.
In a non-sparse extend, we correctly allocate (and zero) the clusters between
the old_i_size and pos, but we don't zero the portions of the cluster we're
writing to outside of pos<->len.
It handles clustersize > pagesize and blocksize < pagesize.
[Cleaned up by Joel Becker.]
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Jeremy Fitzhardinge [Wed, 22 Jul 2009 16:59:35 +0000 (09:59 -0700)]
x86, amd: Don't probe for extended APIC ID if APICs are disabled
commit
2cb078603abb612e3bcd428fb8122c3d39e08832 upstream.
If we've logically disabled apics, don't probe the PCI space for the
AMD extended APIC ID.
[ Impact: prevent boot crash under Xen. ]
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Reported-by: Bastian Blank <bastian@waldi.eu.org>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Cc: Andreas Herrmann <andreas.herrmann3@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Fenghua Yu [Tue, 11 Aug 2009 21:52:10 +0000 (14:52 -0700)]
Bug Fix arch/ia64/kernel/pci-dma.c: fix recursive dma_supported() call in iommu_dma_supported()
commit
51b89f7a6615eca184aa0b85db5781d931e9c8d1 upstream.
In commit
160c1d8e40866edfeae7d68816b7005d70acf391,
dma_ops->dma_supported = iommu_dma_supported;
This dma_ops->dma_supported is first called in platform_dma_init() during kernel
boot. Then dma_ops->dma_supported will be called recursively in
iommu_dma_supported.
Kernel can not boot because kernel can not get out of iommu_dma_supported until
it runs out of stack memory.
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Linus Torvalds [Sat, 1 Aug 2009 17:34:56 +0000 (10:34 -0700)]
do_sigaltstack: avoid copying 'stack_t' as a structure to user space
commit
0083fc2c50e6c5127c2802ad323adf8143ab7856 upstream.
Ulrich Drepper correctly points out that there is generally padding in
the structure on 64-bit hosts, and that copying the structure from
kernel to user space can leak information from the kernel stack in those
padding bytes.
Avoid the whole issue by just copying the three members one by one
instead, which also means that the function also can avoid the need for
a stack frame. This also happens to match how we copy the new structure
from user space, so it all even makes sense.
[ The obvious solution of adding a memset() generates horrid code, gcc
does really stupid things. ]
Reported-by: Ulrich Drepper <drepper@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Kashyap, Desai [Fri, 14 Aug 2009 09:31:35 +0000 (15:01 +0530)]
mpt2sas: fix config request and diag reset deadlock
commit
388ce4beb7135722c584b0af18f215e3ec657adf upstream.
Moving the setting and clearing of the mutex's to
_config_request. There was a mutex deadlock when diag reset is called from
inside _config_request, so diag reset was moved to outside the mutexs.
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: Eric Moore <Eric.moore@lsi.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Kashyap, Desai [Fri, 7 Aug 2009 14:08:48 +0000 (19:38 +0530)]
SCSI: mpt2sas: fix oops because drv data points to NULL on resume from hibernate
commit
fcfe6392d18283df3c561b5ef59c330d485ff8ca upstream.
Fix another ocurring when the system resumes. This oops was due to driver
setting the pci drvdata to NULL on the prior hibernation. Becuase it was
set to NULL, upon resmume we assume the pci drvdata is non-zero, and we oops.
To fix the ooops, we don't set pci drvdata to NULL at hibernation time.
Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Kashyap, Desai [Fri, 7 Aug 2009 14:07:59 +0000 (19:37 +0530)]
SCSI: mpt2sas: fix crash due to Watchdog is active while OS in standby mode
commit
e4750c989f732555fca86dd73d488c79972362db upstream.
Fix oops ocurring at hibernation time. This oops was due to the firmware fault
watchdog timer still running after we freed resources. To fix the issue we need
to terminate the watchdog timer at hibernation time.
Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Kashyap, Desai [Fri, 7 Aug 2009 14:07:14 +0000 (19:37 +0530)]
SCSI: mpt2sas: fix infinite loop inside config request
commit
6bd4e1e4d6023f4da069fd68729c502cc4e6dfd0 upstream.
This restriction is introduced just to avoid loop of
config_request. Retry must be limited so we have restricted
config request to maximum 2 times.
Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Kashyap, Desai [Fri, 7 Aug 2009 14:06:43 +0000 (19:36 +0530)]
SCSI: mpt2sas: Excessive log info causes sas iounit page time out
commit
be9e8cd75ce8d94ae4aab721fdcc337fa78a9090 upstream.
Inhibit 0x3117 loginfos - during cable pull, there are too many printks going
to the syslog, this is have impact on how fast the interrupt routine can handle
keeping up with command completions; this was the root cause to the config
pages timeouts.
Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Kashyap, Desai [Fri, 7 Aug 2009 14:05:18 +0000 (19:35 +0530)]
SCSI: mpt2sas: Raid 10 Value is showing as Raid 1E in /va/log/messages
commit
62727a7ba43c0abf2673e3877079c136a9721792 upstream.
When a volume is activated, the driver will recieve a pair of ir config change
events to remove the foreign volume, then add the native.
In the process of the removal event, the hidden raid componet is removed from
the parent.When the disks is added back, the adding of the port fails becuase
there is no instance of the device in its parent.
To fix this issue, the driver needs to call mpt2sas_transport_update_links()
prior to calling _scsih_add_device. In addition, we added sanity checks on
volume add and removal to ignore events for foreign volumes.
Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Kashyap, Desai [Fri, 7 Aug 2009 14:04:26 +0000 (19:34 +0530)]
SCSI: mpt2sas: Expander fix oops saying "Already part of another port"
commit
20f5895d55d9281830bfb7819c5c5b70b05297a6 upstream.
Kernel panic is seen because driver did not tear down the port which should
be dnoe using mpt2sas_transport_port_remove(). without this fix When expander
is added back we would oops inside sas_port_add_phy.
Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Kashyap, Desai [Fri, 7 Aug 2009 14:03:17 +0000 (19:33 +0530)]
SCSI: mpt2sas: Introduced check for enclosure_handle to avoid crash
commit
15052c9e85bf0cdadcb69eb89623bf12bad8b4f8 upstream.
Kernel panic is seen because of enclosure_handle received from FW is zero.
Check is introduced before calling mpt2sas_config_get_enclosure_pg0.
Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Tejun Heo [Thu, 6 Aug 2009 16:59:15 +0000 (01:59 +0900)]
libata: OCZ Vertex can't do HPA
commit
7831387bda72af3059be48d39846d3eb6d8ce2f6 upstream.
OCZ Vertex SSD can't do HPA and not in a usual way. It reports HPA,
allows unlocking but then fails all IOs which fall in the unlocked
area. Quirk it so that HPA unlocking is not used for the device.
Reported by Daniel Perup in bnc#522414.
https://bugzilla.novell.com/show_bug.cgi?id=522414
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Daniel Perup <probe@spray.se>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Reinette Chatre [Mon, 3 Aug 2009 19:10:16 +0000 (12:10 -0700)]
iwlagn: do not send key clear commands when rfkill enabled
commit
99f1b01562b7dcae75b043114f76163fbf84fcab upstream.
Do all key clearing except sending sommands to device when rfkill
enabled. When rfkill enabled the interface is brought down and will
be brought back up correctly after rfkill is enabled again.
Same change is not needed for iwl3945 as it ignores return code when
sending key clearing command to device.
This fixes http://bugzilla.kernel.org/show_bug.cgi?id=13742
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Frans Pop <elendil@planet.nl>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Stanislaw Gruszka [Thu, 13 Aug 2009 12:29:08 +0000 (14:29 +0200)]
iwl3945: fix rfkill switch
(Not needed upstream, due to the major rewrite in 2.6.31)
Due to rfkill and iwlwifi mishmash of SW / HW killswitch representation,
we have race conditions which make unable turn wifi radio on, after enable
and disable again killswitch. I can observe this problem on my laptop
with iwl3945 device.
In rfkill core HW switch and SW switch are separate 'states'. Device can
be only in one of 3 states: RFKILL_STATE_SOFT_BLOCKED, RFKILL_STATE_UNBLOCKED,
RFKILL_STATE_HARD_BLOCKED. Whereas in iwlwifi driver we have separate bits
STATUS_RF_KILL_HW and STATUS_RF_KILL_SW for HW and SW switches - radio can be
turned on, only if both bits are cleared.
In this particular race conditions, radio can not be turned on if in driver
STATUS_RF_KILL_SW bit is set, and rfkill core is in state
RFKILL_STATE_HARD_BLOCKED, because rfkill core is unable to call
rfkill->toggle_radio(). This situation can be entered in case:
- killswitch is turned on
- rfkill core 'see' button change first and move to RFKILL_STATE_SOFT_BLOCKED
also call ->toggle_radio() and STATE_RF_KILL_SW in driver is set
- iwl3945 get info about button from hardware to set STATUS_RF_KILL_HW bit and
force rfkill to move to RFKILL_STATE_HARD_BLOCKED
- killsiwtch is turend off
- driver clear STATUS_RF_KILL_HW
- rfkill core is unable to clear STATUS_RF_KILL_SW in driver
Additionally call to rfkill_epo() when STATUS_RF_KILL_HW in driver is set
cause move to the same situation.
In 2.6.31 this problem is fixed due to _total_ rewrite of rfkill subsystem.
This is a quite small fix for 2.6.30.x in iwlwifi driver. We are changing
internal rfkill state to always have below relations true:
STATUS_RF_KILL_HW=1 STATUS_RF_KILL_SW=1 <-> RFKILL_STATUS_SOFT_BLOCKED
STATUS_RF_KILL_HW=0 STATUS_RF_KILL_SW=1 <-> RFKILL_STATUS_SOFT_BLOCKED
STATUS_RF_KILL_HW=1 STATUS_RF_KILL_SW=0 <-> RFKILL_STATUS_HARD_BLOCKED
STATUS_RF_KILL_HW=0 STATUS_RF_KILL_SW=0 <-> RFKILL_STATUS_UNBLOCKED
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Reinette Chatre <reinette.chatre@intel.com>
Acked-by: John W. Linville <linville@tuxdriver.com>
Jan Kiszka [Thu, 2 Jul 2009 19:45:47 +0000 (21:45 +0200)]
KVM: Fix KVM_GET_MSR_INDEX_LIST
commit
e125e7b6944898831b56739a5448e705578bf7e2 upstream.
So far, KVM copied the emulated_msrs (only MSR_IA32_MISC_ENABLE) to a
wrong address in user space due to broken pointer arithmetic. This
caused subtle corruption up there (missing MSR_IA32_MISC_ENABLE had
probably no practical relevance). Moreover, the size check for the
user-provided kvm_msr_list forgot about emulated MSRs.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Michael S. Tsirkin [Tue, 1 Sep 2009 15:15:14 +0000 (12:15 -0300)]
KVM: fix ack not being delivered when msi present
(cherry picked from commit
5116d8f6b977970ebefc1932c0f313163a6ec91f)
kvm_notify_acked_irq does not check irq type, so that it sometimes
interprets msi vector as irq. As a result, ack notifiers are not
called, which typially hangs the guest. The fix is to track and
check irq type.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Marcelo Tosatti [Tue, 1 Sep 2009 15:15:13 +0000 (12:15 -0300)]
KVM: MMU: limit rmap chain length
(cherry picked from commit
53a27b39ff4d2492f84b1fdc2f0047175f0b0b93)
Otherwise the host can spend too long traversing an rmap chain, which
happens under a spinlock.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Marcelo Tosatti [Tue, 1 Sep 2009 15:15:12 +0000 (12:15 -0300)]
KVM: MMU: handle n_free_mmu_pages > n_alloc_mmu_pages in kvm_mmu_change_mmu_pages
(cherry picked from commit
025dbbf36a7680bffe54d9dcbf0a8bc01a7cbd10)
kvm_mmu_change_mmu_pages mishandles the case where n_alloc_mmu_pages is
smaller then n_free_mmu_pages, by not checking if the result of
the subtraction is negative.
Its a valid condition which can happen if a large number of pages has
been recently freed.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Marcelo Tosatti [Tue, 1 Sep 2009 15:15:11 +0000 (12:15 -0300)]
KVM: SVM: force new asid on vcpu migration
(cherry picked from commit
4b656b1202498184a0ecef86b3b89ff613b9c6ab)
If a migrated vcpu matches the asid_generation value of the target pcpu,
there will be no TLB flush via TLB_CONTROL_FLUSH_ALL_ASID.
The check for vcpu.cpu in pre_svm_run is meaningless since svm_vcpu_load
already updated it on schedule in.
Such vcpu will VMRUN with stale TLB entries.
Based on original patch from Joerg Roedel (http://patchwork.kernel.org/patch/10021/)
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Acked-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Marcelo Tosatti [Tue, 1 Sep 2009 15:15:10 +0000 (12:15 -0300)]
KVM: x86: verify MTRR/PAT validity
(cherry picked from commit
d6289b9365c3f622a8cfe62c4fb054bb70b5061a)
Do not allow invalid memory types in MTRR/PAT (generating a #GP
otherwise).
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Avi Kivity [Mon, 3 Aug 2009 17:57:57 +0000 (14:57 -0300)]
KVM: Fix cpuid feature misreporting
(cherry picked from commit
8d753f369bd28fff1706ffe9fb9fea4fd88cf85b)
MTRR, PAT, MCE, and MCA are all supported (to some extent) but not reported.
Vista requires these features, so if userspace relies on kernel cpuid
reporting, it loses support for Vista.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Amit Shah [Mon, 3 Aug 2009 17:57:56 +0000 (14:57 -0300)]
KVM: Ignore reads to K7 EVNTSEL MSRs
(cherry picked from commit
9e6996240afcbe61682eab8eeaeb65c34333164d)
In commit
7fe29e0faacb650d31b9e9f538203a157bec821d we ignored the
reads to the P6 EVNTSEL MSRs. That fixed crashes on Intel machines.
Ignore the reads to K7 EVNTSEL MSRs as well to fix this on AMD
hosts.
This fixes Kaspersky antivirus crashing Windows guests on AMD hosts.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Amit Shah [Mon, 3 Aug 2009 17:57:55 +0000 (14:57 -0300)]
KVM: x86: Ignore reads to EVNTSEL MSRs
(cherry picked from commit
7fe29e0faacb650d31b9e9f538203a157bec821d)
We ignore writes to the performance counters and performance event
selector registers already. Kaspersky antivirus reads the eventsel
MSR causing it to crash with the current behaviour.
Return 0 as data when the eventsel registers are read to stop the
crash.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Avi Kivity [Mon, 3 Aug 2009 17:57:54 +0000 (14:57 -0300)]
KVM: MMU: Use different shadows when EFER.NXE changes
(cherry picked from commit
9645bb56b31a1b70ab9e470387b5264cafc04aa9)
A pte that is shadowed when the guest EFER.NXE=1 is not valid when
EFER.NXE=0; if bit 63 is set, the pte should cause a fault, and since the
shadow EFER always has NX enabled, this won't happen.
Fix by using a different shadow page table for different EFER.NXE bits. This
allows vcpus to run correctly with different values of EFER.NXE, and for
transitions on this bit to be handled correctly without requiring a full
flush.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Glauber Costa [Mon, 3 Aug 2009 17:57:53 +0000 (14:57 -0300)]
KVM: Deal with interrupt shadow state for emulated instructions
(cherry picked from commit
310b5d306c1aee7ebe32f702c0e33e7988d50646)
We currently unblock shadow interrupt state when we skip an instruction,
but failing to do so when we actually emulate one. This blocks interrupts
in key instruction blocks, in particular sti; hlt; sequences
If the instruction emulated is an sti, we have to block shadow interrupts.
The same goes for mov ss. pop ss also needs it, but we don't currently
emulate it.
Without this patch, I cannot boot gpxe option roms at vmx machines.
This is described at https://bugzilla.redhat.com/show_bug.cgi?id=494469
Signed-off-by: Glauber Costa <glommer@redhat.com>
CC: H. Peter Anvin <hpa@zytor.com>
CC: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Glauber Costa [Mon, 3 Aug 2009 17:57:52 +0000 (14:57 -0300)]
KVM: Introduce {set/get}_interrupt_shadow()
This patch introduces set/get_interrupt_shadow(), that does exactly
what the name suggests. It also replaces open code that explicitly does
it with the now existent functions. It differs slightly from upstream,
because upstream merged it after gleb's interrupt rework, that we don't
ship.
Just for reference, upstream changelog is
(
2809f5d2c4cfad171167b131bb2a21ab65eba40f):
This patch replaces drop_interrupt_shadow with the more
general set_interrupt_shadow, that can either drop or raise
it, depending on its parameter. It also adds ->get_interrupt_shadow()
for future use.
Signed-off-by: Glauber Costa <glommer@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Gleb Natapov [Mon, 3 Aug 2009 17:57:51 +0000 (14:57 -0300)]
KVM: MMU: do not free active mmu pages in free_mmu_pages()
(cherry picked from commit
f00be0cae4e6ad0a8c7be381c6d9be3586800b3e)
free_mmu_pages() should only undo what alloc_mmu_pages() does.
Free mmu pages from the generic VM destruction function, kvm_destroy_vm().
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Marcelo Tosatti [Mon, 3 Aug 2009 17:57:50 +0000 (14:57 -0300)]
KVM: MMU: protect kvm_mmu_change_mmu_pages with mmu_lock
(cherry picked from commit
7c8a83b75a38a807d37f5a4398eca2a42c8cf513)
kvm_handle_hva, called by MMU notifiers, manipulates mmu data only with
the protection of mmu_lock.
Update kvm_mmu_change_mmu_pages callers to take mmu_lock, thus protecting
against kvm_handle_hva.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Marcelo Tosatti [Mon, 3 Aug 2009 17:57:49 +0000 (14:57 -0300)]
KVM: x86: check for cr3 validity in mmu_alloc_roots
(cherry picked from commit
8986ecc0ef58c96eec48d8502c048f3ab67fd8e2)
Verify the cr3 address stored in vcpu->arch.cr3 points to an existant
memslot. If not, inject a triple fault.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Marcelo Tosatti [Mon, 3 Aug 2009 17:57:48 +0000 (14:57 -0300)]
KVM: take mmu_lock when updating a deleted slot
(cherry picked from commit
b43b1901ad282aeb74161837fb403927102687a1)
kvm_handle_hva relies on mmu_lock protection to safely access
the memslot structures.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Takashi Iwai [Mon, 31 Aug 2009 06:15:26 +0000 (08:15 +0200)]
ALSA: hda - Fix MacBookPro 3,1/4,1 quirk with ALC889A
commit
a3f730af7e33cea10ea66f05b2565fde1f9512df upstream.
This patch fixes the wrong headphone output routing for MacBookPro 3,1/4,1
quirk with ALC889A codec, which caused the silent headphone output.
Also, this gives the individual Headphone and Speaker volume controls.
Reference: kernel bug#14078
http://bugzilla.kernel.org/show_bug.cgi?id=14078
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Trond Myklebust [Fri, 28 Aug 2009 15:12:12 +0000 (11:12 -0400)]
SUNRPC: Fix rpc_task_force_reencode
commit
2574cc9f4ffc6c681c9177111357efe5b76f0e36 upstream.
This patch fixes the bug that was reported in
http://bugzilla.kernel.org/show_bug.cgi?id=14053
If we're in the case where we need to force a reencode and then resend of
the RPC request, due to xprt_transmit failing with a networking error, then
we _must_ retransmit the entire request.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Costantino Leandro [Wed, 26 Aug 2009 21:29:28 +0000 (14:29 -0700)]
wmi: fix kernel panic when stack protection enabled.
commit
f3d83e2415445e5b157bef404d38674e9e8de169 upstream.
Summary:
Kernel panic arise when stack protection is enabled, since strncat will
add a null terminating byte '\0'; So in functions
like this one (wmi_query_block):
char wc[4]="WC";
....
strncat(method, block->object_id, 2);
...
the length of wc should be n+1 (wc[5]) or stack protection
fault will arise. This is not noticeable when stack protection is
disabled,but , isn't good either.
Config used: [CONFIG_CC_STACKPROTECTOR_ALL=y,
CONFIG_CC_STACKPROTECTOR=y]
Panic Trace
------------
.... stack-protector: kernel stack corrupted in :
fa7b182c
2.6.30-rc8-obelisco-generic
call_trace:
[<
c04a6c40>] ? panic+0x45/0xd9
[<
c012925d>] ? __stack_chk_fail+0x1c/0x40
[<
fa7b182c>] ? wmi_query_block+0x15a/0x162 [wmi]
[<
fa7b182c>] ? wmi_query_block+0x15a/0x162 [wmi]
[<
fa7e7000>] ? acer_wmi_init+0x00/0x61a [acer_wmi]
[<
fa7e7135>] ? acer_wmi_init+0x135/0x61a [acer_wmi]
[<
c0101159>] ? do_one_initcall+0x50+0x126
Addresses http://bugzilla.kernel.org/show_bug.cgi?id=13514
Signed-off-by: Costantino Leandro <lcostantino@gmail.com>
Signed-off-by: Carlos Corbacho <carlos@strangeworlds.co.uk>
Cc: Len Brown <len.brown@intel.com>
Cc: Bjorn Helgaas <bjorn.helgaas@hp.com>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Oleg Nesterov [Wed, 26 Aug 2009 21:29:24 +0000 (14:29 -0700)]
clone(): fix race between copy_process() and de_thread()
commit
4ab6c08336535f8c8e42cf45d7adeda882eff06e upstream.
Spotted by Hiroshi Shimamoto who also provided the test-case below.
copy_process() uses signal->count as a reference counter, but it is not.
This test case
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <stdio.h>
#include <errno.h>
#include <pthread.h>
void *null_thread(void *p)
{
for (;;)
sleep(1);
return NULL;
}
void *exec_thread(void *p)
{
execl("/bin/true", "/bin/true", NULL);
return null_thread(p);
}
int main(int argc, char **argv)
{
for (;;) {
pid_t pid;
int ret, status;
pid = fork();
if (pid < 0)
break;
if (!pid) {
pthread_t tid;
pthread_create(&tid, NULL, exec_thread, NULL);
for (;;)
pthread_create(&tid, NULL, null_thread, NULL);
}
do {
ret = waitpid(pid, &status, 0);
} while (ret == -1 && errno == EINTR);
}
return 0;
}
quickly creates an unkillable task.
If copy_process(CLONE_THREAD) races with de_thread()
copy_signal()->atomic(signal->count) breaks the signal->notify_count
logic, and the execing thread can hang forever in kernel space.
Change copy_process() to increment count/live only when we know for sure
we can't fail. In this case the forked thread will take care of its
reference to signal correctly.
If copy_process() fails, check CLONE_THREAD flag. If it it set - do
nothing, the counters were not changed and current belongs to the same
thread group. If it is not set, ->signal must be released in any case
(and ->count must be == 1), the forked child is the only thread in the
thread group.
We need more cleanups here, in particular signal->count should not be used
by de_thread/__exit_signal at all. This patch only fixes the bug.
Reported-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Tested-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Roland McGrath <roland@redhat.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Clemens Ladisch [Tue, 25 Aug 2009 06:15:41 +0000 (08:15 +0200)]
sound: pcm_lib: fix unsorted list constraint handling
commit
b1ddaf681e362ed453182ddee1699d7487069a16 upstream.
snd_interval_list() expected a sorted list but did not document this, so
there are drivers that give it an unsorted list. To fix this, change
the algorithm to work with any list.
This fixes the "Slave PCM not usable" error with USB devices that have
multiple alternate settings with sample rates in decreasing order, such
as the Philips Askey VC010 WebCam.
http://bugzilla.kernel.org/show_bug.cgi?id=14028
Reported-and-tested-by: Andrzej <adkadk@gmail.com>
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Ingo Molnar [Fri, 21 Aug 2009 10:53:36 +0000 (12:53 +0200)]
tracing: Fix too large stack usage in do_one_initcall()
commit
4a683bf94b8a10e2bb0da07aec3ac0a55e5de61f upstream.
One of my testboxes triggered this nasty stack overflow crash
during SCSI probing:
[ 5.874004] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[ 5.875004] device: 'sda': device_add
[ 5.878004] BUG: unable to handle kernel NULL pointer dereference at
00000a0c
[ 5.878004] IP: [<
b1008321>] print_context_stack+0x81/0x110
[ 5.878004] *pde =
00000000
[ 5.878004] Thread overran stack, or stack corrupted
[ 5.878004] Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
[ 5.878004] last sysfs file:
[ 5.878004]
[ 5.878004] Pid: 1, comm: swapper Not tainted (
2.6.31-rc6-tip-01272-g9919e28-dirty #5685)
[ 5.878004] EIP: 0060:[<
b1008321>] EFLAGS:
00010083 CPU: 0
[ 5.878004] EIP is at print_context_stack+0x81/0x110
[ 5.878004] EAX:
cf8a3000 EBX:
cf8a3fe4 ECX:
00000049 EDX:
00000000
[ 5.878004] ESI:
b1cfce84 EDI:
00000000 EBP:
cf8a3018 ESP:
cf8a2ff4
[ 5.878004] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
[ 5.878004] Process swapper (pid: 1, ti=
cf8a2000 task=
cf8a8000 task.ti=
cf8a3000)
[ 5.878004] Stack:
[ 5.878004]
b1004867 fffff000 cf8a3ffc
[ 5.878004] Call Trace:
[ 5.878004] [<
b1004867>] ? kernel_thread_helper+0x7/0x10
[ 5.878004] BUG: unable to handle kernel NULL pointer dereference at
00000a0c
[ 5.878004] IP: [<
b1008321>] print_context_stack+0x81/0x110
[ 5.878004] *pde =
00000000
[ 5.878004] Thread overran stack, or stack corrupted
[ 5.878004] Oops: 0000 [#2] PREEMPT SMP DEBUG_PAGEALLOC
The oops did not reveal any more details about the real stack
that we have and the system got into an infinite loop of
recursive pagefaults.
So i booted with CONFIG_STACK_TRACER=y and the 'stacktrace' boot
parameter. The box did not crash (timings/conditions probably
changed a tiny bit to trigger the catastrophic crash), but the
/debug/tracing/stack_trace file was rather revealing:
Depth Size Location (72 entries)
----- ---- --------
0) 3704 52 __change_page_attr+0xb8/0x290
1) 3652 24 __change_page_attr_set_clr+0x43/0x90
2) 3628 60 kernel_map_pages+0x108/0x120
3) 3568 40 prep_new_page+0x7d/0x130
4) 3528 84 get_page_from_freelist+0x106/0x420
5) 3444 116 __alloc_pages_nodemask+0xd7/0x550
6) 3328 36 allocate_slab+0xb1/0x100
7) 3292 36 new_slab+0x1c/0x160
8) 3256 36 __slab_alloc+0x133/0x2b0
9) 3220 4 kmem_cache_alloc+0x1bb/0x1d0
10) 3216 108 create_object+0x28/0x250
11) 3108 40 kmemleak_alloc+0x81/0xc0
12) 3068 24 kmem_cache_alloc+0x162/0x1d0
13) 3044 52 scsi_pool_alloc_command+0x29/0x70
14) 2992 20 scsi_host_alloc_command+0x22/0x70
15) 2972 24 __scsi_get_command+0x1b/0x90
16) 2948 28 scsi_get_command+0x35/0x90
17) 2920 24 scsi_setup_blk_pc_cmnd+0xd4/0x100
18) 2896 128 sd_prep_fn+0x332/0xa70
19) 2768 36 blk_peek_request+0xe7/0x1d0
20) 2732 56 scsi_request_fn+0x54/0x520
21) 2676 12 __generic_unplug_device+0x2b/0x40
22) 2664 24 blk_execute_rq_nowait+0x59/0x80
23) 2640 172 blk_execute_rq+0x6b/0xb0
24) 2468 32 scsi_execute+0xe0/0x140
25) 2436 64 scsi_execute_req+0x152/0x160
26) 2372 60 scsi_vpd_inquiry+0x6c/0x90
27) 2312 44 scsi_get_vpd_page+0x112/0x160
28) 2268 52 sd_revalidate_disk+0x1df/0x320
29) 2216 92 rescan_partitions+0x98/0x330
30) 2124 52 __blkdev_get+0x309/0x350
31) 2072 8 blkdev_get+0xf/0x20
32) 2064 44 register_disk+0xff/0x120
33) 2020 36 add_disk+0x6e/0xb0
34) 1984 44 sd_probe_async+0xfb/0x1d0
35) 1940 44 __async_schedule+0xf4/0x1b0
36) 1896 8 async_schedule+0x12/0x20
37) 1888 60 sd_probe+0x305/0x360
38) 1828 44 really_probe+0x63/0x170
39) 1784 36 driver_probe_device+0x5d/0x60
40) 1748 16 __device_attach+0x49/0x50
41) 1732 32 bus_for_each_drv+0x5b/0x80
42) 1700 24 device_attach+0x6b/0x70
43) 1676 16 bus_attach_device+0x47/0x60
44) 1660 76 device_add+0x33d/0x400
45) 1584 52 scsi_sysfs_add_sdev+0x6a/0x2c0
46) 1532 108 scsi_add_lun+0x44b/0x460
47) 1424 116 scsi_probe_and_add_lun+0x182/0x4e0
48) 1308 36 __scsi_add_device+0xd9/0xe0
49) 1272 44 ata_scsi_scan_host+0x10b/0x190
50) 1228 24 async_port_probe+0x96/0xd0
51) 1204 44 __async_schedule+0xf4/0x1b0
52) 1160 8 async_schedule+0x12/0x20
53) 1152 48 ata_host_register+0x171/0x1d0
54) 1104 60 ata_pci_sff_activate_host+0xf3/0x230
55) 1044 44 ata_pci_sff_init_one+0xea/0x100
56) 1000 48 amd_init_one+0xb2/0x190
57) 952 8 local_pci_probe+0x13/0x20
58) 944 32 pci_device_probe+0x68/0x90
59) 912 44 really_probe+0x63/0x170
60) 868 36 driver_probe_device+0x5d/0x60
61) 832 20 __driver_attach+0x89/0xa0
62) 812 32 bus_for_each_dev+0x5b/0x80
63) 780 12 driver_attach+0x1e/0x20
64) 768 72 bus_add_driver+0x14b/0x2d0
65) 696 36 driver_register+0x6e/0x150
66) 660 20 __pci_register_driver+0x53/0xc0
67) 640 8 amd_init+0x14/0x16
68) 632 572 do_one_initcall+0x2b/0x1d0
69) 60 12 do_basic_setup+0x56/0x6a
70) 48 20 kernel_init+0x84/0xce
71) 28 28 kernel_thread_helper+0x7/0x10
There's a lot of fat functions on that stack trace, but
the largest of all is do_one_initcall(). This is due to
the boot trace entry variables being on the stack.
Fixing this is relatively easy, initcalls are fundamentally
serialized, so we can move the local variables to file scope.
Note that this large stack footprint was present for a
couple of months already - what pushed my system over
the edge was the addition of kmemleak to the call-chain:
6) 3328 36 allocate_slab+0xb1/0x100
7) 3292 36 new_slab+0x1c/0x160
8) 3256 36 __slab_alloc+0x133/0x2b0
9) 3220 4 kmem_cache_alloc+0x1bb/0x1d0
10) 3216 108 create_object+0x28/0x250
11) 3108 40 kmemleak_alloc+0x81/0xc0
12) 3068 24 kmem_cache_alloc+0x162/0x1d0
13) 3044 52 scsi_pool_alloc_command+0x29/0x70
This pushes the total to ~3800 bytes, only a tiny bit
more was needed to corrupt the on-kernel-stack thread_info.
The fix reduces the stack footprint from 572 bytes
to 28 bytes.
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <srostedt@redhat.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Mimi Zohar [Fri, 21 Aug 2009 18:32:48 +0000 (14:32 -0400)]
kernel_read: redefine offset type
commit
6777d773a463ac045d333b989d4e44660f8d92ad upstream.
vfs_read() offset is defined as loff_t, but kernel_read()
offset is only defined as unsigned long. Redefine
kernel_read() offset as loff_t.
Signed-off-by: Mimi Zohar <zohar@us.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Mimi Zohar [Fri, 21 Aug 2009 18:32:49 +0000 (14:32 -0400)]
ima: hashing large files bug fix
commit
16bfa38b1936212428cb38fbfbbb8f6c62b8d81f upstream.
Hashing files larger than INT_MAX causes process to loop.
Dependent on redefining kernel_read() offset type to loff_t.
(http://bugzilla.kernel.org/show_bug.cgi?id=13909)
Signed-off-by: Mimi Zohar <zohar@us.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Hugh Dickins [Mon, 24 Aug 2009 15:30:28 +0000 (16:30 +0100)]
mm: fix hugetlb bug due to user_shm_unlock call
commit
353d5c30c666580347515da609dd74a2b8e9b828 upstream.
2.6.30's commit
8a0bdec194c21c8fdef840989d0d7b742bb5d4bc removed
user_shm_lock() calls in hugetlb_file_setup() but left the
user_shm_unlock call in shm_destroy().
In detail:
Assume that can_do_hugetlb_shm() returns true and hence user_shm_lock()
is not called in hugetlb_file_setup(). However, user_shm_unlock() is
called in any case in shm_destroy() and in the following
atomic_dec_and_lock(&up->__count) in free_uid() is executed and if
up->__count gets zero, also cleanup_user_struct() is scheduled.
Note that sched_destroy_user() is empty if CONFIG_USER_SCHED is not set.
However, the ref counter up->__count gets unexpectedly non-positive and
the corresponding structs are freed even though there are live
references to them, resulting in a kernel oops after a lots of
shmget(SHM_HUGETLB)/shmctl(IPC_RMID) cycles and CONFIG_USER_SCHED set.
Hugh changed Stefan's suggested patch: can_do_hugetlb_shm() at the
time of shm_destroy() may give a different answer from at the time
of hugetlb_file_setup(). And fixed newseg()'s no_id error path,
which has missed user_shm_unlock() ever since it came in 2.6.9.
Reported-by: Stefan Huber <shuber2@gmail.com>
Signed-off-by: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Tested-by: Stefan Huber <shuber2@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Linus Torvalds [Sat, 22 Aug 2009 00:40:08 +0000 (17:40 -0700)]
Re-introduce page mapping check in mark_buffer_dirty()
commit
8e9d78edea3ce5c0036f85b93091483f2f15443a upstream.
In commit
a8e7d49aa7be728c4ae241a75a2a124cdcabc0c5 ("Fix race in
create_empty_buffers() vs __set_page_dirty_buffers()"), I removed a test
for a NULL page mapping unintentionally when some of the code inside
__set_page_dirty() was moved to the callers.
That removal generally didn't matter, since a filesystem would serialize
truncation (which clears the page mapping) against writing (which marks
the buffer dirty), so locking at a higher level (either per-page or an
inode at a time) should mean that the buffer page would be stable. And
indeed, nothing bad seemed to happen.
Except it turns out that apparently reiserfs does something odd when
under load and writing out the journal, and we have a number of bugzilla
entries that look similar:
http://bugzilla.kernel.org/show_bug.cgi?id=13556
http://bugzilla.kernel.org/show_bug.cgi?id=13756
http://bugzilla.kernel.org/show_bug.cgi?id=13876
and it looks like reiserfs depended on that check (the common theme
seems to be "data=journal", and a journal writeback during a truncate).
I suspect reiserfs should have some additional locking, but in the
meantime this should get us back to the pre-2.6.29 behavior.
Pattern-pointed-out-by: Roland Kletzing <devzero@web.de>
Cc: Jeff Mahoney <jeffm@suse.com>
Cc: Nick Piggin <npiggin@suse.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Luis R. Rodriguez [Tue, 11 Aug 2009 20:10:33 +0000 (13:10 -0700)]
mac80211: fix panic when splicing unprepared TIDs
commit
416fbdff2137e8d8cc8f23f517bee3a26b11526f upstream.
We splice skbs from the pending queue for a TID
onto the local pending queue when tearing down a
block ack request. This is not necessary unless we
actually have received a request to start a block ack
request (rate control, for example). If we never received
that request we should not be splicing the tid pending
queue as it would be null, causing a panic.
Not sure yet how exactly we allowed through a call when the
tid state does not have at least HT_ADDBA_REQUESTED_MSK set,
that will require some further review as it is not quite
obvious.
For more information see the bug report:
http://bugzilla.kernel.org/show_bug.cgi?id=13922
This fixes this oops:
BUG: unable to handle kernel NULL pointer dereference at
00000030
IP: [<
f8806c70>] ieee80211_agg_splice_packets+0x40/0xc0 [mac80211]
*pdpt =
0000000002d1e001 *pde =
0000000000000000
Thread overran stack, or stack corrupted
Oops: 0000 [#1] SMP
last sysfs file: /sys/module/aes_generic/initstate
Modules linked in: <bleh>
Pid: 0, comm: swapper Not tainted (2.6.31-rc5-wl #2) Dell DV051
EIP: 0060:[<
f8806c70>] EFLAGS:
00010292 CPU: 0
EIP is at ieee80211_agg_splice_packets+0x40/0xc0 [mac80211]
EAX:
00000030 EBX:
0000004c ECX:
00000003 EDX:
00000000
ESI:
c1c98000 EDI:
f745a1c0 EBP:
c076be58 ESP:
c076be38
DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
Process swapper (pid: 0, ti=
c076a000 task=
c0709160 task.ti=
c076a000)
Stack: <bleh2>
Call Trace:
[<
f8806edb>] ? ieee80211_stop_tx_ba_cb+0xab/0x150 [mac80211]
[<
f8802f1e>] ? ieee80211_tasklet_handler+0xce/0x110 [mac80211]
[<
c04862ff>] ? net_rx_action+0xef/0x1d0
[<
c0149378>] ? tasklet_action+0x58/0xc0
[<
c014a0f2>] ? __do_softirq+0xc2/0x190
[<
c018eb48>] ? handle_IRQ_event+0x58/0x140
[<
c01205fe>] ? ack_apic_level+0x7e/0x270
[<
c014a1fd>] ? do_softirq+0x3d/0x40
[<
c014a345>] ? irq_exit+0x65/0x90
[<
c010a6af>] ? do_IRQ+0x4f/0xc0
[<
c014a35d>] ? irq_exit+0x7d/0x90
[<
c011d547>] ? smp_apic_timer_interrupt+0x57/0x90
[<
c01094a9>] ? common_interrupt+0x29/0x30
[<
c010fd9e>] ? mwait_idle+0xbe/0x100
[<
c0107e42>] ? cpu_idle+0x52/0x90
[<
c054b1a5>] ? rest_init+0x55/0x60
[<
c077492d>] ? start_kernel+0x315/0x37d
[<
c07743ce>] ? unknown_bootoption+0x0/0x1f9
[<
c0774099>] ? i386_start_kernel+0x79/0x81
Code: <bleh3>
EIP: [<
f8806c70>] ieee80211_agg_splice_packets+0x40/0xc0 [mac80211] SS:ESP 0068:
c076be38
CR2:
0000000000000030
Testedy-by: Jack Lau <jackelectronics@hotmail.com>
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Pavel Roskin [Tue, 4 Aug 2009 21:48:16 +0000 (17:48 -0400)]
rt2x00: fix memory corruption in rf cache, add a sanity check
commit
6b26dead3ce97d016b57724b01974d5ca5c84bd5 upstream.
Change rt2x00_rf_read() and rt2x00_rf_write() to subtract 1 from the rf
register number. This is needed because the rf registers are enumerated
starting with one. The size of the rf register cache is just enough to
hold all registers, so writing to the highest register was corrupting
memory. Add a check to make sure that the rf register number is valid.
Signed-off-by: Pavel Roskin <proski@gnu.org>
Acked-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Bo Liu [Tue, 18 Aug 2009 21:11:19 +0000 (14:11 -0700)]
mm: build_zonelists(): move clear node_load[] to __build_all_zonelists()
commit
7f9cfb31030737a7fc9a1cbca3fd01bec184c849 upstream.
If node_load[] is cleared everytime build_zonelists() is
called,node_load[] will have no help to find the next node that should
appear in the given node's fallback list.
Because of the bug, zonelist's node_order is not calculated as expected.
This bug affects on big machine, which has asynmetric node distance.
[synmetric NUMA's node distance]
0 1 2
0 10 12 12
1 12 10 12
2 12 12 10
[asynmetric NUMA's node distance]
0 1 2
0 10 12 20
1 12 10 14
2 20 14 10
This (my bug) is very old but no one has reported this for a long time.
Maybe because the number of asynmetric NUMA is very small and they use
cpuset for customizing node memory allocation fallback.
[akpm@linux-foundation.org: fix CONFIG_NUMA=n build]
Signed-off-by: Bo Liu <bo-liu@hotmail.com>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Christoph Lameter <cl@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Linus Torvalds [Fri, 21 Aug 2009 16:48:10 +0000 (09:48 -0700)]
x86: don't call '->send_IPI_mask()' with an empty mask
commit
b04e6373d694e977c95ae0ae000e2c1e2cf92d73 upstream.
As noted in
83d349f35e1ae72268c5104dbf9ab2ae635425d4 ("x86: don't send
an IPI to the empty set of CPU's"), some APIC's will be very unhappy
with an empty destination mask. That commit added a WARN_ON() for that
case, and avoided the resulting problem, but didn't fix the underlying
reason for why those empty mask cases happened.
This fixes that, by checking the result of 'cpumask_andnot()' of the
current CPU actually has any other CPU's left in the set of CPU's to be
sent a TLB flush, and not calling down to the IPI code if the mask is
empty.
The reason this started happening at all is that we started passing just
the CPU mask pointers around in commit
4595f9620 ("x86: change
flush_tlb_others to take a const struct cpumask"), and when we did that,
the cpumask was no longer thread-local.
Before that commit, flush_tlb_mm() used to create it's own copy of
'mm->cpu_vm_mask' and pass that copy down to the low-level flush
routines after having tested that it was not empty. But after changing
it to just pass down the CPU mask pointer, the lower level TLB flush
routines would now get a pointer to that 'mm->cpu_vm_mask', and that
could still change - and become empty - after the test due to other
CPU's having flushed their own TLB's.
See
http://bugzilla.kernel.org/show_bug.cgi?id=13933
for details.
Tested-by: Thomas Björnell <thomas.bjornell@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Linus Torvalds [Fri, 21 Aug 2009 16:23:57 +0000 (09:23 -0700)]
x86: don't send an IPI to the empty set of CPU's
commit
83d349f35e1ae72268c5104dbf9ab2ae635425d4 upstream.
The default_send_IPI_mask_logical() function uses the "flat" APIC mode
to send an IPI to a set of CPU's at once, but if that set happens to be
empty, some older local APIC's will apparently be rather unhappy. So
just warn if a caller gives us an empty mask, and ignore it.
This fixes a regression in 2.6.30.x, due to commit
4595f9620 ("x86:
change flush_tlb_others to take a const struct cpumask"), documented
here:
http://bugzilla.kernel.org/show_bug.cgi?id=13933
which causes a silent lock-up. It only seems to happen on PPro, P2, P3
and Athlon XP cores. Most developers sadly (or not so sadly, if you're
a developer..) have more modern CPU's. Also, on x86-64 we don't use the
flat APIC mode, so it would never trigger there even if the APIC didn't
like sending an empty IPI mask.
Reported-by: Pavel Vilim <wylda@volny.cz>
Reported-and-tested-by: Thomas Björnell <thomas.bjornell@gmail.com>
Reported-and-tested-by: Martin Rogge <marogge@onlinehome.de>
Cc: Mike Travis <travis@sgi.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Linus Torvalds [Fri, 21 Aug 2009 16:26:15 +0000 (09:26 -0700)]
Make bitmask 'and' operators return a result code
commit
f4b0373b26567cafd421d91101852ed7a34e9e94 upstream.
When 'and'ing two bitmasks (where 'andnot' is a variation on it), some
cases want to know whether the result is the empty set or not. In
particular, the TLB IPI sending code wants to do cpumask operations and
determine if there are any CPU's left in the final set.
So this just makes the bitmask (and cpumask) functions return a boolean
for whether the result has any bits set.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Guillaume Knispel [Sat, 15 Aug 2009 17:30:24 +0000 (19:30 +0200)]
poll/select: initialize triggered field of struct poll_wqueues
commit
b2add73dbf93fd50f00564d7abc3e2b9aa9dd20c upstream.
The triggered field of struct poll_wqueues introduced in commit
5f820f648c92a5ecc771a96b3c29aa6e90013bba ("poll: allow f_op->poll to
sleep").
It was first set to 1 in pollwake() (now __pollwake() ), tested and
later set to 0 in poll_schedule_timeout(), but not initialized before.
As a result when the process needs to sleep, triggered was likely to be
non-zero even if pollwake() is not called before the first
poll_schedule_timeout(), meaning schedule_hrtimeout_range() would not be
called and an extra loop calling all ->poll() would be done.
This patch initialize triggered to 0 in poll_initwait() so the ->poll()
are not called twice before the process goes to sleep when it needs to.
Signed-off-by: Guillaume Knispel <gknispel@proformatique.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Hannes Hering [Tue, 4 Aug 2009 18:48:39 +0000 (11:48 -0700)]
ehea: Fix napi list corruption on ifconfig down
commit
357eb46d8f275b4e8484541234ea3ba06065e258 upstream.
This patch fixes the napi list handling when an ehea interface is shut
down to avoid corruption of the napi list.
Signed-off-by: Hannes Hering <hering2@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Greg Kroah-Hartman [Sun, 16 Aug 2009 21:19:38 +0000 (14:19 -0700)]
Linux 2.6.30.5
Maxime Bizon [Thu, 16 Jul 2009 06:32:52 +0000 (06:32 +0000)]
ide: fix memory leak when flush command is issued
commit
bc146d23d1358af43f03793c3ad8c9f16bbcffcb upstream.
I'm using ide on 2.6.30.1 with xfs filesystem. I noticed a kernel memory
leak after writing lots of data, the kmalloc-96 slab cache keeps
growing. It seems the struct ide_cmd kmalloced by idedisk_prepare_flush
is never kfreed.
Commit
a09485df9cda49fbde2766c86eb18a9cae585162 ("ide: move request
type specific code from ide_end_drive_cmd() to callers (v3)") and
f505d49ffd25ed062e76ffd17568d3937fcd338c ("ide: fix barriers support")
cause this regression, cmd->rq must now be set for ide_complete_cmd to
honor the IDE_TFLAG_DYN flag.
Signed-off-by: Maxime Bizon <mbizon@freebox.fr>
Acked-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Cc: Simon Kirby <sim@netnation.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Takashi Iwai [Mon, 10 Aug 2009 09:55:51 +0000 (11:55 +0200)]
ALSA: hda - Add missing vmaster initialization for ALC269
commit
100d5eb36ba20dc0b99a17ea2b9800c567bfc3d1 upstream.
Without the initialization of vmaster NID, the dB information got
confused for ALC269 codec.
Reference: Novell bnc#527361
https://bugzilla.novell.com/show_bug.cgi?id=527361
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Trond Myklebust [Wed, 12 Aug 2009 13:12:30 +0000 (09:12 -0400)]
NFS: Fix an O_DIRECT Oops...
commit
1ae88b2e446261c038f2c0c3150ffae142b227a2 upstream.
We can't call nfs_readdata_release()/nfs_writedata_release() without
first initialising and referencing args.context. Doing so inside
nfs_direct_read_schedule_segment()/nfs_direct_write_schedule_segment()
causes an Oops.
We should rather be calling nfs_readdata_free()/nfs_writedata_free() in
those cases.
Looking at the O_DIRECT code, the "struct nfs_direct_req" is already
referencing the nfs_open_context for us. Since the readdata and writedata
structures carry a reference to that, we can simplify things by getting rid
of the extra nfs_open_context references, so that we can replace all
instances of nfs_readdata_release()/nfs_writedata_release().
Reported-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Tested-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>