Wei Yongjun [Thu, 16 May 2013 22:25:34 +0000 (22:25 +0000)]
gianfar: add missing iounmap() on error in gianfar_ptp_probe()
[ Upstream commit
e5f5e380e0f3bb11f04ca5bc66a551e58e0ad26e ]
Add the missing iounmap() before return from gianfar_ptp_probe()
in the error handling case.
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Eric Dumazet [Mon, 13 May 2013 02:24:11 +0000 (02:24 +0000)]
net/802/mrp: fix lockdep splat
[ Upstream commit
faff57a92ba1d7247c5e86ecea2886d2c9d54507 ]
commit
fb745e9a037895 ("net/802/mrp: fix possible race condition when
calling mrp_pdu_queue()") introduced a lockdep splat.
[ 19.735147] =================================
[ 19.735235] [ INFO: inconsistent lock state ]
[ 19.735324] 3.9.2-build-0063 #4 Not tainted
[ 19.735412] ---------------------------------
[ 19.735500] inconsistent {IN-SOFTIRQ-W} -> {SOFTIRQ-ON-W} usage.
[ 19.735592] rmmod/1840 [HC0[0]:SC0[0]:HE1:SE1] takes:
[ 19.735682] (&(&app->lock)->rlock#2){+.?...}, at: [<
f862bb5b>]
mrp_uninit_applicant+0x69/0xba [mrp]
app->lock is normally taken under softirq context, so disable BH to
avoid the splat.
Reported-by: Denys Fedoryshchenko <denys@visp.net.lb>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: David Ward <david.ward@ll.mit.edu>
Cc: Cong Wang <amwang@redhat.com>
Tested-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Eric Dumazet [Mon, 13 May 2013 21:25:52 +0000 (21:25 +0000)]
tcp: fix tcp_md5_hash_skb_data()
[ Upstream commit
54d27fcb338bd9c42d1dfc5a39e18f6f9d373c2e ]
TCP md5 communications fail [1] for some devices, because sg/crypto code
assume page offsets are below PAGE_SIZE.
This was discovered using mlx4 driver [2], but I suspect loopback
might trigger the same bug now we use order-3 pages in tcp_sendmsg()
[1] Failure is giving following messages.
huh, entered softirq 3 NET_RX
ffffffff806ad230 preempt_count
00000100,
exited with
00000101?
[2] mlx4 driver uses order-2 pages to allocate RX frags
Reported-by: Matt Schnall <mischnal@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Bernhard Beck <bbeck@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Frank Li [Tue, 7 May 2013 14:08:44 +0000 (14:08 +0000)]
net: fec: fix kernel oops when plug/unplug cable many times
[ Upstream commits
54309fa60b5f57b90c1842176f6045e665d21142 and
3169134478a9638baf0dbb4fdca5a0718cbe8e27 ]
reproduce steps
1. flood ping from other machine
ping -f -s 41000 IP
2. run below script
while [ 1 ]; do ethtool -s eth0 autoneg off;
sleep 3;ethtool -s eth0 autoneg on; sleep 4; done;
You can see oops in one hour.
The reason is fec_restart clear BD but NAPI may use it.
The solution is disable NAPI and stop xmit when reset BD.
disable NAPI may sleep, so fec_restart can't be call in
atomic context.
Signed-off-by: Frank Li <Frank.Li@freescale.com>
Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
Tested-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Paul Gortmaker [Wed, 19 Jun 2013 15:15:26 +0000 (11:15 -0400)]
x86: Fix section mismatch on load_ucode_ap
commit
949785996ec2250fa958fc3a924e5186e9a8fa2c upstream.
We are in the process of removing all the __cpuinit annotations.
While working on making that change, an existing problem was
made evident:
WARNING: arch/x86/kernel/built-in.o(.text+0x198f2): Section mismatch
in reference from the function cpu_init() to the function
.init.text:load_ucode_ap() The function cpu_init() references
the function __init load_ucode_ap(). This is often because cpu_init
lacks a __init annotation or the annotation of load_ucode_ap is wrong.
This now appears because in my working tree, cpu_init() is no longer
tagged as __cpuinit, and so the audit picks up the mismatch. The 2nd
hypothesis from the audit is the correct one, as there was an incorrect
__init tag on the prototype in the header (but __cpuinit was used on
the function itself.)
The audit is telling us that the prototype's __init annotation took
effect and the function did land in the .init.text section. Checking
with objdump on a mainline tree that still has __cpuinit shows that
the __cpuinit on the function takes precedence over the __init on the
prototype, but that won't be true once we make __cpuinit a no-op.
Even though we are removing __cpuinit, we temporarily align both
the function and the prototype on __cpuinit so that the changeset
can be applied to stable trees if desired.
[ hpa: build fix only, no object code change ]
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Link: http://lkml.kernel.org/r/1371654926-11729-1-git-send-email-paul.gortmaker@windriver.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Randy Dunlap [Tue, 18 Jun 2013 19:33:40 +0000 (12:33 -0700)]
x86: fix build error and kconfig for ia32_emulation and binfmt
commit
d1603990ea626668c78527376d9ec084d634202d upstream.
Fix kconfig warning and build errors on x86_64 by selecting BINFMT_ELF
when COMPAT_BINFMT_ELF is being selected.
warning: (IA32_EMULATION) selects COMPAT_BINFMT_ELF which has unmet direct dependencies (COMPAT && BINFMT_ELF)
fs/built-in.o: In function `elf_core_dump':
compat_binfmt_elf.c:(.text+0x3e093): undefined reference to `elf_core_extra_phdrs'
compat_binfmt_elf.c:(.text+0x3ebcd): undefined reference to `elf_core_extra_data_size'
compat_binfmt_elf.c:(.text+0x3eddd): undefined reference to `elf_core_write_extra_phdrs'
compat_binfmt_elf.c:(.text+0x3f004): undefined reference to `elf_core_write_extra_data'
[ hpa: This was sent to me for -next but it is a low risk build fix ]
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Link: http://lkml.kernel.org/r/51C0B614.5000708@infradead.org
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Yinghai Lu [Thu, 13 Jun 2013 20:17:01 +0000 (13:17 -0700)]
x86, mtrr: Fix original mtrr range get for mtrr_cleanup
commit
d8d386c10630d8f7837700f4c466443d49e12cc0 upstream.
Joshua reported: Commit
cd7b304dfaf1 (x86, range: fix missing merge
during add range) broke mtrr cleanup on his setup in 3.9.5.
corresponding commit in upstream is
fbe06b7bae7c.
*BAD*gran_size: 64K chunk_size: 16M num_reg: 6 lose cover RAM: -0G
https://bugzilla.kernel.org/show_bug.cgi?id=59491
So it rejects new var mtrr layout.
It turns out we have some problem with initial mtrr range retrieval.
The current sequence is:
x86_get_mtrr_mem_range
==> bunchs of add_range_with_merge
==> bunchs of subract_range
==> clean_sort_range
add_range_with_merge for [0,1M)
sort_range()
add_range_with_merge could have blank slots, so we can not just
sort only, that will have final result have extra blank slot in head.
So move that calling add_range_with_merge for [0,1M), with that we
could avoid extra clean_sort_range calling.
Reported-by: Joshua Covington <joshuacov@googlemail.com>
Tested-by: Joshua Covington <joshuacov@googlemail.com>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/1371154622-8929-2-git-send-email-yinghai@kernel.org
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Yinghai Lu [Thu, 13 Jun 2013 20:17:02 +0000 (13:17 -0700)]
range: Do not add new blank slot with add_range_with_merge
commit
0541881502a1276149889fe468662ff6a8fc8f6d upstream.
Joshua reported: Commit
cd7b304dfaf1 (x86, range: fix missing merge
during add range) broke mtrr cleanup on his setup in 3.9.5.
corresponding commit in upstream is
fbe06b7bae7c.
The reason is add_range_with_merge could generate blank spot.
We could avoid that by searching new expanded start/end, that
new range should include all connected ranges in range array.
At last add the new expanded start/end to the range array.
Also move up left array so do not add new blank slot in the
range array.
-v2: move left array to avoid enhance add_range()
-v3: include fix from Joshua about memmove declaring when
DYN_DEBUG is used.
Reported-by: Joshua Covington <joshuacov@googlemail.com>
Tested-by: Joshua Covington <joshuacov@googlemail.com>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/1371154622-8929-3-git-send-email-yinghai@kernel.org
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jerome Glisse [Wed, 19 Jun 2013 14:02:28 +0000 (10:02 -0400)]
drm/radeon: update lockup tracking when scheduling in empty ring
commit
8444d5c69549aa0f0b574cc608742d4669e1cc01 upstream.
There might be issue with lockup detection when scheduling on an
empty ring that have been sitting idle for a while. Thus update
the lockup tracking data when scheduling new work in an empty ring.
Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Tested-by: Andy Lutomirski <luto@amacapital.net>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jerome Glisse [Thu, 6 Jun 2013 16:41:17 +0000 (12:41 -0400)]
drm/radeon: do not try to uselessly update virtual memory pagetable
commit
3813f5ca9ab7a00e80a17aab34f155453c66c78a upstream.
If a buffer is never bound to a virtual memory pagetable than don't try
to unbind it. Only drawback is that we don't update the pagetable when
unbinding the ib pool buffer which is fine because it only happens at
suspend or module unload/shutdown.
Fixes spurious messages about buffers without VM mappings. E.g.:
radeon 0000:01:00.0: bo
ffff88020afac400 don't has a mapping in vm
ffff88021ca2b900
Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Laurent Pinchart [Wed, 19 Jun 2013 01:14:20 +0000 (03:14 +0200)]
drm/prime: Honor requested file flags when exporting a buffer
commit
ebc0bad4a05ad63979e8bc115cea3b8abdf814c7 upstream.
The DRM PRIME API passes file flags to the driver for the exported
buffer. Honor them instead of hardcoding 0600.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Rafael J. Wysocki [Tue, 18 Jun 2013 22:44:45 +0000 (00:44 +0200)]
ACPI / PM: Fix error code path for power resources initialization
commit
6ee22e9d59151550a55d370b14109bdae8b58bda upstream.
Commit
781d737 (ACPI: Drop power resources driver) introduced a
bug in the power resources initialization error code path causing
a NULL pointer to be referenced in acpi_release_power_resource()
if there's an error triggering a jump to the 'err' label in
acpi_add_power_resource(). This happens because the list_node
field of struct acpi_power_resource has not been initialized yet
at this point and doing a list_del() on it is a bad idea.
To prevent this problem from occuring, initialize the list_node
field of struct acpi_power_resource upfront.
Reported-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Tested-by: Lan Tianyu <tianyu.lan@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Rafael J. Wysocki [Sat, 15 Jun 2013 22:38:30 +0000 (00:38 +0200)]
ACPI / dock: Take ACPI scan lock in write_undock()
commit
8112006f41fd76ddf4988f8ddd904563db85613c upstream.
Since commit
3757b94 (ACPI / hotplug: Fix concurrency issues and
memory leaks) acpi_bus_scan() and acpi_bus_trim() must always be
called under acpi_scan_lock, but currently the following scenario
violating that requirement is possible:
write_undock()
handle_eject_request()
hotplug_dock_devices()
dock_remove_acpi_device()
acpi_bus_trim()
Fix that by making write_undock() acquire acpi_scan_lock before
calling handle_eject_request() as appropriate (begin_undock() is
under the lock too in analogy with acpi_dock_deferred_cb()).
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Toshi Kani <toshi.kani@hp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Mika Westerberg [Mon, 20 May 2013 15:41:45 +0000 (15:41 +0000)]
ACPI / resources: call acpi_get_override_irq() only for legacy IRQ resources
commit
204ebc0aa30a7115f300cac39fbb7eeb66524881 upstream.
acpi_get_override_irq() was added because there was a problem with
buggy BIOSes passing wrong IRQ() resource for the RTC IRQ. The
commit that added the workaround was
61fd47e0c8476 (ACPI: fix two
IRQ8 issues in IOAPIC mode).
With ACPI 5 enumerated devices there are typically one or more
extended IRQ resources per device (and these IRQs can be shared).
However, the acpi_get_override_irq() workaround forces all IRQs in
range 0 - 15 (the legacy ISA IRQs) to be edge triggered, active high
as can be seen from the dmesg below:
ACPI: IRQ 6 override to edge, high
ACPI: IRQ 7 override to edge, high
ACPI: IRQ 7 override to edge, high
ACPI: IRQ 13 override to edge, high
Also /proc/interrupts for the I2C controllers (INT33C2 and INT33C3) shows
the same thing:
7: 4 0 0 0 IO-APIC-edge INT33C2:00, INT33C3:00
The _CSR method for INT33C2 (and INT33C3) device returns following
resource:
Interrupt (ResourceConsumer, Level, ActiveLow, Shared,,, )
{
0x00000007,
}
which states that this is supposed to be level triggered, active low,
shared IRQ instead.
Fix this by making sure that acpi_get_override_irq() gets only called
when we are dealing with legacy IRQ() or IRQNoFlags() descriptors.
While we are there, correct pr_warning() to print the right triggering
value.
This change turns out to be necessary to make DMA work correctly on
systems based on the Intel Lynxpoint PCH (Platform Controller Hub).
[rjw: Changelog]
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Zhanghaoyu (A) [Fri, 14 Jun 2013 07:36:13 +0000 (07:36 +0000)]
KVM: x86: remove vcpu's CPL check in host-invoked XCR set
commit
764bcbc5a6d7a2f3e75c9f0e4caa984e2926e346 upstream.
__kvm_set_xcr function does the CPL check when set xcr. __kvm_set_xcr is
called in two flows, one is invoked by guest, call stack shown as below,
handle_xsetbv(or xsetbv_interception)
kvm_set_xcr
__kvm_set_xcr
the other one is invoked by host, for example during system reset:
kvm_arch_vcpu_ioctl
kvm_vcpu_ioctl_x86_set_xcrs
__kvm_set_xcr
The former does need the CPL check, but the latter does not.
Signed-off-by: Zhang Haoyu <haoyu.zhang@huawei.com>
[Tweaks to commit message. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Igor Mammedov [Mon, 10 Jun 2013 16:31:11 +0000 (18:31 +0200)]
x86: kvmclock: zero initialize pvclock shared memory area
commit
07868fc6aaf57847b0f3a3d53086b7556eb83f4a upstream.
kernel might hung in pvclock_clocksource_read() due to
uninitialized memory might contain odd version value in
following cycle:
do {
version = __pvclock_read_cycles(src, &ret, &flags);
} while ((src->version & 1) || version != src->version);
if secondary kvmclock is accessed before it's registered with kvm.
Clear garbage in pvclock shared memory area right after it's
allocated to avoid this issue.
Ref: https://bugzilla.kernel.org/show_bug.cgi?id=59521
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
[See BZ for analysis. We may want a different fix for 3.11, but
this is the safest for now - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ben Hutchings [Sun, 16 Jun 2013 20:27:12 +0000 (21:27 +0100)]
x86/efi: Fix dummy variable buffer allocation
commit
b8cb62f82103083a6e8fa5470bfe634a2c06514d upstream.
1. Check for allocation failure
2. Clear the buffer contents, as they may actually be written to flash
3. Don't leak the buffer
Compile-tested only.
[ Tested successfully on my buggy ASUS machine - Matt ]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Christian Lamparter [Fri, 22 Feb 2013 00:30:44 +0000 (01:30 +0100)]
carl9170: fix frame drop and WARN due to minstrel_ht change
commit
5f34608fa2acbfef5a06d0072a978c9943c28a2d upstream.
With "mac80211/minstrel_ht: add support for using CCK rates"
minstrel_ht selects legacy CCK rates as viable rates for
outgoing frames which might be sent as part of an A-MPDU
[IEEE80211_TX_CTL_AMPDU is set].
This behavior triggered the following WARN_ON in the driver:
> WARNING: at carl9170/tx.c:995 carl9170_op_tx+0x1dd/0x6fd
The driver assumed that the rate control algorithm made a
mistake and dropped the frame.
This patch removes the noisy warning altogether and allows
said A-MPDU frames with CCK sample and/or fallback rates to
be transmitted seamlessly.
Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Cc: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Thomas Bogendoerfer [Fri, 14 Jun 2013 07:05:41 +0000 (09:05 +0200)]
parisc: provide pci_mmap_page_range() for parisc
commit
2cc7138f4347df939ce03f313e3d87794bab36f8 upstream.
pci_mmap_page_range() is needed for X11-server support on C8000 with ATI
FireGL card.
Signed-off-by Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Thomas Bogendoerfer [Sun, 9 Jun 2013 21:00:21 +0000 (23:00 +0200)]
parisc: fix serial ports on C8000 workstation
commit
9a66d1869d90f13fbaf83dcce5b1aeec86fbc699 upstream.
The C8000 workstation (64 bit kernel only) has a somewhat different
serial port configuration than other models.
Thomas Bogendoerfer sent a patch to fix this in September 2010, which
was now minimally modified by me.
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Helge Deller [Wed, 5 Jun 2013 20:50:01 +0000 (20:50 +0000)]
parisc: fix kernel BUG at arch/parisc/include/asm/mmzone.h:50 (part 2)
commit
91ea8207168793b365322be3c90a4ee9e8b03ed4 upstream.
Make sure that we really return -1 (instead of 0x00ff) as node id for
page frame numbers which are not physically available.
This finally fixes the kernel panic when running
cat /proc/kpageflags /proc/kpagecount.
Theoretically this patch now limits the number of physical memory ranges
to 127 instead of 254, but currently we have MAX_PHYSMEM_RANGES
hardcoded to 8 which is sufficient for all existing parisc machines.
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Helge Deller [Thu, 30 May 2013 21:06:39 +0000 (21:06 +0000)]
parisc: parport0: fix this legacy no-device port driver!
commit
4edb38695d9a3cd62739f8595e21f36f0aabf4c2 upstream.
Fix the above kernel error from parport_announce_port() on 32bit GSC
machines (e.g. B160L). The parport driver requires now a pointer to the
device struct.
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Chen Gang [Thu, 30 May 2013 01:18:43 +0000 (01:18 +0000)]
parisc: kernel: using strlcpy() instead of strcpy()
commit
ea99b1adf22abd62bdcf14b1c9a0a4d3664eefd8 upstream.
'boot_args' is an input args, and 'boot_command_line' has a fix length.
So use strlcpy() instead of strcpy() to avoid memory overflow.
Signed-off-by: Chen Gang <gang.chen@asianux.com>
Acked-by: Kyle McMartin <kyle@mcmartin.ca>
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Paul Bolle [Wed, 29 May 2013 09:56:58 +0000 (09:56 +0000)]
parisc: rename "CONFIG_PA7100" to "CONFIG_PA7000"
commit
766039022a480ede847659daaa78772bdcc598ae upstream.
There's a Makefile line setting cflags for CONFIG_PA7100. But that
Kconfig macro doesn't exist. There is a Kconfig symbol PA7000, which
covers both PA7000 and PA7100 processors. So let's use the corresponding
Kconfig macro.
Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Helge Deller [Tue, 28 May 2013 20:35:54 +0000 (20:35 +0000)]
parisc: fix kernel BUG at arch/parisc/include/asm/mmzone.h:50
commit
ae249b5fa27f9fba25aa59664d4338efc2dd2394 upstream.
With CONFIG_DISCONTIGMEM=y and multiple physical memory areas,
cat /proc/kpageflags triggers this kernel bug:
kernel BUG at arch/parisc/include/asm/mmzone.h:50!
CPU: 2 PID: 7848 Comm: cat Tainted: G D W 3.10.0-rc3-64bit #44
IAOQ[0]: kpageflags_read0x128/0x238
IAOQ[1]: kpageflags_read0x12c/0x238
RP(r2): proc_reg_read0xbc/0x130
Backtrace:
[<
00000000402ca2d4>] proc_reg_read0xbc/0x130
[<
0000000040235bcc>] vfs_read0xc4/0x1d0
[<
0000000040235f0c>] SyS_read0x94/0xf0
[<
0000000040105fc0>] syscall_exit0x0/0x14
kpageflags_read() walks through the whole memory, even if some memory
areas are physically not available. So, we should better not BUG on an
unavailable pfn in pfn_to_nid() but just return the expected value -1 or
0.
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Chen Gang [Mon, 27 May 2013 04:57:09 +0000 (04:57 +0000)]
parisc: memory overflow, 'name' length is too short for using
commit
3f108de96ba449a8df3d7e3c053bf890fee2cb95 upstream.
'path.bc[i]' can be asigned by PCI_SLOT() which can '> 10', so sizeof(6
* "%u:" + "%u" + '\0') may be 21.
Since 'name' length is 20, it may be memory overflow.
And 'path.bc[i]' is 'unsigned char' for printing, we can be sure the
max length of 'name' must be less than 28.
So simplify thinking, we can use 28 instead of 20 directly, and do not
think of whether 'patchc.bc[i]' can '> 100'.
Signed-off-by: Chen Gang <gang.chen@asianux.com>
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Helge Deller [Fri, 24 May 2013 21:27:35 +0000 (21:27 +0000)]
parisc: fix irq stack on UP and SMP
commit
d96b51ec14650b490ab98e738bcc02309396e5bc upstream.
The logic to detect if the irq stack was already in use with
raw_spin_trylock() is wrong, because it will generate a "trylock failure
on UP" error message with CONFIG_SMP=n and CONFIG_DEBUG_SPINLOCK=y.
arch_spin_trylock() can't be used either since in the CONFIG_SMP=n case
no atomic protection is given and we are reentrant here. A mutex didn't
worked either and brings more overhead by turning off interrupts.
So, let's use the fastest path for parisc which is the ldcw instruction.
Counting how often the irq stack was used is pretty useless, so just
drop this piece of code.
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
John David Anglin [Mon, 20 May 2013 16:42:53 +0000 (16:42 +0000)]
parisc: make interrupt and interruption stack allocation reentrant
commit
b63a2bbc0b9b106a93e11952ab057e2408f2eb02 upstream.
The get_stack_use_cr30 and get_stack_use_r30 macros allocate a stack
frame for external interrupts and interruptions requiring a stack frame.
They are currently not reentrant in that they save register context
before the stack is set or adjusted.
I have observed a number of system crashes where there was clear
evidence of stack corruption during interrupt processing, and as a
result register corruption. Some interruptions can still occur during
interruption processing, however external interrupts are disabled and
data TLB misses don't occur for absolute accesses. So, it's not entirely
clear what triggers this issue. Also, if an interruption occurs when
Q=0, it is generally not possible to recover as the shadowed registers
are not copied.
The attached patch reworks the get_stack_use_cr30 and get_stack_use_r30
macros to allocate stack before doing register saves. The new code is a
couple of instructions shorter than the old implementation. Thus, it's
an improvement even if it doesn't fully resolve the stack corruption
issue. Based on limited testing, it improves SMP system stability.
Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Helge Deller [Sat, 18 May 2013 19:35:44 +0000 (19:35 +0000)]
parisc: show number of FPE and unaligned access handler calls in /proc/interrupts
commit
d0c3be806a3fe7f4abdb0f7e7287addb55e73f35 upstream.
Show number of floating point assistant and unaligned access fixup
handler in /proc/interrupts file.
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Helge Deller [Thu, 16 May 2013 20:42:39 +0000 (20:42 +0000)]
parisc: add rp5470 entry to machine database
commit
949451b9b19da5e998778eb78929aafc73b5c227 upstream.
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Helge Deller [Fri, 10 May 2013 21:24:01 +0000 (21:24 +0000)]
parisc: implement irq stacks - part 2 (v2)
commit
416821d3d68164909b2cbcf398e4ba0797f5f8a2 upstream.
This patch fixes few build issues which were introduced with the last
irq stack patch, e.g. the combination of stack overflow check and irq
stack.
Furthermore we now do proper locking and change the irq bh handler
to use the irq stack as well.
In /proc/interrupts one now can monitor how huge the irq stack has grown
and how often it was preferred over the kernel stack.
IRQ stacks are now enabled by default just to make sure that we not
overflow the kernel stack by accident.
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Zhao Hongjiang [Tue, 7 May 2013 23:18:12 +0000 (16:18 -0700)]
parisc: remove the second argument of kmap_atomic()
commit
1ab4ce762370b82870834899e49c08129d7ae271 upstream.
kmap_atomic() requires only one argument now.
Signed-off-by: Zhao Hongjiang <zhaohongjiang@huawei.com>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: Helge Deller <deller@gmx.de>
Cc: Rolf Eike Beer <eike-kernel@sf-tec.de>
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@linuxfoundation.org>
Helge Deller [Tue, 7 May 2013 21:42:47 +0000 (21:42 +0000)]
parisc: tlb flush counting fix for SMP and UP
commit
0fc537d1d655cdae69b489dbba46ad617cfc1373 upstream.
Fix up build error on UP and show correctly number of function call
(ipi) irqs.
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Helge Deller [Mon, 6 May 2013 19:20:26 +0000 (19:20 +0000)]
parisc: more irq statistics in /proc/interrupts
commit
cd85d5514d5c4d7e78abac923fc032457d0c5091 upstream.
Add framework and initial values for more fine grained statistics in
/proc/interrupts.
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Helge Deller [Tue, 7 May 2013 20:25:42 +0000 (20:25 +0000)]
parisc: implement irq stacks
commit
200c880420a2c02a0899120ce52d801fad705b90 upstream.
Default kernel stack size on parisc is 16k. During tests we found that the
kernel stack can easily grow beyond 13k, which leaves 3k left for irq
processing.
This patch adds the possibility to activate an additional stack of 16k per CPU
which is being used during irq processing. This implementation does not yet
uses this irq stack for the irq bh handler.
The assembler code for call_on_stack was heavily cleaned up by John
David Anglin.
Signed-off-by: Helge Deller <deller@gmx.de>
CC: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Helge Deller [Tue, 7 May 2013 19:28:52 +0000 (19:28 +0000)]
parisc: add kernel stack overflow check
commit
9372450cc22d185f708e5cc3557cf991be4b7dc5 upstream.
Add the CONFIG_DEBUG_STACKOVERFLOW config option to enable checks to
detect kernel stack overflows.
Stack overflows can not be detected reliable since we do not want to
introduce too much overhead.
Instead, during irq processing in do_cpu_irq_mask() we check kernel
stack usage of the interrupted kernel process. Kernel threads can be
easily detected by checking the value of space register 7 (sr7) which
is zero when running inside the kernel.
Since THREAD_SIZE is 16k and PAGE_SIZE is 4k, reduce the alignment of
the init thread to the lower value (PAGE_SIZE) in the kernel
vmlinux.ld.S linker script.
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Hante Meuleman [Mon, 27 May 2013 19:09:53 +0000 (21:09 +0200)]
brcmfmac: Turn off ARP offloading when configured for AP.
commit
b3657453f16a7b84eab9b93bb9a9a2901ffc70af upstream.
ARP offloading should only be used in STA or P2P client mode. It
is currently configured once at init. When being configured for AP
ARP offloading should be turned off and when AP mode is left it can
be turned back on.
Reviewed-by: Arend Van Spriel <arend@broadcom.com>
Signed-off-by: Hante Meuleman <meuleman@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Larry Finger [Thu, 30 May 2013 23:05:55 +0000 (18:05 -0500)]
rtlwifi: rtl8192cu: Fix problem in connecting to WEP or WPA(1) networks
commit
5b8df24e22e0b00b599cb9ae63dbb96e1959be30 upstream.
Driver rtl8192cu can connect to WPA2 networks, but fails for any other
encryption method. The cause is a failure to set the rate control data
blocks. These changes fix https://bugzilla.redhat.com/show_bug.cgi?id=952793
and https://bugzilla.redhat.com/show_bug.cgi?id=761525.
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Chris Metcalf [Sat, 15 Jun 2013 20:47:47 +0000 (16:47 -0400)]
tilepro: work around module link error with gcc 4.7
commit
3cb3f839d306443f3d1e79b0bde1a2ad2c12b555 upstream.
gcc 4.7.x is emitting calls to __ffsdi2 where previously
it used to inline the appropriate ctz instructions.
While this needs to be fixed in gcc, it's also easy to avoid
having it cause build failures when building with those
compilers by exporting __ffsdi2 to modules.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Lai Jiangshan [Mon, 3 Jun 2013 09:17:15 +0000 (17:17 +0800)]
clk: remove notifier from list before freeing it
commit
72b5322f11ff0abf6a52b3007486656578d2c982 upstream.
The @cn is stay in @clk_notifier_list after it is freed, it cause
memory corruption.
Example, if @clk is registered(first), unregistered(first),
registered(second), unregistered(second).
The freed @cn will be used when @clk is registered(second),
and the bug will be happened when @clk is unregistered(second):
[ 517.040000] clk_notif_dbg clk_notif_dbg.1: clk_notifier_unregister()
[ 517.040000] Unable to handle kernel paging request at virtual address
00df3008
[ 517.050000] pgd =
ed858000
[ 517.050000] [
00df3008] *pgd=
00000000
[ 517.060000] Internal error: Oops: 5 [#1] PREEMPT SMP ARM
[ 517.060000] Modules linked in: clk_notif_dbg(O-) [last unloaded: clk_notif_dbg]
[ 517.060000] CPU: 1 PID: 499 Comm: modprobe Tainted: G O
3.10.0-rc3-00119-ga93cb29-dirty #85
[ 517.060000] task:
ee1e0180 ti:
ee3e6000 task.ti:
ee3e6000
[ 517.060000] PC is at srcu_readers_seq_idx+0x48/0x84
[ 517.060000] LR is at srcu_readers_seq_idx+0x60/0x84
[ 517.060000] pc : [<
c0052720>] lr : [<
c0052738>] psr:
80070013
[ 517.060000] sp :
ee3e7d48 ip :
00000000 fp :
ee3e7d6c
[ 517.060000] r10:
00000000 r9 :
ee3e6000 r8 :
00000000
[ 517.060000] r7 :
ed84fe4c r6 :
c068ec90 r5 :
c068e430 r4 :
00000000
[ 517.060000] r3 :
00df3000 r2 :
00000000 r1 :
00000002 r0 :
00000000
[ 517.060000] Flags: Nzcv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user
[ 517.060000] Control:
18c5387d Table:
2d85804a DAC:
00000015
[ 517.060000] Process modprobe (pid: 499, stack limit = 0xee3e6238)
[ 517.060000] Stack: (0xee3e7d48 to 0xee3e8000)
....
[ 517.060000] [<
c0052720>] (srcu_readers_seq_idx+0x48/0x84) from [<
c0052790>] (try_check_zero+0x34/0xfc)
[ 517.060000] [<
c0052790>] (try_check_zero+0x34/0xfc) from [<
c00528b0>] (srcu_advance_batches+0x58/0x114)
[ 517.060000] [<
c00528b0>] (srcu_advance_batches+0x58/0x114) from [<
c0052c30>] (__synchronize_srcu+0x114/0x1ac)
[ 517.060000] [<
c0052c30>] (__synchronize_srcu+0x114/0x1ac) from [<
c0052d14>] (synchronize_srcu+0x2c/0x34)
[ 517.060000] [<
c0052d14>] (synchronize_srcu+0x2c/0x34) from [<
c0053a08>] (srcu_notifier_chain_unregister+0x68/0x74)
[ 517.060000] [<
c0053a08>] (srcu_notifier_chain_unregister+0x68/0x74) from [<
c0375a78>] (clk_notifier_unregister+0x7c/0xc0)
[ 517.060000] [<
c0375a78>] (clk_notifier_unregister+0x7c/0xc0) from [<
bf008034>] (clk_notif_dbg_remove+0x34/0x9c [clk_notif_dbg])
[ 517.060000] [<
bf008034>] (clk_notif_dbg_remove+0x34/0x9c [clk_notif_dbg]) from [<
c02bb974>] (platform_drv_remove+0x24/0x28)
[ 517.060000] [<
c02bb974>] (platform_drv_remove+0x24/0x28) from [<
c02b9bf8>] (__device_release_driver+0x8c/0xd4)
[ 517.060000] [<
c02b9bf8>] (__device_release_driver+0x8c/0xd4) from [<
c02ba680>] (driver_detach+0x9c/0xc4)
[ 517.060000] [<
c02ba680>] (driver_detach+0x9c/0xc4) from [<
c02b99c4>] (bus_remove_driver+0xcc/0xfc)
[ 517.060000] [<
c02b99c4>] (bus_remove_driver+0xcc/0xfc) from [<
c02bace4>] (driver_unregister+0x54/0x78)
[ 517.060000] [<
c02bace4>] (driver_unregister+0x54/0x78) from [<
c02bbb44>] (platform_driver_unregister+0x1c/0x20)
[ 517.060000] [<
c02bbb44>] (platform_driver_unregister+0x1c/0x20) from [<
bf0081f8>] (clk_notif_dbg_driver_exit+0x14/0x1c [clk_notif_dbg])
[ 517.060000] [<
bf0081f8>] (clk_notif_dbg_driver_exit+0x14/0x1c [clk_notif_dbg]) from [<
c00835e4>] (SyS_delete_module+0x200/0x28c)
[ 517.060000] [<
c00835e4>] (SyS_delete_module+0x200/0x28c) from [<
c000edc0>] (ret_fast_syscall+0x0/0x48)
[ 517.060000] Code:
e5973004 e7911102 e0833001 e2881002 (
e7933101)
Reported-by: Sören Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Tested-by: Sören Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
[mturquette@linaro.org: shortened $SUBJECT]
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Clemens Ladisch [Sat, 15 Jun 2013 09:21:09 +0000 (11:21 +0200)]
ALSA: usb-audio: work around Android accessory firmware bug
commit
342cda29343a6272c630f94ed56810a76740251b upstream.
When the Android firmware enables the audio interfaces in accessory
mode, it always declares in the control interface's baInterfaceNr array
that interfaces 0 and 1 belong to the audio function. However, the
accessory interface itself, if also enabled, already is at index 0 and
shifts the actual audio interface numbers to 1 and 2, which prevents the
PCM streaming interface from being seen by the host driver.
To get the PCM interface interface to work, detect when the descriptors
point to the (for this driver useless) accessory interface, and redirect
to the correct one.
Reported-by: Jeremy Rosen <jeremy.rosen@openwide.fr>
Tested-by: Jeremy Rosen <jeremy.rosen@openwide.fr>
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Takashi Iwai [Mon, 17 Jun 2013 08:19:49 +0000 (10:19 +0200)]
ALSA: hda - Fix pin configurations for MacBook Air 4,2
commit
6ab982e8cf8e5760da407ccdc4abc815bea23179 upstream.
MacBook Air 4,2 requires the whole default pin configuration table to
be overridden by the driver, as usual, as Apple's machines don't set
up properly after boot. Otherwise mic won't work, and other ill
effect may happen.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=59381
Reported-and-tested-by: Peter John Hartman <peterjohnhartman@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Takashi Iwai [Mon, 17 Jun 2013 08:25:02 +0000 (10:25 +0200)]
ALSA: usb-audio: Fix invalid volume resolution for Logitech HD Webcam c310
commit
36691e1be6ec551eef4a5225f126a281f8c051c2 upstream.
Just like the previous fix for LogitechHD Webcam c270 in commit
11e7064f35bb87da8f427d1aa4bbd8b7473a3993, c310 model also requires the
same workaround for avoiding the kernel warning.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=59741
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jed Davis [Thu, 20 Jun 2013 03:07:14 +0000 (04:07 +0100)]
perf: arm64: Record the user-mode PC in the call chain.
commit
abc41254181e901ef5eda2c884ca6cd88a186b6d upstream.
With this change, we no longer lose the innermost entry in the user-mode
part of the call chain. See also the x86 port, which includes the ip,
and the corresponding change in arch/arm.
Signed-off-by: Jed Davis <jld@mozilla.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Gregory CLEMENT [Mon, 10 Jun 2013 17:05:51 +0000 (18:05 +0100)]
ARM: 7754/1: Fix the CPU ID and the mask associated to the PJ4B
commit
049be07053ebbf0ee8543caea23ae7bdf0765bb2 upstream.
This commit fixes the ID and mask for the PJ4B which was too
restrictive and didn't match the CPU of the Armada 370 SoC.
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Reviewed-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jon Medhurst [Fri, 7 Jun 2013 09:35:35 +0000 (10:35 +0100)]
ARM: 7752/1: errata: LoUIS bit field in CLIDR register is incorrect
commit
691557941af4c12bd307ad81a4d9fa9c7743ac28 upstream.
On Cortex-A9 before version r1p0, the LoUIS bit field of the CLIDR
register returns zero when it should return one. This leads to cache
maintenance operations which rely on this value to not function as
intended, causing data corruption.
The workaround for this errata is to detect affected CPUs and correct
the LoUIS value read.
Acked-by: Will Deacon <will.deacon@arm.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Jon Medhurst <tixy@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Greg Kroah-Hartman [Thu, 20 Jun 2013 19:01:46 +0000 (12:01 -0700)]
Linux 3.9.7
Nicolas Schichan [Thu, 6 Jun 2013 17:00:46 +0000 (19:00 +0200)]
ARM: Kirkwood: handle mv88f6282 cpu in __kirkwood_variant().
commit
4089fe95bfed295c8ad38251d5fe02b6b0ba684c upstream.
MPP_F6281_MASK would be previously be returned when on mv88f6282,
which would disallow some valid MPP configurations.
Commit
830f8b91 (arm: plat-orion: fix printing of "MPP config
unavailable on this hardware") made this problem visible as an invalid
MPP configuration is now correctly detected and not applied.
Signed-off-by: Nicolas Schichan <nschichan@freebox.fr>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Nithin Sujir [Wed, 12 Jun 2013 18:08:59 +0000 (11:08 -0700)]
tg3: Wait for boot code to finish after power on
commit
df465abfe06f7dc4f33f4a96d17f096e9e8ac917 upstream.
Some systems that don't need wake-on-lan may choose to power down the
chip on system standby. Upon resume, the power on causes the boot code
to startup and initialize the hardware. On one new platform, this is
causing the device to go into a bad state due to a race between the
driver and boot code, once every several hundred resumes. The same race
exists on open since we come up from a power on.
This patch adds a wait for boot code signature at the beginning of
tg3_init_hw() which is common to both cases. If there has not been a
power-off or the boot code has already completed, the signature will be
present and poll_fw() returns immediately. Also return immediately if
the device does not have firmware.
Signed-off-by: Nithin Nayak Sujir <nsujir@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Johan Hovold [Mon, 10 Jun 2013 16:29:39 +0000 (18:29 +0200)]
USB: spcp8x5: fix device initialisation at open
commit
5e4211f1c47560c36a8b3d4544dfd866dcf7ccd0 upstream.
Do not use uninitialised termios data to determine when to configure the
device at open.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Johan Hovold [Mon, 10 Jun 2013 16:29:37 +0000 (18:29 +0200)]
USB: f81232: fix device initialisation at open
commit
21886725d58e92188159731c7c1aac803dd6b9dc upstream.
Do not use uninitialised termios data to determine when to configure the
device at open.
This also prevents stack data from leaking to userspace.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Johan Hovold [Mon, 10 Jun 2013 16:29:38 +0000 (18:29 +0200)]
USB: pl2303: fix device initialisation at open
commit
2d8f4447b58bba5f8cb895c07690434c02307eaf upstream.
Do not use uninitialised termios data to determine when to configure the
device at open.
This also prevents stack data from leaking to userspace in the OOM error
path.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Alexander Shishkin [Tue, 11 Jun 2013 10:41:48 +0000 (13:41 +0300)]
usb: chipidea: fix id change handling
commit
0c3f3dc68bb6e6950e8cd7851e7778c550e8dfb4 upstream.
Re-enable chipidea irq even if there's no role changing to do. This is
a problem since
b183c19f ("USB: chipidea: re-order irq handling to avoid
unhandled irqs"); when it manifests, chipidea irq gets disabled for good.
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Benjamin Herrenschmidt [Sat, 15 Jun 2013 02:13:40 +0000 (12:13 +1000)]
powerpc: Fix missing/delayed calls to irq_work
commit
230b3034793247f61e6a0b08c44cf415f6d92981 upstream.
When replaying interrupts (as a result of the interrupt occurring
while soft-disabled), in the case of the decrementer, we are exclusively
testing for a pending timer target. However we also use decrementer
interrupts to trigger the new "irq_work", which in this case would
be missed.
This change the logic to force a replay in both cases of a timer
boundary reached and a decrementer interrupt having actually occurred
while disabled. The former test is still useful to catch cases where
a CPU having been hard-disabled for a long time completely misses the
interrupt due to a decrementer rollover.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Tested-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Paul Mackerras [Fri, 14 Jun 2013 10:07:41 +0000 (20:07 +1000)]
powerpc: Fix emulation of illegal instructions on PowerNV platform
commit
bf593907f7236e95698a76b7c7a2bbf8b1165327 upstream.
Normally, the kernel emulates a few instructions that are unimplemented
on some processors (e.g. the old dcba instruction), or privileged (e.g.
mfpvr). The emulation of unimplemented instructions is currently not
working on the PowerNV platform. The reason is that on these machines,
unimplemented and illegal instructions cause a hypervisor emulation
assist interrupt, rather than a program interrupt as on older CPUs.
Our vector for the emulation assist interrupt just calls
program_check_exception() directly, without setting the bit in SRR1
that indicates an illegal instruction interrupt. This fixes it by
making the emulation assist interrupt set that bit before calling
program_check_interrupt(). With this, old programs that use no-longer
implemented instructions such as dcba now work again.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Michael Ellerman [Thu, 13 Jun 2013 11:04:56 +0000 (21:04 +1000)]
powerpc: Fix stack overflow crash in resume_kernel when ftracing
commit
0e37739b1c96d65e6433998454985de994383019 upstream.
It's possible for us to crash when running with ftrace enabled, eg:
Bad kernel stack pointer
bffffd12 at
c00000000000a454
cpu 0x3: Vector: 300 (Data Access) at [
c00000000ffe3d40]
pc:
c00000000000a454: resume_kernel+0x34/0x60
lr:
c00000000000335c: performance_monitor_common+0x15c/0x180
sp:
bffffd12
msr:
8000000000001032
dar:
bffffd12
dsisr:
42000000
If we look at current's stack (paca->__current->stack) we see it is
equal to
c0000002ecab0000. Our stack is 16K, and comparing to
paca->kstack (
c0000002ecab3e30) we can see that we have overflowed our
kernel stack. This leads to us writing over our struct thread_info, and
in this case we have corrupted thread_info->flags and set
_TIF_EMULATE_STACK_STORE.
Dumping the stack we see:
3:mon> t
c0000002ecab0000
[
c0000002ecab0000]
c00000000002131c .performance_monitor_exception+0x5c/0x70
[
c0000002ecab0080]
c00000000000335c performance_monitor_common+0x15c/0x180
--- Exception: f01 (Performance Monitor) at
c0000000000fb2ec .trace_hardirqs_off+0x1c/0x30
[
c0000002ecab0370]
c00000000016fdb0 .trace_graph_entry+0xb0/0x280 (unreliable)
[
c0000002ecab0410]
c00000000003d038 .prepare_ftrace_return+0x98/0x130
[
c0000002ecab04b0]
c00000000000a920 .ftrace_graph_caller+0x14/0x28
[
c0000002ecab0520]
c0000000000d6b58 .idle_cpu+0x18/0x90
[
c0000002ecab05a0]
c00000000000a934 .return_to_handler+0x0/0x34
[
c0000002ecab0620]
c00000000001e660 .timer_interrupt+0x160/0x300
[
c0000002ecab06d0]
c0000000000025dc decrementer_common+0x15c/0x180
--- Exception: 901 (Decrementer) at
c0000000000104d4 .arch_local_irq_restore+0x74/0xa0
[
c0000002ecab09c0]
c0000000000fe044 .trace_hardirqs_on+0x14/0x30 (unreliable)
[
c0000002ecab0fb0]
c00000000016fe3c .trace_graph_entry+0x13c/0x280
[
c0000002ecab1050]
c00000000003d038 .prepare_ftrace_return+0x98/0x130
[
c0000002ecab10f0]
c00000000000a920 .ftrace_graph_caller+0x14/0x28
[
c0000002ecab1160]
c0000000000161f0 .__ppc64_runlatch_on+0x10/0x40
[
c0000002ecab11d0]
c00000000000a934 .return_to_handler+0x0/0x34
--- Exception: 901 (Decrementer) at
c0000000000104d4 .arch_local_irq_restore+0x74/0xa0
... and so on
__ppc64_runlatch_on() is called from RUNLATCH_ON in the exception entry
path. At that point the irq state is not consistent, ie. interrupts are
hard disabled (by the exception entry), but the paca soft-enabled flag
may be out of sync.
This leads to the local_irq_restore() in trace_graph_entry() actually
enabling interrupts, which we do not want. Because we have not yet
reprogrammed the decrementer we immediately take another decrementer
exception, and recurse.
The fix is twofold. Firstly make sure we call DISABLE_INTS before
calling RUNLATCH_ON. The badly named DISABLE_INTS actually reconciles
the irq state in the paca with the hardware, making it safe again to
call local_irq_save/restore().
Although that should be sufficient to fix the bug, we also mark the
runlatch routines as notrace. They are called very early in the
exception entry and we are asking for trouble tracing them. They are
also fairly uninteresting and tracing them just adds unnecessary
overhead.
[ This regression was introduced by
fe1952fc0afb9a2e4c79f103c08aef5d13db1873
"powerpc: Rework runlatch code" by myself --BenH
]
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Matthew Garrett [Sat, 1 Jun 2013 20:06:20 +0000 (16:06 -0400)]
Modify UEFI anti-bricking code
commit
f8b8404337de4e2466e2e1139ea68b1f8295974f upstream.
This patch reworks the UEFI anti-bricking code, including an effective
reversion of
cc5a080c and
31ff2f20. It turns out that calling
QueryVariableInfo() from boot services results in some firmware
implementations jumping to physical addresses even after entering virtual
mode, so until we have 1:1 mappings for UEFI runtime space this isn't
going to work so well.
Reverting these gets us back to the situation where we'd refuse to create
variables on some systems because they classify deleted variables as "used"
until the firmware triggers a garbage collection run, which they won't do
until they reach a lower threshold. This results in it being impossible to
install a bootloader, which is unhelpful.
Feedback from Samsung indicates that the firmware doesn't need more than
5KB of storage space for its own purposes, so that seems like a reasonable
threshold. However, there's still no guarantee that a platform will attempt
garbage collection merely because it drops below this threshold. It seems
that this is often only triggered if an attempt to write generates a
genuine EFI_OUT_OF_RESOURCES error. We can force that by attempting to
create a variable larger than the remaining space. This should fail, but if
it somehow succeeds we can then immediately delete it.
I've tested this on the UEFI machines I have available, but I don't have
a Samsung and so can't verify that it avoids the bricking problem.
Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
Signed-off-by: Lee, Chun-Y <jlee@suse.com> [ dummy variable cleanup ]
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Sage Weil [Mon, 25 Mar 2013 17:26:30 +0000 (10:26 -0700)]
libceph: wrap auth methods in a mutex
commit
e9966076cdd952e19f2dd4854cd719be0d7cbebc upstream.
The auth code is called from a variety of contexts, include the mon_client
(protected by the monc's mutex) and the messenger callbacks (currently
protected by nothing). Avoid chaos by protecting all auth state with a
mutex. Nothing is blocking, so this should be simple and lightweight.
Signed-off-by: Sage Weil <sage@inktank.com>
Reviewed-by: Alex Elder <elder@inktank.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Sage Weil [Mon, 25 Mar 2013 17:26:14 +0000 (10:26 -0700)]
libceph: wrap auth ops in wrapper functions
commit
27859f9773e4a0b2042435b13400ee2c891a61f4 upstream.
Use wrapper functions that check whether the auth op exists so that callers
do not need a bunch of conditional checks. Simplifies the external
interface.
Signed-off-by: Sage Weil <sage@inktank.com>
Reviewed-by: Alex Elder <elder@inktank.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Sage Weil [Mon, 25 Mar 2013 17:26:01 +0000 (10:26 -0700)]
libceph: add update_authorizer auth method
commit
0bed9b5c523d577378b6f83eab5835fe30c27208 upstream.
Currently the messenger calls out to a get_authorizer con op, which will
create a new authorizer if it doesn't yet have one. In the meantime, when
we rotate our service keys, the authorizer doesn't get updated. Eventually
it will be rejected by the server on a new connection attempt and get
invalidated, and we will then rebuild a new authorizer, but this is not
ideal.
Instead, if we do have an authorizer, call a new update_authorizer op that
will verify that the current authorizer is using the latest secret. If it
is not, we will build a new one that does. This avoids the transient
failure.
This fixes one of the sorry sequence of events for bug
http://tracker.ceph.com/issues/4282
Signed-off-by: Sage Weil <sage@inktank.com>
Reviewed-by: Alex Elder <elder@inktank.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Sage Weil [Mon, 25 Mar 2013 17:25:49 +0000 (10:25 -0700)]
libceph: fix authorizer invalidation
commit
4b8e8b5d78b8322351d44487c1b76f7e9d3412bc upstream.
We were invalidating the authorizer by removing the ticket handler
entirely. This was effective in inducing us to request a new authorizer,
but in the meantime it mean that any authorizer we generated would get a
new and initialized handler with secret_id=0, which would always be
rejected by the server side with a confusing error message:
auth: could not find secret_id=0
cephx: verify_authorizer could not get service secret for service osd secret_id=0
Instead, simply clear the validity field. This will still induce the auth
code to request a new secret, but will let us continue to use the old
ticket in the meantime. The messenger code will probably continue to fail,
but the exponential backoff will kick in, and eventually the we will get a
new (hopefully more valid) ticket from the mon and be able to continue.
Signed-off-by: Sage Weil <sage@inktank.com>
Reviewed-by: Alex Elder <elder@inktank.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Sage Weil [Mon, 25 Mar 2013 16:30:13 +0000 (09:30 -0700)]
libceph: clear messenger auth_retry flag when we authenticate
commit
20e55c4cc758e4dccdfd92ae8e9588dd624b2cd7 upstream.
We maintain a counter of failed auth attempts to allow us to retry once
before failing. However, if the second attempt succeeds, the flag isn't
cleared, which makes us think auth failed again later when the connection
resets for other reasons (like a socket error).
This is one part of the sorry sequence of events in bug
http://tracker.ceph.com/issues/4282
Signed-off-by: Sage Weil <sage@inktank.com>
Reviewed-by: Alex Elder <elder@inktank.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ben Skeggs [Mon, 3 Jun 2013 06:40:14 +0000 (16:40 +1000)]
drm/nv50/kms: use dac loadval from vbios, where it's available
commit
d40ee48acde16894fb3b241d7e896d5fa84e0f10 upstream.
Regression from merging the old nv50/nvd9 code together, and may be
needed to fully fix fdo#64904.
The value is ignored completely by the hardware starting from nva3.
Reported-by: Emil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Ben Skeggs [Mon, 3 Jun 2013 06:07:06 +0000 (16:07 +1000)]
drm/nv50/disp: force dac power state during load detect
commit
ea9197cc323839ef3d5280c0453b2c622caa6bc7 upstream.
fdo#64904
Reported-by: Gerhard Bräunlich <wippbox@gmx.net>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Kees Cook [Wed, 5 Jun 2013 18:47:18 +0000 (11:47 -0700)]
x86: Fix typo in kexec register clearing
commit
c8a22d19dd238ede87aa0ac4f7dbea8da039b9c1 upstream.
Fixes a typo in register clearing code. Thanks to PaX Team for fixing
this originally, and James Troup for pointing it out.
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: http://lkml.kernel.org/r/20130605184718.GA8396@www.outflux.net
Cc: PaX Team <pageexec@freemail.hu>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Yinghai Lu [Fri, 31 May 2013 15:53:07 +0000 (08:53 -0700)]
x86: Fix adjust_range_size_mask calling position
commit
7de3d66b1387ddf5a37d9689e5eb8510fb75c765 upstream.
Commit
8d57470d x86, mm: setup page table in top-down
causes a kernel panic while setting mem=2G.
[mem 0x00000000-0x000fffff] page 4k
[mem 0x7fe00000-0x7fffffff] page 1G
[mem 0x7c000000-0x7fdfffff] page 1G
[mem 0x00100000-0x001fffff] page 4k
[mem 0x00200000-0x7bffffff] page 2M
for last entry is not what we want, we should have
[mem 0x00200000-0x3fffffff] page 2M
[mem 0x40000000-0x7bffffff] page 1G
Actually we merge the continuous ranges with same page size too early.
in this case, before merging we have
[mem 0x00200000-0x3fffffff] page 2M
[mem 0x40000000-0x7bffffff] page 2M
after merging them, will get
[mem 0x00200000-0x7bffffff] page 2M
even we can use 1G page to map
[mem 0x40000000-0x7bffffff]
that will cause problem, because we already map
[mem 0x7fe00000-0x7fffffff] page 1G
[mem 0x7c000000-0x7fdfffff] page 1G
with 1G page, aka [0x40000000-0x7fffffff] is mapped with 1G page already.
During phys_pud_init() for [0x40000000-0x7bffffff], it will not
reuse existing that pud page, and allocate new one then try to use
2M page to map it instead, as page_size_mask does not include
PG_LEVEL_1G. At end will have [
7c000000-0x7fffffff] not mapped, loop
in phys_pmd_init stop mapping at 0x7bffffff.
That is right behavoir, it maps exact range with exact page size that
we ask, and we should explicitly call it to map [
7c000000-0x7fffffff]
before or after mapping 0x40000000-0x7bffffff.
Anyway we need to make sure ranges' page_size_mask correct and consistent
after split_mem_range for each range.
Fix that by calling adjust_range_size_mask before merging range
with same page size.
-v2: update change log.
-v3: add more explanation why [
7c000000-0x7fffffff] is not mapped, and
it causes panic.
Bisected-by: "Xie, ChanglongX" <changlongx.xie@intel.com>
Bisected-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
Reported-and-tested-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/1370015587-20835-1-git-send-email-yinghai@kernel.org
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Naoya Horiguchi [Wed, 12 Jun 2013 21:05:04 +0000 (14:05 -0700)]
mm: migration: add migrate_entry_wait_huge()
commit
30dad30922ccc733cfdbfe232090cf674dc374dc upstream.
When we have a page fault for the address which is backed by a hugepage
under migration, the kernel can't wait correctly and do busy looping on
hugepage fault until the migration finishes. As a result, users who try
to kick hugepage migration (via soft offlining, for example) occasionally
experience long delay or soft lockup.
This is because pte_offset_map_lock() can't get a correct migration entry
or a correct page table lock for hugepage. This patch introduces
migration_entry_wait_huge() to solve this.
Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Reviewed-by: Rik van Riel <riel@redhat.com>
Reviewed-by: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: KOSAKI Motohiro <kosaki.motohiro@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@linuxfoundation.org>
Tomasz Stanislawski [Wed, 12 Jun 2013 21:05:02 +0000 (14:05 -0700)]
mm/page_alloc.c: fix watermark check in __zone_watermark_ok()
commit
026b08147923142e925a7d0aaa39038055ae0156 upstream.
The watermark check consists of two sub-checks. The first one is:
if (free_pages <= min + lowmem_reserve)
return false;
The check assures that there is minimal amount of RAM in the zone. If
CMA is used then the free_pages is reduced by the number of free pages
in CMA prior to the over-mentioned check.
if (!(alloc_flags & ALLOC_CMA))
free_pages -= zone_page_state(z, NR_FREE_CMA_PAGES);
This prevents the zone from being drained from pages available for
non-movable allocations.
The second check prevents the zone from getting too fragmented.
for (o = 0; o < order; o++) {
free_pages -= z->free_area[o].nr_free << o;
min >>= 1;
if (free_pages <= min)
return false;
}
The field z->free_area[o].nr_free is equal to the number of free pages
including free CMA pages. Therefore the CMA pages are subtracted twice.
This may cause a false positive fail of __zone_watermark_ok() if the CMA
area gets strongly fragmented. In such a case there are many 0-order
free pages located in CMA. Those pages are subtracted twice therefore
they will quickly drain free_pages during the check against
fragmentation. The test fails even though there are many free non-cma
pages in the zone.
This patch fixes this issue by subtracting CMA pages only for a purpose of
(free_pages <= min + lowmem_reserve) check.
Laura said:
We were observing allocation failures of higher order pages (order 5 =
128K typically) under tight memory conditions resulting in driver
failure. The output from the page allocation failure showed plenty of
free pages of the appropriate order/type/zone and mostly CMA pages in
the lower orders.
For full disclosure, we still observed some page allocation failures
even after applying the patch but the number was drastically reduced and
those failures were attributed to fragmentation/other system issues.
Signed-off-by: Tomasz Stanislawski <t.stanislaws@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Tested-by: Laura Abbott <lauraa@codeaurora.org>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Cc: Mel Gorman <mel@csn.ul.ie>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.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@linuxfoundation.org>
NeilBrown [Wed, 12 Jun 2013 01:01:22 +0000 (11:01 +1000)]
md/raid1,raid10: use freeze_array in place of raise_barrier in various places.
commit
e2d59925221cd562e07fee38ec8839f7209ae603 upstream.
Various places in raid1 and raid10 are calling raise_barrier when they
really should call freeze_array.
The former is only intended to be called from "make_request".
The later has extra checks for 'nr_queued' and makes a call to
flush_pending_writes(), so it is safe to call it from within the
management thread.
Using raise_barrier will sometimes deadlock. Using freeze_array
should not.
As 'freeze_array' currently expects one request to be pending (in
handle_read_error - the only previous caller), we need to pass
it the number of pending requests (extra) to ignore.
The deadlock was made particularly noticeable by commits
050b66152f87c7 (raid10) and
6b740b8d79252f13 (raid1) which
appeared in 3.4, so the fix is appropriate for any -stable
kernel since then.
This patch probably won't apply directly to some early kernels and
will need to be applied by hand.
Reported-by: Alexander Lyakas <alex.bolshoy@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
H. Peter Anvin [Wed, 12 Jun 2013 14:37:43 +0000 (07:37 -0700)]
md/raid1,5,10: Disable WRITE SAME until a recovery strategy is in place
commit
5026d7a9b2f3eb1f9bda66c18ac6bc3036ec9020 upstream.
There are cases where the kernel will believe that the WRITE SAME
command is supported by a block device which does not, in fact,
support WRITE SAME. This currently happens for SATA drivers behind a
SAS controller, but there are probably a hundred other ways that can
happen, including drive firmware bugs.
After receiving an error for WRITE SAME the block layer will retry the
request as a plain write of zeroes, but mdraid will consider the
failure as fatal and consider the drive failed. This has the effect
that all the mirrors containing a specific set of data are each
offlined in very rapid succession resulting in data loss.
However, just bouncing the request back up to the block layer isn't
ideal either, because the whole initial request-retry sequence should
be inside the write bitmap fence, which probably means that md needs
to do its own conversion of WRITE SAME to write zero.
Until the failure scenario has been sorted out, disable WRITE SAME for
raid1, raid5, and raid10.
[neilb: added raid5]
This patch is appropriate for any -stable since 3.7 when write_same
support was added.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Alex Lyakas [Tue, 4 Jun 2013 17:42:21 +0000 (20:42 +0300)]
md/raid1: consider WRITE as successful only if at least one non-Faulty and non-rebuilding drive completed it.
commit
3056e3aec8d8ba61a0710fb78b2d562600aa2ea7 upstream.
Without that fix, the following scenario could happen:
- RAID1 with drives A and B; drive B was freshly-added and is rebuilding
- Drive A fails
- WRITE request arrives to the array. It is failed by drive A, so
r1_bio is marked as R1BIO_WriteError, but the rebuilding drive B
succeeds in writing it, so the same r1_bio is marked as
R1BIO_Uptodate.
- r1_bio arrives to handle_write_finished, badblocks are disabled,
md_error()->error() does nothing because we don't fail the last drive
of raid1
- raid_end_bio_io() calls call_bio_endio()
- As a result, in call_bio_endio():
if (!test_bit(R1BIO_Uptodate, &r1_bio->state))
clear_bit(BIO_UPTODATE, &bio->bi_flags);
this code doesn't clear the BIO_UPTODATE flag, and the whole master
WRITE succeeds, back to the upper layer.
So we returned success to the upper layer, even though we had written
the data onto the rebuilding drive only. But when we want to read the
data back, we would not read from the rebuilding drive, so this data
is lost.
[neilb - applied identical change to raid10 as well]
This bug can result in lost data, so it is suitable for any
-stable kernel.
Signed-off-by: Alex Lyakas <alex@zadarastorage.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Rafael Aquini [Wed, 12 Jun 2013 21:04:49 +0000 (14:04 -0700)]
swap: avoid read_swap_cache_async() race to deadlock while waiting on discard I/O completion
commit
cbab0e4eec299e9059199ebe6daf48730be46d2b upstream.
read_swap_cache_async() can race against get_swap_page(), and stumble
across a SWAP_HAS_CACHE entry in the swap map whose page wasn't brought
into the swapcache yet.
This transient swap_map state is expected to be transitory, but the
actual placement of discard at scan_swap_map() inserts a wait for I/O
completion thus making the thread at read_swap_cache_async() to loop
around its -EEXIST case, while the other end at get_swap_page() is
scheduled away at scan_swap_map(). This can leave the system deadlocked
if the I/O completion happens to be waiting on the CPU waitqueue where
read_swap_cache_async() is busy looping and !CONFIG_PREEMPT.
This patch introduces a cond_resched() call to make the aforementioned
read_swap_cache_async() busy loop condition to bail out when necessary,
thus avoiding the subtle race window.
Signed-off-by: Rafael Aquini <aquini@redhat.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Acked-by: Hugh Dickins <hughd@google.com>
Cc: Shaohua Li <shli@kernel.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@linuxfoundation.org>
Daniel Vetter [Mon, 10 Jun 2013 07:47:58 +0000 (09:47 +0200)]
drm/i915: prefer VBT modes for SVDO-LVDS over EDID
commit
c3456fb3e4712d0448592af3c5d644c9472cd3c1 upstream.
In
commit
53d3b4d7778daf15900867336c85d3f8dd70600c
Author: Egbert Eich <eich@suse.de>
Date: Tue Jun 4 17:13:21 2013 +0200
drm/i915/sdvo: Use &intel_sdvo->ddc instead of intel_sdvo->i2c for DDC
Egbert Eich fixed a long-standing bug where we simply used a
non-working i2c controller to read the EDID for SDVO-LVDS panels.
Unfortunately some machines seem to not be able to cope with the mode
provided in the EDID. Specifically they seem to not be able to cope
with a 4x pixel mutliplier instead of a 2x one, which seems to have
been worked around by slightly changing the panels native mode in the
VBT so that the dotclock is just barely above 50MHz.
Since it took forever to notice the breakage it's fairly safe to
assume that at least for SDVO-LVDS panels the VBT contains fairly sane
data. So just switch around the order and use VBT modes first.
v2: Also add EDID modes just in case, and spell Egbert correctly.
v3: Elaborate a bit more about what's going on on Chris' machine.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=65524
Reported-and-tested-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Egbert Eich <eich@suse.de>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Luciano Coelho [Fri, 10 May 2013 07:19:38 +0000 (10:19 +0300)]
wl12xx: fix minimum required firmware version for wl127x multirole
commit
60c28cf18f970e1c1bd40d615596eeab6efbd9d7 upstream.
There was a typo in commit 8675f9 (wlcore/wl12xx/wl18xx: verify
multi-role and single-role fw versions), which was causing the
multirole firmware for wl127x (WiLink6) to be rejected. The actual
minimum version needed for wl127x multirole is 6.5.7.0.42.
Reported-by: Levi Pearson <levipearson@gmail.com>
Reported-by: Michael Scott <hashcode0f@gmail.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Andrey Vagin [Wed, 12 Jun 2013 21:04:42 +0000 (14:04 -0700)]
memcg: don't initialize kmem-cache destroying work for root caches
commit
f101a9464bfbda42730b54a66f926d75ed2cd31e upstream.
struct memcg_cache_params has a union. Different parts of this union
are used for root and non-root caches. A part with destroying work is
used only for non-root caches.
BUG: unable to handle kernel paging request at
0000000fffffffe0
IP: kmem_cache_alloc+0x41/0x1f0
Modules linked in: netlink_diag af_packet_diag udp_diag tcp_diag inet_diag unix_diag ip6table_filter ip6_tables i2c_piix4 virtio_net virtio_balloon microcode i2c_core pcspkr floppy
CPU: 0 PID: 1929 Comm: lt-vzctl Tainted: G D 3.10.0-rc1+ #2
Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
RIP: kmem_cache_alloc+0x41/0x1f0
Call Trace:
getname_flags.part.34+0x30/0x140
getname+0x38/0x60
do_sys_open+0xc5/0x1e0
SyS_open+0x22/0x30
system_call_fastpath+0x16/0x1b
Code: f4 53 48 83 ec 18 8b 05 8e 53 b7 00 4c 8b 4d 08 21 f0 a8 10 74 0d 4c 89 4d c0 e8 1b 76 4a 00 4c 8b 4d c0 e9 92 00 00 00 4d 89 f5 <4d> 8b 45 00 65 4c 03 04 25 48 cd 00 00 49 8b 50 08 4d 8b 38 49
RIP [<
ffffffff8116b641>] kmem_cache_alloc+0x41/0x1f0
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Cc: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Glauber Costa <glommer@parallels.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Balbir Singh <bsingharora@gmail.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
Cc: Li Zefan <lizefan@huawei.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@linuxfoundation.org>
Stephen M. Cameron [Wed, 12 Jun 2013 21:04:47 +0000 (14:04 -0700)]
cciss: fix broken mutex usage in ioctl
commit
03f47e888daf56c8e9046c674719a0bcc644eed5 upstream.
If a new logical drive is added and the CCISS_REGNEWD ioctl is invoked
(as is normal with the Array Configuration Utility) the process will
hang as below. It attempts to acquire the same mutex twice, once in
do_ioctl() and once in cciss_unlocked_open(). The BKL was recursive,
the mutex isn't.
Linux version 3.10.0-rc2 (scameron@localhost.localdomain) (gcc version 4.4.7
20120313 (Red Hat 4.4.7-3) (GCC) ) #1 SMP Fri May 24 14:32:12 CDT 2013
[...]
acu D
0000000000000001 0 3246 3191 0x00000080
Call Trace:
schedule+0x29/0x70
schedule_preempt_disabled+0xe/0x10
__mutex_lock_slowpath+0x17b/0x220
mutex_lock+0x2b/0x50
cciss_unlocked_open+0x2f/0x110 [cciss]
__blkdev_get+0xd3/0x470
blkdev_get+0x5c/0x1e0
register_disk+0x182/0x1a0
add_disk+0x17c/0x310
cciss_add_disk+0x13a/0x170 [cciss]
cciss_update_drive_info+0x39b/0x480 [cciss]
rebuild_lun_table+0x258/0x370 [cciss]
cciss_ioctl+0x34f/0x470 [cciss]
do_ioctl+0x49/0x70 [cciss]
__blkdev_driver_ioctl+0x28/0x30
blkdev_ioctl+0x200/0x7b0
block_ioctl+0x3c/0x40
do_vfs_ioctl+0x89/0x350
SyS_ioctl+0xa1/0xb0
system_call_fastpath+0x16/0x1b
This mutex usage was added into the ioctl path when the big kernel lock
was removed. As it turns out, these paths are all thread safe anyway
(or can easily be made so) and we don't want ioctl() to be single
threaded in any case.
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Mike Miller <mike.miller@hp.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@linuxfoundation.org>
Kees Cook [Wed, 12 Jun 2013 21:04:39 +0000 (14:04 -0700)]
kmsg: honor dmesg_restrict sysctl on /dev/kmsg
commit
637241a900cbd982f744d44646b48a273d609b34 upstream.
The dmesg_restrict sysctl currently covers the syslog method for access
dmesg, however /dev/kmsg isn't covered by the same protections. Most
people haven't noticed because util-linux dmesg(1) defaults to using the
syslog method for access in older versions. With util-linux dmesg(1)
defaults to reading directly from /dev/kmsg.
To fix /dev/kmsg, let's compare the existing interfaces and what they
allow:
- /proc/kmsg allows:
- open (SYSLOG_ACTION_OPEN) if CAP_SYSLOG since it uses a destructive
single-reader interface (SYSLOG_ACTION_READ).
- everything, after an open.
- syslog syscall allows:
- anything, if CAP_SYSLOG.
- SYSLOG_ACTION_READ_ALL and SYSLOG_ACTION_SIZE_BUFFER, if
dmesg_restrict==0.
- nothing else (EPERM).
The use-cases were:
- dmesg(1) needs to do non-destructive SYSLOG_ACTION_READ_ALLs.
- sysklog(1) needs to open /proc/kmsg, drop privs, and still issue the
destructive SYSLOG_ACTION_READs.
AIUI, dmesg(1) is moving to /dev/kmsg, and systemd-journald doesn't
clear the ring buffer.
Based on the comments in devkmsg_llseek, it sounds like actions besides
reading aren't going to be supported by /dev/kmsg (i.e.
SYSLOG_ACTION_CLEAR), so we have a strict subset of the non-destructive
syslog syscall actions.
To this end, move the check as Josh had done, but also rename the
constants to reflect their new uses (SYSLOG_FROM_CALL becomes
SYSLOG_FROM_READER, and SYSLOG_FROM_FILE becomes SYSLOG_FROM_PROC).
SYSLOG_FROM_READER allows non-destructive actions, and SYSLOG_FROM_PROC
allows destructive actions after a capabilities-constrained
SYSLOG_ACTION_OPEN check.
- /dev/kmsg allows:
- open if CAP_SYSLOG or dmesg_restrict==0
- reading/polling, after open
Addresses https://bugzilla.redhat.com/show_bug.cgi?id=903192
[akpm@linux-foundation.org: use pr_warn_once()]
Signed-off-by: Kees Cook <keescook@chromium.org>
Reported-by: Christian Kujau <lists@nerdbynature.de>
Tested-by: Josh Boyer <jwboyer@redhat.com>
Cc: Kay Sievers <kay@vrfy.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@linuxfoundation.org>
Robin Holt [Wed, 12 Jun 2013 21:04:37 +0000 (14:04 -0700)]
reboot: rigrate shutdown/reboot to boot cpu
commit
cf7df378aa4ff7da3a44769b7ff6e9eef1a9f3db upstream.
We recently noticed that reboot of a 1024 cpu machine takes approx 16
minutes of just stopping the cpus. The slowdown was tracked to commit
f96972f2dc63 ("kernel/sys.c: call disable_nonboot_cpus() in
kernel_restart()").
The current implementation does all the work of hot removing the cpus
before halting the system. We are switching to just migrating to the
boot cpu and then continuing with shutdown/reboot.
This also has the effect of not breaking x86's command line parameter
for specifying the reboot cpu. Note, this code was shamelessly copied
from arch/x86/kernel/reboot.c with bits removed pertaining to the
reboot_cpu command line parameter.
Signed-off-by: Robin Holt <holt@sgi.com>
Tested-by: Shawn Guo <shawn.guo@linaro.org>
Cc: "Srivatsa S. Bhat" <srivatsa.bhat@linux.vnet.ibm.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Russ Anderson <rja@sgi.com>
Cc: Robin Holt <holt@sgi.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
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@linuxfoundation.org>
Srivatsa S. Bhat [Wed, 12 Jun 2013 21:04:36 +0000 (14:04 -0700)]
CPU hotplug: provide a generic helper to disable/enable CPU hotplug
commit
16e53dbf10a2d7e228709a7286310e629ede5e45 upstream.
There are instances in the kernel where we would like to disable CPU
hotplug (from sysfs) during some important operation. Today the freezer
code depends on this and the code to do it was kinda tailor-made for
that.
Restructure the code and make it generic enough to be useful for other
usecases too.
Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Signed-off-by: Robin Holt <holt@sgi.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Russ Anderson <rja@sgi.com>
Cc: Robin Holt <holt@sgi.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Cc: Shawn Guo <shawn.guo@linaro.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@linuxfoundation.org>
Sujith Manoharan [Thu, 6 Jun 2013 04:36:29 +0000 (10:06 +0530)]
ath9k: Use minstrel rate control by default
commit
5efac94999ff218e0101f67a059e44abb4b0b523 upstream.
The ath9k rate control algorithm has various architectural
issues that make it a poor fit in scenarios like congested
environments etc.
An example: https://bugzilla.redhat.com/show_bug.cgi?id=927191
Change the default to minstrel which is more robust in such cases.
The ath9k RC code is left in the driver for now, maybe it can
be removed altogether later on.
Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Cc: Jouni Malinen <jouni@qca.qualcomm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Felix Fietkau [Mon, 3 Jun 2013 09:18:57 +0000 (11:18 +0200)]
Revert "ath9k_hw: Update rx gain initval to improve rx sensitivity"
commit
96005931785238e1a24febf65ffb5016273e8225 upstream.
This reverts commit
68d9e1fa24d9c7c2e527f49df8d18fb8cf0ec943
This change reduces rx sensitivity with no apparent extra benefit.
It looks like it was meant for testing in a specific scenario,
but it was never properly validated.
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Cc: rmanohar@qca.qualcomm.com
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Sujith Manoharan [Sat, 1 Jun 2013 01:38:09 +0000 (07:08 +0530)]
ath9k: Disable PowerSave by default
commit
531671cb17af07281e6f28c1425f754346e65c41 upstream.
Almost all the DMA issues which have plagued ath9k (in station mode)
for years are related to PS. Disabling PS usually "fixes" the user's
connection stablility. Reports of DMA problems are still trickling in
and are sitting in the kernel bugzilla. Until the PS code in ath9k is
given a thorough review, disbale it by default. The slight increase
in chip power consumption is a small price to pay for improved link
stability.
Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Johan Hedberg [Wed, 29 May 2013 06:51:29 +0000 (09:51 +0300)]
Bluetooth: Fix mgmt handling of power on failures
commit
96570ffcca0b872dc8626e97569d2697f374d868 upstream.
If hci_dev_open fails we need to ensure that the corresponding
mgmt_set_powered command gets an appropriate response. This patch fixes
the missing response by adding a new mgmt_set_powered_failed function
that's used to indicate a power on failure to mgmt. Since a situation
with the device being rfkilled may require special handling in user
space the patch uses a new dedicated mgmt status code for this.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Johan Hedberg [Tue, 28 May 2013 10:46:30 +0000 (13:46 +0300)]
Bluetooth: Fix missing length checks for L2CAP signalling PDUs
commit
cb3b3152b2f5939d67005cff841a1ca748b19888 upstream.
There has been code in place to check that the L2CAP length header
matches the amount of data received, but many PDU handlers have not been
checking that the data received actually matches that expected by the
specific PDU. This patch adds passing the length header to the specific
handler functions and ensures that those functions fail cleanly in the
case of an incorrect amount of data.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Patrik Jakobsson [Sat, 8 Jun 2013 18:23:08 +0000 (20:23 +0200)]
drm/gma500/cdv: Unpin framebuffer on crtc disable
commit
22e7c385a80d771aaf3a15ae7ccea3b0686bbe10 upstream.
The framebuffer needs to be unpinned in the crtc->disable callback
because of previous pinning in psb_intel_pipe_set_base(). This will fix
a memory leak where the framebuffer was released but not unpinned
properly. This patch only affects Cedarview.
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=889511
Bugzilla: https://bugzilla.novell.com/show_bug.cgi?id=812113
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Patrik Jakobsson [Wed, 5 Jun 2013 12:24:01 +0000 (14:24 +0200)]
drm/gma500/psb: Unpin framebuffer on crtc disable
commit
820de86a90089ee607d7864538c98a23b503c846 upstream.
The framebuffer needs to be unpinned in the crtc->disable callback
because of previous pinning in psb_intel_pipe_set_base(). This will fix
a memory leak where the framebuffer was released but not unpinned
properly. This patch only affects Poulsbo.
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=889511
Bugzilla: https://bugzilla.novell.com/show_bug.cgi?id=812113
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Tony Lindgren [Wed, 12 Jun 2013 21:04:48 +0000 (14:04 -0700)]
drivers/rtc/rtc-twl.c: fix missing device_init_wakeup() when booted with device tree
commit
24b8256a1fb28d357bc6fa09184ba29b4255ba5c upstream.
When booted in legacy mode device_init_wakeup() gets called by
drivers/mfd/twl-core.c when the children are initialized. However, when
booted using device tree, the children are created with
of_platform_populate() instead add_children().
This means that the RTC driver will not have device_init_wakeup() set,
and we need to call it from the driver probe like RTC drivers typically
do.
Without this we cannot test PM wake-up events on omaps for cases where
there may not be any physical wake-up event.
Signed-off-by: Tony Lindgren <tony@atomide.com>
Reported-by: Kevin Hilman <khilman@linaro.org>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Jingoo Han <jg1.han@samsung.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@linuxfoundation.org>
Alex Elder [Thu, 16 May 2013 20:04:20 +0000 (15:04 -0500)]
rbd: don't destroy ceph_opts in rbd_add()
commit
7262cfca430a1a0e0707149af29ae86bc0ded230 upstream.
Whether rbd_client_create() successfully creates a new client or
not, it takes responsibility for getting the ceph_opts structure
it's passed destroyed. If successful, the structure becomes
associated with the created client; if not, rbd_client_create()
will destroy it.
Previously, rbd_get_client() would call ceph_destroy_options()
if rbd_get_client() failed, and that meant it got called twice.
That led freeing various pointers more than once, which is never a
good idea.
This resolves:
http://tracker.ceph.com/issues/4559
Reported-by: Dan van der Ster <dan@vanderster.com>
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jim Schutt [Wed, 15 May 2013 18:03:35 +0000 (13:03 -0500)]
ceph: ceph_pagelist_append might sleep while atomic
commit
39be95e9c8c0b5668c9f8806ffe29bf9f4bc0f40 upstream.
Ceph's encode_caps_cb() worked hard to not call __page_cache_alloc()
while holding a lock, but it's spoiled because ceph_pagelist_addpage()
always calls kmap(), which might sleep. Here's the result:
[13439.295457] ceph: mds0 reconnect start
[13439.300572] BUG: sleeping function called from invalid context at include/linux/highmem.h:58
[13439.309243] in_atomic(): 1, irqs_disabled(): 0, pid: 12059, name: kworker/1:1
. . .
[13439.376225] Call Trace:
[13439.378757] [<
ffffffff81076f4c>] __might_sleep+0xfc/0x110
[13439.384353] [<
ffffffffa03f4ce0>] ceph_pagelist_append+0x120/0x1b0 [libceph]
[13439.391491] [<
ffffffffa0448fe9>] ceph_encode_locks+0x89/0x190 [ceph]
[13439.398035] [<
ffffffff814ee849>] ? _raw_spin_lock+0x49/0x50
[13439.403775] [<
ffffffff811cadf5>] ? lock_flocks+0x15/0x20
[13439.409277] [<
ffffffffa045e2af>] encode_caps_cb+0x41f/0x4a0 [ceph]
[13439.415622] [<
ffffffff81196748>] ? igrab+0x28/0x70
[13439.420610] [<
ffffffffa045e9f8>] ? iterate_session_caps+0xe8/0x250 [ceph]
[13439.427584] [<
ffffffffa045ea25>] iterate_session_caps+0x115/0x250 [ceph]
[13439.434499] [<
ffffffffa045de90>] ? set_request_path_attr+0x2d0/0x2d0 [ceph]
[13439.441646] [<
ffffffffa0462888>] send_mds_reconnect+0x238/0x450 [ceph]
[13439.448363] [<
ffffffffa0464542>] ? ceph_mdsmap_decode+0x5e2/0x770 [ceph]
[13439.455250] [<
ffffffffa0462e42>] check_new_map+0x352/0x500 [ceph]
[13439.461534] [<
ffffffffa04631ad>] ceph_mdsc_handle_map+0x1bd/0x260 [ceph]
[13439.468432] [<
ffffffff814ebc7e>] ? mutex_unlock+0xe/0x10
[13439.473934] [<
ffffffffa043c612>] extra_mon_dispatch+0x22/0x30 [ceph]
[13439.480464] [<
ffffffffa03f6c2c>] dispatch+0xbc/0x110 [libceph]
[13439.486492] [<
ffffffffa03eec3d>] process_message+0x1ad/0x1d0 [libceph]
[13439.493190] [<
ffffffffa03f1498>] ? read_partial_message+0x3e8/0x520 [libceph]
. . .
[13439.587132] ceph: mds0 reconnect success
[13490.720032] ceph: mds0 caps stale
[13501.235257] ceph: mds0 recovery completed
[13501.300419] ceph: mds0 caps renewed
Fix it up by encoding locks into a buffer first, and when the number
of encoded locks is stable, copy that into a ceph_pagelist.
[elder@inktank.com: abbreviated the stack info a bit.]
Signed-off-by: Jim Schutt <jaschut@sandia.gov>
Reviewed-by: Alex Elder <elder@inktank.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jim Schutt [Wed, 15 May 2013 18:03:35 +0000 (13:03 -0500)]
ceph: add cpu_to_le32() calls when encoding a reconnect capability
commit
c420276a532a10ef59849adc2681f45306166b89 upstream.
In his review, Alex Elder mentioned that he hadn't checked that
num_fcntl_locks and num_flock_locks were properly decoded on the
server side, from a le32 over-the-wire type to a cpu type.
I checked, and AFAICS it is done; those interested can consult
Locker::_do_cap_update()
in src/mds/Locker.cc and src/include/encoding.h in the Ceph server
code (git://github.com/ceph/ceph).
I also checked the server side for flock_len decoding, and I believe
that also happens correctly, by virtue of having been declared
__le32 in struct ceph_mds_cap_reconnect, in src/include/ceph_fs.h.
Signed-off-by: Jim Schutt <jaschut@sandia.gov>
Reviewed-by: Alex Elder <elder@inktank.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Alex Elder [Wed, 15 May 2013 21:28:33 +0000 (16:28 -0500)]
libceph: must hold mutex for reset_changed_osds()
commit
14d2f38df67fadee34625fcbd282ee22514c4846 upstream.
An osd client has a red-black tree describing its osds, and
occasionally we would get crashes due to one of these trees tree
becoming corrupt somehow.
The problem turned out to be that reset_changed_osds() was being
called without protection of the osd client request mutex. That
function would call __reset_osd() for any osd that had changed, and
__reset_osd() would call __remove_osd() for any osd with no
outstanding requests, and finally __remove_osd() would remove the
corresponding entry from the red-black tree. Thus, the tree was
getting modified without having any lock protection, and was
vulnerable to problems due to concurrent updates.
This appears to be the only osd tree updating path that has this
problem. It can be fairly easily fixed by moving the call up
a few lines, to just before the request mutex gets dropped
in kick_requests().
This resolves:
http://tracker.ceph.com/issues/5043
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Rafael J. Wysocki [Mon, 10 Jun 2013 11:00:29 +0000 (13:00 +0200)]
ACPI / video: Do not bind to device objects with a scan handler
commit
8c9b7a7b2fc2750af418ddc28e707c42e78aa0bf upstream.
With the introduction of ACPI scan handlers, ACPI device objects
with an ACPI scan handler attached to them must not be bound to
by ACPI drivers any more. Unfortunately, however, the ACPI video
driver attempts to do just that if there is a _ROM ACPI control
method defined under a device object with an ACPI scan handler.
Prevent that from happening by making the video driver's "add"
routine check if the device object already has an ACPI scan handler
attached to it and return an error code in that case.
That is not sufficient, though, because acpi_bus_driver_init() would
then clear the device object's driver_data that may be set by its
scan handler, so for the fix to work acpi_bus_driver_init() has to be
modified to leave driver_data as is on errors.
References: https://bugzilla.kernel.org/show_bug.cgi?id=58091
Bisected-and-tested-by: Dmitry S. Demin <dmitryy.demin@gmail.com>
Reported-and-tested-by: Jason Cassell <bluesloth600@gmail.com>
Tracked-down-by: Aaron Lu <aaron.lu@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Aaron Lu <aaron.lu@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Kees Cook [Fri, 10 May 2013 21:48:21 +0000 (14:48 -0700)]
b43: stop format string leaking into error msgs
commit
e0e29b683d6784ef59bbc914eac85a04b650e63c upstream.
The module parameter "fwpostfix" is userspace controllable, unfiltered,
and is used to define the firmware filename. b43_do_request_fw() populates
ctx->errors[] on error, containing the firmware filename. b43err()
parses its arguments as a format string. For systems with b43 hardware,
this could lead to a uid-0 to ring-0 escalation.
CVE-2013-2852
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Oleg Nesterov [Wed, 12 Jun 2013 21:04:46 +0000 (14:04 -0700)]
audit: wait_for_auditd() should use TASK_UNINTERRUPTIBLE
commit
f000cfdde5de4fc15dead5ccf524359c07eadf2b upstream.
audit_log_start() does wait_for_auditd() in a loop until
audit_backlog_wait_time passes or audit_skb_queue has a room.
If signal_pending() is true this becomes a busy-wait loop, schedule() in
TASK_INTERRUPTIBLE won't block.
Thanks to Guy for fully investigating and explaining the problem.
(akpm: that'll cause the system to lock up on a non-preemptible
uniprocessor kernel)
(Guy: "Our customer was in fact running a uniprocessor machine, and they
reported a system hang.")
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Reported-by: Guy Streeter <streeter@redhat.com>
Cc: Eric Paris <eparis@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
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@linuxfoundation.org>
Greg Kroah-Hartman [Thu, 13 Jun 2013 17:52:08 +0000 (10:52 -0700)]
Linux 3.9.6
Ben Hutchings [Sun, 9 Jun 2013 20:09:24 +0000 (21:09 +0100)]
s390: Add pgste to ptep_modify_prot_start()
Commit
52f36be0f4e2 's390/pgtable: Fix check for pgste/storage key
handling', which was commit
b56433cb782d upstream, added a use of
pgste to ptep_modify_prot_start(), but this variable does not exist.
In mainline, pgste was added by commit
d3383632d4e8 's390/mm: add pte
invalidation notifier for kvm' and initialised to the return value of
pgste_get_lock(ptep). Initialise it similarly here.
Compile-tested only.
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Zoran Markovic [Fri, 17 May 2013 18:24:05 +0000 (11:24 -0700)]
timekeeping: Correct run-time detection of persistent_clock.
commit
0d6bd9953f739dad96d9a0de65383e479ab4e10d upstream.
Since commit
31ade30692dc9680bfc95700d794818fa3f754ac, timekeeping_init()
checks for presence of persistent clock by attempting to read a non-zero
time value. This is an issue on platforms where persistent_clock (instead
is implemented as a free-running counter (instead of an RTC) starting
from zero on each boot and running during suspend. Examples are some ARM
platforms (e.g. PandaBoard).
An attempt to read such a clock during timekeeping_init() may return zero
value and falsely declare persistent clock as missing. Additionally, in
the above case suspend times may be accounted twice (once from
timekeeping_resume() and once from rtc_resume()), resulting in a gradual
drift of system time.
This patch does a run-time correction of the issue by doing the same check
during timekeeping_suspend().
A better long-term solution would have to return error when trying to read
non-existing clock and zero when trying to read an uninitialized clock, but
that would require changing all persistent_clock implementations.
This patch addresses the immediate breakage, for now.
Signed-off-by: Zoran Markovic <zoran.markovic@linaro.org>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Feng Tang <feng.tang@intel.com>
[jstultz: Tweaked commit message and subject]
Signed-off-by: John Stultz <john.stultz@linaro.org>
[zoran.markovic@linaro.org: reworked patch to fit 3.9-stable.]
Signed-off-by: Zoran Markovic <zoran.markovic@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Konrad Rzeszutek Wilk [Mon, 3 Jun 2013 14:33:55 +0000 (10:33 -0400)]
xen/smp: Fixup NOHZ per cpu data when onlining an offline CPU.
commit
466318a87f28cb3ba0d08a3b7ef1a37ae73d5aa7 upstream.
The xen_play_dead is an undead function. When the vCPU is told to
offline it ends up calling xen_play_dead wherin it calls the
VCPUOP_down hypercall which offlines the vCPU. However, when the
vCPU is onlined back, it resumes execution right after
VCPUOP_down hypercall.
That was OK (albeit the API for play_dead assumes that the CPU
stays dead and never returns) but with commit
4b0c0f294
(tick: Cleanup NOHZ per cpu data on cpu down) that is no longer safe
as said commit resets the ts->inidle which at the start of the
cpu_idle loop was set.
The net effect is that we get this warn:
Broke affinity for irq 16
installing Xen timer for CPU 1
cpu 1 spinlock event irq 48
------------[ cut here ]------------
WARNING: at /home/konrad/linux-linus/kernel/time/tick-sched.c:935 tick_nohz_idle_exit+0x195/0x1b0()
Modules linked in: dm_multipath dm_mod xen_evtchn iscsi_boot_sysfs
CPU: 1 PID: 0 Comm: swapper/1 Not tainted
3.10.0-rc3upstream-00068-gdcdbe33 #1
Hardware name: BIOSTAR Group N61PB-M2S/N61PB-M2S, BIOS 6.00 PG 09/03/2009
ffffffff8193b448 ffff880039da5e60 ffffffff816707c8 ffff880039da5ea0
ffffffff8108ce8b ffff880039da4010 ffff88003fa8e500 ffff880039da4010
0000000000000001 ffff880039da4000 ffff880039da4010 ffff880039da5eb0
Call Trace:
[<
ffffffff816707c8>] dump_stack+0x19/0x1b
[<
ffffffff8108ce8b>] warn_slowpath_common+0x6b/0xa0
[<
ffffffff8108ced5>] warn_slowpath_null+0x15/0x20
[<
ffffffff810e4745>] tick_nohz_idle_exit+0x195/0x1b0
[<
ffffffff810da755>] cpu_startup_entry+0x205/0x250
[<
ffffffff81661070>] cpu_bringup_and_idle+0x13/0x15
---[ end trace
915c8c486004dda1 ]---
b/c ts_inidle is set to zero. Thomas suggested that we just add a workaround
to call tick_nohz_idle_enter before returning from xen_play_dead() - and
that is what this patch does and fixes the issue.
We also add the stable part b/c git commit
4b0c0f294 is on the stable
tree.
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Ben Greear [Thu, 6 Jun 2013 21:29:49 +0000 (14:29 -0700)]
Fix lockup related to stop_machine being stuck in __do_softirq.
commit
34376a50fb1fa095b9d0636fa41ed2e73125f214 upstream.
The stop machine logic can lock up if all but one of the migration
threads make it through the disable-irq step and the one remaining
thread gets stuck in __do_softirq. The reason __do_softirq can hang is
that it has a bail-out based on jiffies timeout, but in the lockup case,
jiffies itself is not incremented.
To work around this, re-add the max_restart counter in __do_irq and stop
processing irqs after 10 restarts.
Thanks to Tejun Heo and Rusty Russell and others for helping me track
this down.
This was introduced in 3.9 by commit
c10d73671ad3 ("softirq: reduce
latencies").
It may be worth looking into ath9k to see if it has issues with its irq
handler at a later date.
The hang stack traces look something like this:
------------[ cut here ]------------
WARNING: at kernel/watchdog.c:245 watchdog_overflow_callback+0x9c/0xa7()
Watchdog detected hard LOCKUP on cpu 2
Modules linked in: ath9k ath9k_common ath9k_hw ath mac80211 cfg80211 nfsv4 auth_rpcgss nfs fscache nf_nat_ipv4 nf_nat veth 8021q garp stp mrp llc pktgen lockd sunrpc]
Pid: 23, comm: migration/2 Tainted: G C 3.9.4+ #11
Call Trace:
<NMI> warn_slowpath_common+0x85/0x9f
warn_slowpath_fmt+0x46/0x48
watchdog_overflow_callback+0x9c/0xa7
__perf_event_overflow+0x137/0x1cb
perf_event_overflow+0x14/0x16
intel_pmu_handle_irq+0x2dc/0x359
perf_event_nmi_handler+0x19/0x1b
nmi_handle+0x7f/0xc2
do_nmi+0xbc/0x304
end_repeat_nmi+0x1e/0x2e
<<EOE>>
cpu_stopper_thread+0xae/0x162
smpboot_thread_fn+0x258/0x260
kthread+0xc7/0xcf
ret_from_fork+0x7c/0xb0
---[ end trace
4947dfa9b0a4cec3 ]---
BUG: soft lockup - CPU#1 stuck for 22s! [migration/1:17]
Modules linked in: ath9k ath9k_common ath9k_hw ath mac80211 cfg80211 nfsv4 auth_rpcgss nfs fscache nf_nat_ipv4 nf_nat veth 8021q garp stp mrp llc pktgen lockd sunrpc]
irq event stamp:
835637905
hardirqs last enabled at (
835637904): __do_softirq+0x9f/0x257
hardirqs last disabled at (
835637905): apic_timer_interrupt+0x6d/0x80
softirqs last enabled at (
5654720): __do_softirq+0x1ff/0x257
softirqs last disabled at (
5654725): irq_exit+0x5f/0xbb
CPU 1
Pid: 17, comm: migration/1 Tainted: G WC 3.9.4+ #11 To be filled by O.E.M. To be filled by O.E.M./To be filled by O.E.M.
RIP: tasklet_hi_action+0xf0/0xf0
Process migration/1
Call Trace:
<IRQ>
__do_softirq+0x117/0x257
irq_exit+0x5f/0xbb
smp_apic_timer_interrupt+0x8a/0x98
apic_timer_interrupt+0x72/0x80
<EOI>
printk+0x4d/0x4f
stop_machine_cpu_stop+0x22c/0x274
cpu_stopper_thread+0xae/0x162
smpboot_thread_fn+0x258/0x260
kthread+0xc7/0xcf
ret_from_fork+0x7c/0xb0
Signed-off-by: Ben Greear <greearb@candelatech.com>
Acked-by: Tejun Heo <tj@kernel.org>
Acked-by: Pekka Riikonen <priikone@iki.fi>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Johan Hovold [Sun, 5 May 2013 18:32:31 +0000 (20:32 +0200)]
USB: io_ti: fix chars_in_buffer overhead
commit
b16634adce951a7371be931487034f7365971ed0 upstream.
Use the new generic usb-serial wait_until_sent implementation to wait
for hardware buffers to drain.
This removes the need to check the hardware buffers in chars_in_buffer
and thus removes the overhead introduced by commit
263e1f9f ("USB:
io_ti: query hardware-buffer status in chars_in_buffer") without
breaking tty_wait_until_sent (used by, for example, tcdrain, tcsendbreak
and close).
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>