Jianyu Zhan [Mon, 14 Apr 2014 05:47:40 +0000 (13:47 +0800)]
percpu: make pcpu_alloc_chunk() use pcpu_mem_free() instead of kfree()
commit
5a838c3b60e3a36ade764cf7751b8f17d7c9c2da upstream.
pcpu_chunk_struct_size = sizeof(struct pcpu_chunk) +
BITS_TO_LONGS(pcpu_unit_pages) * sizeof(unsigned long)
It hardly could be ever bigger than PAGE_SIZE even for large-scale machine,
but for consistency with its couterpart pcpu_mem_zalloc(),
use pcpu_mem_free() instead.
Commit
b4916cb17c26 ("percpu: make pcpu_free_chunk() use
pcpu_mem_free() instead of kfree()") addressed this problem, but
missed this one.
tj: commit message updated
Signed-off-by: Jianyu Zhan <nasa4836@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Fixes:
099a19d91ca4 ("percpu: allow limited allocation before slab is online)
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
J. Bruce Fields [Tue, 20 May 2014 19:55:21 +0000 (15:55 -0400)]
nfsd4: remove lockowner when removing lock stateid
commit
a1b8ff4c97b4375d21b6d6c45d75877303f61b3b upstream.
The nfsv4 state code has always assumed a one-to-one correspondance
between lock stateid's and lockowners even if it appears not to in some
places.
We may actually change that, but for now when FREE_STATEID releases a
lock stateid it also needs to release the parent lockowner.
Symptoms were a subsequent LOCK crashing in find_lockowner_str when it
calls same_lockowner_ino on a lockowner that unexpectedly has an empty
so_stateids list.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
J. Bruce Fields [Thu, 8 May 2014 15:19:41 +0000 (11:19 -0400)]
nfsd4: warn on finding lockowner without stateid's
commit
27b11428b7de097c42f205beabb1764f4365443b upstream.
The current code assumes a one-to-one lockowner<->lock stateid
correspondance.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Kinglong Mee [Fri, 18 Apr 2014 12:49:04 +0000 (20:49 +0800)]
NFSD: Call ->set_acl with a NULL ACL structure if no entries
commit
aa07c713ecfc0522916f3cd57ac628ea6127c0ec upstream.
After setting ACL for directory, I got two problems that caused
by the cached zero-length default posix acl.
This patch make sure nfsd4_set_nfs4_acl calls ->set_acl
with a NULL ACL structure if there are no entries.
Thanks for Christoph Hellwig's advice.
First problem:
............ hang ...........
Second problem:
[ 1610.167668] ------------[ cut here ]------------
[ 1610.168320] kernel BUG at /root/nfs/linux/fs/nfsd/nfs4acl.c:239!
[ 1610.168320] invalid opcode: 0000 [#1] SMP DEBUG_PAGEALLOC
[ 1610.168320] Modules linked in: nfsv4(OE) nfs(OE) nfsd(OE)
rpcsec_gss_krb5 fscache ip6t_rpfilter ip6t_REJECT cfg80211 xt_conntrack
rfkill ebtable_nat ebtable_broute bridge stp llc ebtable_filter ebtables
ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6
ip6table_mangle ip6table_security ip6table_raw ip6table_filter
ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4
nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw
auth_rpcgss nfs_acl snd_intel8x0 ppdev lockd snd_ac97_codec ac97_bus
snd_pcm snd_timer e1000 pcspkr parport_pc snd parport serio_raw joydev
i2c_piix4 sunrpc(OE) microcode soundcore i2c_core ata_generic pata_acpi
[last unloaded: nfsd]
[ 1610.168320] CPU: 0 PID: 27397 Comm: nfsd Tainted: G OE
3.15.0-rc1+ #15
[ 1610.168320] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS
VirtualBox 12/01/2006
[ 1610.168320] task:
ffff88005ab653d0 ti:
ffff88005a944000 task.ti:
ffff88005a944000
[ 1610.168320] RIP: 0010:[<
ffffffffa034d5ed>] [<
ffffffffa034d5ed>]
_posix_to_nfsv4_one+0x3cd/0x3d0 [nfsd]
[ 1610.168320] RSP: 0018:
ffff88005a945b00 EFLAGS:
00010293
[ 1610.168320] RAX:
0000000000000001 RBX:
ffff88006700bac0 RCX:
0000000000000000
[ 1610.168320] RDX:
0000000000000000 RSI:
ffff880067c83f00 RDI:
ffff880068233300
[ 1610.168320] RBP:
ffff88005a945b48 R08:
ffffffff81c64830 R09:
0000000000000000
[ 1610.168320] R10:
ffff88004ea85be0 R11:
000000000000f475 R12:
ffff880068233300
[ 1610.168320] R13:
0000000000000003 R14:
0000000000000002 R15:
ffff880068233300
[ 1610.168320] FS:
0000000000000000(0000) GS:
ffff880077800000(0000)
knlGS:
0000000000000000
[ 1610.168320] CS: 0010 DS: 0000 ES: 0000 CR0:
000000008005003b
[ 1610.168320] CR2:
00007f5bcbd3b0b9 CR3:
0000000001c0f000 CR4:
00000000000006f0
[ 1610.168320] DR0:
0000000000000000 DR1:
0000000000000000 DR2:
0000000000000000
[ 1610.168320] DR3:
0000000000000000 DR6:
00000000fffe0ff0 DR7:
0000000000000400
[ 1610.168320] Stack:
[ 1610.168320]
ffffffff00000000 0000000b67c83500 000000076700bac0
0000000000000000
[ 1610.168320]
ffff88006700bac0 ffff880068233300 ffff88005a945c08
0000000000000002
[ 1610.168320]
0000000000000000 ffff88005a945b88 ffffffffa034e2d5
000000065a945b68
[ 1610.168320] Call Trace:
[ 1610.168320] [<
ffffffffa034e2d5>] nfsd4_get_nfs4_acl+0x95/0x150 [nfsd]
[ 1610.168320] [<
ffffffffa03400d6>] nfsd4_encode_fattr+0x646/0x1e70 [nfsd]
[ 1610.168320] [<
ffffffff816a6e6e>] ? kmemleak_alloc+0x4e/0xb0
[ 1610.168320] [<
ffffffffa0327962>] ?
nfsd_setuser_and_check_port+0x52/0x80 [nfsd]
[ 1610.168320] [<
ffffffff812cd4bb>] ? selinux_cred_prepare+0x1b/0x30
[ 1610.168320] [<
ffffffffa0341caa>] nfsd4_encode_getattr+0x5a/0x60 [nfsd]
[ 1610.168320] [<
ffffffffa0341e07>] nfsd4_encode_operation+0x67/0x110
[nfsd]
[ 1610.168320] [<
ffffffffa033844d>] nfsd4_proc_compound+0x21d/0x810 [nfsd]
[ 1610.168320] [<
ffffffffa0324d9b>] nfsd_dispatch+0xbb/0x200 [nfsd]
[ 1610.168320] [<
ffffffffa00850cd>] svc_process_common+0x46d/0x6d0 [sunrpc]
[ 1610.168320] [<
ffffffffa0085433>] svc_process+0x103/0x170 [sunrpc]
[ 1610.168320] [<
ffffffffa032472f>] nfsd+0xbf/0x130 [nfsd]
[ 1610.168320] [<
ffffffffa0324670>] ? nfsd_destroy+0x80/0x80 [nfsd]
[ 1610.168320] [<
ffffffff810a5202>] kthread+0xd2/0xf0
[ 1610.168320] [<
ffffffff810a5130>] ? insert_kthread_work+0x40/0x40
[ 1610.168320] [<
ffffffff816c1ebc>] ret_from_fork+0x7c/0xb0
[ 1610.168320] [<
ffffffff810a5130>] ? insert_kthread_work+0x40/0x40
[ 1610.168320] Code: 78 02 e9 e7 fc ff ff 31 c0 31 d2 31 c9 66 89 45 ce
41 8b 04 24 66 89 55 d0 66 89 4d d2 48 8d 04 80 49 8d 5c 84 04 e9 37 fd
ff ff <0f> 0b 90 0f 1f 44 00 00 55 8b 56 08 c7 07 00 00 00 00 8b 46 0c
[ 1610.168320] RIP [<
ffffffffa034d5ed>] _posix_to_nfsv4_one+0x3cd/0x3d0
[nfsd]
[ 1610.168320] RSP <
ffff88005a945b00>
[ 1610.257313] ---[ end trace
838254e3e352285b ]---
Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Romain Izard [Tue, 4 Mar 2014 09:09:39 +0000 (10:09 +0100)]
trace: module: Maintain a valid user count
commit
098507ae3ec2331476fb52e85d4040c1cc6d0ef4 upstream.
The replacement of the 'count' variable by two variables 'incs' and
'decs' to resolve some race conditions during module unloading was done
in parallel with some cleanup in the trace subsystem, and was integrated
as a merge.
Unfortunately, the formula for this replacement was wrong in the tracing
code, and the refcount in the traces was not usable as a result.
Use 'count = incs - decs' to compute the user count.
Link: http://lkml.kernel.org/p/1393924179-9147-1-git-send-email-romain.izard.pro@gmail.com
Acked-by: Ingo Molnar <mingo@kernel.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Fixes:
c1ab9cab7509 "merge conflict resolution"
Signed-off-by: Romain Izard <romain.izard.pro@gmail.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Salva Peiró [Wed, 30 Apr 2014 17:48:02 +0000 (19:48 +0200)]
media: media-device: fix infoleak in ioctl media_enum_entities()
commit
e6a623460e5fc960ac3ee9f946d3106233fd28d8 upstream.
This fixes CVE-2014-1739.
Signed-off-by: Salva Peiró <speiro@ai2.upv.es>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Tim Chen [Mon, 17 Mar 2014 23:52:26 +0000 (16:52 -0700)]
crypto: crypto_wq - Fix late crypto work queue initialization
commit
130fa5bc81b44b6cc1fbdea3abf6db0da22964e0 upstream.
The crypto algorithm modules utilizing the crypto daemon could
be used early when the system start up. Using module_init
does not guarantee that the daemon's work queue is initialized
when the cypto alorithm depending on crypto_wq starts. It is necessary
to initialize the crypto work queue earlier at the subsystem
init time to make sure that it is initialized
when used.
Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Geert Uytterhoeven [Mon, 14 Apr 2014 16:52:14 +0000 (18:52 +0200)]
Documentation: Update stable address in Chinese and Japanese translations
commit
98b0f811aade1b7c6e7806c86aa0befd5919d65f upstream.
The English and Korean translations were updated, the Chinese and Japanese
weren't.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ilia Mirkin [Wed, 26 Mar 2014 23:37:21 +0000 (19:37 -0400)]
drm/nouveau/acpi: allow non-optimus setups to load vbios from acpi
commit
a3d0b1218d351c6e6f3cea36abe22236a08cb246 upstream.
There appear to be a crop of new hardware where the vbios is not
available from PROM/PRAMIN, but there is a valid _ROM method in ACPI.
The data read from PCIROM almost invariably contains invalid
instructions (still has the x86 opcodes), which makes this a low-risk
way to try to obtain a valid vbios image.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=76475
Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ben Hutchings [Sat, 26 Apr 2014 20:59:04 +0000 (21:59 +0100)]
rtl8192cu: Fix unbalanced irq enable in error path of rtl92cu_hw_init()
commit
3234f5b06fc3094176a86772cc64baf3decc98fc upstream.
Fixes:
a53268be0cb9 ('rtlwifi: rtl8192cu: Fix too long disable of IRQs')
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Liu Hua [Thu, 27 Mar 2014 05:56:18 +0000 (06:56 +0100)]
ARM: 8012/1: kdump: Avoid overflow when converting pfn to physaddr
commit
8fad87bca7ac9737e413ba5f1656f1114a8c314d upstream.
When we configure CONFIG_ARM_LPAE=y, pfn << PAGE_SHIFT will
overflow if pfn >= 0x100000 in copy_oldmem_page.
So use __pfn_to_phys for converting.
Signed-off-by: Liu Hua <sdu.liu@huawei.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Christoph Hellwig [Sun, 4 May 2014 11:03:32 +0000 (13:03 +0200)]
posix_acl: handle NULL ACL in posix_acl_equiv_mode
commit
50c6e282bdf5e8dabf8d7cf7b162545a55645fd9 upstream.
Various filesystems don't bother checking for a NULL ACL in
posix_acl_equiv_mode, and thus can dereference a NULL pointer when it
gets passed one. This usually happens from the NFS server, as the ACL tools
never pass a NULL ACL, but instead of one representing the mode bits.
Instead of adding boilerplat to all filesystems put this check into one place,
which will allow us to remove the check from other filesystems as well later
on.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reported-by: Ben Greear <greearb@candelatech.com>
Reported-by: Marco Munderloh <munderl@tnt.uni-hannover.de>,
Cc: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Stanislaw Gruszka [Thu, 17 Apr 2014 09:08:47 +0000 (11:08 +0200)]
rt2x00: fix beaconing on USB
commit
8834d3608cc516f13e2e510f4057c263f3d2ce42 upstream.
When disable beaconing we clear register with beacon and newer set it
back, what make we stop send beacons infinitely.
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Daniele Forsi [Mon, 28 Apr 2014 15:09:11 +0000 (17:09 +0200)]
USB: Nokia 5300 should be treated as unusual dev
commit
6ed07d45d09bc2aa60e27b845543db9972e22a38 upstream.
Signed-off-by: Daniele Forsi <dforsi@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Victor A. Santos [Sun, 27 Apr 2014 02:20:14 +0000 (23:20 -0300)]
USB: Nokia 305 should be treated as unusual dev
commit
f0ef5d41792a46a1085dead9dfb0bdb2c574638e upstream.
Signed-off-by: Victor A. Santos <victoraur.santos@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Daniele Forsi [Tue, 29 Apr 2014 09:44:03 +0000 (11:44 +0200)]
usb: storage: shuttle_usbat: fix discs being detected twice
commit
df602c2d2358f02c6e49cffc5b49b9daa16db033 upstream.
Even if the USB-to-ATAPI converter supported multiple LUNs, this
driver would always detect the same physical device or media because
it doesn't use srb->device->lun in any way.
Tested with an Hewlett-Packard CD-Writer Plus 8200e.
Signed-off-by: Daniele Forsi <dforsi@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jean-Jacques Hiblot [Wed, 12 Mar 2014 16:30:08 +0000 (17:30 +0100)]
usb: gadget: at91-udc: fix irq and iomem resource retrieval
commit
886c7c426d465732ec9d1b2bbdda5642fc2e7e05 upstream.
When using dt resources retrieval (interrupts and reg properties) there is
no predefined order for these resources in the platform dev resource
table. Also don't expect the number of resource to be always 2.
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@traphandler.com>
Acked-by: Boris BREZILLON <b.brezillon@overkiz.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Alex Deucher [Tue, 15 Apr 2014 16:44:34 +0000 (12:44 -0400)]
drm/radeon: fix ATPX detection on non-VGA GPUs
commit
e9a4099a59cc598a44006059dd775c25e422b772 upstream.
Some newer PX laptops have the pci device class
set to DISPLAY_OTHER rather than DISPLAY_VGA. This
properly detects ATPX on those laptops.
Based on a patch from: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: airlied@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
NeilBrown [Mon, 5 May 2014 23:36:08 +0000 (09:36 +1000)]
md: avoid possible spinning md thread at shutdown.
commit
0f62fb220aa4ebabe8547d3a9ce4a16d3c045f21 upstream.
If an md array with externally managed metadata (e.g. DDF or IMSM)
is in use, then we should not set safemode==2 at shutdown because:
1/ this is ineffective: user-space need to be involved in any 'safemode' handling,
2/ The safemode management code doesn't cope with safemode==2 on external metadata
and md_check_recover enters an infinite loop.
Even at shutdown, an infinite-looping process can be problematic, so this
could cause shutdown to hang.
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Viresh Kumar [Mon, 12 May 2014 08:12:29 +0000 (13:42 +0530)]
hrtimer: Set expiry time before switch_hrtimer_base()
commit
84ea7fe37908254c3bd90910921f6e1045c1747a upstream.
switch_hrtimer_base() calls hrtimer_check_target() which ensures that
we do not migrate a timer to a remote cpu if the timer expires before
the current programmed expiry time on that remote cpu.
But __hrtimer_start_range_ns() calls switch_hrtimer_base() before the
new expiry time is set. So the sanity check in hrtimer_check_target()
is operating on stale or even uninitialized data.
Update expiry time before calling switch_hrtimer_base().
[ tglx: Rewrote changelog once again ]
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Cc: linaro-kernel@lists.linaro.org
Cc: linaro-networking@linaro.org
Cc: fweisbec@gmail.com
Cc: arvind.chauhan@arm.com
Link: http://lkml.kernel.org/r/81999e148745fc51bbcd0615823fbab9b2e87e23.1399882253.git.viresh.kumar@linaro.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Leon Ma [Wed, 30 Apr 2014 08:43:10 +0000 (16:43 +0800)]
hrtimer: Prevent remote enqueue of leftmost timers
commit
012a45e3f4af68e86d85cce060c6c2fed56498b2 upstream.
If a cpu is idle and starts an hrtimer which is not pinned on that
same cpu, the nohz code might target the timer to a different cpu.
In the case that we switch the cpu base of the timer we already have a
sanity check in place, which determines whether the timer is earlier
than the current leftmost timer on the target cpu. In that case we
enqueue the timer on the current cpu because we cannot reprogram the
clock event device on the target.
If the timers base is already the target CPU we do not have this
sanity check in place so we enqueue the timer as the leftmost timer in
the target cpus rb tree, but we cannot reprogram the clock event
device on the target cpu. So the timer expires late and subsequently
prevents the reprogramming of the target cpu clock event device until
the previously programmed event fires or a timer with an earlier
expiry time gets enqueued on the target cpu itself.
Add the same target check as we have for the switch base case and
start the timer on the current cpu if it would become the leftmost
timer on the target.
[ tglx: Rewrote subject and changelog ]
Signed-off-by: Leon Ma <xindong.ma@intel.com>
Link: http://lkml.kernel.org/r/1398847391-5994-1-git-send-email-xindong.ma@intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Stuart Hayes [Tue, 29 Apr 2014 22:55:02 +0000 (17:55 -0500)]
hrtimer: Prevent all reprogramming if hang detected
commit
6c6c0d5a1c949d2e084706f9e5fb1fccc175b265 upstream.
If the last hrtimer interrupt detected a hang it sets hang_detected=1
and programs the clock event device with a delay to let the system
make progress.
If hang_detected == 1, we prevent reprogramming of the clock event
device in hrtimer_reprogram() but not in hrtimer_force_reprogram().
This can lead to the following situation:
hrtimer_interrupt()
hang_detected = 1;
program ce device to Xms from now (hang delay)
We have two timers pending:
T1 expires 50ms from now
T2 expires 5s from now
Now T1 gets canceled, which causes hrtimer_force_reprogram() to be
invoked, which in turn programs the clock event device to T2 (5
seconds from now).
Any hrtimer_start after that will not reprogram the hardware due to
hang_detected still being set. So we effectivly block all timers until
the T2 event fires and cleans up the hang situation.
Add a check for hang_detected to hrtimer_force_reprogram() which
prevents the reprogramming of the hang delay in the hardware
timer. The subsequent hrtimer_interrupt will resolve all outstanding
issues.
[ tglx: Rewrote subject and changelog and fixed up the comment in
hrtimer_force_reprogram() ]
Signed-off-by: Stuart Hayes <stuart.w.hayes@gmail.com>
Link: http://lkml.kernel.org/r/53602DC6.2060101@gmail.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Grant Likely [Tue, 29 Apr 2014 11:05:22 +0000 (12:05 +0100)]
drivercore: deferral race condition fix
commit
58b116bce13612e5aa6fcd49ecbd4cf8bb59e835 upstream.
When the kernel is built with CONFIG_PREEMPT it is possible to reach a state
when all modules loaded but some driver still stuck in the deferred list
and there is a need for external event to kick the deferred queue to probe
these drivers.
The issue has been observed on embedded systems with CONFIG_PREEMPT enabled,
audio support built as modules and using nfsroot for root filesystem.
The following log fragment shows such sequence when all audio modules
were loaded but the sound card is not present since the machine driver has
failed to probe due to missing dependency during it's probe.
The board is am335x-evmsk (McASP<->tlv320aic3106 codec) with davinci-evm
machine driver:
...
[ 12.615118] davinci-mcasp
4803c000.mcasp: davinci_mcasp_probe: ENTER
[ 12.719969] davinci_evm sound.3: davinci_evm_probe: ENTER
[ 12.725753] davinci_evm sound.3: davinci_evm_probe: snd_soc_register_card
[ 12.753846] davinci-mcasp
4803c000.mcasp: davinci_mcasp_probe: snd_soc_register_component
[ 12.922051] davinci-mcasp
4803c000.mcasp: davinci_mcasp_probe: snd_soc_register_component DONE
[ 12.950839] davinci_evm sound.3: ASoC: platform (null) not registered
[ 12.957898] davinci_evm sound.3: davinci_evm_probe: snd_soc_register_card DONE (-517)
[ 13.099026] davinci-mcasp
4803c000.mcasp: Kicking the deferred list
[ 13.177838] davinci-mcasp
4803c000.mcasp: really_probe: probe_count = 2
[ 13.194130] davinci_evm sound.3: snd_soc_register_card failed (-517)
[ 13.346755] davinci_mcasp_driver_init: LEAVE
[ 13.377446] platform sound.3: Driver davinci_evm requests probe deferral
[ 13.592527] platform sound.3: really_probe: probe_count = 0
In the log the machine driver enters it's probe at 12.719969 (this point it
has been removed from the deferred lists). McASP driver already executing
it's probing (since 12.615118).
The machine driver tries to construct the sound card (12.950839) but did
not found one of the components so it fails. After this McASP driver
registers all the ASoC components (the machine driver still in it's probe
function after it failed to construct the card) and the deferred work is
prepared at 13.099026 (note that this time the machine driver is not in the
lists so it is not going to be handled when the work is executing).
Lastly the machine driver exit from it's probe and the core places it to
the deferred list but there will be no other driver going to load and the
deferred queue is not going to be kicked again - till we have external event
like connecting USB stick, etc.
The proposed solution is to try the deferred queue once more when the last
driver is asking for deferring and we had drivers loaded while this last
driver was probing.
This way we can avoid drivers stuck in the deferred queue.
Signed-off-by: Grant Likely <grant.likely@linaro.org>
Reviewed-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Josef Gajdusek [Mon, 12 May 2014 11:48:26 +0000 (13:48 +0200)]
hwmon: (emc1403) Support full range of known chip revision numbers
commit
3a18e1398fc2dc9c32bbdc50664da3a77959a8d1 upstream.
The datasheet for EMC1413/EMC1414, which is fully compatible to
EMC1403/1404 and uses the same chip identification, references revision
numbers 0x01, 0x03, and 0x04. Accept the full range of revision numbers
from 0x01 to 0x04 to make sure none are missed.
Signed-off-by: Josef Gajdusek <atx@atx.name>
[Guenter Roeck: Updated headline and description]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Josef Gajdusek [Sun, 11 May 2014 12:40:44 +0000 (14:40 +0200)]
hwmon: (emc1403) fix inverted store_hyst()
commit
17c048fc4bd95efea208a1920f169547d8588f1f upstream.
Attempts to set the hysteresis value to a temperature below the target
limit fails with "write error: Numerical result out of range" due to
an inverted comparison.
Signed-off-by: Josef Gajdusek <atx@atx.name>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
[Guenter Roeck: Updated headline and description]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Chen Yucong [Thu, 22 May 2014 18:54:15 +0000 (11:54 -0700)]
hwpoison, hugetlb: lock_page/unlock_page does not match for handling a free hugepage
commit
b985194c8c0a130ed155b71662e39f7eaea4876f upstream.
For handling a free hugepage in memory failure, the race will happen if
another thread hwpoisoned this hugepage concurrently. So we need to
check PageHWPoison instead of !PageHWPoison.
If hwpoison_filter(p) returns true or a race happens, then we need to
unlock_page(hpage).
Signed-off-by: Chen Yucong <slaoub@gmail.com>
Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Tested-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Reviewed-by: Andi Kleen <ak@linux.intel.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>
Anthony Iliopoulos [Wed, 14 May 2014 09:29:48 +0000 (11:29 +0200)]
x86, mm, hugetlb: Add missing TLB page invalidation for hugetlb_cow()
commit
9844f5462392b53824e8b86726e7c33b5ecbb676 upstream.
The invalidation is required in order to maintain proper semantics
under CoW conditions. In scenarios where a process clones several
threads, a thread operating on a core whose DTLB entry for a
particular hugepage has not been invalidated, will be reading from
the hugepage that belongs to the forked child process, even after
hugetlb_cow().
The thread will not see the updated page as long as the stale DTLB
entry remains cached, the thread attempts to write into the page,
the child process exits, or the thread gets migrated to a different
processor.
Signed-off-by: Anthony Iliopoulos <anthony.iliopoulos@huawei.com>
Link: http://lkml.kernel.org/r/20140514092948.GA17391@server-36.huawei.corp
Suggested-by: Shay Goikhman <shay.goikhman@huawei.com>
Acked-by: Dave Hansen <dave.hansen@intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Corey Minyard [Mon, 14 Apr 2014 14:46:52 +0000 (09:46 -0500)]
ipmi: Reset the KCS timeout when starting error recovery
commit
eb6d78ec213e6938559b801421d64714dafcf4b2 upstream.
The OBF timer in KCS was not reset in one situation when error recovery
was started, resulting in an immediate timeout.
Reported-by: Bodo Stroesser <bstroesser@ts.fujitsu.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Bodo Stroesser [Mon, 14 Apr 2014 14:46:51 +0000 (09:46 -0500)]
ipmi: Fix a race restarting the timer
commit
48e8ac2979920ffa39117e2d725afa3a749bfe8d upstream.
With recent changes it is possible for the timer handler to detect an
idle interface and not start the timer, but the thread to start an
operation at the same time. The thread will not start the timer in that
instance, resulting in the timer not running.
Instead, move all timer operations under the lock and start the timer in
the thread if it detect non-idle and the timer is not already running.
Moving under locks allows the last timeout to be set in both the thread
and the timer. 'Timer is not running' means that the timer is not
pending and smi_timeout() is not running. So we need a flag to detect
this correctly.
Also fix a few other timeout bugs: setting the last timeout when the
interrupt has to be disabled and the timer started, and setting the last
timeout in check_start_timer_thread possibly racing with the timer
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Bodo Stroesser <bstroesser@ts.fujitsu.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jiri Bohac [Fri, 18 Apr 2014 15:23:11 +0000 (17:23 +0200)]
timer: Prevent overflow in apply_slack
commit
98a01e779f3c66b0b11cd7e64d531c0e41c95762 upstream.
On architectures with sizeof(int) < sizeof (long), the
computation of mask inside apply_slack() can be undefined if the
computed bit is > 32.
E.g. with: expires = 0xffffe6f5 and slack = 25, we get:
expires_limit = 0x20000000e
bit = 33
mask = (1 << 33) - 1 /* undefined */
On x86, mask becomes 1 and and the slack is not applied properly.
On s390, mask is -1, expires is set to 0 and the timer fires immediately.
Use 1UL << bit to solve that issue.
Suggested-by: Deborah Townsend <dstownse@us.ibm.com>
Signed-off-by: Jiri Bohac <jbohac@suse.cz>
Link: http://lkml.kernel.org/r/20140418152310.GA13654@midget.suse.cz
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Linus Torvalds [Tue, 22 Apr 2014 20:49:40 +0000 (13:49 -0700)]
mm: make fixup_user_fault() check the vma access rights too
commit
1b17844b29ae042576bea588164f2f1e9590a8bc upstream.
fixup_user_fault() is used by the futex code when the direct user access
fails, and the futex code wants it to either map in the page in a usable
form or return an error. It relied on handle_mm_fault() to map the
page, and correctly checked the error return from that, but while that
does map the page, it doesn't actually guarantee that the page will be
mapped with sufficient permissions to be then accessed.
So do the appropriate tests of the vma access rights by hand.
[ Side note: arguably handle_mm_fault() could just do that itself, but
we have traditionally done it in the caller, because some callers -
notably get_user_pages() - have been able to access pages even when
they are mapped with PROT_NONE. Maybe we should re-visit that design
decision, but in the meantime this is the minimal patch. ]
Found by Dave Jones running his trinity tool.
Reported-by: Dave Jones <davej@redhat.com>
Acked-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Bartlomiej Zolnierkiewicz [Mon, 31 Mar 2014 17:51:14 +0000 (19:51 +0200)]
pata_at91: fix ata_host_activate() failure handling
commit
27aa64b9d1bd0d23fd692c91763a48309b694311 upstream.
Add missing clk_put() call to ata_host_activate() failure path.
Sergei says,
"Hm, I have once fixed that (see that *if* (!ret)) but looks like a
later commit
477c87e90853d136b188c50c0e4a93d01cad872e (ARM:
at91/pata: use gpio_is_valid to check the gpio) broke it again. :-(
Would be good if the changelog did mention that..."
Cc: Andrew Victor <linux@maxim.org.za>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>
Cc: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Steven Rostedt (Red Hat) [Thu, 24 Apr 2014 14:40:12 +0000 (10:40 -0400)]
ftrace/module: Hardcode ftrace_module_init() call into load_module()
commit
a949ae560a511fe4e3adf48fa44fefded93e5c2b upstream.
A race exists between module loading and enabling of function tracer.
CPU 1 CPU 2
----- -----
load_module()
module->state = MODULE_STATE_COMING
register_ftrace_function()
mutex_lock(&ftrace_lock);
ftrace_startup()
update_ftrace_function();
ftrace_arch_code_modify_prepare()
set_all_module_text_rw();
<enables-ftrace>
ftrace_arch_code_modify_post_process()
set_all_module_text_ro();
[ here all module text is set to RO,
including the module that is
loading!! ]
blocking_notifier_call_chain(MODULE_STATE_COMING);
ftrace_init_module()
[ tries to modify code, but it's RO, and fails!
ftrace_bug() is called]
When this race happens, ftrace_bug() will produces a nasty warning and
all of the function tracing features will be disabled until reboot.
The simple solution is to treate module load the same way the core
kernel is treated at boot. To hardcode the ftrace function modification
of converting calls to mcount into nops. This is done in init/main.c
there's no reason it could not be done in load_module(). This gives
a better control of the changes and doesn't tie the state of the
module to its notifiers as much. Ftrace is special, it needs to be
treated as such.
The reason this would work, is that the ftrace_module_init() would be
called while the module is in MODULE_STATE_UNFORMED, which is ignored
by the set_all_module_text_ro() call.
Link: http://lkml.kernel.org/r/1395637826-3312-1-git-send-email-indou.takao@jp.fujitsu.com
Reported-by: Takao Indoh <indou.takao@jp.fujitsu.com>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Thomas Gleixner [Mon, 12 May 2014 20:45:35 +0000 (20:45 +0000)]
futex: Prevent attaching to kernel threads
commit
f0d71b3dcb8332f7971b5f2363632573e6d9486a upstream.
We happily allow userspace to declare a random kernel thread to be the
owner of a user space PI futex.
Found while analysing the fallout of Dave Jones syscall fuzzer.
We also should validate the thread group for private futexes and find
some fast way to validate whether the "alleged" owner has RW access on
the file which backs the SHM, but that's a separate issue.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Dave Jones <davej@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Darren Hart <darren@dvhart.com>
Cc: Davidlohr Bueso <davidlohr@hp.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Clark Williams <williams@redhat.com>
Cc: Paul McKenney <paulmck@linux.vnet.ibm.com>
Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: Roland McGrath <roland@hack.frob.com>
Cc: Carlos ODonell <carlos@redhat.com>
Cc: Jakub Jelinek <jakub@redhat.com>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Link: http://lkml.kernel.org/r/20140512201701.194824402@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Thomas Gleixner [Mon, 12 May 2014 20:45:34 +0000 (20:45 +0000)]
futex: Add another early deadlock detection check
commit
866293ee54227584ffcb4a42f69c1f365974ba7f upstream.
Dave Jones trinity syscall fuzzer exposed an issue in the deadlock
detection code of rtmutex:
http://lkml.kernel.org/r/
20140429151655.GA14277@redhat.com
That underlying issue has been fixed with a patch to the rtmutex code,
but the futex code must not call into rtmutex in that case because
- it can detect that issue early
- it avoids a different and more complex fixup for backing out
If the user space variable got manipulated to 0x80000000 which means
no lock holder, but the waiters bit set and an active pi_state in the
kernel is found we can figure out the recursive locking issue by
looking at the pi_state owner. If that is the current task, then we
can safely return -EDEADLK.
The check should have been added in commit
59fa62451 (futex: Handle
futex_pi OWNER_DIED take over correctly) already, but I did not see
the above issue caused by user space manipulation back then.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Dave Jones <davej@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Darren Hart <darren@dvhart.com>
Cc: Davidlohr Bueso <davidlohr@hp.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Clark Williams <williams@redhat.com>
Cc: Paul McKenney <paulmck@linux.vnet.ibm.com>
Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: Roland McGrath <roland@hack.frob.com>
Cc: Carlos ODonell <carlos@redhat.com>
Cc: Jakub Jelinek <jakub@redhat.com>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Link: http://lkml.kernel.org/r/20140512201701.097349971@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Eric Dumazet [Thu, 3 Apr 2014 16:28:10 +0000 (09:28 -0700)]
net-gro: reset skb->truesize in napi_reuse_skb()
[ Upstream commit
e33d0ba8047b049c9262fdb1fcafb93cb52ceceb ]
Recycling skb always had been very tough...
This time it appears GRO layer can accumulate skb->truesize
adjustments made by drivers when they attach a fragment to skb.
skb_gro_receive() can only subtract from skb->truesize the used part
of a fragment.
I spotted this problem seeing TcpExtPruneCalled and
TcpExtTCPRcvCollapsed that were unexpected with a recent kernel, where
TCP receive window should be sized properly to accept traffic coming
from a driver not overshooting skb->truesize.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Alexander Duyck [Fri, 4 May 2012 14:26:56 +0000 (14:26 +0000)]
skb: Add inline helper for getting the skb end offset from head
[ Upstream commit
ec47ea82477404631d49b8e568c71826c9b663ac ]
With the recent changes for how we compute the skb truesize it occurs to me
we are probably going to have a lot of calls to skb_end_pointer -
skb->head. Instead of running all over the place doing that it would make
more sense to just make it a separate inline skb_end_offset(skb) that way
we can return the correct value without having gcc having to do all the
optimization to cancel out skb->head - skb->head.
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Li RongQing [Thu, 22 May 2014 08:36:55 +0000 (16:36 +0800)]
ipv4: initialise the itag variable in __mkroute_input
[ Upstream commit
fbdc0ad095c0a299e9abf5d8ac8f58374951149a ]
the value of itag is a random value from stack, and may not be initiated by
fib_validate_source, which called fib_combine_itag if CONFIG_IP_ROUTE_CLASSID
is not set
This will make the cached dst uncertainty
Signed-off-by: Li RongQing <roy.qing.li@gmail.com>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jason Wang [Wed, 15 Aug 2012 20:44:27 +0000 (20:44 +0000)]
act_mirred: do not drop packets when fails to mirror it
[ Upstream commit
16c0b164bd24d44db137693a36b428ba28970c62 ]
We drop packet unconditionally when we fail to mirror it. This is not intended
in some cases. Consdier for kvm guest, we may mirror the traffic of the bridge
to a tap device used by a VM. When kernel fails to mirror the packet in
conditions such as when qemu crashes or stop polling the tap, it's hard for the
management software to detect such condition and clean the the mirroring
before. This would lead all packets to the bridge to be dropped and break the
netowrk of other virtual machines.
To solve the issue, the patch does not drop packets when kernel fails to mirror
it, and only drop the redirected packets.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Sergey Popovich [Tue, 6 May 2014 15:23:08 +0000 (18:23 +0300)]
ipv4: fib_semantics: increment fib_info_cnt after fib_info allocation
[ Upstream commit
aeefa1ecfc799b0ea2c4979617f14cecd5cccbfd ]
Increment fib_info_cnt in fib_create_info() right after successfuly
alllocating fib_info structure, overwise fib_metrics allocation failure
leads to fib_info_cnt incorrectly decremented in free_fib_info(), called
on error path from fib_create_info().
Signed-off-by: Sergey Popovich <popovich_sergei@mail.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Florian Westphal [Sun, 4 May 2014 21:24:31 +0000 (23:24 +0200)]
net: ipv4: ip_forward: fix inverted local_df test
[ Upstream commit
ca6c5d4ad216d5942ae544bbf02503041bd802aa ]
local_df means 'ignore DF bit if set', so if its set we're
allowed to perform ip fragmentation.
This wasn't noticed earlier because the output path also drops such skbs
(and emits needed icmp error) and because netfilter ip defrag did not
set local_df until couple of days ago.
Only difference is that DF-packets-larger-than MTU now discarded
earlier (f.e. we avoid pointless netfilter postrouting trip).
While at it, drop the repeated test ip_exceeds_mtu, checking it once
is enough...
Fixes:
fe6cc55f3a9 ("net: ip, ipv6: handle gso skbs in forwarding path")
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Liu Yu [Wed, 30 Apr 2014 09:34:09 +0000 (17:34 +0800)]
tcp_cubic: fix the range of delayed_ack
[ Upstream commit
0cda345d1b2201dd15591b163e3c92bad5191745 ]
commit
b9f47a3aaeab (tcp_cubic: limit delayed_ack ratio to prevent
divide error) try to prevent divide error, but there is still a little
chance that delayed_ack can reach zero. In case the param cnt get
negative value, then ratio+cnt would overflow and may happen to be zero.
As a result, min(ratio, ACK_RATIO_LIMIT) will calculate to be zero.
In some old kernels, such as 2.6.32, there is a bug that would
pass negative param, which then ultimately leads to this divide error.
commit
5b35e1e6e9c (tcp: fix tcp_trim_head() to adjust segment count
with skb MSS) fixed the negative param issue. However,
it's safe that we fix the range of delayed_ack as well,
to make sure we do not hit a divide by zero.
CC: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Liu Yu <allanyuliu@tencent.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Vlad Yasevich [Tue, 29 Apr 2014 14:09:51 +0000 (10:09 -0400)]
Revert "macvlan : fix checksums error when we are in bridge mode"
[ Upstream commit
f114890cdf84d753f6b41cd0cc44ba51d16313da ]
This reverts commit
12a2856b604476c27d85a5f9a57ae1661fc46019.
The commit above doesn't appear to be necessary any more as the
checksums appear to be correctly computed/validated.
Additionally the above commit breaks kvm configurations where
one VM is using a device that support checksum offload (virtio) and
the other VM does not.
In this case, packets leaving virtio device will have CHECKSUM_PARTIAL
set. The packets is forwarded to a macvtap that has offload features
turned off. Since we use CHECKSUM_UNNECESSARY, the host does does not
update the checksum and thus a bad checksum is passed up to
the guest.
CC: Daniel Lezcano <daniel.lezcano@free.fr>
CC: Patrick McHardy <kaber@trash.net>
CC: Andrian Nord <nightnord@gmail.com>
CC: Eric Dumazet <eric.dumazet@gmail.com>
CC: Michael S. Tsirkin <mst@redhat.com>
CC: Jason Wang <jasowang@redhat.com>
Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
David Gibson [Thu, 24 Apr 2014 00:22:36 +0000 (10:22 +1000)]
rtnetlink: Only supply IFLA_VF_PORTS information when RTEXT_FILTER_VF is set
[ Upstream commit
c53864fd60227de025cb79e05493b13f69843971 ]
Since
115c9b81928360d769a76c632bae62d15206a94a (rtnetlink: Fix problem with
buffer allocation), RTM_NEWLINK messages only contain the IFLA_VFINFO_LIST
attribute if they were solicited by a GETLINK message containing an
IFLA_EXT_MASK attribute with the RTEXT_FILTER_VF flag.
That was done because some user programs broke when they received more data
than expected - because IFLA_VFINFO_LIST contains information for each VF
it can become large if there are many VFs.
However, the IFLA_VF_PORTS attribute, supplied for devices which implement
ndo_get_vf_port (currently the 'enic' driver only), has the same problem.
It supplies per-VF information and can therefore become large, but it is
not currently conditional on the IFLA_EXT_MASK value.
Worse, it interacts badly with the existing EXT_MASK handling. When
IFLA_EXT_MASK is not supplied, the buffer for netlink replies is fixed at
NLMSG_GOODSIZE. If the information for IFLA_VF_PORTS exceeds this, then
rtnl_fill_ifinfo() returns -EMSGSIZE on the first message in a packet.
netlink_dump() will misinterpret this as having finished the listing and
omit data for this interface and all subsequent ones. That can cause
getifaddrs(3) to enter an infinite loop.
This patch addresses the problem by only supplying IFLA_VF_PORTS when
IFLA_EXT_MASK is supplied with the RTEXT_FILTER_VF flag set.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
David Gibson [Thu, 24 Apr 2014 00:22:35 +0000 (10:22 +1000)]
rtnetlink: Warn when interface's information won't fit in our packet
[ Upstream commit
973462bbde79bb827824c73b59027a0aed5c9ca6 ]
Without IFLA_EXT_MASK specified, the information reported for a single
interface in response to RTM_GETLINK is expected to fit within a netlink
packet of NLMSG_GOODSIZE.
If it doesn't, however, things will go badly wrong, When listing all
interfaces, netlink_dump() will incorrectly treat -EMSGSIZE on the first
message in a packet as the end of the listing and omit information for
that interface and all subsequent ones. This can cause getifaddrs(3) to
enter an infinite loop.
This patch won't fix the problem, but it will WARN_ON() making it easier to
track down what's going wrong.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Jiri Pirko <jpirko@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ivan Vecera [Thu, 17 Apr 2014 12:51:08 +0000 (14:51 +0200)]
tg3: update rx_jumbo_pending ring param only when jumbo frames are enabled
The patch fixes a problem with dropped jumbo frames after usage of
'ethtool -G ... rx'.
Scenario:
1. ip link set eth0 up
2. ethtool -G eth0 rx N # <- This zeroes rx-jumbo
3. ip link set mtu 9000 dev eth0
The ethtool command set rx_jumbo_pending to zero so any received jumbo
packets are dropped and you need to use 'ethtool -G eth0 rx-jumbo N'
to workaround the issue.
The patch changes the logic so rx_jumbo_pending value is changed only if
jumbo frames are enabled (MTU > 1500).
Signed-off-by: Ivan Vecera <ivecera@redhat.com>
Acked-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Mathias Krause [Sun, 13 Apr 2014 16:23:33 +0000 (18:23 +0200)]
filter: prevent nla extensions to peek beyond the end of the message
[ Upstream commit
05ab8f2647e4221cbdb3856dd7d32bd5407316b3 ]
The BPF_S_ANC_NLATTR and BPF_S_ANC_NLATTR_NEST extensions fail to check
for a minimal message length before testing the supplied offset to be
within the bounds of the message. This allows the subtraction of the nla
header to underflow and therefore -- as the data type is unsigned --
allowing far to big offset and length values for the search of the
netlink attribute.
The remainder calculation for the BPF_S_ANC_NLATTR_NEST extension is
also wrong. It has the minuend and subtrahend mixed up, therefore
calculates a huge length value, allowing to overrun the end of the
message while looking for the netlink attribute.
The following three BPF snippets will trigger the bugs when attached to
a UNIX datagram socket and parsing a message with length 1, 2 or 3.
,-[ PoC for missing size check in BPF_S_ANC_NLATTR ]--
| ld #0x87654321
| ldx #42
| ld #nla
| ret a
`---
,-[ PoC for the same bug in BPF_S_ANC_NLATTR_NEST ]--
| ld #0x87654321
| ldx #42
| ld #nlan
| ret a
`---
,-[ PoC for wrong remainder calculation in BPF_S_ANC_NLATTR_NEST ]--
| ; (needs a fake netlink header at offset 0)
| ld #0
| ldx #42
| ld #nlan
| ret a
`---
Fix the first issue by ensuring the message length fulfills the minimal
size constrains of a nla header. Fix the second bug by getting the math
for the remainder calculation right.
Fixes:
4738c1db15 ("[SKFILTER]: Add SKF_ADF_NLATTR instruction")
Fixes:
d214c7537b ("filter: add SKF_AD_NLATTR_NEST to look for nested..")
Cc: Patrick McHardy <kaber@trash.net>
Cc: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Acked-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Wang, Xiaoming [Mon, 14 Apr 2014 16:30:45 +0000 (12:30 -0400)]
net: ipv4: current group_info should be put after using.
[ Upstream commit
b04c46190219a4f845e46a459e3102137b7f6cac ]
Plug a group_info refcount leak in ping_init.
group_info is only needed during initialization and
the code failed to release the reference on exit.
While here move grabbing the reference to a place
where it is actually needed.
Signed-off-by: Chuansheng Liu <chuansheng.liu@intel.com>
Signed-off-by: Zhang Dongxing <dongxing.zhang@intel.com>
Signed-off-by: xiaoming wang <xiaoming.wang@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Eric Dumazet [Fri, 11 Apr 2014 04:23:36 +0000 (21:23 -0700)]
ipv6: Limit mtu to 65575 bytes
[ Upstream commit
30f78d8ebf7f514801e71b88a10c948275168518 ]
Francois reported that setting big mtu on loopback device could prevent
tcp sessions making progress.
We do not support (yet ?) IPv6 Jumbograms and cook corrupted packets.
We must limit the IPv6 MTU to (65535 + 40) bytes in theory.
Tested:
ifconfig lo mtu 70000
netperf -H ::1
Before patch : Throughput : 0.05 Mbits
After patch : Throughput : 35484 Mbits
Reported-by: Francois WELLENREITER <f.wellenreiter@gmail.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Thomas Richter [Wed, 9 Apr 2014 10:52:59 +0000 (12:52 +0200)]
bonding: Remove debug_fs files when module init fails
[ Upstream commit
db29868653394937037d71dc3545768302dda643 ]
Remove the bonding debug_fs entries when the
module initialization fails. The debug_fs
entries should be removed together with all other
already allocated resources.
Signed-off-by: Thomas Richter <tmricht@linux.vnet.ibm.com>
Signed-off-by: Jay Vosburgh <j.vosburgh@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Florian Westphal [Wed, 9 Apr 2014 08:28:50 +0000 (10:28 +0200)]
net: core: don't account for udp header size when computing seglen
[ Upstream commit
6d39d589bb76ee8a1c6cde6822006ae0053decff ]
In case of tcp, gso_size contains the tcpmss.
For UFO (udp fragmentation offloading) skbs, gso_size is the fragment
payload size, i.e. we must not account for udp header size.
Otherwise, when using virtio drivers, a to-be-forwarded UFO GSO packet
will be needlessly fragmented in the forward path, because we think its
individual segments are too large for the outgoing link.
Fixes:
fe6cc55f3a9a053 ("net: ip, ipv6: handle gso skbs in forwarding path")
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Reported-by: Tobias Brunner <tobias@strongswan.org>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Dmitry Petukhov [Tue, 8 Apr 2014 20:23:20 +0000 (02:23 +0600)]
l2tp: take PMTU from tunnel UDP socket
[ Upstream commit
f34c4a35d87949fbb0e0f31eba3c054e9f8199ba ]
When l2tp driver tries to get PMTU for the tunnel destination, it uses
the pointer to struct sock that represents PPPoX socket, while it
should use the pointer that represents UDP socket of the tunnel.
Signed-off-by: Dmitry Petukhov <dmgenp@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Daniel Borkmann [Wed, 9 Apr 2014 14:10:20 +0000 (16:10 +0200)]
net: sctp: test if association is dead in sctp_wake_up_waiters
[ Upstream commit
1e1cdf8ac78793e0875465e98a648df64694a8d0 ]
In function sctp_wake_up_waiters(), we need to involve a test
if the association is declared dead. If so, we don't have any
reference to a possible sibling association anymore and need
to invoke sctp_write_space() instead, and normally walk the
socket's associations and notify them of new wmem space. The
reason for special casing is that otherwise, we could run
into the following issue when a sctp_primitive_SEND() call
from sctp_sendmsg() fails, and tries to flush an association's
outq, i.e. in the following way:
sctp_association_free()
`-> list_del(&asoc->asocs) <-- poisons list pointer
asoc->base.dead = true
sctp_outq_free(&asoc->outqueue)
`-> __sctp_outq_teardown()
`-> sctp_chunk_free()
`-> consume_skb()
`-> sctp_wfree()
`-> sctp_wake_up_waiters() <-- dereferences poisoned pointers
if asoc->ep->sndbuf_policy=0
Therefore, only walk the list in an 'optimized' way if we find
that the current association is still active. We could also use
list_del_init() in addition when we call sctp_association_free(),
but as Vlad suggests, we want to trap such bugs and thus leave
it poisoned as is.
Why is it safe to resolve the issue by testing for asoc->base.dead?
Parallel calls to sctp_sendmsg() are protected under socket lock,
that is lock_sock()/release_sock(). Only within that path under
lock held, we're setting skb/chunk owner via sctp_set_owner_w().
Eventually, chunks are freed directly by an association still
under that lock. So when traversing association list on destruction
time from sctp_wake_up_waiters() via sctp_wfree(), a different
CPU can't be running sctp_wfree() while another one calls
sctp_association_free() as both happens under the same lock.
Therefore, this can also not race with setting/testing against
asoc->base.dead as we are guaranteed for this to happen in order,
under lock. Further, Vlad says: the times we check asoc->base.dead
is when we've cached an association pointer for later processing.
In between cache and processing, the association may have been
freed and is simply still around due to reference counts. We check
asoc->base.dead under a lock, so it should always be safe to check
and not race against sctp_association_free(). Stress-testing seems
fine now, too.
Fixes:
cd253f9f357d ("net: sctp: wake up all assocs if sndbuf policy is per socket")
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Cc: Vlad Yasevich <vyasevic@redhat.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Acked-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Daniel Borkmann [Tue, 8 Apr 2014 15:26:13 +0000 (17:26 +0200)]
net: sctp: wake up all assocs if sndbuf policy is per socket
[ Upstream commit
52c35befb69b005c3fc5afdaae3a5717ad013411 ]
SCTP charges chunks for wmem accounting via skb->truesize in
sctp_set_owner_w(), and sctp_wfree() respectively as the
reverse operation. If a sender runs out of wmem, it needs to
wait via sctp_wait_for_sndbuf(), and gets woken up by a call
to __sctp_write_space() mostly via sctp_wfree().
__sctp_write_space() is being called per association. Although
we assign sk->sk_write_space() to sctp_write_space(), which
is then being done per socket, it is only used if send space
is increased per socket option (SO_SNDBUF), as SOCK_USE_WRITE_QUEUE
is set and therefore not invoked in sock_wfree().
Commit
4c3a5bdae293 ("sctp: Don't charge for data in sndbuf
again when transmitting packet") fixed an issue where in case
sctp_packet_transmit() manages to queue up more than sndbuf
bytes, sctp_wait_for_sndbuf() will never be woken up again
unless it is interrupted by a signal. However, a still
remaining issue is that if net.sctp.sndbuf_policy=0, that is
accounting per socket, and one-to-many sockets are in use,
the reclaimed write space from sctp_wfree() is 'unfairly'
handed back on the server to the association that is the lucky
one to be woken up again via __sctp_write_space(), while
the remaining associations are never be woken up again
(unless by a signal).
The effect disappears with net.sctp.sndbuf_policy=1, that
is wmem accounting per association, as it guarantees a fair
share of wmem among associations.
Therefore, if we have reclaimed memory in case of per socket
accounting, wake all related associations to a socket in a
fair manner, that is, traverse the socket association list
starting from the current neighbour of the association and
issue a __sctp_write_space() to everyone until we end up
waking ourselves. This guarantees that no association is
preferred over another and even if more associations are
taken into the one-to-many session, all receivers will get
messages from the server and are not stalled forever on
high load. This setting still leaves the advantage of per
socket accounting in touch as an association can still use
up global limits if unused by others.
Fixes:
4eb701dfc618 ("[SCTP] Fix SCTP sendbuffer accouting.")
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Cc: Thomas Graf <tgraf@suug.ch>
Cc: Neil Horman <nhorman@tuxdriver.com>
Cc: Vlad Yasevich <vyasevic@redhat.com>
Acked-by: Vlad Yasevich <vyasevic@redhat.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Oleg Nesterov [Tue, 12 Nov 2013 23:10:01 +0000 (15:10 -0800)]
list: introduce list_next_entry() and list_prev_entry()
[ Upstream commit
008208c6b26f21c2648c250a09c55e737c02c5f8 ]
Add two trivial helpers list_next_entry() and list_prev_entry(), they
can have a lot of users including list.h itself. In fact the 1st one is
already defined in events/core.c and bnx2x_sp.c, so the patch simply
moves the definition to list.h.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Eilon Greenstein <eilong@broadcom.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
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 Deucher [Mon, 31 Mar 2014 15:19:46 +0000 (11:19 -0400)]
drm/radeon: call drm_edid_to_eld when we update the edid
commit
16086279353cbfecbb3ead474072dced17b97ddc upstream.
This needs to be done to update some of the fields in
the connector structure used by the audio code.
Noticed by several users on irc.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Christopher Friedt [Sat, 1 Feb 2014 15:01:15 +0000 (10:01 -0500)]
drm/vmwgfx: correct fb_fix_screeninfo.line_length
commit
aa6de142c901cd2d90ef08db30ae87da214bedcc upstream.
Previously, the vmwgfx_fb driver would allow users to call FBIOSET_VINFO, but it would not adjust
the FINFO properly, resulting in distorted screen rendering. The patch corrects that behaviour.
See https://bugs.gentoo.org/show_bug.cgi?id=494794 for examples.
Signed-off-by: Christopher Friedt <chrisfriedt@gmail.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Bjørn Mork [Fri, 25 Apr 2014 16:49:20 +0000 (18:49 +0200)]
usb: option: add and update a number of CMOTech devices
commit
34f972d6156fe9eea2ab7bb418c71f9d1d5c8e7b upstream.
A number of older CMOTech modems are based on Qualcomm
chips. The blacklisted interfaces are QMI/wwan.
Reported-by: Lars Melin <larsm17@gmail.com>
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Bjørn Mork [Fri, 25 Apr 2014 16:49:19 +0000 (18:49 +0200)]
usb: option: add Alcatel L800MA
commit
dd6b48ecec2ea7d15f28d5e5474388681899a5e1 upstream.
Device interface layout:
0: ff/ff/ff - serial
1: ff/00/00 - serial AT+PPP
2: ff/ff/ff - QMI/wwan
3: 08/06/50 - storage
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Bjørn Mork [Fri, 25 Apr 2014 16:49:18 +0000 (18:49 +0200)]
usb: option: add Olivetti Olicard 500
commit
533b3994610f316e5cd61b56d0c4daa15c830f89 upstream.
Device interface layout:
0: ff/ff/ff - serial
1: ff/ff/ff - serial AT+PPP
2: 08/06/50 - storage
3: ff/ff/ff - serial
4: ff/ff/ff - QMI/wwan
Reported-by: Julio Araujo <julio.araujo@wllctel.com.br>
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Johan Hovold [Fri, 25 Apr 2014 13:23:03 +0000 (15:23 +0200)]
USB: io_ti: fix firmware download on big-endian machines
commit
5509076d1b4485ce9fb07705fcbcd2695907ab5b upstream.
During firmware download the device expects memory addresses in
big-endian byte order. As the wIndex parameter which hold the address is
sent in little-endian byte order regardless of host byte order, we need
to use swab16 rather than cpu_to_be16.
Also make sure to handle the struct ti_i2c_desc size parameter which is
returned in little-endian byte order.
Reported-by: Ludovic Drolez <ldrolez@debian.org>
Tested-by: Ludovic Drolez <ldrolez@debian.org>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Johan Hovold [Fri, 28 Mar 2014 17:05:10 +0000 (18:05 +0100)]
Revert "USB: serial: add usbid for dell wwan card to sierra.c"
commit
2e01280d2801c72878cf3a7119eac30077b463d5 upstream.
This reverts commit
1ebca9dad5abe8b2ed4dbd186cd657fb47c1f321.
This device was erroneously added to the sierra driver even though it's
not a Sierra device and was already handled by the option driver.
Cc: Richard Farina <sidhayn@gmail.com>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Daniele Palmas [Wed, 2 Apr 2014 09:19:48 +0000 (11:19 +0200)]
usb: option driver, add support for Telit UE910v2
commit
d6de486bc22255779bd54b0fceb4c240962bf146 upstream.
option driver, added VID/PID for Telit UE910v2 modem
Signed-off-by: Daniele Palmas <dnlplm@gmail.com>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Michele Baldessari [Mon, 31 Mar 2014 08:51:00 +0000 (10:51 +0200)]
USB: serial: ftdi_sio: add id for Brainboxes serial cards
commit
efe26e16b1d93ac0085e69178cc18811629e8fc5 upstream.
Custom VID/PIDs for Brainboxes cards as reported in
https://bugzilla.redhat.com/show_bug.cgi?id=1071914
Signed-off-by: Michele Baldessari <michele@acksyn.org>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Tristan Bruns [Sun, 13 Apr 2014 21:57:16 +0000 (23:57 +0200)]
USB: cp210x: Add 8281 (Nanotec Plug & Drive)
commit
72b3007951010ce1bbf950e23b19d9839fa905a5 upstream.
Signed-off-by: Tristan Bruns <tristan@tristanbruns.de>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Michael Ulbricht [Tue, 25 Mar 2014 09:34:18 +0000 (10:34 +0100)]
USB: cdc-acm: Remove Motorola/Telit H24 serial interfaces from ACM driver
commit
895d240d1db0b2736d779200788e4c4aea28a0c6 upstream.
By specifying NO_UNION_NORMAL the ACM driver does only use the first two
USB interfaces (modem data & control). The AT Port, Diagnostic and NMEA
interfaces are left to the USB serial driver.
Signed-off-by: Michael Ulbricht <michael.ulbricht@systec-electronic.com>
Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: Oliver Neukum <oliver@neukum.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Mizuma, Masayoshi [Fri, 18 Apr 2014 22:07:18 +0000 (15:07 -0700)]
mm/hugetlb.c: add cond_resched_lock() in return_unused_surplus_pages()
commit
7848a4bf51b34f41fcc9bd77e837126d99ae84e3 upstream.
soft lockup in freeing gigantic hugepage fixed in commit
55f67141a892 "mm:
hugetlb: fix softlockup when a large number of hugepages are freed." can
happen in return_unused_surplus_pages(), so let's fix it.
Signed-off-by: Masayoshi Mizuma <m.mizuma@jp.fujitsu.com>
Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Aneesh Kumar <aneesh.kumar@linux.vnet.ibm.com>
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>
Helge Deller [Sat, 12 Apr 2014 22:03:55 +0000 (00:03 +0200)]
parisc: fix epoll_pwait syscall on compat kernel
commit
ab3e55b119c9653b19ea4edffb86f04db867ac98 upstream.
This bug was detected with the libio-epoll-perl debian package where the
test case IO-Ppoll-compat.t failed.
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Greg Kroah-Hartman [Sun, 18 May 2014 12:26:09 +0000 (05:26 -0700)]
Linux 3.4.91
Mikulas Patocka [Thu, 23 Jan 2014 19:42:43 +0000 (14:42 -0500)]
tgafb: fix mode setting with fbset
commit
624966589041deb32a2626ee2e176e8274581101 upstream.
Mode setting in the TGA driver is broken for these reasons:
- info->fix.line_length is set just once in tgafb_init_fix function. If
we change videomode, info->fix.line_length is not recalculated - so
the video mode is changed but the screen is corrupted because of wrong
info->fix.line_length.
- info->fix.smem_len is set in tgafb_init_fix to the size of the default
video mode (640x480). If we set a higher resolution,
info->fix.smem_len is smaller than the current screen size, preventing
the userspace program from mapping the framebuffer.
This patch fixes it:
- info->fix.line_length initialization is moved to tgafb_set_par so that
it is recalculated with each mode change.
- info->fix.smem_len is set to a fixed value representing the real
amount of video ram (the values are taken from xfree86 driver).
- add a check to tgafb_check_var to prevent us from setting a videomode
that doesn't fit into videoram.
- in tgafb_register, tgafb_init_fix is moved upwards, to be called
before fb_find_mode (because fb_find_mode already needs the videoram
size set in tgafb_init_fix).
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Andreas Schwab [Mon, 30 Dec 2013 14:31:17 +0000 (15:31 +0100)]
powerpc: Add vr save/restore functions
commit
8fe9c93e7453e67b8bd09f263ec1bb0783c733fc upstream.
GCC 4.8 now generates out-of-line vr save/restore functions when
optimizing for size. They are needed for the raid6 altivec support.
Signed-off-by: Andreas Schwab <schwab@linux-m68k.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Steven Rostedt (Red Hat) [Wed, 26 Feb 2014 15:54:36 +0000 (10:54 -0500)]
tracepoint: Do not waste memory on mods with no tracepoints
commit
7dec935a3aa04412cba2cebe1524ae0d34a30c24 upstream.
No reason to allocate tp_module structures for modules that have no
tracepoints. This just wastes memory.
Fixes:
b75ef8b44b1c "Tracepoint: Dissociate from module mutex"
Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Thomas Graf [Fri, 4 Apr 2014 15:57:45 +0000 (17:57 +0200)]
netfilter: Can't fail and free after table replacement
commit
c58dd2dd443c26d856a168db108a0cd11c285bf3 upstream.
All xtables variants suffer from the defect that the copy_to_user()
to copy the counters to user memory may fail after the table has
already been exchanged and thus exposed. Return an error at this
point will result in freeing the already exposed table. Any
subsequent packet processing will result in a kernel panic.
We can't copy the counters before exposing the new tables as we
want provide the counter state after the old table has been
unhooked. Therefore convert this into a silent error.
Cc: Florian Westphal <fw@strlen.de>
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Joe Perches [Sun, 13 May 2012 21:56:25 +0000 (21:56 +0000)]
net: Add net_ratelimited_function and net_<level>_ratelimited macros
commit
3a3bfb61e64476ff1e4ac3122cb6dec9c79b795c upstream.
__ratelimit() can be considered an inverted bool test because
it returns true when not ratelimited. Several tests in the
kernel tree use this __ratelimit() function incorrectly.
No net_ratelimit uses are incorrect currently though.
Most uses of net_ratelimit are to log something via printk or
pr_<level>.
In order to minimize the uses of net_ratelimit, and to start
standardizing the code style used for __ratelimit() and net_ratelimit(),
add a net_ratelimited_function() macro and net_<level>_ratelimited()
logging macros similar to pr_<level>_ratelimited that use the global
net_ratelimit instead of a static per call site "struct ratelimit_state".
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Andrey Vagin [Fri, 28 Mar 2014 09:54:32 +0000 (13:54 +0400)]
netfilter: nf_conntrack: reserve two bytes for nf_ct_ext->len
commit
223b02d923ecd7c84cf9780bb3686f455d279279 upstream.
"len" contains sizeof(nf_ct_ext) and size of extensions. In a worst
case it can contain all extensions. Bellow you can find sizes for all
types of extensions. Their sum is definitely bigger than 256.
nf_ct_ext_types[0]->len = 24
nf_ct_ext_types[1]->len = 32
nf_ct_ext_types[2]->len = 24
nf_ct_ext_types[3]->len = 32
nf_ct_ext_types[4]->len = 152
nf_ct_ext_types[5]->len = 2
nf_ct_ext_types[6]->len = 16
nf_ct_ext_types[7]->len = 8
I have seen "len" up to 280 and my host has crashes w/o this patch.
The right way to fix this problem is reducing the size of the ecache
extension (4) and Florian is going to do this, but these changes will
be quite large to be appropriate for a stable tree.
Fixes:
5b423f6a40a0 (netfilter: nf_conntrack: fix racy timer handling with reliable)
Cc: Pablo Neira Ayuso <pablo@netfilter.org>
Cc: Patrick McHardy <kaber@trash.net>
Cc: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Roman Pen [Tue, 4 Mar 2014 14:13:10 +0000 (23:13 +0900)]
blktrace: fix accounting of partially completed requests
commit
af5040da01ef980670b3741b3e10733ee3e33566 upstream.
trace_block_rq_complete does not take into account that request can
be partially completed, so we can get the following incorrect output
of blkparser:
C R 232 + 240 [0]
C R 240 + 232 [0]
C R 248 + 224 [0]
C R 256 + 216 [0]
but should be:
C R 232 + 8 [0]
C R 240 + 8 [0]
C R 248 + 8 [0]
C R 256 + 8 [0]
Also, the whole output summary statistics of completed requests and
final throughput will be incorrect.
This patch takes into account real completion size of the request and
fixes wrong completion accounting.
Signed-off-by: Roman Pen <r.peniaev@gmail.com>
CC: Steven Rostedt <rostedt@goodmis.org>
CC: Frederic Weisbecker <fweisbec@gmail.com>
CC: Ingo Molnar <mingo@redhat.com>
CC: linux-kernel@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Peter Hurley [Sat, 3 May 2014 12:04:59 +0000 (14:04 +0200)]
n_tty: Fix n_tty_write crash when echoing in raw mode
commit
4291086b1f081b869c6d79e5b7441633dc3ace00 upstream.
The tty atomic_write_lock does not provide an exclusion guarantee for
the tty driver if the termios settings are LECHO & !OPOST. And since
it is unexpected and not allowed to call TTY buffer helpers like
tty_insert_flip_string concurrently, this may lead to crashes when
concurrect writers call pty_write. In that case the following two
writers:
* the ECHOing from a workqueue and
* pty_write from the process
race and can overflow the corresponding TTY buffer like follows.
If we look into tty_insert_flip_string_fixed_flag, there is:
int space = __tty_buffer_request_room(port, goal, flags);
struct tty_buffer *tb = port->buf.tail;
...
memcpy(char_buf_ptr(tb, tb->used), chars, space);
...
tb->used += space;
so the race of the two can result in something like this:
A B
__tty_buffer_request_room
__tty_buffer_request_room
memcpy(buf(tb->used), ...)
tb->used += space;
memcpy(buf(tb->used), ...) ->BOOM
B's memcpy is past the tty_buffer due to the previous A's tb->used
increment.
Since the N_TTY line discipline input processing can output
concurrently with a tty write, obtain the N_TTY ldisc output_lock to
serialize echo output with normal tty writes. This ensures the tty
buffer helper tty_insert_flip_string is not called concurrently and
everything is fine.
Note that this is nicely reproducible by an ordinary user using
forkpty and some setup around that (raw termios + ECHO). And it is
present in kernels at least after commit
d945cb9cce20ac7143c2de8d88b187f62db99bdc (pty: Rework the pty layer to
use the normal buffering logic) in 2.6.31-rc3.
js: add more info to the commit log
js: switch to bool
js: lock unconditionally
js: lock only the tty->ops->write call
References: CVE-2014-0196
Reported-and-tested-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[bwh: Backported to 3.2: output_lock is a member of struct tty_struct]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Dan Carpenter [Wed, 30 Oct 2013 17:13:51 +0000 (20:13 +0300)]
SCSI: megaraid: missing bounds check in mimd_to_kioc()
commit
3de2260140417759c669d391613d583baf03b0cf upstream.
pthru32->dataxferlen comes from the user so we need to check that it's
not too large so we don't overflow the buffer.
Reported-by: Nico Golde <nico@ngolde.de>
Reported-by: Fabian Yamaguchi <fabs@goesec.de>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Sumit Saxena <sumit.saxena@lsi.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Greg Kroah-Hartman [Tue, 13 May 2014 12:11:45 +0000 (14:11 +0200)]
Linux 3.4.90
Mike Snitzer [Fri, 28 Mar 2014 06:15:02 +0000 (02:15 -0400)]
dm thin: fix dangling bio in process_deferred_bios error path
commit
fe76cd88e654124d1431bb662a0fc6e99ca811a5 upstream.
If unable to ensure_next_mapping() we must add the current bio, which
was removed from the @bios list via bio_list_pop, back to the
deferred_bios list before all the remaining @bios.
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Acked-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Giacomo Comes [Thu, 3 Apr 2014 18:13:55 +0000 (14:13 -0400)]
Skip intel_crt_init for Dell XPS 8700
commit
10b6ee4a87811a110cb01eaca01eb04da6801baf upstream.
The Dell XPS 8700 has a onboard Display port and HDMI port and no VGA port.
The call intel_crt_init freeze the machine, so skip such call.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=73559
Signed-off-by: Giacomo Comes <comes at naic.edu>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Dan Carpenter [Thu, 5 Dec 2013 14:53:50 +0000 (17:53 +0300)]
mtd: sm_ftl: heap corruption in sm_create_sysfs_attributes()
commit
b4c233057771581698a13694ab6f33b48ce837dc upstream.
We always put a NUL terminator one space past the end of the "vendor"
buffer. Walter Harms also pointed out that this should just use
kstrndup().
Fixes:
7d17c02a01a1 ('mtd: Add new SmartMedia/xD FTL')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Dan Carpenter [Mon, 17 Feb 2014 20:03:08 +0000 (23:03 +0300)]
mtd: nuc900_nand: NULL dereference in nuc900_nand_enable()
commit
c69dbbf3335a21aae74376d7e5db50a486d52439 upstream.
Instead of writing to "nand->reg + REG_FMICSR" we write to "REG_FMICSR"
which is NULL and not a valid register.
Fixes:
8bff82cbc308 ('mtd: add nand support for w90p910 (v2)')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Mikulas Patocka [Thu, 23 Jan 2014 19:43:10 +0000 (14:43 -0500)]
tgafb: fix data copying
commit
6b0df6827bb6fcacb158dff29ad0a62d6418b534 upstream.
The functions for data copying copyarea_foreward_8bpp and
copyarea_backward_8bpp are buggy, they produce screen corruption.
This patch fixes the functions and moves the logic to one function
"copyarea_8bpp". For simplicity, the function only handles copying that
is aligned on 8 pixes. If we copy an unaligned area, generic function
cfb_copyarea is used.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Marek Vasut [Mon, 24 Mar 2014 02:38:10 +0000 (03:38 +0100)]
gpio: mxs: Allow for recursive enable_irq_wake() call
commit
a585f87c863e4e1d496459d382b802bf5ebe3717 upstream.
The scenario here is that someone calls enable_irq_wake() from somewhere
in the code. This will result in the lockdep producing a backtrace as can
be seen below. In my case, this problem is triggered when using the wl1271
(TI WlCore) driver found in drivers/net/wireless/ti/ .
The problem cause is rather obvious from the backtrace, but let's outline
the dependency. enable_irq_wake() grabs the IRQ buslock in irq_set_irq_wake(),
which in turns calls mxs_gpio_set_wake_irq() . But mxs_gpio_set_wake_irq()
calls enable_irq_wake() again on the one-level-higher IRQ , thus it tries to
grab the IRQ buslock again in irq_set_irq_wake() . Because the spinlock in
irq_set_irq_wake()->irq_get_desc_buslock()->__irq_get_desc_lock() is not
marked as recursive, lockdep will spew the stuff below.
We know we can safely re-enter the lock, so use IRQ_GC_INIT_NESTED_LOCK to
fix the spew.
=============================================
[ INFO: possible recursive locking detected ]
3.10.33-00012-gf06b763-dirty #61 Not tainted
---------------------------------------------
kworker/0:1/18 is trying to acquire lock:
(&irq_desc_lock_class){-.-...}, at: [<
c00685f0>] __irq_get_desc_lock+0x48/0x88
but task is already holding lock:
(&irq_desc_lock_class){-.-...}, at: [<
c00685f0>] __irq_get_desc_lock+0x48/0x88
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(&irq_desc_lock_class);
lock(&irq_desc_lock_class);
*** DEADLOCK ***
May be due to missing lock nesting notation
3 locks held by kworker/0:1/18:
#0: (events){.+.+.+}, at: [<
c0036308>] process_one_work+0x134/0x4a4
#1: ((&fw_work->work)){+.+.+.}, at: [<
c0036308>] process_one_work+0x134/0x4a4
#2: (&irq_desc_lock_class){-.-...}, at: [<
c00685f0>] __irq_get_desc_lock+0x48/0x88
stack backtrace:
CPU: 0 PID: 18 Comm: kworker/0:1 Not tainted 3.10.33-00012-gf06b763-dirty #61
Workqueue: events request_firmware_work_func
[<
c0013eb4>] (unwind_backtrace+0x0/0xf0) from [<
c0011c74>] (show_stack+0x10/0x14)
[<
c0011c74>] (show_stack+0x10/0x14) from [<
c005bb08>] (__lock_acquire+0x140c/0x1a64)
[<
c005bb08>] (__lock_acquire+0x140c/0x1a64) from [<
c005c6a8>] (lock_acquire+0x9c/0x104)
[<
c005c6a8>] (lock_acquire+0x9c/0x104) from [<
c051d5a4>] (_raw_spin_lock_irqsave+0x44/0x58)
[<
c051d5a4>] (_raw_spin_lock_irqsave+0x44/0x58) from [<
c00685f0>] (__irq_get_desc_lock+0x48/0x88)
[<
c00685f0>] (__irq_get_desc_lock+0x48/0x88) from [<
c0068e78>] (irq_set_irq_wake+0x20/0xf4)
[<
c0068e78>] (irq_set_irq_wake+0x20/0xf4) from [<
c027260c>] (mxs_gpio_set_wake_irq+0x1c/0x24)
[<
c027260c>] (mxs_gpio_set_wake_irq+0x1c/0x24) from [<
c0068cf4>] (set_irq_wake_real+0x30/0x44)
[<
c0068cf4>] (set_irq_wake_real+0x30/0x44) from [<
c0068ee4>] (irq_set_irq_wake+0x8c/0xf4)
[<
c0068ee4>] (irq_set_irq_wake+0x8c/0xf4) from [<
c0310748>] (wlcore_nvs_cb+0x10c/0x97c)
[<
c0310748>] (wlcore_nvs_cb+0x10c/0x97c) from [<
c02be5e8>] (request_firmware_work_func+0x38/0x58)
[<
c02be5e8>] (request_firmware_work_func+0x38/0x58) from [<
c0036394>] (process_one_work+0x1c0/0x4a4)
[<
c0036394>] (process_one_work+0x1c0/0x4a4) from [<
c0036a4c>] (worker_thread+0x138/0x394)
[<
c0036a4c>] (worker_thread+0x138/0x394) from [<
c003cb74>] (kthread+0xa4/0xb0)
[<
c003cb74>] (kthread+0xa4/0xb0) from [<
c000ee00>] (ret_from_fork+0x14/0x34)
wlcore: loaded
Signed-off-by: Marek Vasut <marex@denx.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Larry Finger [Tue, 4 Mar 2014 22:53:51 +0000 (16:53 -0600)]
rtlwifi: rtl8192se: Fix too long disable of IRQs
commit
2610decdd0b3808ba20471a999835cfee5275f98 upstream.
In commit
f78bccd79ba3cd9d9664981b501d57bdb81ab8a4 entitled "rtlwifi:
rtl8192ce: Fix too long disable of IRQs", Olivier Langlois
<olivier@trillion01.com> fixed a problem caused by an extra long disabling
of interrupts. This patch makes the same fix for rtl8192se.
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Larry Finger [Tue, 4 Mar 2014 22:53:50 +0000 (16:53 -0600)]
rtlwifi: rtl8192cu: Fix too long disable of IRQs
commit
a53268be0cb9763f11da4f6fe3fb924cbe3a7d4a upstream.
In commit
f78bccd79ba3cd9d9664981b501d57bdb81ab8a4 entitled "rtlwifi:
rtl8192ce: Fix too long disable of IRQs", Olivier Langlois
<olivier@trillion01.com> fixed a problem caused by an extra long disabling
of interrupts. This patch makes the same fix for rtl8192cu.
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>
Jeff Layton [Tue, 15 Apr 2014 12:44:12 +0000 (08:44 -0400)]
locks: allow __break_lease to sleep even when break_time is 0
commit
4991a628a789dc5954e98e79476d9808812292ec upstream.
A fl->fl_break_time of 0 has a special meaning to the lease break code
that basically means "never break the lease". knfsd uses this to ensure
that leases don't disappear out from under it.
Unfortunately, the code in __break_lease can end up passing this value
to wait_event_interruptible as a timeout, which prevents it from going
to sleep at all. This causes __break_lease to spin in a tight loop and
causes soft lockups.
Fix this by ensuring that we pass a minimum value of 1 as a timeout
instead.
Cc: J. Bruce Fields <bfields@fieldses.org>
Reported-by: Terry Barnaby <terry1@beam.ltd.uk>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Dan Williams [Thu, 17 Apr 2014 18:48:21 +0000 (11:48 -0700)]
libata/ahci: accommodate tag ordered controllers
commit
8a4aeec8d2d6a3edeffbdfae451cdf05cbf0fefd upstream.
The AHCI spec allows implementations to issue commands in tag order
rather than FIFO order:
5.3.2.12 P:SelectCmd
HBA sets pSlotLoc = (pSlotLoc + 1) mod (CAP.NCS + 1)
or HBA selects the command to issue that has had the
PxCI bit set to '1' longer than any other command
pending to be issued.
The result is that commands posted sequentially (time-wise) may play out
of sequence when issued by hardware.
This behavior has likely been hidden by drives that arrange for commands
to complete in issue order. However, it appears recent drives (two from
different vendors that we have found so far) inflict out-of-order
completions as a matter of course. So, we need to take care to maintain
ordered submission, otherwise we risk triggering a drive to fall out of
sequential-io automation and back to random-io processing, which incurs
large latency and degrades throughput.
This issue was found in simple benchmarks where QD=2 seq-write
performance was 30-50% *greater* than QD=32 seq-write performance.
Tagging for -stable and making the change globally since it has a low
risk-to-reward ratio. Also, word is that recent versions of an unnamed
OS also does it this way now. So, drives in the field are already
experienced with this tag ordering scheme.
Cc: Dave Jiang <dave.jiang@intel.com>
Cc: Ed Ciechanowski <ed.ciechanowski@intel.com>
Reviewed-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Rafał Miłecki [Sat, 5 Apr 2014 16:08:25 +0000 (18:08 +0200)]
b43: Fix machine check error due to improper access of B43_MMIO_PSM_PHY_HDR
commit
12cd43c6ed6da7bf7c5afbd74da6959cda6d056b upstream.
Register B43_MMIO_PSM_PHY_HDR is 16 bit one, so accessing it with 32b
functions isn't safe. On my machine it causes delayed (!) CPU exception:
Disabling lock debugging due to kernel taint
mce: [Hardware Error]: CPU 0: Machine Check Exception: 4 Bank 4:
b200000000070f0f
mce: [Hardware Error]: TSC
164083803dc
mce: [Hardware Error]: PROCESSOR 2:20fc2 TIME
1396650505 SOCKET 0 APIC 0 microcode 0
mce: [Hardware Error]: Run the above through 'mcelog --ascii'
mce: [Hardware Error]: Machine check: Processor context corrupt
Kernel panic - not syncing: Fatal machine check on current CPU
Kernel Offset: 0x0 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffff9fffffff)
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Acked-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Mikulas Patocka [Thu, 23 Jan 2014 19:41:59 +0000 (14:41 -0500)]
mach64: fix cursor when character width is not a multiple of 8 pixels
commit
43751a1b8ee2e70ce392bf31ef3133da324e68b3 upstream.
This patch fixes the hardware cursor on mach64 when font width is not a
multiple of 8 pixels.
If you load such a font, the cursor is expanded to the next 8-byte
boundary and a part of the next character after the cursor is not
visible.
For example, when you load a font with 12-pixel width, the cursor width
is 16 pixels and when the cursor is displayed, 4 pixels of the next
character are not visible.
The reason is this: atyfb_cursor is called with proper parameters to
load an image that is 12-pixel wide. However, the number is aligned on
the next 8-pixel boundary on the line
"unsigned int width = (cursor->image.width + 7) >> 3;" and the whole
function acts as it is was loading a 16-pixel image.
This patch fixes it so that the value written to the framebuffer is
padded with 0xaaaa (the transparent pattern) when the image size it not
a multiple of 8 pixels. The transparent pattern causes that the cursor
will not interfere with the next character.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Mikulas Patocka [Thu, 23 Jan 2014 19:41:09 +0000 (14:41 -0500)]
mach64: use unaligned access
commit
c29dd8696dc5dbd50b3ac441b8a26751277ba520 upstream.
This patch fixes mach64 to use unaligned access to the font bitmap.
This fixes unaligned access warning on sparc64 when 14x8 font is loaded.
On x86(64), unaligned access is handled in hardware, so both functions
le32_to_cpup and get_unaligned_le32 perform the same operation.
On RISC machines, unaligned access is not handled in hardware, so we
better use get_unaligned_le32 to avoid the unaligned trap and warning.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Mikulas Patocka [Thu, 23 Jan 2014 19:39:04 +0000 (14:39 -0500)]
matroxfb: restore the registers M_ACCESS and M_PITCH
commit
a772d4736641ec1b421ad965e13457c17379fc86 upstream.
When X11 is running and the user switches back to console, the card
modifies the content of registers M_MACCESS and M_PITCH in periodic
intervals.
This patch fixes it by restoring the content of these registers before
issuing any accelerator command.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Mikulas Patocka [Thu, 23 Jan 2014 19:39:29 +0000 (14:39 -0500)]
framebuffer: fix cfb_copyarea
commit
00a9d699bc85052d2d3ed56251cd928024ce06a3 upstream.
The function cfb_copyarea is buggy when the copy operation is not aligned on
long boundary (4 bytes on 32-bit machines, 8 bytes on 64-bit machines).
How to reproduce:
- use x86-64 machine
- use a framebuffer driver without acceleration (for example uvesafb)
- set the framebuffer to 8-bit depth
(for example fbset -a 1024x768-60 -depth 8)
- load a font with character width that is not a multiple of 8 pixels
note: the console-tools package cannot load a font that has
width different from 8 pixels. You need to install the packages
"kbd" and "console-terminus" and use the program "setfont" to
set font width (for example: setfont Uni2-Terminus20x10)
- move some text left and right on the bash command line and you get a
screen corruption
To expose more bugs, put this line to the end of uvesafb_init_info:
info->flags |= FBINFO_HWACCEL_COPYAREA | FBINFO_READS_FAST;
- Now framebuffer console will use cfb_copyarea for console scrolling.
You get a screen corruption when console is scrolled.
This patch is a rewrite of cfb_copyarea. It fixes the bugs, with this
patch, console scrolling in 8-bit depth with a font width that is not a
multiple of 8 pixels works fine.
The cfb_copyarea code was very buggy and it looks like it was written
and never tried with non-8-pixel font.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ard Biesheuvel [Thu, 27 Mar 2014 17:14:40 +0000 (18:14 +0100)]
crypto: ghash-clmulni-intel - use C implementation for setkey()
commit
8ceee72808d1ae3fb191284afc2257a2be964725 upstream.
The GHASH setkey() function uses SSE registers but fails to call
kernel_fpu_begin()/kernel_fpu_end(). Instead of adding these calls, and
then having to deal with the restriction that they cannot be called from
interrupt context, move the setkey() implementation to the C domain.
Note that setkey() does not use any particular SSE features and is not
expected to become a performance bottleneck.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: H. Peter Anvin <hpa@linux.intel.com>
Fixes:
0e1227d356e9b (crypto: ghash - Add PCLMULQDQ accelerated implementation)
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Tyler Stachecki [Fri, 25 Apr 2014 20:41:04 +0000 (16:41 -0400)]
mpt2sas: Don't disable device twice at suspend.
commit
af61e27c3f77c7623b5335590ae24b6a5c323e22 upstream.
On suspend, _scsih_suspend calls mpt2sas_base_free_resources, which
in turn calls pci_disable_device if the device is enabled prior to
suspending. However, _scsih_suspend also calls pci_disable_device
itself.
Thus, in the event that the device is enabled prior to suspending,
pci_disable_device will be called twice. This patch removes the
duplicate call to pci_disable_device in _scsi_suspend as it is both
unnecessary and results in a kernel oops.
Signed-off-by: Tyler Stachecki <tstache1@binghamton.edu>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Rusty Russell [Thu, 13 Mar 2014 00:53:38 +0000 (11:23 +1030)]
virtio_balloon: don't softlockup on huge balloon changes.
commit
1f74ef0f2d7d692fcd615621e0e734c3e7771413 upstream.
When adding or removing 100G from a balloon:
BUG: soft lockup - CPU#0 stuck for 22s! [vballoon:367]
We have a wait_event_interruptible(), but the condition is always true
(more ballooning to do) so we don't ever sleep. We also have a
wait_event() for the host to ack, but that is also always true as QEMU
is synchronous for balloon operations.
Reported-by: Gopesh Kumar Chaudhary <gopchaud@in.ibm.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Huacai Chen [Sat, 22 Mar 2014 09:21:44 +0000 (17:21 +0800)]
MIPS: Hibernate: Flush TLB entries in swsusp_arch_resume()
commit
c14af233fbe279d0e561ecf84f1208b1bae087ef upstream.
The original MIPS hibernate code flushes cache and TLB entries in
swsusp_arch_resume(). But they are removed in Commit
44eeab67416711
(MIPS: Hibernation: Remove SMP TLB and cacheflushing code.). A cross-
CPU flush is surely unnecessary because all but the local CPU have
already been disabled. But a local flush (at least the TLB flush) is
needed. When we do hibernation on Loongson-3 with an E1000E NIC, it is
very easy to produce a kernel panic (kernel page fault, or unaligned
access). The root cause is E1000E driver use vzalloc_node() to allocate
pages, the stale TLB entries of the booting kernel will be misused by
the resumed target kernel.
Signed-off-by: Huacai Chen <chenhc@lemote.com>
Cc: John Crispin <john@phrozen.org>
Cc: Steven J. Hill <Steven.Hill@imgtec.com>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Cc: linux-mips@linux-mips.org
Cc: Fuxin Zhang <zhangfx@lemote.com>
Cc: Zhangjin Wu <wuzhangjin@gmail.com>
Patchwork: https://patchwork.linux-mips.org/patch/6643/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Matthew Daley [Mon, 28 Apr 2014 07:05:21 +0000 (19:05 +1200)]
floppy: don't write kernel-only members to FDRAWCMD ioctl output
commit
2145e15e0557a01b9195d1c7199a1b92cb9be81f upstream.
Do not leak kernel-only floppy_raw_cmd structure members to userspace.
This includes the linked-list pointer and the pointer to the allocated
DMA space.
Signed-off-by: Matthew Daley <mattd@bugfuzz.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Matthew Daley [Mon, 28 Apr 2014 07:05:20 +0000 (19:05 +1200)]
floppy: ignore kernel-only members in FDRAWCMD ioctl input
commit
ef87dbe7614341c2e7bfe8d32fcb7028cc97442c upstream.
Always clear out these floppy_raw_cmd struct members after copying the
entire structure from userspace so that the in-kernel version is always
valid and never left in an interdeterminate state.
Signed-off-by: Matthew Daley <mattd@bugfuzz.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>