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On module unload/remove, we need to ensure that work does not run
after we have freed resources. Concretely, cancel_delayed_work()
may return while the callback function is still running.
From kernel/workqueue.c:
The work callback function may still be running on return,
unless it returns true and the work doesn't re-arm itself.
Explicitly flush or use cancel_delayed_work_sync() to wait on it.
Link: https://lore.kernel.org/lkml/20190204220952.30761-1-TheSven73@googlemail.com/
Reported-by: Sven Van Asbroeck <thesven73@gmail.com>
Reviewed-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Reviewed-by: Sven Van Asbroeck <TheSven73@gmail.com>
Acked-by: Robin van der Gracht <robin@protonic.nl>
Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
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The following commit
441dae8f2f29 ("tracing: Add support for display of tgid in trace output")
removed the call to print_event_info() from print_func_help_header_irq()
which results in the ftrace header not reporting the number of entries
written in the buffer. As this wasn't the original intent of the patch,
re-introduce the call to print_event_info() to restore the orginal
behaviour.
Link: http://lkml.kernel.org/r/20190214152950.4179-1-quentin.perret@arm.com
Acked-by: Joel Fernandes <joelaf@google.com>
Cc: stable@vger.kernel.org
Fixes: 441dae8f2f29 ("tracing: Add support for display of tgid in trace output")
Signed-off-by: Quentin Perret <quentin.perret@arm.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
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The userspace can ask kprobe to intercept strings at any memory address,
including invalid kernel address. In this case, fetch_store_strlen()
would crash since it uses general usercopy function, and user access
functions are no longer allowed to access kernel memory.
For example, we can crash the kernel by doing something as below:
$ sudo kprobe 'p:do_sys_open +0(+0(%si)):string'
[ 103.620391] BUG: GPF in non-whitelisted uaccess (non-canonical address?)
[ 103.622104] general protection fault: 0000 [#1] SMP PTI
[ 103.623424] CPU: 10 PID: 1046 Comm: cat Not tainted 5.0.0-rc3-00130-gd73aba1-dirty #96
[ 103.625321] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-2-g628b2e6-dirty-20190104_103505-linux 04/01/2014
[ 103.628284] RIP: 0010:process_fetch_insn+0x1ab/0x4b0
[ 103.629518] Code: 10 83 80 28 2e 00 00 01 31 d2 31 ff 48 8b 74 24 28 eb 0c 81 fa ff 0f 00 00 7f 1c 85 c0 75 18 66 66 90 0f ae e8 48 63
ca 89 f8 <8a> 0c 31 66 66 90 83 c2 01 84 c9 75 dc 89 54 24 34 89 44 24 28 48
[ 103.634032] RSP: 0018:ffff88845eb37ce0 EFLAGS: 00010246
[ 103.635312] RAX: 0000000000000000 RBX: ffff888456c4e5a8 RCX: 0000000000000000
[ 103.637057] RDX: 0000000000000000 RSI: 2e646c2f6374652f RDI: 0000000000000000
[ 103.638795] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[ 103.640556] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
[ 103.642297] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[ 103.644040] FS: 0000000000000000(0000) GS:ffff88846f000000(0000) knlGS:0000000000000000
[ 103.646019] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 103.647436] CR2: 00007ffc79758038 CR3: 0000000463360006 CR4: 0000000000020ee0
[ 103.649147] Call Trace:
[ 103.649781] ? sched_clock_cpu+0xc/0xa0
[ 103.650747] ? do_sys_open+0x5/0x220
[ 103.651635] kprobe_trace_func+0x303/0x380
[ 103.652645] ? do_sys_open+0x5/0x220
[ 103.653528] kprobe_dispatcher+0x45/0x50
[ 103.654682] ? do_sys_open+0x1/0x220
[ 103.655875] kprobe_ftrace_handler+0x90/0xf0
[ 103.657282] ftrace_ops_assist_func+0x54/0xf0
[ 103.658564] ? __call_rcu+0x1dc/0x280
[ 103.659482] 0xffffffffc00000bf
[ 103.660384] ? __ia32_sys_open+0x20/0x20
[ 103.661682] ? do_sys_open+0x1/0x220
[ 103.662863] do_sys_open+0x5/0x220
[ 103.663988] do_syscall_64+0x60/0x210
[ 103.665201] entry_SYSCALL_64_after_hwframe+0x49/0xbe
[ 103.666862] RIP: 0033:0x7fc22fadccdd
[ 103.668034] Code: 48 89 54 24 e0 41 83 e2 40 75 32 89 f0 25 00 00 41 00 3d 00 00 41 00 74 24 89 f2 b8 01 01 00 00 48 89 fe bf 9c ff ff
ff 0f 05 <48> 3d 00 f0 ff ff 77 33 f3 c3 66 0f 1f 84 00 00 00 00 00 48 8d 44
[ 103.674029] RSP: 002b:00007ffc7972c3a8 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
[ 103.676512] RAX: ffffffffffffffda RBX: 0000562f86147a21 RCX: 00007fc22fadccdd
[ 103.678853] RDX: 0000000000080000 RSI: 00007fc22fae1428 RDI: 00000000ffffff9c
[ 103.681151] RBP: ffffffffffffffff R08: 0000000000000000 R09: 0000000000000000
[ 103.683489] R10: 0000000000000000 R11: 0000000000000287 R12: 00007fc22fce90a8
[ 103.685774] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000
[ 103.688056] Modules linked in:
[ 103.689131] ---[ end trace 43792035c28984a1 ]---
This can be fixed by using probe_mem_read() instead, as it can handle faulting
kernel memory addresses, which kprobes can legitimately do.
Link: http://lkml.kernel.org/r/20190125151051.7381-1-changbin.du@gmail.com
Cc: stable@vger.kernel.org
Fixes: 9da3f2b7405 ("x86/fault: BUG() when uaccess helpers fault on kernel addresses")
Signed-off-by: Changbin Du <changbin.du@gmail.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
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Pull block fixes from Jens Axboe:
- Ensure we insert into the hctx dispatch list, if a request is marked
as DONTPREP (Jianchao)
- NVMe pull request, single missing unlock on error fix (Keith)
- MD pull request, single fix for a potentially data corrupting issue
(Nate)
- Floppy check_events regression fix (Yufen)
* tag 'for-linus-20190215' of git://git.kernel.dk/linux-block:
md/raid1: don't clear bitmap bits on interrupted recovery.
floppy: check_events callback should not return a negative number
nvme-pci: add missing unlock for reset error
blk-mq: insert rq with DONTPREP to hctx dispatch list when requeue
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git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
Pull device mapper fixes from Mike Snitzer:
- Fix bug in DM crypt's sizing of its block integrity tag space,
resulting in less memory use when DM crypt layers on DM integrity.
- Fix a long-standing DM thinp crash consistency bug that was due to
improper handling of FUA. This issue is specific to writes that fill
an entire thinp block which needs to be allocated.
* tag 'for-5.0/dm-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
dm thin: fix bug where bio that overwrites thin block ignores FUA
dm crypt: don't overallocate the integrity tag space
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git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc
Pull MMC fixes from Ulf Hansson:
"A couple of MMC fixes intended for v5.0-rc7.
MMC core:
- Fix deadlock bug for block I/O requests
MMC host:
- sunxi: Disable broken HS-DDR mode for H5 by default
- sunxi: Avoid unsupported speed modes declared via DT
- meson-gx: Restore interrupt name"
* tag 'mmc-v5.0-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
mmc: meson-gx: fix interrupt name
mmc: block: handle complete_work on separate workqueue
mmc: sunxi: Filter out unsupported modes declared in the device tree
mmc: sunxi: Disable HS-DDR mode for H5 eMMC controller by default
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Adjust the cq/qp mask based on the number of bar2 pages in a host page.
For user-mode rdma, the granularity of the BAR2 memory mapped to a user
rdma process during queue allocation must be based on the host page
size. The lld attributes udb_density and ucq_density are used to figure
out how many sge contexts are in a bar2 page. So the rdev->qpmask and
rdev->cqmask in iw_cxgb4 need to now be adjusted based on how many sge
bar2 pages are in a host page.
Otherwise the device fails to work on non 4k page size systems.
Fixes: 2391b0030e24 ("cxgb4: Remove SGE_HOST_PAGE_SIZE dependency on page size")
Signed-off-by: Raju Rangoju <rajur@chelsio.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
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Export the sge_host_page_size field to ULDs via cxgb4_lld_info, so that
iw_cxgb4 can make use of this in calculating the correct qp/cq mask.
Fixes: 2391b0030e24 ("cxgb4: Remove SGE_HOST_PAGE_SIZE dependency on page size")
Signed-off-by: Raju Rangoju <rajur@chelsio.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
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Pull drm fixes from Dave Airlie:
"Usual pull request, little larger than I'd like but nothing too
strange in it. Willy found an bug in the lease ioctl calculations, but
it's a drm master only ioctl which makes it harder to mess with.
i915:
- combo phy programming fix
- opregion version check fix for VBT RVDA lookup
- gem mmap ioctl race fix
- fbdev hpd during suspend fix
- array size bounds check fix in pmu
amdgpu:
- Vega20 psp fix
- Add vrr range to debugfs for freesync debugging
sched:
- Scheduler race fix
vkms:
- license header fixups
imx:
- Fix CSI register offsets for i.MX51 and i.MX53.
- Fix delayed page flip completion events on i.MX6QP due to
unexpected behaviour of the PRE when issuing NOP buffer updates to
the same buffer address.
- Stop throwing errors for plane updates on disabled CRTCs when a
userspace process is killed while a plane update is pending.
- Add missing of_node_put cleanup in imx_ldb_bind"
* tag 'drm-fixes-2019-02-15-1' of git://anongit.freedesktop.org/drm/drm:
drm: Use array_size() when creating lease
drm/amdgpu/psp11: TA firmware is optional (v3)
drm/i915/opregion: rvda is relative from opregion base in opregion 2.1+
drm/i915/opregion: fix version check
drm/i915: Prevent a race during I915_GEM_MMAP ioctl with WC set
drm/i915: Block fbdev HPD processing during suspend
drm/i915/pmu: Fix enable count array size and bounds checking
drm/i915/cnl: Fix CNL macros for Voltage Swing programming
drm/i915/icl: combo port vswing programming changes per BSPEC
drm/vkms: Fix license inconsistent
drm/amd/display: Expose connector VRR range via debugfs
drm/sched: Always trace the dependencies we wait on, to fix a race.
gpu: ipu-v3: pre: don't trigger update if buffer address doesn't change
gpu: ipu-v3: Fix CSI offsets for imx53
drm/imx: imx-ldb: add missing of_node_puts
gpu: ipu-v3: Fix i.MX51 CSI control registers offset
drm/imx: ignore plane updates on disabled crtcs
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Carried over from radeon, but no longer used.
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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Given a master fd we can then override the priority of the context
in another fd.
Using these overrides was recommended by Christian instead of trying
to submit from a master fd, and I am adding a way to override a
single context instead of the entire process so we can only upgrade
a single Vulkan queue and not effectively the entire process.
Reused the flags field as it was checked to be 0 anyways, so nothing
used it. This is source-incompatible (due to the name change), but
ABI compatible.
Signed-off-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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Otherwise we interpret the file private data as drm & amdgpu data
while it might not be, possibly allowing one to get memory corruption.
Signed-off-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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I don't see another way to figure out if a ring is initialized if
the hardware block might not be initialized.
Entities have been fixed up to handle num_rqs = 0.
Signed-off-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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Some blocks in amdgpu can have 0 rqs.
Job creation already fails with -ENOENT when entity->rq is NULL,
so jobs cannot be pushed. Without a rq there is no scheduler to
pop jobs, and rq selection already does the right thing with a
list of length 0.
So the operations we need to fix are:
- Creation, do not set rq to rq_list[0] if the list can have length 0.
- Do not flush any jobs when there is no rq.
- On entity destruction handle the rq = NULL case.
- on set_priority, do not try to change the rq if it is NULL.
Signed-off-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto fix from Herbert Xu:
"This fixes a crash on resume in the ccree driver"
* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: ccree - fix resume race condition on init
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Pull networking fixes from David Miller:
1) Fix MAC address setting in mac80211 pmsr code, from Johannes Berg.
2) Probe SFP modules after being attached, from Russell King.
3) Byte ordering bug in SMC rx_curs_confirmed code, from Ursula Braun.
4) Revert some r8169 changes that are causing regressions, from Heiner
Kallweit.
5) Fix spurious connection timeouts in netfilter nat code, from Florian
Westphal.
6) SKB leak in tipc, from Hoang Le.
7) Short packet checkum issue in mlx4, similar to a previous mlx5
change, from Saeed Mahameed. The issue is that whilst padding bytes
are usually zero, it is not guarateed and the hardware doesn't take
the padding bytes into consideration when generating the checksum.
8) Fix various races in cls_tcindex, from Cong Wang.
9) Need to set stream ext to NULL before freeing in SCTP code, from Xin
Long.
10) Fix locking in phy_is_started, from Heiner Kallweit.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (54 commits)
net: ethernet: freescale: set FEC ethtool regs version
net: hns: Fix object reference leaks in hns_dsaf_roce_reset()
mm: page_alloc: fix ref bias in page_frag_alloc() for 1-byte allocs
net: phy: fix potential race in the phylib state machine
net: phy: don't use locking in phy_is_started
selftests: fix timestamping Makefile
net: dsa: bcm_sf2: potential array overflow in bcm_sf2_sw_suspend()
net: fix possible overflow in __sk_mem_raise_allocated()
dsa: mv88e6xxx: Ensure all pending interrupts are handled prior to exit
net: phy: fix interrupt handling in non-started states
sctp: set stream ext to NULL after freeing it in sctp_stream_outq_migrate
sctp: call gso_reset_checksum when computing checksum in sctp_gso_segment
net/mlx5e: XDP, fix redirect resources availability check
net/mlx5: Fix a compilation warning in events.c
net/mlx5: No command allowed when command interface is not ready
net/mlx5e: Fix NULL pointer derefernce in set channels error flow
netfilter: nft_compat: use-after-free when deleting targets
team: avoid complex list operations in team_nl_cmd_options_set()
net_sched: fix two more memory leaks in cls_tcindex
net_sched: fix a memory leak in cls_tcindex
...
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git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
Pull signal fix from Eric Biederman:
"Just a single patch that restores PTRACE_EVENT_EXIT functionality that
was accidentally broken by last weeks fixes"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
signal: Restore the stop PTRACE_EVENT_EXIT
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Flush after rule deletion bogusly hits -ENOENT. Skip rules that have
been already from nft_delrule_by_chain() which is always called from the
flush path.
Fixes: cf9dc09d0949 ("netfilter: nf_tables: fix missing rules flushing per table")
Reported-by: Phil Sutter <phil@nwl.cc>
Acked-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Calls into UV firmware must be protected against concurrency, expose the
efi_runtime_lock to the UV platform, and use it to serialise UV BIOS
calls.
Signed-off-by: Hedi Berriche <hedi.berriche@hpe.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Russ Anderson <rja@hpe.com>
Reviewed-by: Dimitri Sivanich <sivanich@hpe.com>
Reviewed-by: Mike Travis <mike.travis@hpe.com>
Cc: Andy Shevchenko <andy@infradead.org>
Cc: Bhupesh Sharma <bhsharma@redhat.com>
Cc: Darren Hart <dvhart@infradead.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: linux-efi <linux-efi@vger.kernel.org>
Cc: platform-driver-x86@vger.kernel.org
Cc: stable@vger.kernel.org # v4.9+
Cc: Steve Wahl <steve.wahl@hpe.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: x86-ml <x86@kernel.org>
Link: https://lkml.kernel.org/r/20190213193413.25560-5-hedi.berriche@hpe.com
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git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux into arm/fixes
i.MX fixes for 5.0, 3rd round:
It contains a fix for i.MX8MQ EVK board device tree, which makes the
broken eMMC support work as expected.
* tag 'imx-fixes-5.0-3' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux:
arm64: dts: imx8mq: Fix boot from eMMC
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git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip into arm/fixes
Fix for new dtc graph warnings and a regulator fix for rock64.
* tag 'v5.0-rockchip-dts64fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip:
arm64: dts: rockchip: enable usb-host regulators at boot on rk3328-rock64
arm64: dts: rockchip: fix graph_port warning on rk3399 bob kevin and excavator
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git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip into arm/fixes
Drop one non-existent component from powerdomain list.
* tag 'v5.0-rockchip-dts32fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip:
ARM: dts: rockchip: remove qos_cif1 from rk3188 power-domain
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git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into fixes
SoC fixes for omaps for v5.0-rc cycle
This series contains two SoC regression fixes and one uninitialized
variable fix:
- Fix inverted nirq pin handling for omap5 that started producing
warnings with earlier GIC direction checks and took a while to
understand and confirm. Basically there are two sys_nirq pins
that are bypassing peripheral modules and inverted automatically
by the SoC and need to be handled with a custom irq_set_type()
- Recent ti-sysc changes caused a regression to the pwm-omap-dmtimer
code where the device tree handling code for timer source clock
gets confused. It looks like we can remove that code eventually,
but for now we just drop a bogus pm_runtime_irq_safe() for the
timers with the related quirks caused by pm_runtime_irq_safe(),
and have the standard assigned-clocks and assigned-clock-parents
deal with setting the source clock
- Fix potentially uninitialized value for display init code if
regmap_read() fails
* tag 'omap-for-v5.0/fixes-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
ARM: OMAP2+: Variable "reg" in function omap4_dsi_mux_pads() could be uninitialized
ARM: dts: Configure clock parent for pwm vibra
bus: ti-sysc: Fix timer handling with drop pm_runtime_irq_safe()
ARM: OMAP5+: Fix inverted nirq pin interrupts with irq_set_type
clocksource: timer-ti-dm: Fix pwm dmtimer usage of fck reparenting
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The starting of AP interface can fail due to invalid
beacon interval, which does not match the minimum gcd
requirement set by the wifi driver. In such case, the
beacon interval of that interface gets updated with
that invalid beacon interval.
The next time that interface is brought up in AP mode,
an interface combination check is performed and the
beacon interval is taken from the previously set value.
In a case where an invalid beacon interval, i.e. a beacon
interval value which does not satisfy the minimum gcd criteria
set by the driver, is set, all the subsequent trials to
bring that interface in AP mode will fail, even if the
subsequent trials have a valid beacon interval.
To avoid this, in case of a failure in bringing up an
interface in AP mode due to interface combination error,
the interface beacon interval which is stored in bss
conf, needs to be restored with the last working value
of beacon interval.
Tested on ath10k using WCN3990.
Cc: stable@vger.kernel.org
Fixes: 0c317a02ca98 ("cfg80211: support virtual interfaces with different beacon intervals")
Signed-off-by: Rakesh Pillai <pillair@codeaurora.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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When rhashtable insertion fails the mesh table code doesn't free
the now-orphan mesh path object. This patch fixes that.
Cc: stable@vger.kernel.org
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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The mesh table code walks over hash tables for two purposes. First of
all it's used as part of a netlink dump process, but it is also used
for looking up entries to delete using criteria other than the hash
key.
The second purpose is directly contrary to the design specification
of rhashtable walks. It is only meant for use by netlink dumps.
This is because rhashtable is resizable and you cannot obtain a
stable walk over it during a resize process.
In fact mesh's use of rhashtable for dumping is bogus too. Rather
than using rhashtable walk's iterator to keep track of the current
position, it always converts the current position to an integer
which defeats the purpose of the iterator.
Therefore this patch converts all uses of rhashtable walk into a
simple linked list.
This patch also adds a new spin lock to protect the hash table
insertion/removal as well as the walk list modifications. In fact
the previous code was buggy as the removals can race with each
other, potentially resulting in a double-free.
Cc: stable@vger.kernel.org
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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The driver's interrupt handler checks whether a message is currently
being handled with the curr_msg pointer. When it is NULL, the interrupt
is considered to be unexpected. Similarly, the i2c_start_transfer
routine checks for the remaining number of messages to handle in
num_msgs.
However, these values are never cleared and always keep the message and
number relevant to the latest transfer (which might be done already and
the underlying message memory might have been freed).
When an unexpected interrupt hits with the DONE bit set, the isr will
then try to access the flags field of the curr_msg structure, leading
to a fatal page fault.
The msg_buf and msg_buf_remaining fields are also never cleared at the
end of the transfer, which can lead to similar pitfalls.
Fix these issues by introducing a cleanup function and always calling
it after a transfer is finished.
Fixes: e2474541032d ("i2c: bcm2835: Fix hang for writing messages larger than 16 bytes")
Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Acked-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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In case the hold bit is not needed we are carrying the old values.
Fix the same by resetting the bit when not needed.
Fixes the sporadic i2c bus lockups on National Instruments
Zynq-based devices.
Fixes: df8eb5691c48 ("i2c: Add driver for Cadence I2C controller")
Reported-by: Kyle Roeschley <kyle.roeschley@ni.com>
Acked-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
Tested-by: Kyle Roeschley <kyle.roeschley@ni.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Passing an object_count of sufficient size will make
object_count * 4 wrap around to be very small, then a later function
will happily iterate off the end of the object_ids array. Using
array_size() will saturate at SIZE_MAX, the kmalloc() will fail and
we'll return an -ENOMEM to the norty userspace.
Fixes: 62884cd386b8 ("drm: Add four ioctls for managing drm mode object leases [v7]")
Signed-off-by: Matthew Wilcox <willy@infradead.org>
Acked-by: Kees Cook <keescook@chromium.org>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: <stable@vger.kernel.org> # v4.15+
Signed-off-by: Dave Airlie <airlied@redhat.com>
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into drm-fixes
amdgpu:
- Vega20 psp fix
- Add vrr range to debugfs for freesync debugging
sched:
- Scheduler race fix
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexdeucher@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190213202958.3336-1-alexander.deucher@amd.com
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git://anongit.freedesktop.org/drm/drm-intel into drm-fixes
drm/i915 fixes for v5.0-rc7:
- combo phy programming fix
- opregion version check fix for VBT RVDA lookup
- gem mmap ioctl race fix
- fbdev hpd during suspend fix
- array size bounds check fix in pmu
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/877ee3504b.fsf@intel.com
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git://anongit.freedesktop.org/drm/drm-misc into drm-fixes
drm-misc-fixes for v5.0:
- Fix license inconsistency in vkms.
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/812e2f53-d72a-8fba-6c8c-fde8f44cf141@linux.intel.com
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When provisioning a new data block for a virtual block, either because
the block was previously unallocated or because we are breaking sharing,
if the whole block of data is being overwritten the bio that triggered
the provisioning is issued immediately, skipping copying or zeroing of
the data block.
When this bio completes the new mapping is inserted in to the pool's
metadata by process_prepared_mapping(), where the bio completion is
signaled to the upper layers.
This completion is signaled without first committing the metadata. If
the bio in question has the REQ_FUA flag set and the system crashes
right after its completion and before the next metadata commit, then the
write is lost despite the REQ_FUA flag requiring that I/O completion for
this request must only be signaled after the data has been committed to
non-volatile storage.
Fix this by deferring the completion of overwrite bios, with the REQ_FUA
flag set, until after the metadata has been committed.
Cc: stable@vger.kernel.org
Signed-off-by: Nikos Tsironis <ntsironis@arrikto.com>
Acked-by: Joe Thornber <ejt@redhat.com>
Acked-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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We've moved the tree to a shared gitlab tree, so that Sean can help out
with maintainer duties.
Cc: Sean Paul <seanpaul@chromium.org>
Acked-by: Sean Paul <sean@poorly.run>
Signed-off-by: Rob Clark <robdclark@gmail.com>
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This reverts commit 8099b047ecc431518b9bb6bdbba3549bbecdc343.
It turns out that people do actually depend on the shebang string being
truncated, and on the fact that an interpreter (like perl) will often
just re-interpret it entirely to get the full argument list.
Reported-by: Samuel Dionne-Riel <samuel@dionne-riel.com>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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This reverts commit 2a5f14f279f59143139bcd1606903f2f80a34241.
This patch causes xfstests generic/311 to fail. Reverting this for
now until we have a proper fix.
Signed-off-by: Abhi Das <adas@redhat.com>
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Currently the ethtool_regs version is set to 0 for FEC devices.
Use this field to store the register dump version exposed by the
kernel. The choosen version 2 corresponds to the kernel compile test:
#if defined(CONFIG_M523x) || defined(CONFIG_M527x)
|| defined(CONFIG_M528x) || defined(CONFIG_M520x)
|| defined(CONFIG_M532x) || defined(CONFIG_ARM)
|| defined(CONFIG_ARM64) || defined(CONFIG_COMPILE_TEST)
and version 1 corresponds to the opposite. Binaries of ethtool unaware
of this version will dump the whole set as usual.
Signed-off-by: Vivien Didelot <vivien.didelot@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This reverts commit d6ebf5088f09472c1136cd506bdc27034a6763f8.
I forgot that the kernel's default lease period should never be
decreased!
After a kernel upgrade, the kernel has no way of knowing on its own what
the previous lease time was. Unless userspace tells it otherwise, it
will assume the previous lease period was the same.
So if we decrease this value in a kernel upgrade, we end up enforcing a
grace period that's too short, and clients will fail to reclaim state in
time. Symptoms may include EIO and log messages like "NFS:
nfs4_reclaim_open_state: Lock reclaim failed!"
There was no real justification for the lease period decrease anyway.
Reported-by: Donald Buczek <buczek@molgen.mpg.de>
Fixes: d6ebf5088f09 "nfsd4: return default lease period"
Cc: stable@vger.kernel.org
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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The of_find_device_by_node() takes a reference to the underlying device
structure, we should release that reference.
Signed-off-by: Huang Zijiang <huang.zijiang@zte.com.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The basic idea behind ->pagecnt_bias is: If we pre-allocate the maximum
number of references that we might need to create in the fastpath later,
the bump-allocation fastpath only has to modify the non-atomic bias value
that tracks the number of extra references we hold instead of the atomic
refcount. The maximum number of allocations we can serve (under the
assumption that no allocation is made with size 0) is nc->size, so that's
the bias used.
However, even when all memory in the allocation has been given away, a
reference to the page is still held; and in the `offset < 0` slowpath, the
page may be reused if everyone else has dropped their references.
This means that the necessary number of references is actually
`nc->size+1`.
Luckily, from a quick grep, it looks like the only path that can call
page_frag_alloc(fragsz=1) is TAP with the IFF_NAPI_FRAGS flag, which
requires CAP_NET_ADMIN in the init namespace and is only intended to be
used for kernel testing and fuzzing.
To test for this issue, put a `WARN_ON(page_ref_count(page) == 0)` in the
`offset < 0` path, below the virt_to_page() call, and then repeatedly call
writev() on a TAP device with IFF_TAP|IFF_NO_PI|IFF_NAPI_FRAGS|IFF_NAPI,
with a vector consisting of 15 elements containing 1 byte each.
Signed-off-by: Jann Horn <jannh@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Heiner Kallweit says:
====================
net: phy: fix locking issue
Russell pointed out that the locking used in phy_is_started() isn't
needed and misleading. This locking also contributes to a race fixed
with patch 2.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Russell reported the following race in the phylib state machine
(quoting from his mail):
if (phy_polling_mode(phydev) && phy_is_started(phydev))
phy_queue_state_machine(phydev, PHY_STATE_TIME);
state = PHY_UP
thread 0 thread 1
phy_disconnect()
+-phy_is_started()
phy_is_started() |
`-phy_stop()
+-phydev->state = PHY_HALTED
`-phy_stop_machine()
`-cancel_delayed_work_sync()
phy_queue_state_machine()
`-mod_delayed_work()
At this point, the phydev->state_queue() has been added back onto the
system workqueue despite phy_stop_machine() having been called and
cancel_delayed_work_sync() called on it.
Fix this by protecting the complete operation in thread 0.
Fixes: 2b3e88ea6528 ("net: phy: improve phy state checking")
Reported-by: Russell King - ARM Linux admin <linux@armlinux.org.uk>
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Russell suggested to remove the locking from phy_is_started() because
the read is atomic anyway and actually the locking may be more
misleading.
Fixes: 2b3e88ea6528 ("net: phy: improve phy state checking")
Suggested-by: Russell King - ARM Linux admin <linux@armlinux.org.uk>
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The clean target in the makefile conflicts with the generic
kselftests lib.mk, and fails to properly remove the compiled
test programs.
Remove the redundant rule, the TEST_GEN_FILES will be already
removed by the CLEAN macro in lib.mk.
Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
Acked-by: Shuah Khan <shuah@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Commit ca83b4a7f2d068da79a0 ("x86/KVM/VMX: Add find_msr() helper function")
introduces the helper function find_msr(), which returns -ENOENT when
not find the msr in vmx->msr_autoload.guest/host. Correct checking contion
of no more available entry in vmx->msr_autoload.
Fixes: ca83b4a7f2d0 ("x86/KVM/VMX: Add find_msr() helper function")
Cc: stable@vger.kernel.org
Signed-off-by: Xiaoyao Li <xiaoyao.li@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Some Posted-Interrupts from passthrough devices may be lost or
overwritten when the vCPU is in runnable state.
The SN (Suppress Notification) of PID (Posted Interrupt Descriptor) will
be set when the vCPU is preempted (vCPU in KVM_MP_STATE_RUNNABLE state but
not running on physical CPU). If a posted interrupt comes at this time,
the irq remapping facility will set the bit of PIR (Posted Interrupt
Requests) but not ON (Outstanding Notification). Then, the interrupt
will not be seen by KVM, which always expects PID.ON=1 if PID.PIR=1
as documented in the Intel processor SDM but not in the VT-d specification.
To fix this, restore the invariant after PID.SN is cleared.
Signed-off-by: Luwei Kang <luwei.kang@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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The prepare_fb call always happens on new_plane_state.
The drm_atomic_helper_cleanup_planes checks to see if
plane state pointer has changed when deciding to call cleanup_fb on
either the new_plane_state or the old_plane_state.
For a non-async atomic commit the state pointer is swapped, so this
helper calls prepare_fb on the new_plane_state and cleanup_fb on the
old_plane_state. This makes sense, since we want to prepare the
framebuffer we are going to use and cleanup the the framebuffer we are
no longer using.
For the async atomic update helpers this differs. The async atomic
update helpers perform in-place updates on the existing state. They call
drm_atomic_helper_cleanup_planes but the state pointer is not swapped.
This means that prepare_fb is called on the new_plane_state and
cleanup_fb is called on the new_plane_state (not the old).
In the case where old_plane_state->fb == new_plane_state->fb then
there should be no behavioral difference between an async update
and a non-async commit. But there are issues that arise when
old_plane_state->fb != new_plane_state->fb.
The first is that the new_plane_state->fb is immediately cleaned up
after it has been prepared, so we're using a fb that we shouldn't
be.
The second occurs during a sequence of async atomic updates and
non-async regular atomic commits. Suppose there are two framebuffers
being interleaved in a double-buffering scenario, fb1 and fb2:
- Async update, oldfb = NULL, newfb = fb1, prepare fb1, cleanup fb1
- Async update, oldfb = fb1, newfb = fb2, prepare fb2, cleanup fb2
- Non-async commit, oldfb = fb2, newfb = fb1, prepare fb1, cleanup fb2
We call cleanup_fb on fb2 twice in this example scenario, and any
further use will result in use-after-free.
The simple fix to this problem is to block framebuffer changes
in the drm_atomic_helper_async_check function for now.
v2: Move check by itself, add a FIXME (Daniel)
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Harry Wentland <harry.wentland@amd.com>
Cc: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Cc: <stable@vger.kernel.org> # v4.14+
Fixes: fef9df8b5945 ("drm/atomic: initial support for asynchronous plane update")
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Acked-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Reviewed-by: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Link: https://patchwork.freedesktop.org/patch/275364/
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git://anongit.freedesktop.org/drm/drm-misc into drm-next
drm-misc-next for 5.1:
UAPI Changes:
- New fourcc for P010 and P016 formats
Cross-subsystem Changes:
Core Changes:
- Removal of drm_calc_{h,v}scale_relaxed
- A few fixes for DP-MST
Driver Changes:
- More drmP.h cleanups
- A bunch of vkms fixes
- Conversion of the Cadence DSI bridge and Allwinner DSI driver to the
generic phy MIPI-DPHY API
- New panel: Innolux EE101IA-01D
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
From: Maxime Ripard <maxime.ripard@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190211095220.3oeodszr2dgxrwqq@flea
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Add the CPUID model number of Icelake (ICL) mobile processors to the
Intel family list. Icelake U/Y series uses model number 0x7E.
Signed-off-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@linux.intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: "David E. Box" <david.e.box@intel.com>
Cc: dvhart@infradead.org
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: platform-driver-x86@vger.kernel.org
Cc: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: x86-ml <x86@kernel.org>
Link: https://lkml.kernel.org/r/20190214115712.19642-2-rajneesh.bhardwaj@linux.intel.com
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Similarly to PXA3xx, pinctrl-single can't set pin direction on MMP2 either.
See also: commit 9dabfdd84bdfa ("gpio: pxa: disable pinctrl calls for
PXA3xx")
Cc: stable@vger.kernel.org
Fixes: a770d946371e ("gpio: pxa: add pin control gpio direction and request")
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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