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KCSAN reported the following data-race [1]
The fix will also prevent the compiler from optimizing out
the condition.
[1]
BUG: KCSAN: data-race in neigh_resolve_output / neigh_resolve_output
write to 0xffff8880a41dba78 of 8 bytes by interrupt on cpu 1:
neigh_event_send include/net/neighbour.h:443 [inline]
neigh_resolve_output+0x78/0x480 net/core/neighbour.c:1474
neigh_output include/net/neighbour.h:511 [inline]
ip_finish_output2+0x4af/0xe40 net/ipv4/ip_output.c:228
__ip_finish_output net/ipv4/ip_output.c:308 [inline]
__ip_finish_output+0x23a/0x490 net/ipv4/ip_output.c:290
ip_finish_output+0x41/0x160 net/ipv4/ip_output.c:318
NF_HOOK_COND include/linux/netfilter.h:294 [inline]
ip_output+0xdf/0x210 net/ipv4/ip_output.c:432
dst_output include/net/dst.h:436 [inline]
ip_local_out+0x74/0x90 net/ipv4/ip_output.c:125
__ip_queue_xmit+0x3a8/0xa40 net/ipv4/ip_output.c:532
ip_queue_xmit+0x45/0x60 include/net/ip.h:237
__tcp_transmit_skb+0xe81/0x1d60 net/ipv4/tcp_output.c:1169
tcp_transmit_skb net/ipv4/tcp_output.c:1185 [inline]
__tcp_retransmit_skb+0x4bd/0x15f0 net/ipv4/tcp_output.c:2976
tcp_retransmit_skb+0x36/0x1a0 net/ipv4/tcp_output.c:2999
tcp_retransmit_timer+0x719/0x16d0 net/ipv4/tcp_timer.c:515
tcp_write_timer_handler+0x42d/0x510 net/ipv4/tcp_timer.c:598
tcp_write_timer+0xd1/0xf0 net/ipv4/tcp_timer.c:618
read to 0xffff8880a41dba78 of 8 bytes by interrupt on cpu 0:
neigh_event_send include/net/neighbour.h:442 [inline]
neigh_resolve_output+0x57/0x480 net/core/neighbour.c:1474
neigh_output include/net/neighbour.h:511 [inline]
ip_finish_output2+0x4af/0xe40 net/ipv4/ip_output.c:228
__ip_finish_output net/ipv4/ip_output.c:308 [inline]
__ip_finish_output+0x23a/0x490 net/ipv4/ip_output.c:290
ip_finish_output+0x41/0x160 net/ipv4/ip_output.c:318
NF_HOOK_COND include/linux/netfilter.h:294 [inline]
ip_output+0xdf/0x210 net/ipv4/ip_output.c:432
dst_output include/net/dst.h:436 [inline]
ip_local_out+0x74/0x90 net/ipv4/ip_output.c:125
__ip_queue_xmit+0x3a8/0xa40 net/ipv4/ip_output.c:532
ip_queue_xmit+0x45/0x60 include/net/ip.h:237
__tcp_transmit_skb+0xe81/0x1d60 net/ipv4/tcp_output.c:1169
tcp_transmit_skb net/ipv4/tcp_output.c:1185 [inline]
__tcp_retransmit_skb+0x4bd/0x15f0 net/ipv4/tcp_output.c:2976
tcp_retransmit_skb+0x36/0x1a0 net/ipv4/tcp_output.c:2999
tcp_retransmit_timer+0x719/0x16d0 net/ipv4/tcp_timer.c:515
tcp_write_timer_handler+0x42d/0x510 net/ipv4/tcp_timer.c:598
Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.0-rc3+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm
Pull pwm fix from Thierry Reding:
"One more fix to keep a reference to the driver's module as long as
there are users of the PWM exposed by the driver"
* tag 'pwm/for-5.4-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm:
pwm: bcm-iproc: Prevent unloading the driver module while in use
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Commit 67692435c411 ("sched: Rework pick_next_task() slow-path")
inadvertly introduced a race because it changed a previously
unexplored dependency between dropping the rq->lock and
sched_class::put_prev_task().
The comments about dropping rq->lock, in for example
newidle_balance(), only mentions the task being current and ->on_cpu
being set. But when we look at the 'change' pattern (in for example
sched_setnuma()):
queued = task_on_rq_queued(p); /* p->on_rq == TASK_ON_RQ_QUEUED */
running = task_current(rq, p); /* rq->curr == p */
if (queued)
dequeue_task(...);
if (running)
put_prev_task(...);
/* change task properties */
if (queued)
enqueue_task(...);
if (running)
set_next_task(...);
It becomes obvious that if we do this after put_prev_task() has
already been called on @p, things go sideways. This is exactly what
the commit in question allows to happen when it does:
prev->sched_class->put_prev_task(rq, prev, rf);
if (!rq->nr_running)
newidle_balance(rq, rf);
The newidle_balance() call will drop rq->lock after we've called
put_prev_task() and that allows the above 'change' pattern to
interleave and mess up the state.
Furthermore, it turns out we lost the RT-pull when we put the last DL
task.
Fix both problems by extracting the balancing from put_prev_task() and
doing a multi-class balance() pass before put_prev_task().
Fixes: 67692435c411 ("sched: Rework pick_next_task() slow-path")
Reported-by: Quentin Perret <qperret@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Quentin Perret <qperret@google.com>
Tested-by: Valentin Schneider <valentin.schneider@arm.com>
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When cgroup is disabled the following compilation error was hit
kernel/sched/core.c: In function ‘uclamp_update_active_tasks’:
kernel/sched/core.c:1081:23: error: storage size of ‘it’ isn’t known
struct css_task_iter it;
^~
kernel/sched/core.c:1084:2: error: implicit declaration of function ‘css_task_iter_start’; did you mean ‘__sg_page_iter_start’? [-Werror=implicit-function-declaration]
css_task_iter_start(css, 0, &it);
^~~~~~~~~~~~~~~~~~~
__sg_page_iter_start
kernel/sched/core.c:1085:14: error: implicit declaration of function ‘css_task_iter_next’; did you mean ‘__sg_page_iter_next’? [-Werror=implicit-function-declaration]
while ((p = css_task_iter_next(&it))) {
^~~~~~~~~~~~~~~~~~
__sg_page_iter_next
kernel/sched/core.c:1091:2: error: implicit declaration of function ‘css_task_iter_end’; did you mean ‘get_task_cred’? [-Werror=implicit-function-declaration]
css_task_iter_end(&it);
^~~~~~~~~~~~~~~~~
get_task_cred
kernel/sched/core.c:1081:23: warning: unused variable ‘it’ [-Wunused-variable]
struct css_task_iter it;
^~
cc1: some warnings being treated as errors
make[2]: *** [kernel/sched/core.o] Error 1
Fix by protetion uclamp_update_active_tasks() with
CONFIG_UCLAMP_TASK_GROUP
Fixes: babbe170e053 ("sched/uclamp: Update CPU's refcount on TG's clamp changes")
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Qais Yousef <qais.yousef@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Vincent Guittot <vincent.guittot@linaro.org>
Cc: Patrick Bellasi <patrick.bellasi@matbug.net>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Dietmar Eggemann <dietmar.eggemann@arm.com>
Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Ben Segall <bsegall@google.com>
Link: https://lkml.kernel.org/r/20191105112212.596-1-qais.yousef@arm.com
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cgroup writeback tries to refresh the associated wb immediately if the
current wb is dead. This is to avoid keeping issuing IOs on the stale
wb after memcg - blkcg association has changed (ie. when blkcg got
disabled / enabled higher up in the hierarchy).
Unfortunately, the logic gets triggered spuriously on inodes which are
associated with dead cgroups. When the logic is triggered on dead
cgroups, the attempt fails only after doing quite a bit of work
allocating and initializing a new wb.
While c3aab9a0bd91 ("mm/filemap.c: don't initiate writeback if mapping
has no dirty pages") alleviated the issue significantly as it now only
triggers when the inode has dirty pages. However, the condition can
still be triggered before the inode is switched to a different cgroup
and the logic simply doesn't make sense.
Skip the immediate switching if the associated memcg is dying.
This is a simplified version of the following two patches:
* https://lore.kernel.org/linux-mm/20190513183053.GA73423@dennisz-mbp/
* http://lkml.kernel.org/r/156355839560.2063.5265687291430814589.stgit@buzz
Cc: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Fixes: e8a7abf5a5bd ("writeback: disassociate inodes from dying bdi_writebacks")
Acked-by: Dennis Zhou <dennis@kernel.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Pull ceph fixes from Ilya Dryomov:
"Some late-breaking dentry handling fixes from Al and Jeff, a patch to
further restrict copy_file_range() to avoid potential data corruption
from Luis and a fix for !CONFIG_CEPH_FSCACHE kernels.
Everything but the fscache fix is marked for stable"
* tag 'ceph-for-5.4-rc7' of git://github.com/ceph/ceph-client:
ceph: return -EINVAL if given fsc mount option on kernel w/o support
ceph: don't allow copy_file_range when stripe_count != 1
ceph: don't try to handle hashed dentries in non-O_CREAT atomic_open
ceph: add missing check in d_revalidate snapdir handling
ceph: fix RCU case handling in ceph_d_revalidate()
ceph: fix use-after-free in __ceph_remove_cap()
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The "42f5cda5eaf4" commit rightly set SOCK_DONE on peer shutdown,
but there is an issue if we receive the SHUTDOWN(RDWR) while the
virtio_transport_close_timeout() is scheduled.
In this case, when the timeout fires, the SOCK_DONE is already
set and the virtio_transport_close_timeout() will not call
virtio_transport_reset() and virtio_transport_do_close().
This causes that both sockets remain open and will never be released,
preventing the unloading of [virtio|vhost]_transport modules.
This patch fixes this issue, calling virtio_transport_reset() and
virtio_transport_do_close() when we receive the SHUTDOWN(RDWR)
and there is nothing left to read.
Fixes: 42f5cda5eaf4 ("vsock/virtio: set SOCK_DONE on peer shutdown")
Cc: Stephen Barber <smbarber@chromium.org>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211
Johannes Berg says:
====================
Three small fixes:
* we hit a failure path bug related to
ieee80211_txq_setup_flows()
* also use kvmalloc() to make that less likely
* fix a timing value shortly after boot (during
INITIAL_JIFFIES)
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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From gen2 PN is totally offloaded to hardware (also the space for the
IV isn't part of the skb). As you can see in mvm/mac80211.c:3545, the
MAC for cipher types CCMP/GCMP doesn't set
IEEE80211_KEY_FLAG_PUT_IV_SPACE for gen2 NICs.
This causes all the AMSDU data to be corrupted with cipher enabled.
Signed-off-by: Mordechay Goodstein <mordechay.goodstein@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
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Octeon's input ring-buffer entry has 14 bits-wide size field, so to account
for second possible VLAN header max_mtu must be further reduced.
Fixes: 109cc16526c6d ("ethernet/cavium: use core min/max MTU checking")
Signed-off-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux
Pull modules fix from Jessica Yu:
"Fix `make nsdeps` for modules composed of multiple source files.
Since $mod_source_files was not in quotes in the call to
generate_deps_for_ns(), not all the source files for a module were
being passed to spatch"
* tag 'modules-for-v5.4-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux:
scripts/nsdeps: make sure to pass all module source files to spatch
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'for-next/zone-dma', 'for-next/relax-icc_pmr_el1-sync', 'for-next/double-page-fault', 'for-next/misc', 'for-next/kselftest-arm64-signal' and 'for-next/kaslr-diagnostics' into for-next/core
* for-next/elf-hwcap-docs:
: Update the arm64 ELF HWCAP documentation
docs/arm64: cpu-feature-registers: Rewrite bitfields that don't follow [e, s]
docs/arm64: cpu-feature-registers: Documents missing visible fields
docs/arm64: elf_hwcaps: Document HWCAP_SB
docs/arm64: elf_hwcaps: sort the HWCAP{, 2} documentation by ascending value
* for-next/smccc-conduit-cleanup:
: SMC calling convention conduit clean-up
firmware: arm_sdei: use common SMCCC_CONDUIT_*
firmware/psci: use common SMCCC_CONDUIT_*
arm: spectre-v2: use arm_smccc_1_1_get_conduit()
arm64: errata: use arm_smccc_1_1_get_conduit()
arm/arm64: smccc/psci: add arm_smccc_1_1_get_conduit()
* for-next/zone-dma:
: Reintroduction of ZONE_DMA for Raspberry Pi 4 support
arm64: mm: reserve CMA and crashkernel in ZONE_DMA32
dma/direct: turn ARCH_ZONE_DMA_BITS into a variable
arm64: Make arm64_dma32_phys_limit static
arm64: mm: Fix unused variable warning in zone_sizes_init
mm: refresh ZONE_DMA and ZONE_DMA32 comments in 'enum zone_type'
arm64: use both ZONE_DMA and ZONE_DMA32
arm64: rename variables used to calculate ZONE_DMA32's size
arm64: mm: use arm64_dma_phys_limit instead of calling max_zone_dma_phys()
* for-next/relax-icc_pmr_el1-sync:
: Relax ICC_PMR_EL1 (GICv3) accesses when ICC_CTLR_EL1.PMHE is clear
arm64: Document ICC_CTLR_EL3.PMHE setting requirements
arm64: Relax ICC_PMR_EL1 accesses when ICC_CTLR_EL1.PMHE is clear
* for-next/double-page-fault:
: Avoid a double page fault in __copy_from_user_inatomic() if hw does not support auto Access Flag
mm: fix double page fault on arm64 if PTE_AF is cleared
x86/mm: implement arch_faults_on_old_pte() stub on x86
arm64: mm: implement arch_faults_on_old_pte() on arm64
arm64: cpufeature: introduce helper cpu_has_hw_af()
* for-next/misc:
: Various fixes and clean-ups
arm64: kpti: Add NVIDIA's Carmel core to the KPTI whitelist
arm64: mm: Remove MAX_USER_VA_BITS definition
arm64: mm: simplify the page end calculation in __create_pgd_mapping()
arm64: print additional fault message when executing non-exec memory
arm64: psci: Reduce the waiting time for cpu_psci_cpu_kill()
arm64: pgtable: Correct typo in comment
arm64: docs: cpu-feature-registers: Document ID_AA64PFR1_EL1
arm64: cpufeature: Fix typos in comment
arm64/mm: Poison initmem while freeing with free_reserved_area()
arm64: use generic free_initrd_mem()
arm64: simplify syscall wrapper ifdeffery
* for-next/kselftest-arm64-signal:
: arm64-specific kselftest support with signal-related test-cases
kselftest: arm64: fake_sigreturn_misaligned_sp
kselftest: arm64: fake_sigreturn_bad_size
kselftest: arm64: fake_sigreturn_duplicated_fpsimd
kselftest: arm64: fake_sigreturn_missing_fpsimd
kselftest: arm64: fake_sigreturn_bad_size_for_magic0
kselftest: arm64: fake_sigreturn_bad_magic
kselftest: arm64: add helper get_current_context
kselftest: arm64: extend test_init functionalities
kselftest: arm64: mangle_pstate_invalid_mode_el[123][ht]
kselftest: arm64: mangle_pstate_invalid_daif_bits
kselftest: arm64: mangle_pstate_invalid_compat_toggle and common utils
kselftest: arm64: extend toplevel skeleton Makefile
* for-next/kaslr-diagnostics:
: Provide diagnostics on boot for KASLR
arm64: kaslr: Check command line before looking for a seed
arm64: kaslr: Announce KASLR status on boot
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git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fix from Will Deacon:
"Fix pte_same() to avoid getting stuck on write fault.
This single arm64 fix is a revert of 747a70e60b72 ("arm64: Fix
copy-on-write referencing in HugeTLB"), not because that patch was
wrong, but because it was broken by aa57157be69f ("arm64: Ensure
VM_WRITE|VM_SHARED ptes are clean by default") which we merged in
-rc6.
We spotted the issue in Android (AOSP), where one of the JIT threads
gets stuck on a write fault during boot because the faulting pte is
marked as PTE_DIRTY | PTE_WRITE | PTE_RDONLY and the fault handler
decides that there's nothing to do thanks to pte_same() masking out
PTE_RDONLY.
Thanks to John Stultz for reporting this and testing this so quickly,
and to Steve Capper for confirming that the HugeTLB tests continue to
pass"
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: Do not mask out PTE_RDONLY in pte_same()
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The owner member of struct pwm_ops must be set to THIS_MODULE to
increase the reference count of the module such that the module cannot
be removed while its code is in use.
Fixes: daa5abc41c80 ("pwm: Add support for Broadcom iProc PWM controller")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
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Now that we print diagnostics at boot the reason why we do not initialise
KASLR matters. Currently we check for a seed before we check if the user
has explicitly disabled KASLR on the command line which will result in
misleading diagnostics so reverse the order of those checks. We still
parse the seed from the DT early so that if the user has both provided a
seed and disabled KASLR on the command line we still mask the seed on
the command line.
Signed-off-by: Mark Brown <broonie@kernel.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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Currently the KASLR code is silent at boot unless it forces on KPTI in
which case a message will be printed for that. This can lead to users
incorrectly believing their system has the feature enabled when it in
fact does not, and if they notice the problem the lack of any
diagnostics makes it harder to understand the problem. Add an initcall
which prints a message showing the status of KASLR during boot to make
the status clear.
This is particularly useful in cases where we don't have a seed. It
seems to be a relatively common error for system integrators and
administrators to enable KASLR in their configuration but not provide
the seed at runtime, often due to seed provisioning breaking at some
later point after it is initially enabled and verified.
Signed-off-by: Mark Brown <broonie@kernel.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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Pull XArray fixes from Matthew Wilcox:
"These all fix various bugs, some of which people have tripped over and
some of which have been caught by automatic tools"
* tag 'xarray-5.4' of git://git.infradead.org/users/willy/linux-dax:
idr: Fix idr_alloc_u32 on 32-bit systems
idr: Fix integer overflow in idr_for_each_entry
radix tree: Remove radix_tree_iter_find
idr: Fix idr_get_next_ul race with idr_remove
XArray: Fix xas_next() with a single entry at 0
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management fix from Rafael Wysocki:
"Fix an 'unchecked MSR access' warning in the intel_pstate cpufreq
driver (Srinivas Pandruvada)"
* tag 'pm-5.4-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
cpufreq: intel_pstate: Fix invalid EPB setting
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git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"It became a bit largish, but all small and good for 5.4:
- A regression fix of ALSA timer code bug that sneaked in by a recent
cleanup; never trust innocent-looking guys...
- Fix for compress API max size check signedness
- Fixes in HD-audio: CA0132 work stall, Intel Tigerlake HDMI
- A few fixes for SOF: memory leak, sanity-check and build fixes
- A collection of device-specific fixes: firewire, rockchip, ASoC
HDMI, rsnd, ASoC HDA, stm32, TI, kirkwood, msm, max98373"
* tag 'sound-5.4-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: timer: Fix incorrectly assigned timer instance
ASoC: SOF: topology: Fix bytes control size checks
ALSA: hda: hdmi - add Tigerlake support
ASoC: max98373: replace gpio_request with devm_gpio_request
ASoC: stm32: sai: add restriction on mmap support
ALSA: hda/ca0132 - Fix possible workqueue stall
ASoC: hdac_hda: fix race in device removal
ALSA: bebob: fix to detect configured source of sampling clock for Focusrite Saffire Pro i/o series
ASoC: rockchip: rockchip_max98090: Enable SHDN to fix headset detection
ASoC: ti: sdma-pcm: Add back the flags parameter for non standard dma names
ASoC: SOF: ipc: Fix memory leak in sof_set_get_large_ctrl_data
ASoC: SOF: Fix memory leak in sof_dfsentry_write
ASoC: SOF: Intel: hda-stream: fix the CONFIG_ prefix missing
ASoC: kirkwood: fix device remove ordering
ASoC: rsnd: dma: fix SSI9 4/5/6/7 busif dma address
ASoC: hdmi-codec: drop mutex locking again
ASoC: kirkwood: fix external clock probe defer
ASoC: compress: fix unsigned integer overflow check
ASoC: msm8916-wcd-analog: Fix RX1 selection in RDAC2 MUX
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Pull drm fixes from Dave Airlie:
"Weekly fixes for drm: amdgpu has a few but they are pretty scattered
fixes, the fbdev one is a build regression fix that we didn't want to
risk leaving out, otherwise a couple of i915, one radeon and a core
atomic fix.
core:
- add missing documentation for GEM shmem madvise helpers
- Fix for a state dereference in atomic self-refresh helpers
fbdev:
- One compilation fix for c2p fbdev helpers
amdgpu:
- Fix navi14 display issue root cause and revert workaround
- GPU reset scheduler interaction fix
- Fix fan boost on multi-GPU
- Gfx10 and sdma5 fixes for navi
- GFXOFF fix for renoir
- Add navi14 PCI ID
- GPUVM fix for arcturus
radeon:
- Port an SI power fix from amdgpu
i915:
- Fix HPD poll to avoid kworker consuming a lot of cpu cycles.
- Do not use TBT type for non Type-C ports"
* tag 'drm-fixes-2019-11-08' of git://anongit.freedesktop.org/drm/drm:
drm/radeon: fix si_enable_smc_cac() failed issue
drm/amdgpu/renoir: move gfxoff handling into gfx9 module
drm/amdgpu: add warning for GRBM 1-cycle delay issue in gfx9
drm/amdgpu: add dummy read by engines for some GCVM status registers in gfx10
drm/amdgpu: register gpu instance before fan boost feature enablment
drm/amd/swSMU: fix smu workload bit map error
drm/shmem: Add docbook comments for drm_gem_shmem_object madvise fields
drm/amdgpu: add navi14 PCI ID
Revert "drm/amd/display: setting the DIG_MODE to the correct value."
drm/amd/display: Add ENGINE_ID_DIGD condition check for Navi14
drm/amdgpu: dont schedule jobs while in reset
drm/amdgpu/arcturus: properly set BANK_SELECT and FRAGMENT_SIZE
drm/atomic: fix self-refresh helpers crtc state dereference
drm/i915/dp: Do not switch aux to TBT mode for non-TC ports
drm/i915: Avoid HPD poll detect triggering a new detect cycle
fbdev: c2p: Fix link failure on non-inlining
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git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux
Pull clk fixes from Stephen Boyd:
"Fixes for various clk driver issues that happened because of code we
merged this merge window.
The Amlogic driver was missing some flags causing rates to be rounded
improperly or clk_set_rate() to fail. The Samsung driver wasn't
freeing everything on error paths and improperly saving/restoring PLL
state across suspend/resume. The at91 driver was calling msleep() too
early when scheduling hadn't started, so we put in place a quick
solution until we can handle this sort of problem in the core
framework.
There were also problems with the Allwinner driver and operator
precedence being incorrect causing subtle bugs. Finally, the TI driver
was duplicating aliases and not delaying long enough leading to some
unexpected timeouts"
* tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
clk: ti: clkctrl: Fix failed to enable error with double udelay timeout
clk: ti: dra7-atl-clock: Remove ti_clk_add_alias call
clk: sunxi-ng: a80: fix the zero'ing of bits 16 and 18
clk: sunxi: Fix operator precedence in sunxi_divs_clk_setup
clk: ast2600: Fix enabling of clocks
clk: at91: avoid sleeping early
clk: imx8m: Use SYS_PLL1_800M as intermediate parent of CLK_ARM
clk: samsung: exynos5420: Preserve PLL configuration during suspend/resume
clk: samsung: exynos542x: Move G3D subsystem clocks to its sub-CMU
clk: samsung: exynos5433: Fix error paths
clk: at91: sam9x60: fix programmable clock
clk: meson: g12a: set CLK_MUX_ROUND_CLOSEST on the cpu clock muxes
clk: meson: g12a: fix cpu clock rate setting
clk: meson: gxbb: let sar_adc_clk_div set the parent clock rate
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The ghes registration and refcount is broken in several ways:
* ghes_edac_register() returns with success for a 2nd instance
even if a first instance's registration is still running. This is
not correct as the first instance may fail later. A subsequent
registration may not finish before the first. Parallel registrations
must be avoided.
* The refcount was increased even if a registration failed. This
leads to stale counters preventing the device from being released.
* The ghes refcount may not be decremented properly on unregistration.
Always decrement the refcount once ghes_edac_unregister() is called to
keep the refcount sane.
* The ghes_pvt pointer is handed to the irq handler before registration
finished.
* The mci structure could be freed while the irq handler is running.
Fix this by adding a mutex to ghes_edac_register(). This mutex
serializes instances to register and unregister. The refcount is only
increased if the registration succeeded. This makes sure the refcount is
in a consistent state after registering or unregistering a device.
Note: A spinlock cannot be used here as the code section may sleep.
The ghes_pvt is protected by ghes_lock now. This ensures the pointer is
not updated before registration was finished or while the irq handler is
running. It is unset before unregistering the device including necessary
(implicit) memory barriers making the changes visible to other CPUs.
Thus, the device can not be used anymore by an interrupt.
Also, rename ghes_init to ghes_refcount for better readability and
switch to refcount API.
A refcount is needed because there can be multiple GHES structures being
defined (see ACPI 6.3 specification, 18.3.2.7 Generic Hardware Error
Source, "Some platforms may describe multiple Generic Hardware Error
Source structures with different notification types, ...").
Another approach to use the mci's device refcount (get_device()) and
have a release function does not work here. A release function will be
called only for device_release() with the last put_device() call. The
device must be deleted *before* that with device_del(). This is only
possible by maintaining an own refcount.
[ bp: touchups. ]
Fixes: 0fe5f281f749 ("EDAC, ghes: Model a single, logical memory controller")
Fixes: 1e72e673b9d1 ("EDAC/ghes: Fix Use after free in ghes_edac remove path")
Co-developed-by: James Morse <james.morse@arm.com>
Signed-off-by: James Morse <james.morse@arm.com>
Co-developed-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Robert Richter <rrichter@marvell.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: "linux-edac@vger.kernel.org" <linux-edac@vger.kernel.org>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Tony Luck <tony.luck@intel.com>
Link: https://lkml.kernel.org/r/20191105200732.3053-1-rrichter@marvell.com
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Don't populate the const arrays on the stack but instead make them
static. Makes the object code smaller by 292 bytes.
Before:
text data bss dec hex filename
6988 3132 128 10248 2808 drivers/ata/pata_artop.o
After:
text data bss dec hex filename
6536 3292 128 9956 26e4 drivers/ata/pata_artop.o
(gcc version 9.2.1, amd64)
Acked-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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64K PAGE_SIZE is popular on ARM64 or other ARCHs, and 64K has been big
enough to break some devices probably, so change the logic to split bio
if the only bvec's length is > SZ_4K instead of PAGE_SIZE.
Fixes: fa5322872187 (block: avoid blk_bio_segment_split for small I/O operations)
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Some device may set segment boundary as PAGE_SIZE - 1. If the bvec
crosses pages, and meantime its length is <= PAGE_SIZE, we still need
to split the bvec into 2 segments.
Fixes this issue by still splitting bio if the single bvec crosses
pages.
Reported-by: kernel test robot <lkp@intel.com>
Fixes: fa5322872187 (block: avoid blk_bio_segment_split for small I/O operations)
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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There are two callers of this function and they both unlock the mutex so
this ends up being a double unlock.
Fixes: 44ed167da748 ("drbd: rcu_read_lock() and rcu_dereference() for tconn->net_conf")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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injection
Just like we do for WFE trapping, it can be useful to turn off
WFI trapping when the physical CPU is not oversubscribed (that
is, the vcpu is the only runnable process on this CPU) *and*
that we're using direct injection of interrupts.
The conditions are reevaluated on each vcpu_load(), ensuring that
we don't switch to this mode on a busy system.
On a GICv4 system, this has the effect of reducing the generation
of doorbell interrupts to zero when the right conditions are
met, which is a huge improvement over the current situation
(where the doorbells are screaming if the CPU ever hits a
blocking WFI).
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Zenghui Yu <yuzenghui@huawei.com>
Reviewed-by: Christoffer Dall <christoffer.dall@arm.com>
Link: https://lore.kernel.org/r/20191107160412.30301-3-maz@kernel.org
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In order to find out whether a vcpu is likely to be the target of
VLPIs (and to further optimize the way we deal with those), let's
track the number of VLPIs a vcpu can receive.
This gets implemented with an atomic variable that gets incremented
or decremented on map, unmap and move of a VLPI.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Zenghui Yu <yuzenghui@huawei.com>
Reviewed-by: Christoffer Dall <christoffer.dall@arm.com>
Link: https://lore.kernel.org/r/20191107160412.30301-2-maz@kernel.org
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Add a simple fake_sigreturn testcase which places a valid sigframe on a
non-16 bytes aligned SP. Expects a SIGSEGV on test PASS.
Reviewed-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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Add a simple fake_sigreturn testcase which builds a ucontext_t with a
badly sized header that causes a overrun in the __reserved area and
place it onto the stack. Expects a SIGSEGV on test PASS.
Reviewed-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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Add a simple fake_sigreturn testcase which builds a ucontext_t with
an anomalous additional fpsimd_context and place it onto the stack.
Expects a SIGSEGV on test PASS.
Reviewed-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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Add a simple fake_sigreturn testcase which builds a ucontext_t without
the required fpsimd_context and place it onto the stack.
Expects a SIGSEGV on test PASS.
Reviewed-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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Add a simple fake_sigreturn testcase which builds a ucontext_t with a
badly sized terminator record and place it onto the stack.
Expects a SIGSEGV on test PASS.
Reviewed-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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Add a simple fake_sigreturn testcase which builds a ucontext_t with a bad
magic header and place it onto the stack. Expects a SIGSEGV on test PASS.
Introduce a common utility assembly trampoline function to invoke a
sigreturn while placing the provided sigframe at wanted alignment and
also an helper to make space when needed inside the sigframe reserved
area.
Reviewed-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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Introduce a new common utility function get_current_context() which can be
used to grab a ucontext without the help of libc, and also to detect if
such ucontext has been successfully used by placing it on the stack as a
fake sigframe.
Reviewed-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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Extend signal testing framework to allow the definition of a custom per
test initialization function to be run at the end of the common test_init
after test setup phase has completed and before test-run routine.
This custom per-test initialization function also enables the test writer
to decide on its own when forcibly skip the test itself using standard KSFT
mechanism.
Reviewed-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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Add 6 simple mangle testcases that mess with the ucontext_t from within
the signal handler, trying to toggle PSTATE mode bits to trick the system
into switching to EL1/EL2/EL3 using both SP_EL0(t) and SP_ELx(h).
Expects SIGSEGV on test PASS.
Reviewed-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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Add a simple mangle testcase which messes with the ucontext_t from within
the signal handler, trying to set PSTATE DAIF bits to an invalid value
(masking everything). Expects SIGSEGV on test PASS.
Reviewed-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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Add some arm64/signal specific boilerplate and utility code to help
further testcases' development.
Introduce also one simple testcase mangle_pstate_invalid_compat_toggle
and some related helpers: it is a simple mangle testcase which messes
with the ucontext_t from within the signal handler, trying to toggle
PSTATE state bits to switch the system between 32bit/64bit execution
state. Expects SIGSEGV on test PASS.
Reviewed-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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Modify KSFT arm64 toplevel Makefile to maintain arm64 kselftests organized
by subsystem, keeping them into distinct subdirectories under arm64 custom
KSFT directory: tools/testing/selftests/arm64/
Add to such toplevel Makefile a mechanism to guess the effective location
of Kernel headers as installed by KSFT framework.
Fit existing arm64 tags kselftest into this new schema moving them into
their own subdirectory (arm64/tags).
Reviewed-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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- Support for additional PMU topologies on HiSilicon platforms
- Support for CCN-512 interconnect PMU
- Support for AXI ID filtering in the IMX8 DDR PMU
- Support for the CCPI2 uncore PMU in ThunderX2
- Driver cleanup to use devm_platform_ioremap_resource()
* for-next/perf:
drivers/perf: hisi: update the sccl_id/ccl_id for certain HiSilicon platform
perf/imx_ddr: Dump AXI ID filter info to userspace
docs/perf: Add AXI ID filter capabilities information
perf/imx_ddr: Add driver for DDR PMU in i.MX8MPlus
perf/imx_ddr: Add enhanced AXI ID filter support
bindings: perf: imx-ddr: Add new compatible string
docs/perf: Add explanation for DDR_CAP_AXI_ID_FILTER_ENHANCED quirk
arm64: perf: Simplify the ARMv8 PMUv3 event attributes
drivers/perf: Add CCPI2 PMU support in ThunderX2 UNCORE driver.
Documentation: perf: Update documentation for ThunderX2 PMU uncore driver
Documentation: Add documentation for CCN-512 DTS binding
perf: arm-ccn: Enable stats for CCN-512 interconnect
perf/smmuv3: use devm_platform_ioremap_resource() to simplify code
perf/arm-cci: use devm_platform_ioremap_resource() to simplify code
perf/arm-ccn: use devm_platform_ioremap_resource() to simplify code
perf: xgene: use devm_platform_ioremap_resource() to simplify code
perf: hisi: use devm_platform_ioremap_resource() to simplify code
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The max value of EPB can only be 0x0F. Attempting to set more than that
triggers an "unchecked MSR access error" warning which happens in
intel_pstate_hwp_force_min_perf() called via cpufreq stop_cpu().
However, it is not even necessary to touch the EPB from intel_pstate,
because it is restored on every CPU online by the intel_epb.c code,
so let that code do the right thing and drop the redundant (and
incorrect) EPB update from intel_pstate.
Fixes: af3b7379e2d70 ("cpufreq: intel_pstate: Force HWP min perf before offline")
Reported-by: Qian Cai <cai@lca.pw>
Cc: 5.2+ <stable@vger.kernel.org> # 5.2+
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
[ rjw: Changelog ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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In the first 5 minutes after boot (time of INITIAL_JIFFIES),
ieee80211_sta_last_active() returns zero if last_ack is zero. This
leads to "inactive time" showing jiffies_to_msecs(jiffies).
# iw wlan0 station get fc:ec:da:64:a6:dd
Station fc:ec:da:64:a6:dd (on wlan0)
inactive time: 4294894049 ms
.
.
connected time: 70 seconds
Fix by returning last_rx if last_ack == 0.
Signed-off-by: Ahmed Zaki <anzaki@gmail.com>
Link: https://lore.kernel.org/r/20191031121243.27694-1-anzaki@gmail.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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The FQ implementation used by mac80211 allocates memory using kmalloc(),
which can fail; and Johannes reported that this actually happens in
practice.
To avoid this, switch the allocation to kvmalloc() instead; this also
brings fq_impl in line with all the FQ qdiscs.
Fixes: 557fc4a09803 ("fq: add fair queuing framework")
Reported-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Link: https://lore.kernel.org/r/20191105155750.547379-1-toke@redhat.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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If ieee80211_txq_setup_flows() fails, we don't clean up LED
state properly, leading to crashes later on, fix that.
Fixes: dc8b274f0952 ("mac80211: Move up init of TXQs")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Acked-by: Toke Høiland-Jørgensen <toke@toke.dk>
Link: https://lore.kernel.org/r/20191105154110.1ccf7112ba5d.I0ba865792446d051867b33153be65ce6b063d98c@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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git://people.freedesktop.org/~agd5f/linux into drm-fixes
drm-fixes-5.4-2019-11-06:
amdgpu:
- Fix navi14 display issue root cause and revert workaround
- GPU reset scheduler interaction fix
- Fix fan boost on multi-GPU
- Gfx10 and sdma5 fixes for navi
- GFXOFF fix for renoir
- Add navi14 PCI ID
- GPUVM fix for arcturus
radeon:
- Port an SI power fix from amdgpu
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexdeucher@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191107032241.1021217-1-alexander.deucher@amd.com
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git://anongit.freedesktop.org/drm/drm-intel into drm-fixes
- Fix HPD poll to avoid kworker consuming a lot of cpu cycles.
- Do not use TBT type for non Type-C ports.
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191106213958.GA16525@intel.com
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The reference count of obj will be decremented twice if error occurs
in dma_buf_fd(). Additionally, attempting to read the reference count of
obj after dropping reference may lead to a use after free bug. Here, we
drop obj's reference until it is not used.
Fixes: e546e281d33d ("drm/i915/gvt: Dmabuf support for GVT-g")
Signed-off-by: Pan Bian <bianpan2016@163.com>
Reviewed-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
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git://anongit.freedesktop.org/drm/drm-misc into drm-fixes
- Some new documentation for GEM shmem madvise helpers
- Fix for a state dereference in atomic self-refresh helpers
- One compilation fix for c2p fbdev helpers
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Maxime Ripard <mripard@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20191107082215.GA34850@gilmour.lan
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