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Christian Brauner ac98b8c103 epoll: annotate racy check 
[ Upstream commit 6474353a5e ]

Epoll relies on a racy fastpath check during __fput() in
eventpoll_release() to avoid the hit of pointlessly acquiring a
semaphore. Annotate that race by using WRITE_ONCE() and READ_ONCE().

Link: https://lore.kernel.org/r/66edfb3c.050a0220.3195df.001a.GAE@google.com
Link: https://lore.kernel.org/r/20240925-fungieren-anbauen-79b334b00542@brauner
Reviewed-by: Jan Kara <jack@suse.cz>
Reported-by: syzbot+3b6b32dc50537a49bb4a@syzkaller.appspotmail.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2024-12-14 19:51:34 +01:00
..
acpi ACPI: CPPC: Make rmw_lock a raw_spin_lock 2024-11-08 16:25:53 +01:00
asm-generic vmlinux.lds.h: catch .bss..L* sections into BSS") 2024-08-19 05:44:54 +02:00
clocksource drivers: hv: Decouple Hyper-V clock/timer code from VMbus drivers 2021-07-19 09:24:28 +00:00
crypto crypto: af_alg - Disallow multiple in-flight AIO requests 2024-01-25 14:52:34 -08:00
drm drm/printer: Allow NULL data in devcoredump printer 2024-10-17 15:11:32 +02:00
dt-bindings dt-bindings: clock: qcom: Add GPLL9 support on gcc-sc8180x 2024-10-17 15:11:46 +02:00
keys KEYS: trusted: allow use of kernel RNG for key material 2023-10-19 23:05:33 +02:00
kunit kunit: fix kernel-doc warnings due to mismatched arg names 2021-10-06 17:54:07 -06:00
kvm KVM: arm64: vgic-v4: Make the doorbell request robust w.r.t preemption 2024-07-05 09:14:51 +02:00
linux epoll: annotate racy check 2024-12-14 19:51:34 +01:00
math-emu math-emu: Fix fall-through warning 2021-07-13 13:57:44 -05:00
media media: v4l2-core: v4l2-dv-timings: check cvt/gtf result 2024-12-14 19:51:17 +01:00
memory memory: renesas-rpc-if: Fix HF/OSPI data transfer in Manual Mode 2022-05-09 09:14:34 +02:00
misc ocxl: Update the Process Element Entry 2020-12-04 01:01:30 +11:00
net xfrm: store and rely on direction to construct offload flags 2024-12-14 19:50:54 +01:00
pcmcia pcmcia: Replace zero-length array with flexible-array 2020-05-18 10:28:31 +02:00
ras Revert "mm/memory-failure.c: fix race with changing page compound again" 2022-07-12 16:35:17 +02:00
rdma RDMA/core: Fix umem iterator when PAGE_SIZE is greater then HCA pgsz 2023-12-13 18:36:40 +01:00
scsi scsi: core: Fix the return value of scsi_logical_block_count() 2024-09-04 13:23:35 +02:00
soc soc: qcom: rpmh-rsc: Enhance check for VRM in-flight request 2024-06-16 13:39:55 +02:00
sound ALSA: pcm: Avoid reference to status->state 2024-12-14 19:51:30 +01:00
target scsi: target: Fix multiple LUN_RESET handling 2023-05-11 23:00:26 +09:00
trace mm/page_alloc: fix tracepoint mm_page_alloc_zone_locked() 2024-11-08 16:25:55 +01:00
uapi netlink: typographical error in nlmsg_type constants definition 2024-12-14 19:50:57 +01:00
vdso time64.h: Consolidated PSEC_PER_SEC definition 2021-04-06 16:32:17 -07:00
video video: of_display_timing.h: include errno.h 2022-07-12 16:35:10 +02:00
xen ACPI: processor: Fix evaluating _PDC method when running as Xen dom0 2023-05-11 23:00:22 +09:00