KCSAN: data-race in do_epoll_ctl / do_epoll

Kernel	Title	Rank 🛈	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in do_epoll_ctl / do_epoll_ctl (4) fs	6	1	983d	983d	0/29	auto-obsoleted due to no activity on 2023/07/22 09:13
upstream	KCSAN: data-race in do_epoll_ctl / do_epoll_ctl (2) fs	6	1	1458d	1458d	0/29	auto-closed as invalid on 2022/04/03 20:50
upstream	KCSAN: data-race in do_epoll_ctl / do_epoll_ctl (5) fs	6	1	708d	708d	0/29	auto-obsoleted due to no activity on 2024/04/22 09:35
upstream	KCSAN: data-race in do_epoll_ctl / do_epoll_ctl fs	6	1	1922d	1901d	0/29	auto-closed as invalid on 2020/12/25 16:54

================================================================== BUG: KCSAN: data-race in do_epoll_ctl / do_epoll_ctl read-write to 0xffffffff870cfc30 of 8 bytes by task 15272 on cpu 1: do_epoll_ctl+0x641/0x890 fs/eventpoll.c:2137 __do_sys_epoll_ctl fs/eventpoll.c:2214 [inline] __se_sys_epoll_ctl fs/eventpoll.c:2205 [inline] __x64_sys_epoll_ctl+0xc2/0xf0 fs/eventpoll.c:2205 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd read to 0xffffffff870cfc30 of 8 bytes by task 15276 on cpu 0: do_epoll_ctl+0x4ab/0x890 fs/eventpoll.c:2131 __do_sys_epoll_ctl fs/eventpoll.c:2214 [inline] __se_sys_epoll_ctl fs/eventpoll.c:2205 [inline] __x64_sys_epoll_ctl+0xc2/0xf0 fs/eventpoll.c:2205 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd value changed: 0x000000000000005a -> 0x000000000000005c Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 15276 Comm: syz-executor.2 Not tainted 5.19.0-syzkaller-13930-g7ebfc85e2cd7-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 ==================================================================