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 (2) fs	6	1	1257d	1257d	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	507d	507d	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	1721d	1700d	0/29	auto-closed as invalid on 2020/12/25 16:54
upstream	KCSAN: data-race in do_epoll_ctl / do_epoll_ctl (3) fs	6	1	1091d	1091d	0/29	auto-closed as invalid on 2022/09/16 09:55

================================================================== BUG: KCSAN: data-race in do_epoll_ctl / do_epoll_ctl read-write to 0xffffffff86f62b10 of 8 bytes by task 27075 on cpu 0: do_epoll_ctl+0x8be/0x920 fs/eventpoll.c:2258 __do_sys_epoll_ctl fs/eventpoll.c:2284 [inline] __se_sys_epoll_ctl fs/eventpoll.c:2275 [inline] __x64_sys_epoll_ctl+0xc6/0xf0 fs/eventpoll.c:2275 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd read to 0xffffffff86f62b10 of 8 bytes by task 27077 on cpu 1: do_epoll_ctl+0x4ff/0x920 fs/eventpoll.c:2195 __do_sys_epoll_ctl fs/eventpoll.c:2284 [inline] __se_sys_epoll_ctl fs/eventpoll.c:2275 [inline] __x64_sys_epoll_ctl+0xc6/0xf0 fs/eventpoll.c:2275 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd value changed: 0x0000000000001055 -> 0x000000000000106c Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 27077 Comm: syz-executor.3 Not tainted 6.4.0-rc6-syzkaller-00242-g1639fae5132b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 ==================================================================