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	825d	825d	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 (5) fs	6	1	550d	550d	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	1764d	1743d	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	1134d	1134d	0/29	auto-closed as invalid on 2022/09/16 09:55

================================================================== BUG: KCSAN: data-race in do_epoll_ctl / do_epoll_ctl write to 0xffffffff86df1a70 of 8 bytes by task 22591 on cpu 0: do_epoll_ctl+0x1786/0x1880 fs/eventpoll.c:2166 __do_sys_epoll_ctl fs/eventpoll.c:2192 [inline] __se_sys_epoll_ctl fs/eventpoll.c:2183 [inline] __x64_sys_epoll_ctl+0xc2/0xf0 fs/eventpoll.c:2183 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffffffff86df1a70 of 8 bytes by task 22593 on cpu 1: do_epoll_ctl+0x3ce/0x1880 fs/eventpoll.c:2109 __do_sys_epoll_ctl fs/eventpoll.c:2192 [inline] __se_sys_epoll_ctl fs/eventpoll.c:2183 [inline] __x64_sys_epoll_ctl+0xc2/0xf0 fs/eventpoll.c:2183 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x0000000000000003 -> 0x0000000000000004 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 22593 Comm: syz-executor.4 Not tainted 5.17.0-rc5-syzkaller-00306-g2293be58d6a1-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================