================================================================== BUG: KCSAN: data-race in do_epoll_wait / do_epoll_wait write to 0xffff88810c9a8658 of 8 bytes by task 8390 on cpu 0: INIT_LIST_HEAD include/linux/list.h:36 [inline] list_splice_init include/linux/list.h:483 [inline] ep_start_scan fs/eventpoll.c:615 [inline] ep_send_events fs/eventpoll.c:1641 [inline] ep_poll fs/eventpoll.c:1792 [inline] do_epoll_wait+0x4d3/0xf00 fs/eventpoll.c:2220 do_epoll_pwait fs/eventpoll.c:2254 [inline] __do_sys_epoll_pwait fs/eventpoll.c:2267 [inline] __se_sys_epoll_pwait+0xfb/0x210 fs/eventpoll.c:2261 __x64_sys_epoll_pwait+0x74/0x80 fs/eventpoll.c:2261 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff88810c9a8658 of 8 bytes by task 8388 on cpu 1: list_empty_careful include/linux/list.h:319 [inline] ep_events_available fs/eventpoll.c:374 [inline] ep_poll fs/eventpoll.c:1783 [inline] do_epoll_wait+0x292/0xf00 fs/eventpoll.c:2220 do_epoll_pwait fs/eventpoll.c:2254 [inline] __do_sys_epoll_pwait fs/eventpoll.c:2267 [inline] __se_sys_epoll_pwait+0xfb/0x210 fs/eventpoll.c:2261 __x64_sys_epoll_pwait+0x74/0x80 fs/eventpoll.c:2261 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 8388 Comm: syz-fuzzer Tainted: G W 5.12.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================