================================================================== BUG: KCSAN: data-race in do_epoll_wait / do_epoll_wait write to 0xffff88810450e1d8 of 8 bytes by task 1077 on cpu 1: 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:1649 [inline] ep_poll fs/eventpoll.c:1799 [inline] do_epoll_wait+0x4f1/0xf10 fs/eventpoll.c:2227 do_epoll_pwait fs/eventpoll.c:2261 [inline] __do_sys_epoll_pwait fs/eventpoll.c:2274 [inline] __se_sys_epoll_pwait+0x12b/0x240 fs/eventpoll.c:2268 __x64_sys_epoll_pwait+0x74/0x80 fs/eventpoll.c:2268 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff88810450e1d8 of 8 bytes by task 1097 on cpu 0: list_empty_careful include/linux/list.h:319 [inline] ep_events_available fs/eventpoll.c:374 [inline] ep_poll fs/eventpoll.c:1790 [inline] do_epoll_wait+0x26e/0xf10 fs/eventpoll.c:2227 do_epoll_pwait fs/eventpoll.c:2261 [inline] __do_sys_epoll_pwait fs/eventpoll.c:2274 [inline] __se_sys_epoll_pwait+0x12b/0x240 fs/eventpoll.c:2268 __x64_sys_epoll_pwait+0x74/0x80 fs/eventpoll.c:2268 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0xffff88810450e1d0 -> 0xffff888104fd9198 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 1097 Comm: syz-fuzzer Tainted: G W 5.15.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================