syzbot

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BUG: KCSAN: data-race in do_timerfd_settime / do_timerfd_settime

write to 0xffff888107b8abd4 of 1 bytes by task 11615 on cpu 1:
 timerfd_setup_cancel fs/timerfd.c:166 [inline]
 do_timerfd_settime+0x989/0xa70 fs/timerfd.c:476
 __do_sys_timerfd_settime fs/timerfd.c:567 [inline]
 __se_sys_timerfd_settime fs/timerfd.c:558 [inline]
 __x64_sys_timerfd_settime+0xb5/0x140 fs/timerfd.c:558
 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+0x44/0xae

read to 0xffff888107b8abd4 of 1 bytes by task 11609 on cpu 0:
 timerfd_canceled fs/timerfd.c:153 [inline]
 timerfd_setup fs/timerfd.c:227 [inline]
 do_timerfd_settime+0x8a8/0xa70 fs/timerfd.c:519
 __do_sys_timerfd_settime fs/timerfd.c:567 [inline]
 __se_sys_timerfd_settime fs/timerfd.c:558 [inline]
 __x64_sys_timerfd_settime+0xb5/0x140 fs/timerfd.c:558
 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+0x44/0xae

value changed: 0x00 -> 0x01

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 11609 Comm: syz-executor.5 Not tainted 5.18.0-rc3-syzkaller-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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