KCSAN: data-race in __lock_timer / do_timer

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in __lock_timer / do_timer_create kernel	6				1	1224d	1224d	0/29	auto-closed as invalid on 2022/04/22 16:54
upstream	KCSAN: data-race in __lock_timer / do_timer_create (3) kernel	6				1	819d	819d	0/29	auto-obsoleted due to no activity on 2023/06/02 06:33

================================================================== BUG: KCSAN: data-race in __lock_timer / do_timer_create write to 0xffff888105664960 of 8 bytes by task 23780 on cpu 1: do_timer_create+0x95c/0xa90 kernel/time/posix-timers.c:561 __se_sys_timer_create kernel/time/posix-timers.c:577 [inline] __x64_sys_timer_create+0xb7/0xe0 kernel/time/posix-timers.c:577 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+0x46/0xb0 read to 0xffff888105664960 of 8 bytes by task 23781 on cpu 0: __posix_timers_find kernel/time/posix-timers.c:126 [inline] posix_timer_by_id kernel/time/posix-timers.c:137 [inline] __lock_timer+0x9c/0x180 kernel/time/posix-timers.c:626 do_timer_settime+0x103/0x240 kernel/time/posix-timers.c:914 __do_sys_timer_settime kernel/time/posix-timers.c:952 [inline] __se_sys_timer_settime kernel/time/posix-timers.c:938 [inline] __x64_sys_timer_settime+0xe4/0x150 kernel/time/posix-timers.c:938 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+0x46/0xb0 value changed: 0x0000000000000000 -> 0xffff8881084cd240 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 23781 Comm: syz-executor.4 Not tainted 5.18.0-syzkaller-01157-g143a6252e1b8-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================