KCSAN: data-race in attach_to_pi_owner / do

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in attach_to_pi_owner / do_nanosleep (3) kernel				3	1069d	1103d	0/26	auto-closed as invalid on 2021/06/24 12:20
upstream	KCSAN: data-race in attach_to_pi_owner / do_nanosleep (2) kernel				1	1184d	1184d	0/26	auto-closed as invalid on 2021/03/01 22:08

================================================================== BUG: KCSAN: data-race in attach_to_pi_owner / do_nanosleep write to 0xffff88810ad25024 of 4 bytes by task 7044 on cpu 1: freezer_do_not_count include/linux/freezer.h:109 [inline] freezable_schedule include/linux/freezer.h:171 [inline] do_nanosleep+0x127/0x320 kernel/time/hrtimer.c:1879 hrtimer_nanosleep+0x136/0x230 kernel/time/hrtimer.c:1932 __do_sys_nanosleep kernel/time/hrtimer.c:1966 [inline] __se_sys_nanosleep kernel/time/hrtimer.c:1953 [inline] __x64_sys_nanosleep+0x14b/0x190 kernel/time/hrtimer.c:1953 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff88810ad25024 of 4 bytes by task 24780 on cpu 0: attach_to_pi_owner+0x7f/0x560 kernel/futex.c:1233 futex_lock_pi_atomic+0x23f/0x260 kernel/futex.c:1438 futex_lock_pi+0x1c7/0x810 kernel/futex.c:2830 do_futex+0x6a9/0x15b0 kernel/futex.c:3821 __do_sys_futex kernel/futex.c:3869 [inline] __se_sys_futex kernel/futex.c:3837 [inline] __x64_sys_futex+0x2dc/0x410 kernel/futex.c:3837 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 24780 Comm: syz-executor.3 Not tainted 5.7.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================