KCSAN: data-race in ktime_get_ts64 / timekeeping

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in ktime_get_ts64 / timekeeping_advance kernel				3	1905d	1917d	0/28	closed as invalid on 2019/11/19 14:44

================================================================== BUG: KCSAN: data-race in ktime_get_ts64 / timekeeping_advance write to 0xffffffff88ae90c8 of 280 bytes by interrupt on cpu 0: timekeeping_advance+0x88e/0xd80 include/linux/string.h:381 update_wall_time+0x15/0x20 kernel/time/timekeeping.c:2136 tick_do_update_jiffies64+0x1e5/0x2a0 kernel/time/tick-sched.c:101 tick_sched_do_timer+0xc7/0xd0 kernel/time/tick-sched.c:147 tick_sched_timer+0x3f/0xd0 kernel/time/tick-sched.c:1313 __run_hrtimer kernel/time/hrtimer.c:1520 [inline] __hrtimer_run_queues+0x271/0x600 kernel/time/hrtimer.c:1584 hrtimer_interrupt+0x226/0x490 kernel/time/hrtimer.c:1646 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1113 [inline] smp_apic_timer_interrupt+0xd8/0x270 arch/x86/kernel/apic/apic.c:1138 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 arch_local_irq_restore arch/x86/include/asm/paravirt.h:759 [inline] kcsan_setup_watchpoint+0x25a/0x440 kernel/kcsan/core.c:542 tomoyo_check_acl+0x1aa/0x280 security/tomoyo/domain.c:171 tomoyo_path2_perm+0x38e/0x470 security/tomoyo/file.c:942 tomoyo_path_rename+0x97/0xd0 security/tomoyo/tomoyo.c:285 security_path_rename+0x17d/0x1e0 security/security.c:1130 do_renameat2+0x6d5/0xa50 fs/namei.c:4433 __do_sys_rename fs/namei.c:4483 [inline] __se_sys_rename fs/namei.c:4481 [inline] __x64_sys_rename+0x44/0x60 fs/namei.c:4481 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffffffff88ae90e8 of 8 bytes by task 15647 on cpu 1: timekeeping_delta_to_ns kernel/time/timekeeping.c:363 [inline] timekeeping_get_ns kernel/time/timekeeping.c:375 [inline] ktime_get_ts64+0x12c/0x2c0 kernel/time/timekeeping.c:892 posix_get_monotonic_timespec+0x45/0x110 kernel/time/posix-timers.c:199 __do_sys_clock_gettime kernel/time/posix-timers.c:1092 [inline] __se_sys_clock_gettime kernel/time/posix-timers.c:1082 [inline] __x64_sys_clock_gettime+0xae/0x160 kernel/time/posix-timers.c:1082 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: 1 PID: 15647 Comm: syz-executor.0 Not tainted 5.7.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================

Crashes (10):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Manager
2020/06/12 10:25	https://github.com/google/ktsan.git kcsan	7c3cd68e5d38	819b58b0	.config	console log	report	ci2-upstream-kcsan-gce
2020/06/09 12:23	https://github.com/google/ktsan.git kcsan	7c3cd68e5d38	092934c1	.config	console log	report	ci2-upstream-kcsan-gce
2020/04/21 00:42	https://github.com/google/ktsan.git kcsan	7c3cd68e5d38	98a9f9e6	.config	console log	report	ci2-upstream-kcsan-gce
2020/04/17 10:22	https://github.com/google/ktsan.git kcsan	7c3cd68e5d38	18397578	.config	console log	report	ci2-upstream-kcsan-gce
2020/03/09 10:19	https://github.com/google/ktsan.git kcsan	941e0d917bbf	2e9971bb	.config	console log	report	ci2-upstream-kcsan-gce
2020/03/04 11:32	https://github.com/google/ktsan.git kcsan	766d004d1b85	712198ac	.config	console log	report	ci2-upstream-kcsan-gce
2020/02/29 05:35	https://github.com/google/ktsan.git kcsan	766d004d1b85	c88c7b75	.config	console log	report	ci2-upstream-kcsan-gce
2020/02/14 03:45	https://github.com/google/ktsan.git kcsan	b12d66a6c34f	5d7b90f1	.config	console log	report	ci2-upstream-kcsan-gce
2020/01/15 18:41	https://github.com/google/ktsan.git kcsan	245a43005292	f9b69507	.config	console log	report	ci2-upstream-kcsan-gce
2020/01/07 23:45	https://github.com/google/ktsan.git kcsan	245a43005292	6738e0b3	.config	console log	report	ci2-upstream-kcsan-gce

Crashes (10):

Assets (help?)