INFO: rcu detected stall in shrink_dentry

Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported
INFO: rcu detected stall in d_walk fs	C			25680	2382d	2444d

25680

2382d

2444d

Title	Replies (including bot)	Last reply
INFO: rcu detected stall in shrink_dentry_list	1 (2)	2018/04/14 09:45

INFO: rcu_sched detected stalls on CPUs/tasks: (detected by 1, t=125002 jiffies, g=21150, c=21149, q=125) All QSes seen, last rcu_sched kthread activity 125002 (4294950745-4294825743), jiffies_till_next_fqs=3, root ->qsmask 0x0 syz-executor6 R running task 21496 4544 4539 0x00000008 Call Trace: <IRQ> sched_show_task.cold.86+0x27a/0x301 kernel/sched/core.c:5321 print_other_cpu_stall.cold.79+0x92f/0x9d2 kernel/rcu/tree.c:1481 check_cpu_stall.isra.61+0x706/0xf50 kernel/rcu/tree.c:1599 __rcu_pending kernel/rcu/tree.c:3356 [inline] rcu_pending kernel/rcu/tree.c:3401 [inline] rcu_check_callbacks+0x21b/0xad0 kernel/rcu/tree.c:2763 update_process_times+0x2d/0x70 kernel/time/timer.c:1636 tick_sched_handle+0x9f/0x180 kernel/time/tick-sched.c:164 tick_sched_timer+0x45/0x130 kernel/time/tick-sched.c:1274 __run_hrtimer kernel/time/hrtimer.c:1398 [inline] __hrtimer_run_queues+0x3e3/0x10a0 kernel/time/hrtimer.c:1460 hrtimer_interrupt+0x2f3/0x750 kernel/time/hrtimer.c:1518 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1025 [inline] smp_apic_timer_interrupt+0x15d/0x710 arch/x86/kernel/apic/apic.c:1050 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:863 </IRQ> RIP: 0010:__sanitizer_cov_trace_pc+0x14/0x50 kernel/kcov.c:94 RSP: 0018:ffff8801859f7aa0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffff8801b4154780 RBX: ffff8801859f7c18 RCX: ffffffff81c672d9 RDX: 0000000000000000 RSI: ffffffff81c62cf3 RDI: ffff8801859f7c18 RBP: ffff8801859f7aa0 R08: ffff8801b4154780 R09: ffffed002ff047ac R10: ffffed002ff047ac R11: ffff88017f823d63 R12: ffff8801859f7c50 R13: dffffc0000000000 R14: 1ffff10030b3ef82 R15: ffffed0030b3ef85 shrink_dentry_list+0x5a8/0x7c0 fs/dcache.c:1087 shrink_dcache_parent+0xba/0x230 fs/dcache.c:1490 vfs_rmdir+0x202/0x470 fs/namei.c:3850 do_rmdir+0x523/0x610 fs/namei.c:3911 __do_sys_rmdir fs/namei.c:3929 [inline] __se_sys_rmdir fs/namei.c:3927 [inline] __x64_sys_rmdir+0x36/0x40 fs/namei.c:3927 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455777 RSP: 002b:00007fff92297708 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007fff922994b0 RDI: 00007fff922994b0 RBP: 00007fff922994b0 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000202 R12: 0000000000e96940 R13: 0000000000000000 R14: 0000000000000225 R15: 0000000000026a95 rcu_sched kthread starved for 125002 jiffies! g21150 c21149 f0x2 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=1 RCU grace-period kthread stack dump: rcu_sched R running task 23896 9 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2859 [inline] __schedule+0x801/0x1e30 kernel/sched/core.c:3501 schedule+0xef/0x430 kernel/sched/core.c:3545 schedule_timeout+0x138/0x240 kernel/time/timer.c:1801 rcu_gp_kthread+0x6b5/0x1940 kernel/rcu/tree.c:2231 kthread+0x345/0x410 kernel/kthread.c:240 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412

Crashes (29):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Manager
2018/05/24 05:04	upstream	bee797529d7c	f48c20b8	.config	console log	report	ci-upstream-kasan-gce-root
2018/05/23 00:25	upstream	a048a07d7f45	f48c20b8	.config	console log	report	ci-upstream-kasan-gce-root
2018/05/04 16:21	upstream	150426981426	9ce14f4b	.config	console log	report	ci-upstream-kasan-gce-root
2018/04/17 15:22	upstream	a27fc14219f2	b80fd3b5	.config	console log	report	ci-upstream-kasan-gce-root
2018/04/13 17:57	upstream	16e205cf42da	0a0c5db6	.config	console log	report	ci-upstream-kasan-gce-root
2018/06/11 10:04	bpf-next	75d4e704fa8d	ae8bdb50	.config	console log	report	ci-upstream-bpf-next-kasan-gce
2018/06/02 17:57	bpf-next	b4b21a05b8fe	2f93b54f	.config	console log	report	ci-upstream-bpf-next-kasan-gce
2018/06/01 19:06	bpf-next	bcece5dc40b9	2f93b54f	.config	console log	report	ci-upstream-bpf-next-kasan-gce
2018/05/30 04:20	bpf-next	9ce64f192d16	2f93b54f	.config	console log	report	ci-upstream-bpf-next-kasan-gce
2018/05/29 01:09	bpf-next	7a1a98c171ea	f48c20b8	.config	console log	report	ci-upstream-bpf-next-kasan-gce
2018/05/24 12:11	bpf-next	a1c818109cc8	f48c20b8	.config	console log	report	ci-upstream-bpf-next-kasan-gce
2018/05/24 02:13	bpf-next	a1c818109cc8	f48c20b8	.config	console log	report	ci-upstream-bpf-next-kasan-gce
2018/05/21 20:45	bpf-next	d849f9f9768c	f48c20b8	.config	console log	report	ci-upstream-bpf-next-kasan-gce
2018/05/18 03:03	bpf-next	eeacb7166df6	738d58ad	.config	console log	report	ci-upstream-bpf-next-kasan-gce
2018/05/14 04:44	bpf-next	a84880ef4352	481f030c	.config	console log	report	ci-upstream-bpf-next-kasan-gce
2018/05/11 13:50	bpf-next	96112e936350	12c7428a	.config	console log	report	ci-upstream-bpf-next-kasan-gce
2018/05/09 19:20	bpf-next	53a7bdfb2a27	12c7428a	.config	console log	report	ci-upstream-bpf-next-kasan-gce
2018/05/06 23:50	bpf-next	e94fa1d93117	a211da1a	.config	console log	report	ci-upstream-bpf-next-kasan-gce
2018/04/30 22:39	bpf-next	c0dd967818a2	d5b114b4	.config	console log	report	ci-upstream-bpf-next-kasan-gce
2018/04/29 08:00	bpf-next	2c25fc9a503a	d5a5d045	.config	console log	report	ci-upstream-bpf-next-kasan-gce
2018/04/29 06:56	bpf-next	2c25fc9a503a	d5a5d045	.config	console log	report	ci-upstream-bpf-next-kasan-gce
2018/04/28 20:13	bpf-next	2c25fc9a503a	d5a5d045	.config	console log	report	ci-upstream-bpf-next-kasan-gce
2018/04/26 21:51	bpf-next	9b984a20ca84	73417389	.config	console log	report	ci-upstream-bpf-next-kasan-gce
2018/04/26 21:16	bpf-next	9b984a20ca84	73417389	.config	console log	report	ci-upstream-bpf-next-kasan-gce
2018/04/22 23:27	bpf-next	878a4d328104	d23fcf6c	.config	console log	report	ci-upstream-bpf-next-kasan-gce
2018/04/22 09:07	bpf-next	878a4d328104	d23fcf6c	.config	console log	report	ci-upstream-bpf-next-kasan-gce
2018/04/21 15:33	bpf-next	878a4d328104	d23fcf6c	.config	console log	report	ci-upstream-bpf-next-kasan-gce
2018/04/20 10:54	bpf-next	34df9d37abe0	eae05cb0	.config	console log	report	ci-upstream-bpf-next-kasan-gce
2018/04/17 03:28	bpf-next	5d1365940a68	b80fd3b5	.config	console log	report	ci-upstream-bpf-next-kasan-gce

Crashes (29):

Assets (help?)

2018/05/24 05:04

upstream