INFO: rcu detected stall in sys_clock

INFO: rcu detected stall in sys_clock_settime
Status: upstream: reported C repro on 2020/07/12 17:54
Reported-by: syzbot+f3bd350a4124f10acdae@syzkaller.appspotmail.com
First crash: 293d, last: 20h21m

Cause bisection: introduced by (bisect log) :
commit 5a781ccbd19e4664babcbe4b4ead7aa2b9283d22
Author: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Date: Sat Sep 29 00:59:43 2018 +0000

tc: Add support for configuring the taprio scheduler

Crash: INFO: rcu detected stall in corrupted (log)
Repro: C syz .config

Sample crash report:

rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...0: (0 ticks this GP) idle=8b2/1/0x4000000000000000 softirq=9345/9345 fqs=5249 
	(detected by 1, t=10502 jiffies, g=8877, q=3702)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 6876 Comm: syz-executor967 Not tainted 5.8.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:arch_local_save_flags arch/x86/include/asm/paravirt.h:765 [inline]
RIP: 0010:arch_local_irq_save arch/x86/include/asm/paravirt.h:787 [inline]
RIP: 0010:lock_release+0xca/0x8e0 kernel/locking/lockdep.c:5019
Code: 00 44 8b 8b cc 08 00 00 45 85 c9 0f 85 e0 03 00 00 48 c7 c0 40 34 b6 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 <0f> 85 05 07 00 00 48 83 3d 78 c4 5b 08 00 0f 84 4d 05 00 00 9c 58
RSP: 0018:ffffc90000007cb0 EFLAGS: 00000046
RAX: 1ffffffff136c688 RBX: ffff8880931dc300 RCX: ffffffff866a7c13
RDX: dffffc0000000000 RSI: ffffffff866a798b RDI: ffff8880931dcbcc
RBP: 1ffff92000000f98 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff89bd62c0
R13: ffffffff866a798b R14: ffff8880a798b120 R15: 1769ee212ed3dc42
FS:  000000000227d880(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000610 CR3: 00000000a75d0000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 rcu_lock_release include/linux/rcupdate.h:246 [inline]
 rcu_read_unlock include/linux/rcupdate.h:688 [inline]
 advance_sched+0x56d/0x990 net/sched/sch_taprio.c:754
 __run_hrtimer kernel/time/hrtimer.c:1524 [inline]
 __hrtimer_run_queues+0x6a9/0xfc0 kernel/time/hrtimer.c:1588
 hrtimer_interrupt+0x32a/0x930 kernel/time/hrtimer.c:1650
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline]
 __sysvec_apic_timer_interrupt+0x142/0x5e0 arch/x86/kernel/apic/apic.c:1097
 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 sysvec_apic_timer_interrupt+0xb2/0xf0 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:770 [inline]
RIP: 0010:on_each_cpu+0x149/0x240 kernel/smp.c:701
Code: 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 e6 00 00 00 48 83 3d 9f da 4c 08 00 0f 84 af 00 00 00 e8 dc ef 0a 00 48 89 df 57 9d <0f> 1f 44 00 00 e8 cd ef 0a 00 bf 01 00 00 00 e8 c3 67 e6 ff 31 ff
RSP: 0018:ffffc90005807d78 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000293 RCX: 1ffffffff15635e9
RDX: ffff8880931dc300 RSI: ffffffff816959b4 RDI: 0000000000000293
RBP: 0000000000000200 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffffc90005807ed8 R15: ffffffffa0cbea01
 clock_was_set+0x18/0x20 kernel/time/hrtimer.c:876
 do_settimeofday64 kernel/time/timekeeping.c:1260 [inline]
 do_settimeofday64+0x39d/0x570 kernel/time/timekeeping.c:1226
 do_sys_settimeofday64 kernel/time/time.c:195 [inline]
 do_sys_settimeofday64+0x1de/0x260 kernel/time/time.c:169
 __do_sys_clock_settime kernel/time/posix-timers.c:1079 [inline]
 __se_sys_clock_settime kernel/time/posix-timers.c:1067 [inline]
 __x64_sys_clock_settime+0x197/0x260 kernel/time/posix-timers.c:1067
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x443859
Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 0f fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffd9ff81418 EFLAGS: 00000246 ORIG_RAX: 00000000000000e3
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000443859
RDX: 0000000000443859 RSI: 0000000020000400 RDI: 0000000000000000
RBP: 00007ffd9ff81420 R08: 0000000001bbbbbb R09: 0000000001bbbbbb
R10: 0000000001bbbbbb R11: 0000000000000246 R12: 00007ffd9ff81430
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000

Fix bisection attempts:
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro
ci-upstream-kasan-gce-root	2021/04/05 17:45	upstream	e49d033b	bb3e5fe6	.config	log		syz	C
ci-upstream-kasan-gce-root	2021/03/01 08:45	upstream	fe07bfda	bb3e5fe6	.config	log		syz	C
ci-upstream-kasan-gce-root	2021/01/08 12:03	upstream	f5e6c330	bb3e5fe6	.config	log	report	syz	C
ci-upstream-kasan-gce-root	2020/10/28 23:42	upstream	23859ae4	bb3e5fe6	.config	log		syz	C

Crashes (94):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Title
ci-upstream-kasan-gce-root	2020/08/12 16:29	upstream	c636eef2	bb3e5fe6	.config	log	report	syz	C
ci-upstream-kasan-gce-smack-root	2020/08/06 07:29	upstream	fffe3ae0	0487ea6f	.config	log	report	syz	C
ci-upstream-kasan-gce-selinux-root	2020/07/28 18:43	upstream	92ed3019	cb93dc6a	.config	log	report	syz	C
ci-upstream-kasan-gce-selinux-root	2020/07/24 04:03	upstream	d15be546	70c104a1	.config	log	report	syz	C
ci-upstream-kasan-gce-root	2020/07/15 10:24	upstream	e9919e11	609fb517	.config	log	report	syz	C
ci-upstream-kasan-gce-root	2020/07/09 17:20	upstream	0bddd227	bc238812	.config	log	report	syz	C
ci-upstream-kasan-gce-smack-root	2020/07/09 10:05	upstream	0bddd227	bc238812	.config	log	report	syz	C
ci-upstream-kasan-gce-root	2020/07/09 08:44	upstream	0bddd227	bc238812	.config	log	report	syz	C
ci-upstream-kasan-gce-selinux-root	2020/07/09 07:14	upstream	0bddd227	bc238812	.config	log	report	syz	C
ci-upstream-kasan-gce-smack-root	2020/07/08 20:29	upstream	7cc2a8ea	51095195	.config	log	report	syz	C
ci-upstream-kasan-gce-selinux-root	2020/07/08 17:45	upstream	7cc2a8ea	51095195	.config	log	report	syz	C
ci-upstream-linux-next-kasan-gce-root	2020/08/03 15:43	linux-next	01830e6c	196277c4	.config	log	report	syz	C
ci-upstream-linux-next-kasan-gce-root	2020/07/20 06:35	linux-next	4c43049f	9c812472	.config	log	report	syz	C
ci-upstream-linux-next-kasan-gce-root	2020/07/13 05:06	linux-next	d31958b3	9ebcc5b1	.config	log	report	syz	C
ci-upstream-linux-next-kasan-gce-root	2020/07/11 16:34	linux-next	d31958b3	18d18b59	.config	log	report	syz	C
ci-upstream-linux-next-kasan-gce-root	2020/07/11 08:56	linux-next	d31958b3	18d18b59	.config	log	report	syz	C
ci-upstream-kasan-gce-root	2021/04/21 03:27	upstream	1fe5501b	c0ced557	.config	log	report			info	INFO: rcu detected stall in sys_clock_settime
ci-upstream-kasan-gce-root	2021/04/09 22:10	upstream	17e7124a	6a81331a	.config	log	report			info	INFO: rcu detected stall in sys_clock_settime
ci-upstream-kasan-gce-root	2021/03/06 17:17	upstream	a38fd874	e4b4d570	.config	log	report			info	INFO: rcu detected stall in sys_clock_settime
ci-upstream-linux-next-kasan-gce-root	2021/04/15 21:35	linux-next	1216f02e	c59079a6	.config	log	report			info	INFO: rcu detected stall in sys_clock_settime
ci-upstream-kasan-gce-smack-root	2020/11/11 10:18	upstream	eccc8767	cca87986	.config	log	report			info
ci-upstream-kasan-gce-root	2020/09/28 23:15	upstream	a1b8638b	6bfdbe89	.config	log	report			info
ci-upstream-kasan-gce-smack-root	2020/09/27 23:28	upstream	a1bffa48	5dd8aee8	.config	log	report			info
ci-upstream-kasan-gce-selinux-root	2020/09/19 18:18	upstream	eb5f95f1	53ce8104	.config	log	report			info
ci-upstream-kasan-gce-selinux-root	2020/09/19 16:15	upstream	eb5f95f1	53ce8104	.config	log	report			info
ci-upstream-kasan-gce-selinux-root	2020/09/18 06:49	upstream	4cbffc46	38962c8b	.config	log	report			info
ci-upstream-kasan-gce-root	2020/09/17 16:48	upstream	5925fa68	8247808b	.config	log	report			info
ci-upstream-kasan-gce-selinux-root	2020/09/17 15:01	upstream	5925fa68	8247808b	.config	log	report			info
ci-upstream-kasan-gce-selinux-root	2020/09/17 01:08	upstream	5925fa68	8247808b	.config	log	report			info
ci-upstream-kasan-gce-root	2020/09/14 08:04	upstream	e4c26faa	2d3cdd63	.config	log	report
ci-upstream-kasan-gce-smack-root	2020/09/07 18:27	upstream	f4d51dff	abf9ba4f	.config	log	report
ci-upstream-kasan-gce-smack-root	2020/09/06 09:19	upstream	9322c47b	abf9ba4f	.config	log	report
ci-upstream-kasan-gce-smack-root	2020/09/04 10:00	upstream	e28f0104	abf9ba4f	.config	log	report
ci-upstream-kasan-gce-selinux-root	2020/09/04 00:17	upstream	e28f0104	abf9ba4f	.config	log	report
ci-upstream-kasan-gce-root	2020/08/31 16:58	upstream	f75aef39	d5a3ae1f	.config	log	report
ci-upstream-kasan-gce-root	2020/08/31 02:24	upstream	dcc5c6f0	d5a3ae1f	.config	log	report
ci-upstream-kasan-gce-smack-root	2020/08/27 06:12	upstream	15bc20c6	816e0689	.config	log	report
ci-upstream-kasan-gce-smack-root	2020/08/23 13:02	upstream	c3d8f220	cef5ae68	.config	log	report
ci-upstream-kasan-gce-root	2020/08/20 21:14	upstream	7eac66d0	1d75fe45	.config	log	report
ci-upstream-kasan-gce-root	2020/08/18 01:52	upstream	9123e3a7	424dd8e7	.config	log	report
ci-upstream-kasan-gce-selinux-root	2020/08/10 01:54	upstream	9420f1ce	70301872	.config	log	report
ci-upstream-kasan-gce-selinux-root	2020/08/09 15:04	upstream	06a81c1c	70301872	.config	log	report
ci-upstream-kasan-gce-root	2020/08/09 07:02	upstream	06a81c1c	f721e4a0	.config	log	report
ci-upstream-kasan-gce-root	2020/08/08 16:23	upstream	449dc8c9	f721e4a0	.config	log	report
ci-upstream-kasan-gce-smack-root	2020/08/08 04:04	upstream	5631c5e0	ff51e522	.config	log	report
ci-upstream-kasan-gce-smack-root	2020/08/03 01:39	upstream	5a30a789	63a73341	.config	log	report
ci-upstream-kasan-gce-root	2020/08/02 18:28	upstream	ac3a0c84	63a73341	.config	log	report
ci-upstream-kasan-gce-smack-root	2020/08/02 01:41	upstream	d52daa86	d895b3be	.config	log	report
ci-upstream-kasan-gce-root	2020/07/30 20:42	upstream	83bdc727	233283a1	.config	log	report
ci-upstream-kasan-gce-smack-root	2020/07/27 04:00	upstream	92ed3019	51265195	.config	log	report
ci-upstream-kasan-gce-selinux-root	2020/07/26 11:50	upstream	04300d66	51265195	.config	log	report
ci-upstream-kasan-gce-root	2020/07/23 18:26	upstream	d15be546	70c104a1	.config	log	report
ci-upstream-kasan-gce-smack-root	2020/07/23 17:20	upstream	d15be546	70c104a1	.config	log	report
ci-upstream-kasan-gce-smack-root	2020/07/22 23:03	upstream	8c26c87b	340ea530	.config	log	report
ci-upstream-kasan-gce-selinux-root	2020/07/02 15:56	upstream	cd77006e	bed10395	.config	log	report
ci-upstream-linux-next-kasan-gce-root	2020/12/09 06:52	linux-next	a9e26cb5	40cc414d	.config	log	report			info
ci-upstream-linux-next-kasan-gce-root	2020/11/30 13:47	linux-next	c6b11acc	78d50c1d	.config	log	report			info
ci-upstream-linux-next-kasan-gce-root	2020/10/31 14:50	linux-next	4e78c578	8bc4594f	.config	log	report			info
ci-upstream-linux-next-kasan-gce-root	2020/09/09 14:31	linux-next	7204eaa2	0ea7a887	.config	log	report
ci-upstream-linux-next-kasan-gce-root	2020/09/03 06:21	linux-next	4442749a	abf9ba4f	.config	log	report
ci-upstream-linux-next-kasan-gce-root	2020/09/02 18:16	linux-next	4442749a	abf9ba4f	.config	log	report
ci-upstream-linux-next-kasan-gce-root	2020/08/20 06:50	linux-next	605cbf3d	ed282a3a	.config	log	report
ci-upstream-linux-next-kasan-gce-root	2020/08/05 10:00	linux-next	01830e6c	b7129355	.config	log	report
ci-upstream-linux-next-kasan-gce-root	2020/07/26 06:39	linux-next	26027945	1f7cc1ca	.config	log	report
ci-upstream-linux-next-kasan-gce-root	2020/07/22 07:56	linux-next	de2e69cf	128cd85f	.config	log	report