INFO: rcu detected stall in mrp_join

INFO: rcu detected stall in mrp_join_timer (2)
Status: upstream: reported on 2020/02/16 10:49
Reported-by: syzbot+67edf33871a80247d3c0@syzkaller.appspotmail.com
First crash: 648d, last: 22d

similar bugs (5):
Kernel	Title	Count	Last	Reported	Patched	Status
linux-4.14	INFO: rcu detected stall in mrp_join_timer	7	487d	652d	0/1	auto-closed as invalid on 2020/10/17 01:22
upstream	INFO: rcu detected stall in mrp_join_timer	1	650d	649d	0/22	closed as invalid on 2020/01/09 08:13
linux-4.19	INFO: rcu detected stall in mrp_join_timer	28	337d	650d	0/1	auto-closed as invalid on 2021/03/15 12:15
linux-4.14	BUG: soft lockup in mrp_join_timer	1	210d	210d	0/1	auto-closed as invalid on 2021/07/20 15:25
linux-4.19	BUG: soft lockup in mrp_join_timer (2)	26	4d19h	185d	0/1	upstream: reported on 2021/04/16 18:29

Sample crash report:

rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10499 ticks this GP) idle=813/1/0x4000000000000000 softirq=169477/169477 fqs=4306 
	(t=10500 jiffies g=295857 q=8907)
NMI backtrace for cpu 1
CPU: 1 PID: 4089 Comm: syz-executor.0 Not tainted 5.15.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1dc/0x2d8 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:105
 nmi_trigger_cpumask_backtrace+0x16a/0x280 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x22d/0x390 kernel/rcu/tree_stall.h:343
 print_cpu_stall kernel/rcu/tree_stall.h:627 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:711 [inline]
 rcu_pending kernel/rcu/tree.c:3880 [inline]
 rcu_sched_clock_irq+0x1e33/0x2bc0 kernel/rcu/tree.c:2599
 update_process_times+0x197/0x200 kernel/time/timer.c:1785
 tick_sched_handle kernel/time/tick-sched.c:226 [inline]
 tick_sched_timer+0x27d/0x420 kernel/time/tick-sched.c:1421
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x4cb/0xa60 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x3b3/0x1040 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
 __sysvec_apic_timer_interrupt+0xf9/0x270 arch/x86/kernel/apic/apic.c:1103
 sysvec_apic_timer_interrupt+0x3e/0xb0 arch/x86/kernel/apic/apic.c:1097
 asm_sysvec_apic_timer_interrupt+0x12/0x20
RIP: 0010:unwind_next_frame+0xbb3/0x1fa0
Code: 00 80 3b 00 0f 85 9e 0c 00 00 80 3d 96 b1 8e 0c 00 0f 85 91 0c 00 00 c6 05 89 b1 8e 0c 01 48 c7 c7 60 6c 4b 8a e9 1b 01 00 00 <48> 89 5c 24 60 49 8d 7d 08 48 89 f8 48 c1 e8 03 42 80 3c 30 00 74
RSP: 0018:ffffc90000dc03c0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffffff8ee2b2fb RCX: ffffffff8e4a17cc
RDX: ffffc9000b36ff58 RSI: 0000000000000001 RDI: 0000000000000001
RBP: 1ffffffff1dc565f R08: 0000000000000012 R09: ffffc90000dc0570
R10: fffff520001b809c R11: 0000000000000000 R12: 1ffffffff1dc565f
R13: ffffc90000dc0480 R14: dffffc0000000000 R15: ffffffff8ee2b2fa
 arch_stack_walk+0x112/0x140 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x11b/0x1e0 kernel/stacktrace.c:121
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4c/0x80 mm/kasan/common.c:46
 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360
 ____kasan_slab_free+0x10d/0x150 mm/kasan/common.c:366
 kasan_slab_free include/linux/kasan.h:230 [inline]
 slab_free_hook mm/slub.c:1700 [inline]
 slab_free_freelist_hook+0x129/0x1a0 mm/slub.c:1725
 slab_free mm/slub.c:3483 [inline]
 kmem_cache_free+0x85/0x180 mm/slub.c:3499
 kfree_skb_list+0x41/0x70 net/core/skbuff.c:782
 __dev_xmit_skb net/core/dev.c:3867 [inline]
 __dev_queue_xmit+0x2384/0x34c0 net/core/dev.c:4170
 mrp_queue_xmit net/802/mrp.c:364 [inline]
 mrp_join_timer+0x418/0x820 net/802/mrp.c:608
 call_timer_fn+0xf6/0x210 kernel/time/timer.c:1421
 expire_timers kernel/time/timer.c:1466 [inline]
 __run_timers+0x71a/0x910 kernel/time/timer.c:1734
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1747
 __do_softirq+0x392/0x7a3 kernel/softirq.c:558
 __irq_exit_rcu+0xec/0x170 kernel/softirq.c:636
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1097
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xd4/0x130 kernel/locking/spinlock.c:194
Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 12 72 d2 f7 f6 44 24 21 02 75 4e 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> f7 f3 5d f7 65 8b 05 f8 92 06 76 85 c0 74 3f 48 c7 04 24 0e 36
RSP: 0018:ffffc9000b36f220 EFLAGS: 00000206
RAX: e2ae3a2c64401c00 RBX: 1ffff9200166de48 RCX: ffffffff90930803
RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffffc9000b36f2b0 R08: ffffffff8188f3b3 R09: ffffed10173a64a2
R10: ffffed10173a64a2 R11: 0000000000000000 R12: dffffc0000000000
R13: 1ffff9200166de44 R14: ffffc9000b36f240 R15: 0000000000000246
 rcu_preempt_deferred_qs_irqrestore+0x870/0xc40
 rcu_read_unlock_special kernel/rcu/tree_plugin.h:669 [inline]
 __rcu_read_unlock+0x4d8/0x630 kernel/rcu/tree_plugin.h:422
 rcu_read_unlock include/linux/rcupdate.h:719 [inline]
 __d_lookup+0x661/0x720 fs/dcache.c:2444
 lookup_fast+0xe0/0x800 fs/namei.c:1615
 walk_component+0x11b/0x790 fs/namei.c:1966
 link_path_walk+0x697/0xd00
 path_openat+0x25b/0x3670 fs/namei.c:3557
 do_filp_open+0x277/0x4f0 fs/namei.c:3588
 do_sys_openat2+0x13b/0x500 fs/open.c:1200
 do_sys_open fs/open.c:1216 [inline]
 __do_sys_openat fs/open.c:1232 [inline]
 __se_sys_openat fs/open.c:1227 [inline]
 __x64_sys_openat+0x243/0x290 fs/open.c:1227
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f4e247aa7f4
Code: 84 00 00 00 00 00 44 89 54 24 0c e8 96 f9 ff ff 44 8b 54 24 0c 44 89 e2 48 89 ee 41 89 c0 bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 34 44 89 c7 89 44 24 0c e8 c8 f9 ff ff 8b 44
RSP: 002b:00007f4e21d6dcc0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 00007f4e247aa7f4
RDX: 0000000000000000 RSI: 00007f4e21d6dd60 RDI: 00000000ffffff9c
RBP: 00007f4e21d6dd60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007ffed71c85ff R14: 00007f4e21d6e300 R15: 0000000000022000
----------------
Code disassembly (best guess):
   0:	00 80 3b 00 0f 85    	add    %al,-0x7af0ffc5(%rax)
   6:	9e                   	sahf
   7:	0c 00                	or     $0x0,%al
   9:	00 80 3d 96 b1 8e    	add    %al,-0x714e69c3(%rax)
   f:	0c 00                	or     $0x0,%al
  11:	0f 85 91 0c 00 00    	jne    0xca8
  17:	c6 05 89 b1 8e 0c 01 	movb   $0x1,0xc8eb189(%rip)        # 0xc8eb1a7
  1e:	48 c7 c7 60 6c 4b 8a 	mov    $0xffffffff8a4b6c60,%rdi
  25:	e9 1b 01 00 00       	jmpq   0x145
* 2a:	48 89 5c 24 60       	mov    %rbx,0x60(%rsp) <-- trapping instruction
  2f:	49 8d 7d 08          	lea    0x8(%r13),%rdi
  33:	48 89 f8             	mov    %rdi,%rax
  36:	48 c1 e8 03          	shr    $0x3,%rax
  3a:	42 80 3c 30 00       	cmpb   $0x0,(%rax,%r14,1)
  3f:	74                   	.byte 0x74

Crashes (49):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci-upstream-kasan-gce-smack-root	2021/09/26 11:28	upstream	a5e0aceabef6	8cac236e	.config	log	report	info	INFO: rcu detected stall in mrp_join_timer
ci-upstream-kasan-gce-selinux-root	2021/09/04 18:39	upstream	f1583cb1be35	d236a457	.config	log	report	info	INFO: rcu detected stall in mrp_join_timer
ci-upstream-kasan-gce-selinux-root	2021/08/10 09:01	upstream	36a21d51725a	6972b106	.config	log	report	info	INFO: rcu detected stall in mrp_join_timer
ci-upstream-kasan-gce-smack-root	2021/07/02 04:12	upstream	e058a84bfddc	658ebc66	.config	log	report	info	INFO: rcu detected stall in mrp_join_timer
ci-upstream-kasan-gce-selinux-root	2021/05/21 13:42	upstream	f01da525b3de	3c7fef33	.config	log	report	info	INFO: rcu detected stall in mrp_join_timer
ci-upstream-kasan-gce-selinux-root	2021/05/03 02:20	upstream	d2b6f8a17919	77e2b668	.config	log	report	info	INFO: rcu detected stall in mrp_join_timer
ci-upstream-kasan-gce-smack-root	2021/04/23 23:44	upstream	18a3c5f7abfd	17f0b706	.config	log	report	info	INFO: rcu detected stall in mrp_join_timer
ci-upstream-kasan-gce-root	2021/02/21 12:41	upstream	e767b3530acb	3e5ed8b4	.config	log	report	info	INFO: rcu detected stall in mrp_join_timer
ci-upstream-kasan-gce-selinux-root	2021/01/23 17:49	upstream	fe75a21824e7	52e37319	.config	log	report	info	INFO: rcu detected stall in mrp_join_timer
ci-upstream-linux-next-kasan-gce-root	2021/06/03 13:18	linux-next	a1f92694393a	0740de69	.config	log	report	info	INFO: rcu detected stall in mrp_join_timer
ci-upstream-kasan-gce	2021/01/10 20:46	upstream	2ff90100ace8	2c1f2513	.config	log	report	info
ci-upstream-kasan-gce	2020/12/20 10:19	upstream	467f8165a2b0	04201c06	.config	log	report	info
ci-upstream-kasan-gce-root	2020/11/07 03:05	upstream	bf3e76289cd2	64069d48	.config	log	report	info
ci-upstream-kasan-gce	2020/11/04 18:28	upstream	4ef8451b3326	cba33199	.config	log	report	info
ci-upstream-kasan-gce	2020/10/12 23:38	upstream	bbf5c979011a	d32b0bbf	.config	log	report	info
ci-upstream-kasan-gce	2020/09/12 04:39	upstream	e8878ab82545	79fb24e2	.config	log	report
ci-upstream-kasan-gce	2020/09/04 21:21	upstream	59126901f200	abf9ba4f	.config	log	report
ci-upstream-kasan-gce-smack-root	2020/08/29 18:17	upstream	4d41ead6ead9	d5a3ae1f	.config	log	report
ci-upstream-kasan-gce	2020/08/26 00:43	upstream	abb3438d69fb	344da168	.config	log	report
ci-upstream-kasan-gce-selinux-root	2020/08/23 08:32	upstream	c3d8f220d012	1da71ab0	.config	log	report
ci-upstream-kasan-gce-root	2020/08/23 06:37	upstream	c3d8f220d012	1da71ab0	.config	log	report
ci-upstream-kasan-gce-root	2020/08/21 01:44	upstream	da2968ff879b	1d75fe45	.config	log	report
ci-upstream-kasan-gce-smack-root	2020/08/20 17:35	upstream	7eac66d0456f	ed282a3a	.config	log	report
ci-upstream-kasan-gce-selinux-root	2020/08/16 12:06	upstream	d84835b118ed	424dd8e7	.config	log	report
ci-upstream-kasan-gce-selinux-root	2020/08/16 09:07	upstream	d84835b118ed	424dd8e7	.config	log	report
ci-upstream-kasan-gce	2020/08/16 01:51	upstream	c9c9735c46f5	424dd8e7	.config	log	report
ci-upstream-kasan-gce	2020/08/13 03:13	upstream	fb893de323e2	bc15f7db	.config	log	report
ci-upstream-kasan-gce-root	2020/08/07 06:28	upstream	47ec5303d73e	1f122f88	.config	log	report
ci-upstream-kasan-gce-selinux-root	2020/08/03 07:21	upstream	5a30a78924ec	196277c4	.config	log	report
ci-upstream-kasan-gce-selinux-root	2020/07/21 14:45	upstream	4fa640dc5230	d88894e6	.config	log	report
ci-upstream-kasan-gce	2020/07/13 03:01	upstream	4437dd6e8f71	9ebcc5b1	.config	log	report
ci-upstream-kasan-gce-root	2020/07/03 16:20	upstream	cd77006e01b3	bed10395	.config	log	report
ci-upstream-kasan-gce	2020/05/24 20:44	upstream	caffb99b6929	bd28eb9d	.config	log	report
ci-upstream-kasan-gce-root	2020/03/13 12:10	upstream	3cc6e2c599cd	d850e9d0	.config	log	report
ci-upstream-kasan-gce-root	2020/02/23 19:23	upstream	0a115e5f23b9	2c36e7a7	.config	log	report
ci-upstream-kasan-gce	2020/02/12 02:06	upstream	0a679e13ea30	4d1ab643	.config	log	report
ci-upstream-kasan-gce-root	2020/02/08 05:37	upstream	41dcd67e8868	06150bf1	.config	log	report
ci-upstream-kasan-gce	2020/02/02 01:47	upstream	94f2630b1897	2274ad39	.config	log	report
ci-upstream-kasan-gce-smack-root	2020/01/31 21:13	upstream	ccaaaf6fe5a5	c30117b2	.config	log	report
ci-upstream-kasan-gce-selinux-root	2020/01/30 01:33	upstream	b3a608222336	5ed23f9a	.config	log	report
ci-upstream-kasan-gce-root	2020/01/24 05:13	upstream	4703d9119972	2e95ab33	.config	log	report
ci-upstream-kasan-gce-smack-root	2020/01/19 19:03	upstream	8f8972a3127f	0342f8c7	.config	log	report
ci-upstream-kasan-gce	2020/01/14 09:13	upstream	b3a987b0264d	32881205	.config	log	report
ci-upstream-kasan-gce	2020/01/10 06:53	upstream	e69ec487b2c7	4de4e9f0	.config	log	report
ci-upstream-kasan-gce-386	2020/07/30 18:19	upstream	d3590ebf6f91	233283a1	.config	log	report
ci-upstream-linux-next-kasan-gce-root	2020/11/07 20:27	linux-next	c34f157421f6	64069d48	.config	log	report	info
ci-upstream-linux-next-kasan-gce-root	2020/08/23 20:50	linux-next	494d311a82bb	cef5ae68	.config	log	report
ci-upstream-linux-next-kasan-gce-root	2020/07/22 12:40	linux-next	de2e69cfe54a	128cd85f	.config	log	report
ci-upstream-linux-next-kasan-gce-root	2020/07/13 07:44	linux-next	d31958b30ea3	9ebcc5b1	.config	log	report