INFO: rcu detected stall in garp_join

INFO: rcu detected stall in garp_join_timer (2)
Status: upstream: reported on 2020/02/16 10:50
Reported-by: syzbot+3fb2b230a1134a93a964@syzkaller.appspotmail.com
First crash: 383d, last: 65d

similar bugs (5):
Kernel	Title	Count	Last	Reported	Patched	Status
linux-4.19	INFO: rcu detected stall in garp_join_timer	7	354d	385d	0/1	auto-closed as invalid on 2020/06/07 13:30
upstream	INFO: rcu detected stall in garp_join_timer	1	425d	425d	0/19	closed as invalid on 2019/11/29 14:24
linux-4.14	INFO: rcu detected stall in garp_join_timer	4	349d	364d	0/1	auto-closed as invalid on 2020/06/12 11:13
linux-4.19	INFO: rcu detected stall in garp_join_timer (2)	1	221d	221d	0/1	auto-closed as invalid on 2020/10/18 11:34
linux-4.19	INFO: rcu detected stall in garp_join_timer (3)	1	14d	14d	0/1	upstream: reported on 2021/01/13 13:34

Sample crash report:

rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (10500 ticks this GP) idle=4aa/1/0x4000000000000000 softirq=119676/119676 fqs=10 
	(t=10500 jiffies g=200321 q=267)
rcu: rcu_preempt kthread starved for 10466 jiffies! g200321 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:29168 pid:   11 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:3774 [inline]
 __schedule+0x893/0x2130 kernel/sched/core.c:4523
 schedule+0xcf/0x270 kernel/sched/core.c:4601
 schedule_timeout+0x148/0x250 kernel/time/timer.c:1871
 rcu_gp_fqs_loop kernel/rcu/tree.c:1925 [inline]
 rcu_gp_kthread+0xb4c/0x1c90 kernel/rcu/tree.c:2099
 kthread+0x3af/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
NMI backtrace for cpu 1
CPU: 1 PID: 25296 Comm: syz-executor.1 Not tainted 5.10.0-rc4-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:77 [inline]
 dump_stack+0x107/0x163 lib/dump_stack.c:118
 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105
 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x1e3/0x21e kernel/rcu/tree_stall.h:331
 print_cpu_stall kernel/rcu/tree_stall.h:563 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:637 [inline]
 rcu_pending kernel/rcu/tree.c:3694 [inline]
 rcu_sched_clock_irq.cold+0x472/0xee8 kernel/rcu/tree.c:2567
 update_process_times+0x77/0xd0 kernel/time/timer.c:1709
 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:176
 tick_sched_timer+0x1d1/0x2a0 kernel/time/tick-sched.c:1328
 __run_hrtimer kernel/time/hrtimer.c:1519 [inline]
 __hrtimer_run_queues+0x1ce/0xea0 kernel/time/hrtimer.c:1583
 hrtimer_interrupt+0x334/0x940 kernel/time/hrtimer.c:1645
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline]
 __sysvec_apic_timer_interrupt+0x146/0x540 arch/x86/kernel/apic/apic.c:1097
 run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:91 [inline]
 sysvec_apic_timer_interrupt+0x48/0x100 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:631
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/irqflags.h:85 [inline]
RIP: 0010:lock_acquire kernel/locking/lockdep.c:5438 [inline]
RIP: 0010:lock_acquire+0x2cd/0x8c0 kernel/locking/lockdep.c:5400
Code: 48 c7 c7 c0 5e 4b 89 48 83 c4 20 e8 dd 68 8f 07 b8 ff ff ff ff 65 0f c1 05 c0 b2 ab 7e 83 f8 01 0f 85 09 04 00 00 ff 34 24 9d <e9> 37 fe ff ff 65 ff 05 67 a1 ab 7e 48 8b 05 a0 ab 82 0b e8 6b 5d
RSP: 0018:ffffc90000d90c18 EFLAGS: 00000246
RAX: 0000000000000001 RBX: 1ffff920001b2185 RCX: ffffffff8155f384
RDX: 1ffff1100362daf9 RSI: 0000000000000101 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8ebb1737
R10: fffffbfff1d762e6 R11: 0000000000000000 R12: 0000000000000000
R13: ffff88802c399078 R14: 0000000000000000 R15: 0000000000000000
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
 spin_lock include/linux/spinlock.h:354 [inline]
 garp_join_timer+0x20/0xf0 net/802/garp.c:405
 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1410
 expire_timers kernel/time/timer.c:1455 [inline]
 __run_timers.part.0+0x67c/0xa50 kernel/time/timer.c:1747
 __run_timers kernel/time/timer.c:1728 [inline]
 run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1760
 __do_softirq+0x2a0/0x9f6 kernel/softirq.c:298
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0xaa/0xd0 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:393 [inline]
 __irq_exit_rcu kernel/softirq.c:423 [inline]
 irq_exit_rcu+0x132/0x200 kernel/softirq.c:435
 sysvec_apic_timer_interrupt+0x4d/0x100 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:631
RIP: 0010:tomoyo_domain_quota_is_ok+0x17d/0x550 security/tomoyo/util.c:1054
Code: 39 32 f0 fd 48 8d 7d 18 48 89 f8 48 89 fa 48 c1 e8 03 83 e2 07 42 0f b6 04 30 38 d0 7f 08 84 c0 0f 85 4a 03 00 00 0f b6 5d 18 <31> ff 89 de e8 1a 2a f0 fd 84 db 0f 85 65 ff ff ff e8 fd 31 f0 fd
RSP: 0018:ffffc900185577a8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc9000aafc000
RDX: 0000000000000000 RSI: ffffffff837ffd97 RDI: ffff88802039f798
RBP: ffff88802039f780 R08: 0000000000000001 R09: ffffffff8f07ab47
R10: 0000000000000010 R11: 0000000000000000 R12: 0000000000000002
R13: 0000000000000120 R14: dffffc0000000000 R15: 0000000000000000
 tomoyo_supervisor+0x2f2/0xef0 security/tomoyo/common.c:2089
 tomoyo_audit_net_log security/tomoyo/network.c:367 [inline]
 tomoyo_audit_inet_log+0x26b/0x370 security/tomoyo/network.c:393
 tomoyo_inet_entry security/tomoyo/network.c:484 [inline]
 tomoyo_check_inet_address+0x5db/0x710 security/tomoyo/network.c:532
 tomoyo_socket_sendmsg_permission+0x24b/0x340 security/tomoyo/network.c:774
 security_socket_sendmsg+0x50/0xb0 security/security.c:2140
 sock_sendmsg+0x3f/0x120 net/socket.c:668
 __sys_sendto+0x21c/0x320 net/socket.c:1992
 __do_sys_sendto net/socket.c:2004 [inline]
 __se_sys_sendto net/socket.c:2000 [inline]
 __x64_sys_sendto+0xdd/0x1b0 net/socket.c:2000
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45deb9
Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fc818ad6c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 000000000002e900 RCX: 000000000045deb9
RDX: 000000000000fe7a RSI: 0000000020000080 RDI: 0000000000000003
RBP: 000000000118bf78 R08: 00000000200001c0 R09: 0000000000000010
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c
R13: 000000000169fb7f R14: 00007fc818ad79c0 R15: 000000000118bf2c

Crashes (13):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Maintainers
ci-upstream-kasan-gce	2020/11/22 15:45	upstream	a349e4c6	0d27f508	.config	log	report	info	fweisbec@gmail.com, linux-kernel@vger.kernel.org, mingo@kernel.org, tglx@linutronix.de
ci-upstream-kasan-gce	2020/08/27 13:58	upstream	15bc20c6	816e0689	.config	log	report		fweisbec@gmail.com, linux-kernel@vger.kernel.org, mingo@kernel.org, tglx@linutronix.de
ci-upstream-kasan-gce-root	2020/08/25 19:12	upstream	6a9dc5fd	344da168	.config	log	report		fweisbec@gmail.com, linux-kernel@vger.kernel.org, mingo@kernel.org, tglx@linutronix.de
ci-upstream-kasan-gce-smack-root	2020/08/24 09:07	upstream	cb957121	cef5ae68	.config	log	report		fweisbec@gmail.com, linux-kernel@vger.kernel.org, mingo@kernel.org, tglx@linutronix.de
ci-upstream-kasan-gce-smack-root	2020/08/01 23:20	upstream	7dc6fd0f	d895b3be	.config	log	report		fweisbec@gmail.com, linux-kernel@vger.kernel.org, mingo@kernel.org, tglx@linutronix.de
ci-upstream-kasan-gce-selinux-root	2020/07/29 08:52	upstream	6ba1b005	cb93dc6a	.config	log	report		fweisbec@gmail.com, linux-kernel@vger.kernel.org, mingo@kernel.org, tglx@linutronix.de
ci-upstream-kasan-gce-smack-root	2020/06/08 09:42	upstream	7ae77150	7751efd0	.config	log	report		allison@lohutok.net, davem@davemloft.net, gregkh@linuxfoundation.org, info@metux.net, kstewart@linuxfoundation.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tglx@linutronix.de
ci-upstream-kasan-gce	2020/04/16 16:08	upstream	00086336	c743fcb3	.config	log	report		allison@lohutok.net, davem@davemloft.net, gregkh@linuxfoundation.org, info@metux.net, kstewart@linuxfoundation.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tglx@linutronix.de
ci-upstream-kasan-gce-smack-root	2020/02/04 20:01	upstream	322bf2d3	93e5e335	.config	log	report		allison@lohutok.net, davem@davemloft.net, gregkh@linuxfoundation.org, info@metux.net, kstewart@linuxfoundation.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tglx@linutronix.de
ci-upstream-kasan-gce-root	2020/02/04 17:53	upstream	322bf2d3	93e5e335	.config	log	report		allison@lohutok.net, davem@davemloft.net, gregkh@linuxfoundation.org, info@metux.net, kstewart@linuxfoundation.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tglx@linutronix.de
ci-upstream-kasan-gce-386	2020/07/12 01:22	upstream	a581387e	18d18b59	.config	log	report		fweisbec@gmail.com, linux-kernel@vger.kernel.org, mingo@kernel.org, tglx@linutronix.de
ci-upstream-kasan-gce-386	2020/01/09 16:05	upstream	b07f636f	ddc3e859	.config	log	report		allison@lohutok.net, davem@davemloft.net, gregkh@linuxfoundation.org, info@metux.net, kstewart@linuxfoundation.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tglx@linutronix.de
ci-upstream-linux-next-kasan-gce-root	2020/06/30 09:17	linux-next	36e3135d	a2cdad9d	.config	log	report		fweisbec@gmail.com, linux-kernel@vger.kernel.org, mingo@kernel.org, tglx@linutronix.de