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: 214d, last: 8d23h

similar bugs (4):
Kernel	Title	Count	Last	Reported	Patched	Status
linux-4.19	INFO: rcu detected stall in garp_join_timer	7	184d	215d	0/1	auto-closed as invalid on 2020/06/07 13:30
upstream	INFO: rcu detected stall in garp_join_timer	1	255d	255d	0/17	closed as invalid on 2019/11/29 14:24
linux-4.14	INFO: rcu detected stall in garp_join_timer	4	179d	194d	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	51d	51d	0/1	upstream: reported on 2020/06/20 11:34

Sample crash report:

rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=a4a/1/0x4000000000000000 softirq=203294/203295 fqs=5186 
	(t=10501 jiffies g=356973 q=5468)
NMI backtrace for cpu 0
CPU: 0 PID: 15834 Comm: syz-executor.0 Not tainted 5.8.0-rc7-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+0x1f0/0x31e lib/dump_stack.c:118
 nmi_cpu_backtrace+0x9f/0x180 lib/nmi_backtrace.c:101
 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+0x199/0x2a0 kernel/rcu/tree_stall.h:320
 print_cpu_stall kernel/rcu/tree_stall.h:553 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:627 [inline]
 rcu_pending kernel/rcu/tree.c:3489 [inline]
 rcu_sched_clock_irq+0x1928/0x1eb0 kernel/rcu/tree.c:2504
 update_process_times+0x130/0x1b0 kernel/time/timer.c:1738
 tick_sched_handle kernel/time/tick-sched.c:176 [inline]
 tick_sched_timer+0x254/0x410 kernel/time/tick-sched.c:1320
 __run_hrtimer kernel/time/hrtimer.c:1520 [inline]
 __hrtimer_run_queues+0x42d/0x930 kernel/time/hrtimer.c:1584
 hrtimer_interrupt+0x373/0xd60 kernel/time/hrtimer.c:1646
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline]
 __sysvec_apic_timer_interrupt+0xf0/0x260 arch/x86/kernel/apic/apic.c:1097
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:50 [inline]
 sysvec_apic_timer_interrupt+0x112/0x130 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:585
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:770 [inline]
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xa5/0xd0 kernel/locking/spinlock.c:191
Code: b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 0c 48 c7 c7 f8 c7 4b 89 e8 7a b1 90 f9 48 83 3d 1a d8 28 01 00 74 2c 4c 89 f7 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 2c a9 2d f9 65 8b 05 11 0e df 77
RSP: 0018:ffffc90000007d40 EFLAGS: 00000282
RAX: 1ffffffff12978ff RBX: ffff8880470084b8 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000282
RBP: 0000000000000282 R08: dffffc0000000000 R09: fffffbfff1675cb7
R10: fffffbfff1675cb7 R11: 0000000000000000 R12: 0000000000000000
R13: dffffc0000000000 R14: 0000000000000282 R15: ffff8880470084b8
 spin_unlock_irqrestore include/linux/spinlock.h:408 [inline]
 skb_dequeue+0x10e/0x140 net/core/skbuff.c:3040
 garp_queue_xmit net/802/garp.c:258 [inline]
 garp_join_timer+0x95/0x130 net/802/garp.c:410
 call_timer_fn+0x91/0x160 kernel/time/timer.c:1416
 expire_timers kernel/time/timer.c:1461 [inline]
 __run_timers+0x736/0x930 kernel/time/timer.c:1792
 run_timer_softirq+0x46/0x80 kernel/time/timer.c:1805
 __do_softirq+0x268/0x80c kernel/softirq.c:292
 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:711
 </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]
 do_softirq_own_stack+0xe0/0x1a0 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:387 [inline]
 __irq_exit_rcu+0x1e1/0x1f0 kernel/softirq.c:417
 irq_exit_rcu+0x6/0x50 kernel/softirq.c:429
 sysvec_apic_timer_interrupt+0x117/0x130 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:585
RIP: 0010:memset_erms+0x9/0x10 arch/x86/lib/memset_64.S:66
Code: c1 e9 03 40 0f b6 f6 48 b8 01 01 01 01 01 01 01 01 48 0f af c6 f3 48 ab 89 d1 f3 aa 4c 89 c8 c3 90 49 89 f9 40 88 f0 48 89 d1 <f3> aa 4c 89 c8 c3 90 49 89 fa 40 0f b6 ce 48 b8 01 01 01 01 01 01
RSP: 0018:ffffc90016547258 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffffed1040ead400 RCX: 0000000000000180
RDX: 0000000000000200 RSI: 0000000000000000 RDI: ffffed1040ead280
RBP: 1ffffd400103ab4e R08: dffffc0000000000 R09: ffffed1040ead200
R10: fffff9400103ab4f R11: 0000000000000000 R12: 0000000000000000
R13: dffffc0000000000 R14: 0000000000001000 R15: 0000000000000801
 kasan_poison_shadow mm/kasan/common.c:130 [inline]
 kasan_unpoison_shadow mm/kasan/common.c:144 [inline]
 kasan_alloc_pages+0x4a/0x60 mm/kasan/common.c:209
 post_alloc_hook mm/page_alloc.c:2216 [inline]
 prep_new_page+0xe2/0x2e0 mm/page_alloc.c:2224
 get_page_from_freelist+0x818/0xa90 mm/page_alloc.c:3794
 __alloc_pages_nodemask+0x27e/0x5e0 mm/page_alloc.c:4844
 __alloc_pages include/linux/gfp.h:509 [inline]
 __alloc_pages_node include/linux/gfp.h:522 [inline]
 kmem_getpages+0x49/0x900 mm/slab.c:1367
 cache_grow_begin+0x7b/0x2e0 mm/slab.c:2600
 fallback_alloc+0x135/0x1d0 mm/slab.c:3147
 __do_cache_alloc mm/slab.c:3284 [inline]
 slab_alloc mm/slab.c:3312 [inline]
 kmem_cache_alloc_trace+0x174/0x300 mm/slab.c:3549
 kmalloc include/linux/slab.h:555 [inline]
 kmalloc_array include/linux/slab.h:596 [inline]
 kcalloc include/linux/slab.h:608 [inline]
 func_states_equal kernel/bpf/verifier.c:8181 [inline]
 states_equal+0x1f5/0xab0 kernel/bpf/verifier.c:8226
 is_state_visited kernel/bpf/verifier.c:8431 [inline]
 do_check+0x178d/0x2aa00 kernel/bpf/verifier.c:8647
 do_check_common+0x824/0x19e0 kernel/bpf/verifier.c:10479
 do_check_main kernel/bpf/verifier.c:10545 [inline]
 bpf_check+0xfdc0/0x11670 kernel/bpf/verifier.c:10997
 bpf_prog_load kernel/bpf/syscall.c:2194 [inline]
 __do_sys_bpf+0xfba9/0x10de0 kernel/bpf/syscall.c:4117
 do_syscall_64+0x73/0xe0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45cc79
Code: 2d b6 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 fb b5 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f827af1bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 0000000000001c00 RCX: 000000000045cc79
RDX: 0000000000000048 RSI: 00000000200054c0 RDI: 0000000000000005
RBP: 000000000078bf40 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bf0c
R13: 00007fffb7bf5f6f R14: 00007f827af1c9c0 R15: 000000000078bf0c

Crashes (9):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Maintainers
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