INFO: rcu detected stall in addrconf_rs

INFO: rcu detected stall in addrconf_rs_timer (4)
Status: upstream: reported C repro on 2020/08/03 16:25
Reported-by: syzbot+ca2665ae8487c46d365d@syzkaller.appspotmail.com
First crash: 216d, last: 32d

Cause bisection: failed (bisect log)

Fix bisection: failed (bisect log)

similar bugs (6):
Kernel	Title	Repro	Bisected	Count	Last	Reported	Patched	Status
upstream	INFO: rcu detected stall in addrconf_rs_timer (2)			362	362d	384d	14/17	fixed on 2019/10/21 12:31
linux-4.14	INFO: rcu detected stall in addrconf_rs_timer	C	fix	220	25d	388d	0/1	upstream: reported C repro on 2019/09/06 14:33
upstream	INFO: rcu detected stall in addrconf_rs_timer			38	648d	744d	0/17	closed as dup on 2019/01/02 16:33
linux-4.19	INFO: rcu detected stall in addrconf_rs_timer			45	376d	388d	0/1	auto-closed as invalid on 2019/12/17 18:46
upstream	INFO: rcu detected stall in addrconf_rs_timer (3)	C	cause+fix	81	284d	280d	16/17	fixed on 2020/02/18 14:31
linux-4.19	INFO: rcu detected stall in addrconf_rs_timer (2)			5	26d	100d	0/1	upstream: reported on 2020/06/21 03:38

Sample crash report:

rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=6a6/1/0x4000000000000000 softirq=9991/9992 fqs=3087 
	(t=10501 jiffies g=10949 q=35980)
NMI backtrace for cpu 0
CPU: 0 PID: 8132 Comm: syz-executor609 Not tainted 5.9.0-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:77 [inline]
 dump_stack+0x18f/0x20d lib/dump_stack.c:118
 nmi_cpu_backtrace.cold+0x70/0xb1 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1b3/0x223 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x194/0x1cf kernel/rcu/tree_stall.h:318
 print_cpu_stall kernel/rcu/tree_stall.h:551 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:625 [inline]
 rcu_pending kernel/rcu/tree.c:3637 [inline]
 rcu_sched_clock_irq.cold+0x5b3/0xccd kernel/rcu/tree.c:2519
 update_process_times+0x25/0xa0 kernel/time/timer.c:1710
 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:1524 [inline]
 __hrtimer_run_queues+0x1d5/0xfc0 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
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:50 [inline]
 sysvec_apic_timer_interrupt+0x4c/0xf0 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581
RIP: 0010:dst_alloc+0x94/0x641 net/core/dst.c:93
Code: 00 00 e8 4f 08 35 fb 48 8d 7b 78 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 16 05 00 00 48 8b 7b 78 <be> 20 0a 00 00 e8 12 c1 74 fb 48 85 c0 49 89 c4 0f 84 74 04 00 00
RSP: 0018:ffffc900000079b0 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: ffff8880938f0bc0 RCX: ffffffff863f3b13
RDX: 1ffff1101271e187 RSI: ffffffff863f36c1 RDI: ffff88821569af00
RBP: 0000000000000000 R08: 0000000000000000 R09: ffff888091354aa0
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff86ec1bf0
R13: ffff888083f7c000 R14: 0000000000000001 R15: 00000000ffffffff
 ip6_dst_alloc+0x2e/0x100 net/ipv6/route.c:356
 icmp6_dst_alloc+0x6d/0x6c0 net/ipv6/route.c:3166
 ndisc_send_skb+0x1207/0x1720 net/ipv6/ndisc.c:486
 ndisc_send_rs+0x12e/0x700 net/ipv6/ndisc.c:700
 addrconf_rs_timer+0x2ec/0x7c0 net/ipv6/addrconf.c:3873
 call_timer_fn+0x1ac/0x760 kernel/time/timer.c:1413
 expire_timers kernel/time/timer.c:1458 [inline]
 __run_timers.part.0+0x67c/0xaa0 kernel/time/timer.c:1755
 __run_timers kernel/time/timer.c:1736 [inline]
 run_timer_softirq+0xae/0x1a0 kernel/time/timer.c:1768
 __do_softirq+0x2de/0xa24 kernel/softirq.c:298
 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]
 do_softirq_own_stack+0x9d/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+0x1f3/0x230 kernel/softirq.c:435
 sysvec_apic_timer_interrupt+0x51/0xf0 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x4b/0x80 kernel/locking/spinlock.c:199
Code: c0 d8 3b b6 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 31 48 83 3d 46 16 c0 01 00 74 25 fb 66 0f 1f 44 00 00 <bf> 01 00 00 00 e8 db 8d 59 f9 65 8b 05 d4 d8 0b 78 85 c0 74 02 5d
RSP: 0018:ffffc90009e675b0 EFLAGS: 00000286
RAX: 1ffffffff136c77b RBX: ffff8880913541c0 RCX: 1ffffffff1563f41
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffffffff87f6256f
RBP: ffff8880ae635e00 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: ffff8880ae635e00
R13: ffff8880a9630240 R14: 0000000000000000 R15: 0000000000000001
 finish_lock_switch kernel/sched/core.c:3517 [inline]
 finish_task_switch+0x147/0x750 kernel/sched/core.c:3617
 context_switch kernel/sched/core.c:3781 [inline]
 __schedule+0x8ed/0x21e0 kernel/sched/core.c:4527
 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:4683
 preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:40
 __raw_spin_unlock include/linux/spinlock_api_smp.h:152 [inline]
 _raw_spin_unlock+0x36/0x40 kernel/locking/spinlock.c:183
 spin_unlock include/linux/spinlock.h:394 [inline]
 zap_pte_range mm/memory.c:1147 [inline]
 zap_pmd_range mm/memory.c:1195 [inline]
 zap_pud_range mm/memory.c:1224 [inline]
 zap_p4d_range mm/memory.c:1245 [inline]
 unmap_page_range+0x1602/0x2b20 mm/memory.c:1266
 unmap_single_vma+0x198/0x300 mm/memory.c:1311
 unmap_vmas+0x168/0x2e0 mm/memory.c:1343
 exit_mmap+0x2b1/0x530 mm/mmap.c:3183
 __mmput+0x122/0x470 kernel/fork.c:1076
 mmput+0x53/0x60 kernel/fork.c:1097
 exit_mm kernel/exit.c:483 [inline]
 do_exit+0xa8b/0x29f0 kernel/exit.c:793
 do_group_exit+0x125/0x310 kernel/exit.c:903
 get_signal+0x428/0x1f00 kernel/signal.c:2757
 arch_do_signal+0x82/0x2520 arch/x86/kernel/signal.c:811
 exit_to_user_mode_loop kernel/entry/common.c:136 [inline]
 exit_to_user_mode_prepare+0x15d/0x1c0 kernel/entry/common.c:167
 syscall_exit_to_user_mode+0x59/0x2b0 kernel/entry/common.c:242
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x444499
Code: Bad RIP value.
RSP: 002b:00007ffe8843c418 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: 0000000000000004 RBX: 0000000000000003 RCX: 0000000000444499
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000040
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000400326777
R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000002
R13: 0000000000405190 R14: 0000000000000000 R15: 0000000000000000

Crashes (40):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	Maintainers
ci-upstream-kasan-gce-root	2020/08/27 11:13	upstream	15bc20c6	816e0689	.config	log	report	syz	C	fweisbec@gmail.com, linux-kernel@vger.kernel.org, mingo@kernel.org, tglx@linutronix.de
ci-upstream-kasan-gce-smack-root	2020/07/04 04:30	upstream	7cc2a8ea	51095195	.config	log	report	syz	C	fweisbec@gmail.com, linux-kernel@vger.kernel.org, mingo@kernel.org, tglx@linutronix.de
ci-upstream-kasan-gce-smack-root	2020/03/11 05:30	upstream	e9414845	35f53e45	.config	log	report	syz	C	bp@alien8.de, hpa@zytor.com, jpoimboe@redhat.com, linux-kernel@vger.kernel.org, mingo@redhat.com, peterz@infradead.org, shile.zhang@linux.alibaba.com, tglx@linutronix.de, x86@kernel.org
ci-upstream-kasan-gce-smack-root	2020/03/10 22:53	upstream	30bb5572	35f53e45	.config	log	report	syz		davem@davemloft.net, kuba@kernel.org, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci-upstream-kasan-gce-smack-root	2020/03/08 17:56	upstream	61a09258	2e9971bb	.config	log	report	syz		davem@davemloft.net, kuba@kernel.org, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci-upstream-kasan-gce-smack-root	2020/08/05 17:32	upstream	442489c2	b7129355	.config	log	report			fweisbec@gmail.com, linux-kernel@vger.kernel.org, mingo@kernel.org, tglx@linutronix.de
ci-upstream-kasan-gce-smack-root	2020/08/03 04:19	upstream	5a30a789	196277c4	.config	log	report			fweisbec@gmail.com, linux-kernel@vger.kernel.org, mingo@kernel.org, tglx@linutronix.de
ci-upstream-kasan-gce-smack-root	2020/07/26 10:46	upstream	04300d66	1f7cc1ca	.config	log	report			fweisbec@gmail.com, linux-kernel@vger.kernel.org, mingo@kernel.org, tglx@linutronix.de
ci-upstream-kasan-gce-smack-root	2020/07/19 05:58	upstream	f932d58a	9c812472	.config	log	report			fweisbec@gmail.com, linux-kernel@vger.kernel.org, mingo@kernel.org, tglx@linutronix.de
ci-upstream-kasan-gce-smack-root	2020/07/17 14:54	upstream	88825726	9c812472	.config	log	report			fweisbec@gmail.com, linux-kernel@vger.kernel.org, mingo@kernel.org, tglx@linutronix.de
ci-upstream-kasan-gce-smack-root	2020/07/10 08:19	upstream	42f82040	edf162e8	.config	log	report			fweisbec@gmail.com, linux-kernel@vger.kernel.org, mingo@kernel.org, tglx@linutronix.de
ci-upstream-kasan-gce-smack-root	2020/07/04 06:01	upstream	7cc2a8ea	51095195	.config	log	report			fweisbec@gmail.com, linux-kernel@vger.kernel.org, mingo@kernel.org, tglx@linutronix.de
ci-upstream-kasan-gce-smack-root	2020/05/11 10:58	upstream	2ef96a5b	f8f57555	.config	log	report			bp@alien8.de, hpa@zytor.com, jpoimboe@redhat.com, linux-kernel@vger.kernel.org, mbenes@suse.cz, mingo@redhat.com, peterz@infradead.org, shile.zhang@linux.alibaba.com, tglx@linutronix.de, x86@kernel.org
ci-upstream-kasan-gce	2020/04/26 07:28	upstream	b2768df2	99b258dd	.config	log	report			davem@davemloft.net, jhs@mojatatu.com, jiri@resnulli.us, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, xiyou.wangcong@gmail.com
ci-upstream-kasan-gce-smack-root	2020/03/29 12:10	upstream	906c4043	05736b29	.config	log	report			Jason@zx2c4.com, davem@davemloft.net, gregkh@linuxfoundation.org, kuba@kernel.org, linux-kernel@vger.kernel.org, maheshb@google.com, netdev@vger.kernel.org, tglx@linutronix.de
ci-upstream-kasan-gce-smack-root	2020/03/24 10:51	upstream	979e52ca	33e14df3	.config	log	report			davem@davemloft.net, dsahern@gmail.com, edumazet@google.com, johannes.berg@intel.com, kuba@kernel.org, linux-kernel@vger.kernel.org, mcroce@redhat.com, netdev@vger.kernel.org
ci-upstream-kasan-gce-smack-root	2020/03/23 12:42	upstream	67d584e3	78267cec	.config	log	report			bp@alien8.de, hpa@zytor.com, jpoimboe@redhat.com, linux-kernel@vger.kernel.org, mingo@redhat.com, peterz@infradead.org, shile.zhang@linux.alibaba.com, tglx@linutronix.de, x86@kernel.org
ci-upstream-kasan-gce-smack-root	2020/03/23 04:39	upstream	67d584e3	78267cec	.config	log	report			bp@alien8.de, hpa@zytor.com, jpoimboe@redhat.com, linux-kernel@vger.kernel.org, mingo@redhat.com, peterz@infradead.org, shile.zhang@linux.alibaba.com, tglx@linutronix.de, x86@kernel.org
ci-upstream-kasan-gce-smack-root	2020/03/20 21:51	upstream	6c90b86a	2c31c529	.config	log	report			bp@alien8.de, hpa@zytor.com, jpoimboe@redhat.com, linux-kernel@vger.kernel.org, mingo@redhat.com, peterz@infradead.org, shile.zhang@linux.alibaba.com, tglx@linutronix.de, x86@kernel.org
ci-upstream-kasan-gce-smack-root	2020/03/20 20:40	upstream	6c90b86a	2c31c529	.config	log	report			bp@alien8.de, hpa@zytor.com, jpoimboe@redhat.com, linux-kernel@vger.kernel.org, mingo@redhat.com, peterz@infradead.org, shile.zhang@linux.alibaba.com, tglx@linutronix.de, x86@kernel.org
ci-upstream-kasan-gce-smack-root	2020/03/17 13:52	upstream	fb33c651	749688d2	.config	log	report			ap420073@gmail.com, davem@davemloft.net, edumazet@google.com, gustavo@embeddedor.com, linux-kernel@vger.kernel.org, liuhangbin@gmail.com, netdev@vger.kernel.org, richardcochran@gmail.com, tglx@linutronix.de
ci-upstream-kasan-gce-smack-root	2020/03/15 15:12	upstream	d3dca690	749688d2	.config	log	report			andriin@fb.com, ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, davem@davemloft.net, kafai@fb.com, kuba@kernel.org, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, songliubraving@fb.com, yhs@fb.com, yoshfuji@linux-ipv6.org
ci-upstream-kasan-gce-smack-root	2020/03/14 17:06	upstream	fffb08b3	749688d2	.config	log	report			Jason@zx2c4.com, davem@davemloft.net, jwi@linux.ibm.com, kuba@kernel.org, linux-kernel@vger.kernel.org, maheshb@google.com, netdev@vger.kernel.org, tglx@linutronix.de
ci-upstream-kasan-gce-smack-root	2020/03/14 16:46	upstream	fffb08b3	749688d2	.config	log	report			bp@alien8.de, hpa@zytor.com, jpoimboe@redhat.com, linux-kernel@vger.kernel.org, mingo@redhat.com, peterz@infradead.org, shile.zhang@linux.alibaba.com, tglx@linutronix.de, x86@kernel.org
ci-upstream-kasan-gce-smack-root	2020/03/14 15:34	upstream	fffb08b3	749688d2	.config	log	report			davem@davemloft.net, kuba@kernel.org, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci-upstream-kasan-gce-smack-root	2020/03/14 15:00	upstream	fffb08b3	749688d2	.config	log	report			bp@alien8.de, hpa@zytor.com, jpoimboe@redhat.com, linux-kernel@vger.kernel.org, mingo@redhat.com, peterz@infradead.org, shile.zhang@linux.alibaba.com, tglx@linutronix.de, x86@kernel.org
ci-upstream-kasan-gce-smack-root	2020/03/14 14:45	upstream	fffb08b3	749688d2	.config	log	report			bp@alien8.de, hpa@zytor.com, jpoimboe@redhat.com, linux-kernel@vger.kernel.org, mingo@redhat.com, peterz@infradead.org, shile.zhang@linux.alibaba.com, tglx@linutronix.de, x86@kernel.org
ci-upstream-kasan-gce-root	2020/03/13 21:42	upstream	3cc6e2c5	d850e9d0	.config	log	report			jpoimboe@redhat.com, jslaby@suse.cz, kamalesh@linux.vnet.ibm.com, linux-kernel@vger.kernel.org, mbenes@suse.cz, mingo@kernel.org, tglx@linutronix.de
ci-upstream-kasan-gce-smack-root	2020/03/13 16:36	upstream	3cc6e2c5	d850e9d0	.config	log	report			bp@alien8.de, hpa@zytor.com, jpoimboe@redhat.com, linux-kernel@vger.kernel.org, mingo@redhat.com, peterz@infradead.org, shile.zhang@linux.alibaba.com, tglx@linutronix.de, x86@kernel.org
ci-upstream-kasan-gce-smack-root	2020/03/13 04:40	upstream	3cc6e2c5	d850e9d0	.config	log	report			coreteam@netfilter.org, davem@davemloft.net, fw@strlen.de, kadlec@netfilter.org, kuba@kernel.org, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, netfilter-devel@vger.kernel.org, pablo@netfilter.org, yoshfuji@linux-ipv6.org
ci-upstream-kasan-gce-smack-root	2020/03/11 01:51	upstream	e9414845	35f53e45	.config	log	report			davem@davemloft.net, kuba@kernel.org, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci-upstream-kasan-gce-smack-root	2020/03/10 19:57	upstream	30bb5572	35f53e45	.config	log	report			andriin@fb.com, ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, davem@davemloft.net, kafai@fb.com, kuba@kernel.org, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, songliubraving@fb.com, yhs@fb.com, yoshfuji@linux-ipv6.org
ci-upstream-kasan-gce-smack-root	2020/03/10 19:22	upstream	30bb5572	35f53e45	.config	log	report			daniel@iogearbox.net, davem@davemloft.net, edumazet@google.com, hkallweit1@gmail.com, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, olteanv@gmail.com, sdf@google.com
ci-upstream-kasan-gce-smack-root	2020/03/10 12:34	upstream	30bb5572	35f53e45	.config	log	report			andriin@fb.com, ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, davem@davemloft.net, hawk@kernel.org, john.fastabend@gmail.com, kafai@fb.com, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, songliubraving@fb.com, yhs@fb.com
ci-upstream-kasan-gce-smack-root	2020/03/10 04:04	upstream	30bb5572	35f53e45	.config	log	report			jpoimboe@redhat.com, jslaby@suse.cz, linux-kernel@vger.kernel.org, mbenes@suse.cz, mingo@kernel.org, peterz@infradead.org, tglx@linutronix.de
ci-upstream-kasan-gce-smack-root	2020/03/08 14:18	upstream	61a09258	2e9971bb	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, moshe@mellanox.com, netdev@vger.kernel.org, sd@queasysnail.net, tglx@linutronix.de
ci-upstream-kasan-gce-smack-root	2020/03/08 13:02	upstream	61a09258	2e9971bb	.config	log	report			bp@alien8.de, devel@etsukata.com, hpa@zytor.com, jpoimboe@redhat.com, linux-kernel@vger.kernel.org, mingo@redhat.com, peterz@infradead.org, tglx@linutronix.de, x86@kernel.org
ci-upstream-kasan-gce-smack-root	2020/02/26 03:07	upstream	f8788d86	59b57593	.config	log	report			bp@alien8.de, gregkh@linuxfoundation.org, hpa@zytor.com, jannh@google.com, jpoimboe@redhat.com, linux-kernel@vger.kernel.org, mhiramat@kernel.org, mingo@redhat.com, peterz@infradead.org, tglx@linutronix.de, x86@kernel.org
ci-upstream-bpf-next-kasan-gce	2020/03/28 14:27	bpf-next	2cf69d3f	f1ebdfba	.config	log	report			davem@davemloft.net, kuba@kernel.org, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci-upstream-linux-next-kasan-gce-root	2020/03/20 04:06	linux-next	770fbb32	2c31c529	.config	log	report			davem@davemloft.net, edumazet@google.com, jwi@linux.ibm.com, linux-kernel@vger.kernel.org, maheshb@google.com, netdev@vger.kernel.org