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: 565d, last: 23d

similar bugs (6):
Kernel	Title	Count	Last	Reported	Patched	Status
linux-4.19	INFO: rcu detected stall in garp_join_timer	7	535d	567d	0/1	auto-closed as invalid on 2020/06/07 13:30
upstream	INFO: rcu detected stall in garp_join_timer	1	607d	607d	0/22	closed as invalid on 2019/11/29 14:24
linux-4.14	INFO: rcu detected stall in garp_join_timer	4	531d	546d	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	403d	403d	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	195d	195d	0/1	auto-closed as invalid on 2021/05/13 13:34
linux-4.19	BUG: soft lockup in garp_join_timer	2	16d	47d	0/1	upstream: reported on 2021/06/11 07:01

Sample crash report:

rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (1 GPs behind) idle=94a/1/0x4000000000000000 softirq=97492/97493 fqs=12 
	(t=10501 jiffies g=120113 q=723)
rcu: rcu_preempt kthread starved for 10471 jiffies! g120113 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
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:I stack:28816 pid:   14 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4683 [inline]
 __schedule+0x934/0x2710 kernel/sched/core.c:5940
 schedule+0xd3/0x270 kernel/sched/core.c:6019
 schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1892
 rcu_gp_fqs_loop kernel/rcu/tree.c:2004 [inline]
 rcu_gp_kthread+0xd1a/0x2300 kernel/rcu/tree.c:2177
 kthread+0x3e5/0x4d0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 19 Comm: ksoftirqd/1 Not tainted 5.13.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:unwind_next_frame+0x27/0x1ce0 arch/x86/kernel/unwind_orc.c:418
Code: 0f 1f 00 48 b8 00 00 00 00 00 fc ff df 41 57 41 56 49 89 fe 41 55 41 54 55 53 48 81 ec a0 00 00 00 48 c7 44 24 40 b3 8a b5 41 <48> 8d 5c 24 40 48 c7 44 24 48 09 a2 11 8b 48 c1 eb 03 48 c7 44 24
RSP: 0018:ffffc90000d97670 EFLAGS: 00000282
RAX: dffffc0000000000 RBX: ffffffff8163fc70 RCX: 0000000000000000
RDX: 1ffff920001b2f0e RSI: ffffffff81bb28ab RDI: ffffc90000d97748
RBP: ffffc90000d977d0 R08: ffffffff8e68ea70 R09: 0000000000000001
R10: fffff520001b2ef4 R11: 0000000000086088 R12: ffffc90000d97800
R13: 0000000000000000 R14: ffffc90000d97748 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000700 CR3: 0000000017846000 CR4: 0000000000350ee0
Call Trace:
 arch_stack_walk+0x7d/0xe0 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
 kasan_set_track+0x1c/0x30 mm/kasan/common.c:46
 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:360
 ____kasan_slab_free mm/kasan/common.c:366 [inline]
 ____kasan_slab_free mm/kasan/common.c:328 [inline]
 __kasan_slab_free+0xfb/0x130 mm/kasan/common.c:374
 kasan_slab_free include/linux/kasan.h:229 [inline]
 slab_free_hook mm/slub.c:1639 [inline]
 slab_free_freelist_hook+0xdf/0x240 mm/slub.c:1664
 slab_free mm/slub.c:3224 [inline]
 kmem_cache_free+0x8e/0x5a0 mm/slub.c:3240
 kfree_skbmem+0xef/0x1b0 net/core/skbuff.c:688
 __kfree_skb net/core/skbuff.c:745 [inline]
 consume_skb net/core/skbuff.c:900 [inline]
 consume_skb+0xcf/0x160 net/core/skbuff.c:894
 mac80211_hwsim_tx_frame+0x1f6/0x2a0 drivers/net/wireless/mac80211_hwsim.c:1785
 mac80211_hwsim_beacon_tx+0x4b7/0x920 drivers/net/wireless/mac80211_hwsim.c:1838
 __iterate_interfaces+0x1e5/0x520 net/mac80211/util.c:793
 ieee80211_iterate_active_interfaces_atomic+0x8d/0x170 net/mac80211/util.c:829
 mac80211_hwsim_beacon+0xd5/0x1a0 drivers/net/wireless/mac80211_hwsim.c:1861
 __run_hrtimer kernel/time/hrtimer.c:1537 [inline]
 __hrtimer_run_queues+0x609/0xe40 kernel/time/hrtimer.c:1601
 hrtimer_run_softirq+0x17b/0x360 kernel/time/hrtimer.c:1618
 __do_softirq+0x29b/0x9bd kernel/softirq.c:558
 run_ksoftirqd kernel/softirq.c:920 [inline]
 run_ksoftirqd+0x2d/0x60 kernel/softirq.c:912
 smpboot_thread_fn+0x645/0x9c0 kernel/smpboot.c:164
 kthread+0x3e5/0x4d0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
NMI backtrace for cpu 0
CPU: 0 PID: 27213 Comm: syz-executor.2 Not tainted 5.13.0-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:79 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:96
 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+0x25e/0x3f0 kernel/rcu/tree_stall.h:341
 print_cpu_stall kernel/rcu/tree_stall.h:624 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:699 [inline]
 rcu_pending kernel/rcu/tree.c:3911 [inline]
 rcu_sched_clock_irq.cold+0x9f/0x747 kernel/rcu/tree.c:2649
 update_process_times+0x16d/0x200 kernel/time/timer.c:1796
 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226
 tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1421
 __run_hrtimer kernel/time/hrtimer.c:1537 [inline]
 __hrtimer_run_queues+0x1c0/0xe40 kernel/time/hrtimer.c:1601
 hrtimer_interrupt+0x330/0xa00 kernel/time/hrtimer.c:1663
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline]
 __sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1106
 sysvec_apic_timer_interrupt+0x40/0xc0 arch/x86/kernel/apic/apic.c:1100
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:debug_lockdep_rcu_enabled+0x6/0x30 kernel/rcu/update.c:280
Code: 0f 1f 40 00 0f 1f 44 00 00 65 81 05 00 ad e0 76 00 00 00 f0 c3 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 8b 05 76 e5 c9 04 <85> c0 74 21 8b 05 ac 17 ca 04 85 c0 74 17 65 48 8b 04 25 00 f0 01
RSP: 0018:ffffc90000007c18 EFLAGS: 00000246
RAX: 0000000000000002 RBX: 0000000000000000 RCX: ffffffff815b1071
RDX: fffffbfff1bd6a43 RSI: 0000000000000008 RDI: ffffffff8deb5210
RBP: 1ffff92000000f88 R08: 0000000000000000 R09: ffffffff8deb5217
R10: fffffbfff1bd6a42 R11: 0000000000000000 R12: 0000000000000001
R13: ffff888091647c60 R14: ffffffff872e9aa0 R15: 0000000000000000
 rcu_read_lock_held_common kernel/rcu/update.c:104 [inline]
 rcu_read_lock_sched_held+0xd/0x70 kernel/rcu/update.c:123
 trace_lock_release include/trace/events/lock.h:58 [inline]
 lock_release+0x5d3/0x720 kernel/locking/lockdep.c:5636
 __raw_spin_unlock include/linux/spinlock_api_smp.h:150 [inline]
 _raw_spin_unlock+0x12/0x40 kernel/locking/spinlock.c:183
 spin_unlock include/linux/spinlock.h:394 [inline]
 garp_join_timer+0xaa/0xf0 net/802/garp.c:408
 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1431
 expire_timers kernel/time/timer.c:1476 [inline]
 __run_timers.part.0+0x675/0xa50 kernel/time/timer.c:1745
 __run_timers kernel/time/timer.c:1726 [inline]
 run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1758
 __do_softirq+0x29b/0x9bd kernel/softirq.c:558
 invoke_softirq kernel/softirq.c:432 [inline]
 __irq_exit_rcu+0x16e/0x1c0 kernel/softirq.c:636
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1100
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__rcu_read_unlock+0xa2/0x520 kernel/rcu/tree_plugin.h:465
Code: 00 85 c0 75 53 65 48 8b 2c 25 00 f0 01 00 48 8d bd cc 03 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 <48> 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 4f 01 00 00 81
RSP: 0018:ffffc9000a217c18 EFLAGS: 00000213
RAX: dffffc0000000000 RBX: ffffc9000a217d80 RCX: ffffc9000df06000
RDX: 0000000000000000 RSI: ffffffff88963a7d RDI: ffff88802eeb200c
RBP: ffff88802eeb1c40 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff88963bd6 R11: 0000000000000000 R12: ffff88803a31c000
R13: ffff88801cf42800 R14: ffffc9000a217d80 R15: ffff8880b2a42e00
 rcu_read_unlock include/linux/rcupdate.h:724 [inline]
 net_generic include/net/netns/generic.h:47 [inline]
 tipc_net net/tipc/core.h:152 [inline]
 tipc_name_table net/tipc/core.h:167 [inline]
 tipc_service_find+0x172/0x3f0 net/tipc/name_table.c:464
 tipc_nametbl_build_group+0x8f/0x3b0 net/tipc/name_table.c:739
 tipc_sk_join net/tipc/socket.c:3065 [inline]
 tipc_setsockopt+0x5e9/0xe70 net/tipc/socket.c:3173
 __sys_setsockopt+0x2db/0x610 net/socket.c:2152
 __do_sys_setsockopt net/socket.c:2163 [inline]
 __se_sys_setsockopt net/socket.c:2160 [inline]
 __x64_sys_setsockopt+0xba/0x150 net/socket.c:2160
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665d9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f246239c188 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9
RDX: 0000000000000087 RSI: 000000000000010f RDI: 0000000000000006
RBP: 00000000004bfcb9 R08: 0000000000000010 R09: 0000000000000000
R10: 00000000200002c0 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffd27f0e81f R14: 00007f246239c300 R15: 0000000000022000

Crashes (16):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci-upstream-kasan-gce-root	2021/07/04 21:31	upstream	3dbdb38e2869	55aa55c2	.config	log	report	info	INFO: rcu detected stall in garp_join_timer
ci-upstream-kasan-gce	2021/02/01 00:09	upstream	6642d600b541	fc9fd31e	.config	log	report	info	INFO: rcu detected stall in garp_join_timer
ci-upstream-net-kasan-gce	2021/05/11 00:48	net-next	48de7c0c1c92	ca873091	.config	log	report	info	INFO: rcu detected stall in garp_join_timer
ci-upstream-kasan-gce	2020/11/22 15:45	upstream	a349e4c65960	0d27f508	.config	log	report	info
ci-upstream-kasan-gce	2020/08/27 13:58	upstream	15bc20c6af4c	816e0689	.config	log	report
ci-upstream-kasan-gce-root	2020/08/25 19:12	upstream	6a9dc5fd6170	344da168	.config	log	report
ci-upstream-kasan-gce-smack-root	2020/08/24 09:07	upstream	cb95712138ec	cef5ae68	.config	log	report
ci-upstream-kasan-gce-smack-root	2020/08/01 23:20	upstream	7dc6fd0f3b84	d895b3be	.config	log	report
ci-upstream-kasan-gce-selinux-root	2020/07/29 08:52	upstream	6ba1b005ffc3	cb93dc6a	.config	log	report
ci-upstream-kasan-gce-smack-root	2020/06/08 09:42	upstream	7ae77150d94d	7751efd0	.config	log	report
ci-upstream-kasan-gce	2020/04/16 16:08	upstream	00086336a8d9	c743fcb3	.config	log	report
ci-upstream-kasan-gce-smack-root	2020/02/04 20:01	upstream	322bf2d3446a	93e5e335	.config	log	report
ci-upstream-kasan-gce-root	2020/02/04 17:53	upstream	322bf2d3446a	93e5e335	.config	log	report
ci-upstream-kasan-gce-386	2020/07/12 01:22	upstream	a581387e415b	18d18b59	.config	log	report
ci-upstream-kasan-gce-386	2020/01/09 16:05	upstream	b07f636fca1c	ddc3e859	.config	log	report
ci-upstream-linux-next-kasan-gce-root	2020/06/30 09:17	linux-next	36e3135df4d4	a2cdad9d	.config	log	report