syzbot

 sign-in | mailing list | source | docs
🐞 Open [1491]
≡ Subsystems
🐞 Fixed [6678]
🐞 Invalid [17140]
⬇ Missing Backports [214]
≡ Crashes
Kernel Health Bugs/Month Bug Lifetimes Fuzzing
Total Repo Heatmap Subsystems Heatmap
💬 Send us feedback

INFO: rcu detected stall in igmp_ifc_timer_expire

Status: fixed on 2019/10/09 10:54
Subsystems: net
[Documentation on labels]
Reported-by: syzbot+041483004a7f45f1f20a@syzkaller.appspotmail.com
Fix commit: d4d6ec6dac07 sch_hhf: ensure quantum and hhf_non_hh_weight are non-zero
First crash: 2495d, last: 2232d
▶ ▼ Discussions (10)
Title Replies (including bot) Last reply
[PATCH 3.16 00/83] 3.16.78-rc1 review 88 (88) 2019/11/21 21:42
[PATCH 4.4 00/56] 4.4.194-stable review 62 (62) 2019/09/20 21:38
[PATCH 4.9 00/74] 4.9.194-stable review 80 (80) 2019/09/20 21:28
[PATCH 4.19 00/50] 4.19.74-stable review 62 (62) 2019/09/20 13:56
[PATCH 5.2 00/85] 5.2.16-stable review 94 (94) 2019/09/19 06:37
[PATCH 4.14 00/45] 4.14.145-stable review 51 (51) 2019/09/19 01:26
[Patch net] sch_hhf: ensure quantum and hhf_non_hh_weight are non-zero 2 (2) 2019/09/10 17:31
INFO: rcu detected stall in igmp_ifc_timer_expire 0 (2) 2019/09/07 09:56
Reminder: 26 open syzbot bugs in "net/xfrm" subsystem 1 (1) 2019/07/24 01:42
Reminder: 27 open syzbot bugs in "net/xfrm" subsystem 1 (1) 2019/06/25 05:51
▶ ▼ Similar bugs (1)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: rcu detected stall in igmp_ifc_timer_expire (2) kvm 1 1 1279d 1279d 0/29 auto-closed as invalid on 2022/06/25 04:57

Sample crash report:
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (10500 ticks this GP) idle=092/0/0x3 softirq=11853/11853 fqs=0 
	(t=10500 jiffies g=9697 q=195)
rcu: rcu_preempt kthread starved for 10500 jiffies! g9697 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1
rcu: RCU grace-period kthread stack dump:
rcu_preempt     I29520    10      2 0x80004000
Call Trace:
 context_switch kernel/sched/core.c:3254 [inline]
 __schedule+0x755/0x1580 kernel/sched/core.c:3880
 schedule+0xd9/0x260 kernel/sched/core.c:3947
 schedule_timeout+0x486/0xc50 kernel/time/timer.c:1807
 rcu_gp_fqs_loop kernel/rcu/tree.c:1611 [inline]
 rcu_gp_kthread+0x9b2/0x18c0 kernel/rcu/tree.c:1768
 kthread+0x361/0x430 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
NMI backtrace for cpu 1
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.3.0-rc8+ #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+0x172/0x1f0 lib/dump_stack.c:113
 nmi_cpu_backtrace.cold+0x70/0xb2 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x23b/0x28b lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x183/0x1cf kernel/rcu/tree_stall.h:254
 print_cpu_stall kernel/rcu/tree_stall.h:455 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:529 [inline]
 rcu_pending kernel/rcu/tree.c:2736 [inline]
 rcu_sched_clock_irq.cold+0x4dd/0xc13 kernel/rcu/tree.c:2183
 update_process_times+0x32/0x80 kernel/time/timer.c:1639
 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:167
 tick_sched_timer+0x53/0x140 kernel/time/tick-sched.c:1296
 __run_hrtimer kernel/time/hrtimer.c:1389 [inline]
 __hrtimer_run_queues+0x364/0xe40 kernel/time/hrtimer.c:1451
 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline]
 smp_apic_timer_interrupt+0x160/0x610 arch/x86/kernel/apic/apic.c:1135
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830
RIP: 0010:hhf_dequeue+0x96/0xa20 net/sched/sch_hhf.c:434
Code: 48 39 c6 0f 84 8c 04 00 00 e8 06 0a ac fb 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 0f 85 6d 07 00 00 49 8b 1e 48 8d 7b 10 48 89 f8 <48> c1 e8 03 42 0f b6 04 20 84 c0 74 08 3c 03 0f 8e 69 07 00 00 44
RSP: 0018:ffff8880ae909038 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: ffff88808d1cfe48 RBX: ffff88808d1cfe38 RCX: ffffffff85c670f9
RDX: 0000000000000100 RSI: ffffffff85c66afa RDI: ffff88808d1cfe48
RBP: ffff8880ae909088 R08: ffff8880a98d6340 R09: 0000000000000000
R10: fffffbfff134afaf R11: ffff8880a98d6340 R12: dffffc0000000000
R13: ffff88808d1cfb40 R14: ffff88808d1cfed0 R15: ffff88808d1cfed0
 dequeue_skb net/sched/sch_generic.c:258 [inline]
 qdisc_restart net/sched/sch_generic.c:361 [inline]
 __qdisc_run+0x1e7/0x19d0 net/sched/sch_generic.c:379
 __dev_xmit_skb net/core/dev.c:3533 [inline]
 __dev_queue_xmit+0x16f1/0x3650 net/core/dev.c:3838
 dev_queue_xmit+0x18/0x20 net/core/dev.c:3902
 br_dev_queue_push_xmit+0x3f3/0x5c0 net/bridge/br_forward.c:52
 NF_HOOK include/linux/netfilter.h:305 [inline]
 NF_HOOK include/linux/netfilter.h:299 [inline]
 br_forward_finish+0xfa/0x400 net/bridge/br_forward.c:65
 NF_HOOK include/linux/netfilter.h:305 [inline]
 NF_HOOK include/linux/netfilter.h:299 [inline]
 __br_forward+0x641/0xb00 net/bridge/br_forward.c:109
 deliver_clone+0x61/0xc0 net/bridge/br_forward.c:125
 maybe_deliver+0x2c7/0x390 net/bridge/br_forward.c:181
 br_flood+0x13a/0x3d0 net/bridge/br_forward.c:223
 br_dev_xmit+0x98c/0x15a0 net/bridge/br_device.c:100
 __netdev_start_xmit include/linux/netdevice.h:4406 [inline]
 netdev_start_xmit include/linux/netdevice.h:4420 [inline]
 xmit_one net/core/dev.c:3280 [inline]
 dev_hard_start_xmit+0x1a3/0x9c0 net/core/dev.c:3296
 __dev_queue_xmit+0x2b15/0x3650 net/core/dev.c:3869
 dev_queue_xmit+0x18/0x20 net/core/dev.c:3902
 neigh_hh_output include/net/neighbour.h:500 [inline]
 neigh_output include/net/neighbour.h:509 [inline]
 ip_finish_output2+0x1726/0x2570 net/ipv4/ip_output.c:228
 __ip_finish_output net/ipv4/ip_output.c:308 [inline]
 __ip_finish_output+0x5fc/0xb90 net/ipv4/ip_output.c:290
 ip_finish_output+0x38/0x1f0 net/ipv4/ip_output.c:318
 NF_HOOK_COND include/linux/netfilter.h:294 [inline]
 ip_output+0x21f/0x640 net/ipv4/ip_output.c:432
 dst_output include/net/dst.h:436 [inline]
 ip_local_out+0xbb/0x190 net/ipv4/ip_output.c:125
 igmpv3_sendpack+0x1b5/0x2c0 net/ipv4/igmp.c:426
 igmpv3_send_cr net/ipv4/igmp.c:721 [inline]
 igmp_ifc_timer_expire+0x687/0xa00 net/ipv4/igmp.c:809
 call_timer_fn+0x1ac/0x780 kernel/time/timer.c:1322
 expire_timers kernel/time/timer.c:1366 [inline]
 __run_timers kernel/time/timer.c:1685 [inline]
 __run_timers kernel/time/timer.c:1653 [inline]
 run_timer_softirq+0x697/0x17a0 kernel/time/timer.c:1698
 __do_softirq+0x262/0x98c kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x19b/0x1e0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:537 [inline]
 smp_apic_timer_interrupt+0x1a3/0x610 arch/x86/kernel/apic/apic.c:1137
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830
 </IRQ>
RIP: 0010:native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:61
Code: 88 63 6e fa eb 8a 90 90 90 90 90 90 e9 07 00 00 00 0f 00 2d 24 0b 4a 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 14 0b 4a 00 fb f4 <c3> 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 2e 23 22 fa e8 f9
RSP: 0018:ffff8880a98e7d68 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff11a5e8d RBX: ffff8880a98d6340 RCX: 1ffffffff134b5ee
RDX: dffffc0000000000 RSI: ffffffff8177f15e RDI: ffffffff873e150c
RBP: ffff8880a98e7d98 R08: ffff8880a98d6340 R09: ffffed101531ac69
R10: ffffed101531ac68 R11: ffff8880a98d6347 R12: dffffc0000000000
R13: ffffffff89a57d78 R14: 0000000000000000 R15: 0000000000000001
 arch_cpu_idle+0xa/0x10 arch/x86/kernel/process.c:571
 default_idle_call+0x84/0xb0 kernel/sched/idle.c:94
 cpuidle_idle_call kernel/sched/idle.c:154 [inline]
 do_idle+0x413/0x760 kernel/sched/idle.c:263
 cpu_startup_entry+0x1b/0x20 kernel/sched/idle.c:354
 start_secondary+0x315/0x430 arch/x86/kernel/smpboot.c:264
 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:241

Crashes (57):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/09/14 18:30 upstream a7f89616b737 32d59357 .config console log report syz C ci-upstream-kasan-gce-selinux-root
2019/09/14 11:13 upstream a7f89616b737 32d59357 .config console log report syz C ci-upstream-kasan-gce-root
2019/09/13 15:50 upstream 505a8ec7e11a 40fa42bc .config console log report syz C ci-upstream-kasan-gce-selinux-root
2019/09/13 11:56 upstream 505a8ec7e11a 40fa42bc .config console log report syz C ci-upstream-kasan-gce-smack-root
2019/09/12 23:00 upstream ad32b4800c2b 0b7672ee .config console log report syz C ci-upstream-kasan-gce-selinux-root
2019/09/11 17:20 upstream 3120b9a6a3f7 a60cb4cd .config console log report syz C ci-upstream-kasan-gce-smack-root
2019/09/11 14:51 upstream 3120b9a6a3f7 a60cb4cd .config console log report syz C ci-upstream-kasan-gce-smack-root
2019/09/11 13:55 upstream 3120b9a6a3f7 a60cb4cd .config console log report syz C ci-upstream-kasan-gce
2019/09/11 10:28 upstream 3120b9a6a3f7 a60cb4cd .config console log report syz C ci-upstream-kasan-gce
2019/09/11 06:13 upstream 3120b9a6a3f7 a60cb4cd .config console log report syz C ci-upstream-kasan-gce
2019/09/11 04:08 upstream 3120b9a6a3f7 a60cb4cd .config console log report syz C ci-upstream-kasan-gce
2019/09/10 11:10 upstream 56037cadf604 a60cb4cd .config console log report syz C ci-upstream-kasan-gce-smack-root
2019/09/10 06:07 upstream 56037cadf604 a60cb4cd .config console log report syz C ci-upstream-kasan-gce-root
2019/09/09 20:00 upstream f74c2bb98776 a60cb4cd .config console log report syz C ci-upstream-kasan-gce-selinux-root
2019/09/09 16:18 upstream f74c2bb98776 a60cb4cd .config console log report syz C ci-upstream-kasan-gce-root
2019/09/09 13:12 upstream f74c2bb98776 a60cb4cd .config console log report syz C ci-upstream-kasan-gce
2019/09/09 08:55 upstream f74c2bb98776 a60cb4cd .config console log report syz C ci-upstream-kasan-gce-selinux-root
2019/09/08 14:19 upstream b3a9964cfa69 a60cb4cd .config console log report syz C ci-upstream-kasan-gce
2019/09/08 12:24 upstream b3a9964cfa69 a60cb4cd .config console log report syz C ci-upstream-kasan-gce-root
2019/09/08 08:45 upstream b3a9964cfa69 a60cb4cd .config console log report syz C ci-upstream-kasan-gce-smack-root
2019/09/07 23:26 upstream 1e3778cb223e a60cb4cd .config console log report syz C ci-upstream-kasan-gce-root
2019/09/07 17:03 upstream 1e3778cb223e a60cb4cd .config console log report syz C ci-upstream-kasan-gce-root
2019/09/07 13:18 upstream 1e3778cb223e a60cb4cd .config console log report syz C ci-upstream-kasan-gce-selinux-root
2019/09/07 09:55 upstream 1e3778cb223e a60cb4cd .config console log report syz C ci-upstream-kasan-gce-selinux-root
2019/09/10 12:20 upstream 56037cadf604 a60cb4cd .config console log report syz C ci-upstream-kasan-gce-386
2019/09/09 18:42 upstream f74c2bb98776 a60cb4cd .config console log report syz C ci-upstream-kasan-gce-386
2019/09/07 16:24 upstream 1e3778cb223e a60cb4cd .config console log report syz C ci-upstream-kasan-gce-386
2019/09/08 08:46 net-old 28abe5796252 a60cb4cd .config console log report syz C ci-upstream-net-this-kasan-gce
2019/09/07 20:56 net-old 0c04eb72d332 a60cb4cd .config console log report syz C ci-upstream-net-this-kasan-gce
2019/09/15 16:36 net-next-old a3d3c74da49c 32d59357 .config console log report syz C ci-upstream-net-kasan-gce
2019/09/14 01:58 net-next-old 022c10d6c73b 32d59357 .config console log report syz C ci-upstream-net-kasan-gce
2019/09/12 13:03 net-next-old c1609946b8b6 f4e53c10 .config console log report syz C ci-upstream-net-kasan-gce
2019/09/11 09:05 net-next-old 074be7fd99a2 a60cb4cd .config console log report syz C ci-upstream-net-kasan-gce
2019/09/08 07:05 net-next-old 6703a605b5ab a60cb4cd .config console log report syz C ci-upstream-net-kasan-gce
2019/09/15 23:07 linux-next 6d028043b55e 32d59357 .config console log report syz C ci-upstream-linux-next-kasan-gce-root
2019/09/10 18:04 linux-next 6d028043b55e a60cb4cd .config console log report syz C ci-upstream-linux-next-kasan-gce-root
2019/09/09 04:22 linux-next 6d028043b55e a60cb4cd .config console log report syz C ci-upstream-linux-next-kasan-gce-root
2019/09/08 17:15 linux-next 6d028043b55e a60cb4cd .config console log report syz C ci-upstream-linux-next-kasan-gce-root
2019/09/08 15:22 linux-next 6d028043b55e a60cb4cd .config console log report syz C ci-upstream-linux-next-kasan-gce-root
2019/09/08 13:49 linux-next 6d028043b55e a60cb4cd .config console log report syz C ci-upstream-linux-next-kasan-gce-root
2019/09/09 20:22 upstream 56037cadf604 a60cb4cd .config console log report ci-upstream-kasan-gce
2019/09/08 01:23 upstream b3a9964cfa69 a60cb4cd .config console log report ci-upstream-kasan-gce
2019/01/05 22:38 upstream f1c2f8857c5a 53be0a37 .config console log report ci-upstream-kasan-gce-root
2019/09/09 01:59 net-old 28abe5796252 a60cb4cd .config console log report ci-upstream-net-this-kasan-gce
2019/05/25 03:23 net-old ce8d24f9a596 85c57315 .config console log report ci-upstream-net-this-kasan-gce
2019/09/10 02:11 net-next-old 6703a605b5ab a60cb4cd .config console log report ci-upstream-net-kasan-gce
2019/01/07 05:53 net-next-old b71acb0e3721 ee332608 .config console log report ci-upstream-net-kasan-gce
2019/01/03 22:13 net-next-old b71acb0e3721 66fcd29b .config console log report ci-upstream-net-kasan-gce
2019/01/01 12:45 net-next-old b71acb0e3721 3d85f48c .config console log report ci-upstream-net-kasan-gce
2019/01/01 12:00 net-next-old b71acb0e3721 3d85f48c .config console log report ci-upstream-net-kasan-gce
2018/12/31 19:23 net-next-old b71acb0e3721 2b42fdc8 .config console log report ci-upstream-net-kasan-gce
2018/12/31 00:13 net-next-old b71acb0e3721 2b42fdc8 .config console log report ci-upstream-net-kasan-gce
2018/12/30 18:43 net-next-old b71acb0e3721 9942de5f .config console log report ci-upstream-net-kasan-gce
2018/12/29 09:26 net-next-old b71acb0e3721 e33ad0f1 .config console log report ci-upstream-net-kasan-gce
2018/12/29 08:01 net-next-old b71acb0e3721 e33ad0f1 .config console log report ci-upstream-net-kasan-gce
2018/12/29 07:57 net-next-old b71acb0e3721 e33ad0f1 .config console log report ci-upstream-net-kasan-gce
2018/12/26 16:32 linux-next 6a1d293238c1 8a41a0ad .config console log report ci-upstream-linux-next-kasan-gce-root
* Struck through repros no longer work on HEAD.