syzbot


INFO: task hung in check_lifetime

Status: closed as dup on 2018/02/12 10:05
Subsystems: net
[Documentation on labels]
Reported-by: syzbot+c630b6e9170ae563e405@syzkaller.appspotmail.com
First crash: 2480d, last: 2480d
Duplicate of
Title Repro Cause bisect Fix bisect Count Last Reported
INFO: task hung in netdev_run_todo net 12 1919d 2474d
Discussions (1)
Title Replies (including bot) Last reply
INFO: task hung in check_lifetime 1 (2) 2018/02/12 10:04
Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in check_lifetime (3) net 9 154d 175d 0/28 auto-obsoleted due to no activity on 2024/09/18 02:57
android-49 INFO: task hung in check_lifetime 1 2386d 2386d 0/3 auto-closed as invalid on 2019/02/22 15:29
upstream INFO: task hung in check_lifetime (2) net 1 1130d 1130d 0/28 auto-closed as invalid on 2022/01/16 12:51

Sample crash report:
Cannot find set identified by id 0 to match
Cannot find set identified by id 0 to match
INFO: task kworker/1:3:6053 blocked for more than 120 seconds.
      Not tainted 4.15.0+ #221
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/1:3     D22992  6053      2 0x80000000
Workqueue: events_power_efficient check_lifetime
Call Trace:
 context_switch kernel/sched/core.c:2845 [inline]
 __schedule+0x8eb/0x2060 kernel/sched/core.c:3421
 schedule+0xf5/0x430 kernel/sched/core.c:3480
 schedule_preempt_disabled+0x10/0x20 kernel/sched/core.c:3538
 __mutex_lock_common kernel/locking/mutex.c:833 [inline]
 __mutex_lock+0xaad/0x1a80 kernel/locking/mutex.c:893
 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908
 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74
 check_lifetime+0x4e9/0x8d0 net/ipv4/devinet.c:700
 process_one_work+0xbbf/0x1af0 kernel/workqueue.c:2113
 worker_thread+0x223/0x1990 kernel/workqueue.c:2247
 kthread+0x33c/0x400 kernel/kthread.c:238
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:542

Showing all locks held in the system:
3 locks held by kworker/0:1/24:
 #0:  ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: [<00000000ea6cb14c>] process_one_work+0xaaf/0x1af0 kernel/workqueue.c:2084
 #1:  ((addr_chk_work).work){+.+.}, at: [<00000000ccf8e54d>] process_one_work+0xb01/0x1af0 kernel/workqueue.c:2088
 #2:  (rtnl_mutex){+.+.}, at: [<00000000d8542286>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74
2 locks held by khungtaskd/757:
 #0:  (rcu_read_lock){....}, at: [<000000007a7193b5>] check_hung_uninterruptible_tasks kernel/hung_task.c:175 [inline]
 #0:  (rcu_read_lock){....}, at: [<000000007a7193b5>] watchdog+0x1c5/0xd60 kernel/hung_task.c:249
 #1:  (tasklist_lock){.+.+}, at: [<000000003712cc52>] debug_show_all_locks+0xd3/0x3d0 kernel/locking/lockdep.c:4470
2 locks held by getty/4145:
 #0:  (&tty->ldisc_sem){++++}, at: [<00000000a116195c>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
 #1:  (&ldata->atomic_read_lock){+.+.}, at: [<00000000c4d26882>] n_tty_read+0x2ef/0x1a00 drivers/tty/n_tty.c:2131
2 locks held by getty/4146:
 #0:  (&tty->ldisc_sem){++++}, at: [<00000000a116195c>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
 #1:  (&ldata->atomic_read_lock){+.+.}, at: [<00000000c4d26882>] n_tty_read+0x2ef/0x1a00 drivers/tty/n_tty.c:2131
2 locks held by getty/4147:
 #0:  (&tty->ldisc_sem){++++}, at: [<00000000a116195c>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
 #1:  (&ldata->atomic_read_lock){+.+.}, at: [<00000000c4d26882>] n_tty_read+0x2ef/0x1a00 drivers/tty/n_tty.c:2131
2 locks held by getty/4148:
 #0:  (&tty->ldisc_sem){++++}, at: [<00000000a116195c>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
 #1:  (&ldata->atomic_read_lock){+.+.}, at: [<00000000c4d26882>] n_tty_read+0x2ef/0x1a00 drivers/tty/n_tty.c:2131
2 locks held by getty/4149:
 #0:  (&tty->ldisc_sem){++++}, at: [<00000000a116195c>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
 #1:  (&ldata->atomic_read_lock){+.+.}, at: [<00000000c4d26882>] n_tty_read+0x2ef/0x1a00 drivers/tty/n_tty.c:2131
2 locks held by getty/4150:
 #0:  (&tty->ldisc_sem){++++}, at: [<00000000a116195c>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
 #1:  (&ldata->atomic_read_lock){+.+.}, at: [<00000000c4d26882>] n_tty_read+0x2ef/0x1a00 drivers/tty/n_tty.c:2131
2 locks held by getty/4151:
 #0:  (&tty->ldisc_sem){++++}, at: [<00000000a116195c>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
 #1:  (&ldata->atomic_read_lock){+.+.}, at: [<00000000c4d26882>] n_tty_read+0x2ef/0x1a00 drivers/tty/n_tty.c:2131
3 locks held by kworker/1:3/6053:
 #0:  ((wq_completion)"events_power_efficient"){+.+.}, at: [<00000000ea6cb14c>] process_one_work+0xaaf/0x1af0 kernel/workqueue.c:2084
 #1:  ((check_lifetime_work).work){+.+.}, at: [<00000000ccf8e54d>] process_one_work+0xb01/0x1af0 kernel/workqueue.c:2088
 #2:  (rtnl_mutex){+.+.}, at: [<00000000d8542286>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74
3 locks held by kworker/1:4/6058:
 #0:  ((wq_completion)"events_power_efficient"){+.+.}, at: [<00000000ea6cb14c>] process_one_work+0xaaf/0x1af0 kernel/workqueue.c:2084
 #1:  ((reg_check_chans).work){+.+.}, at: [<00000000ccf8e54d>] process_one_work+0xb01/0x1af0 kernel/workqueue.c:2088
 #2:  (rtnl_mutex){+.+.}, at: [<00000000d8542286>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74
1 lock held by syz-executor7/10525:
 #0:  (sk_lock-AF_INET6){+.+.}, at: [<000000003aa50582>] lock_sock include/net/sock.h:1463 [inline]
 #0:  (sk_lock-AF_INET6){+.+.}, at: [<000000003aa50582>] ipv6_getsockopt+0x1c5/0x2e0 net/ipv6/ipv6_sockglue.c:1370
1 lock held by syz-executor7/10527:
 #0:  (rtnl_mutex){+.+.}, at: [<00000000d8542286>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 757 Comm: khungtaskd Not tainted 4.15.0+ #221
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 nmi_cpu_backtrace+0x1d2/0x210 lib/nmi_backtrace.c:103
 nmi_trigger_cpumask_backtrace+0x122/0x180 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_all_cpu_backtrace include/linux/nmi.h:138 [inline]
 check_hung_task kernel/hung_task.c:132 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:190 [inline]
 watchdog+0x90c/0xd60 kernel/hung_task.c:249
 kthread+0x33c/0x400 kernel/kthread.c:238
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:542
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.15.0+ #221
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:ktime_get+0x7e/0x3a0 kernel/time/timekeeping.c:759
RSP: 0018:ffff8801db407c30 EFLAGS: 00000093
RAX: ffffffff86a2c340 RBX: ffff8801db426620 RCX: ffffffff816158c8
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000082
RBP: ffff8801db407d18 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff1003b680f8a
R13: ffff8801db407cf0 R14: ffff8801db407e68 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000001eb8000 CR3: 0000000006a22002 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 tick_nohz_irq_enter kernel/time/tick-sched.c:1148 [inline]
 tick_irq_enter+0x9e/0x390 kernel/time/tick-sched.c:1169
 irq_enter+0xb6/0xd0 kernel/softirq.c:346
 scheduler_ipi+0x23d/0x820 kernel/sched/core.c:1794
 smp_reschedule_interrupt+0xe6/0x670 arch/x86/kernel/smp.c:277
 reschedule_interrupt+0xa9/0xb0 arch/x86/entry/entry_64.S:962
 </IRQ>
RIP: 0010:native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:54
RSP: 0018:ffffffff86a07c38 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff02
RAX: dffffc0000000000 RBX: 1ffffffff0d40f8a RCX: 0000000000000000
RDX: 1ffffffff0d59280 RSI: 0000000000000001 RDI: ffffffff86ac9400
RBP: ffffffff86a07c38 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffffffff86a07cf0 R14: ffffffff87268d60 R15: 0000000000000000
 arch_safe_halt arch/x86/include/asm/paravirt.h:93 [inline]
 default_idle+0xbf/0x430 arch/x86/kernel/process.c:354
 arch_cpu_idle+0xa/0x10 arch/x86/kernel/process.c:345
 default_idle_call+0x36/0x90 kernel/sched/idle.c:98
 cpuidle_idle_call kernel/sched/idle.c:156 [inline]
 do_idle+0x24a/0x3b0 kernel/sched/idle.c:246
 cpu_startup_entry+0x104/0x120 kernel/sched/idle.c:351
 rest_init+0xed/0xf0 init/main.c:436
 start_kernel+0x7f1/0x819 init/main.c:716
 x86_64_start_reservations+0x2a/0x2c arch/x86/kernel/head64.c:378
 x86_64_start_kernel+0x77/0x7a arch/x86/kernel/head64.c:359
 secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:237
Code: f1 f1 f1 f1 c7 40 04 04 f2 f2 f2 c7 40 08 f2 f2 f2 f2 c7 40 0c 00 f2 f2 f2 c7 40 10 f3 f3 f3 f3 e8 e8 4c 0f 00 8b 15 26 36 c5 05 <85> d2 0f 85 b4 02 00 00 48 c7 c0 f0 93 ac 86 48 bb 00 00 00 00 

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/02/06 06:43 net-next-old 617aebe6a97e a1bc9d40 .config console log report ci-upstream-net-kasan-gce
* Struck through repros no longer work on HEAD.