team0 (unregistering): Port device team_slave_0 removed
bond0 (unregistering): Releasing backup interface bond_slave_1
bond0 (unregistering): Releasing backup interface bond_slave_0
bond0 (unregistering): Released all slaves
INFO: task syz-executor.0:17307 blocked for more than 140 seconds.
Not tainted 4.14.160-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0 D28128 17307 15671 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2808 [inline]
__schedule+0x7b8/0x1cd0 kernel/sched/core.c:3384
schedule+0x92/0x1c0 kernel/sched/core.c:3428
schedule_timeout+0x93b/0xe10 kernel/time/timer.c:1723
do_wait_for_common kernel/sched/completion.c:91 [inline]
__wait_for_common kernel/sched/completion.c:112 [inline]
wait_for_common kernel/sched/completion.c:123 [inline]
wait_for_completion+0x27c/0x420 kernel/sched/completion.c:144
flush_workqueue+0x3d1/0x1400 kernel/workqueue.c:2674
nbd_start_device_ioctl drivers/block/nbd.c:1239 [inline]
__nbd_ioctl drivers/block/nbd.c:1310 [inline]
nbd_ioctl+0x9c4/0xb30 drivers/block/nbd.c:1350
__blkdev_driver_ioctl block/ioctl.c:297 [inline]
blkdev_ioctl+0x96b/0x1860 block/ioctl.c:594
block_ioctl+0xde/0x120 fs/block_dev.c:1881
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:500 [inline]
do_vfs_ioctl+0x7ae/0x1060 fs/ioctl.c:684
SYSC_ioctl fs/ioctl.c:701 [inline]
SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45a919
RSP: 002b:00007f5dc31f1c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 000000000045a919
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000006
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5dc31f26d4
R13: 00000000004c4670 R14: 00000000004d9e60 R15: 00000000ffffffff
Showing all locks held in the system:
1 lock held by khungtaskd/1046:
#0: (tasklist_lock){.+.+}, at: [<ffffffff8148c8d8>] debug_show_all_locks+0x7f/0x21f kernel/locking/lockdep.c:4544
2 locks held by getty/7060:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff8664f823>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff83491c76>] n_tty_read+0x1e6/0x17d0 drivers/tty/n_tty.c:2156
2 locks held by getty/7061:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff8664f823>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff83491c76>] n_tty_read+0x1e6/0x17d0 drivers/tty/n_tty.c:2156
2 locks held by getty/7062:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff8664f823>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff83491c76>] n_tty_read+0x1e6/0x17d0 drivers/tty/n_tty.c:2156
2 locks held by getty/7063:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff8664f823>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff83491c76>] n_tty_read+0x1e6/0x17d0 drivers/tty/n_tty.c:2156
2 locks held by getty/7064:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff8664f823>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff83491c76>] n_tty_read+0x1e6/0x17d0 drivers/tty/n_tty.c:2156
2 locks held by getty/7065:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff8664f823>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff83491c76>] n_tty_read+0x1e6/0x17d0 drivers/tty/n_tty.c:2156
2 locks held by getty/7066:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff8664f823>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff83491c76>] n_tty_read+0x1e6/0x17d0 drivers/tty/n_tty.c:2156
2 locks held by kworker/u5:1/10626:
#0: ("knbd%d-recv"nbd->index){+.+.}, at: [<ffffffff813d581e>] work_static include/linux/workqueue.h:199 [inline]
#0: ("knbd%d-recv"nbd->index){+.+.}, at: [<ffffffff813d581e>] set_work_data kernel/workqueue.c:619 [inline]
#0: ("knbd%d-recv"nbd->index){+.+.}, at: [<ffffffff813d581e>] set_work_pool_and_clear_pending kernel/workqueue.c:646 [inline]
#0: ("knbd%d-recv"nbd->index){+.+.}, at: [<ffffffff813d581e>] process_one_work+0x76e/0x1600 kernel/workqueue.c:2085
#1: ((&args->work)){+.+.}, at: [<ffffffff813d585b>] process_one_work+0x7ab/0x1600 kernel/workqueue.c:2089
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 1046 Comm: khungtaskd Not tainted 4.14.160-syzkaller #0
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+0x142/0x197 lib/dump_stack.c:58
nmi_cpu_backtrace.cold+0x57/0x94 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x141/0x189 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:140 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline]
watchdog+0x5e7/0xb90 kernel/hung_task.c:274
kthread+0x319/0x430 kernel/kthread.c:232
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 106 Comm: kworker/u4:2 Not tainted 4.14.160-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
task: ffff8880a9ac4600 task.stack: ffff8880a9ac8000
RIP: 0010:strlen+0x5e/0xa0 lib/string.c:482
RSP: 0018:ffff8880a9acfb88 EFLAGS: 00000093
RAX: ffffffff86cb9ce5 RBX: dffffc0000000000 RCX: 0000000000000005
RDX: 0000000000000000 RSI: ffffffff87f88960 RDI: ffffffff86cb9ce0
RBP: ffff8880a9acfba0 R08: 0000000000000002 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff86cb9ce0
R13: ffffffff87f88960 R14: ffff8880a9acfc48 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c42a550148 CR3: 0000000095eac000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
trace_event_get_offsets_lock_acquire include/trace/events/lock.h:13 [inline]
perf_trace_lock_acquire+0xce/0x4f0 include/trace/events/lock.h:13
trace_lock_acquire include/trace/events/lock.h:13 [inline]
lock_acquire+0x2bf/0x430 kernel/locking/lockdep.c:3993
rcu_lock_acquire include/linux/rcupdate.h:242 [inline]
rcu_read_lock include/linux/rcupdate.h:629 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:416 [inline]
batadv_nc_worker+0x107/0x6d0 net/batman-adv/network-coding.c:726
process_one_work+0x863/0x1600 kernel/workqueue.c:2114
worker_thread+0x5d9/0x1050 kernel/workqueue.c:2248
kthread+0x319/0x430 kernel/kthread.c:232
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Code: 3c 24 00 74 3b 48 bb 00 00 00 00 00 fc ff df 4c 89 e0 48 83 c0 01 48 89 c2 48 89 c1 48 c1 ea 03 83 e1 07 0f b6 14 1a 38 ca 7f 04 <84> d2 75 23 80 38 00 75 de 48 83 c4 08 4c 29 e0 5b 41 5c 5d c3