netlink: 16 bytes leftover after parsing attributes in process `syz-executor.0'.
INFO: task syz-executor.1:8880 blocked for more than 140 seconds.
Not tainted 4.19.85-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1 D28216 8880 8420 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2826 [inline]
__schedule+0x866/0x1dc0 kernel/sched/core.c:3515
schedule+0x92/0x1c0 kernel/sched/core.c:3559
schedule_timeout+0x8c8/0xfc0 kernel/time/timer.c:1782
do_wait_for_common kernel/sched/completion.c:83 [inline]
__wait_for_common kernel/sched/completion.c:104 [inline]
wait_for_common kernel/sched/completion.c:115 [inline]
wait_for_completion+0x29c/0x440 kernel/sched/completion.c:136
kthread_stop+0x116/0x6c0 kernel/kthread.c:550
vivid_stop_generating_vid_cap+0x1e0/0x6e2 drivers/media/platform/vivid/vivid-kthread-cap.c:922
vid_cap_stop_streaming+0x8a/0xe0 drivers/media/platform/vivid/vivid-vid-cap.c:256
__vb2_queue_cancel+0xb1/0x790 drivers/media/common/videobuf2/videobuf2-core.c:1682
vb2_core_streamoff+0x60/0x150 drivers/media/common/videobuf2/videobuf2-core.c:1816
__vb2_cleanup_fileio+0x78/0x170 drivers/media/common/videobuf2/videobuf2-core.c:2343
vb2_core_queue_release+0x20/0x80 drivers/media/common/videobuf2/videobuf2-core.c:2070
vb2_queue_release drivers/media/common/videobuf2/videobuf2-v4l2.c:671 [inline]
_vb2_fop_release+0x1cf/0x2a0 drivers/media/common/videobuf2/videobuf2-v4l2.c:842
vb2_fop_release+0x75/0xc0 drivers/media/common/videobuf2/videobuf2-v4l2.c:856
vivid_fop_release+0x18e/0x430 drivers/media/platform/vivid/vivid-core.c:474
v4l2_release+0xf9/0x1a0 drivers/media/v4l2-core/v4l2-dev.c:448
__fput+0x2dd/0x8b0 fs/file_table.c:278
____fput+0x16/0x20 fs/file_table.c:309
task_work_run+0x145/0x1c0 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:193 [inline]
exit_to_usermode_loop+0x273/0x2c0 arch/x86/entry/common.c:167
prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
do_syscall_64+0x53d/0x620 arch/x86/entry/common.c:296
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4141d1
Code: 65 00 31 d2 be 53 25 44 00 bf 09 3d 44 00 ff 15 95 57 24 00 b9 c0 99 65 00 31 d2 be 44 25 44 00 bf 09 3d 44 00 ff 15 7e 57 24 <00> b9 20 9b 65 00 31 d2 be ac 94 44 00 bf 09 3d 44 00 ff 15 67 57
RSP: 002b:00007fff614da170 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00000000004141d1
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 0000000000000001 R08: ffffffff8100a277 R09: 00000000feecbb3a
R10: 00007fff614da250 R11: 0000000000000293 R12: 000000000075bf20
R13: 00000000000416c8 R14: 0000000000760b80 R15: 000000000075bf2c
Showing all locks held in the system:
3 locks held by kworker/u4:1/23:
#0: 000000007f8d455c (&rq->lock){-.-.}, at: idle_balance kernel/sched/fair.c:9591 [inline]
#0: 000000007f8d455c (&rq->lock){-.-.}, at: pick_next_task_fair+0xfae/0x1580 kernel/sched/fair.c:6772
#1: 00000000a85c7485 (rcu_read_lock){....}, at: __update_idle_core+0x45/0x3f0 kernel/sched/fair.c:5989
#2: 0000000056e4c8de (&base->lock){-.-.}, at: lock_timer_base+0x56/0x1b0 kernel/time/timer.c:938
1 lock held by khungtaskd/1038:
#0: 00000000a85c7485 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:4438
1 lock held by rsyslogd/7441:
#0: 000000005d61a54e (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:767
2 locks held by getty/7564:
#0: 00000000b02aecad (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362
#1: 0000000096ec12cd (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
2 locks held by getty/7565:
#0: 00000000399e385c (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362
#1: 0000000055cdfb9a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
2 locks held by getty/7566:
#0: 00000000a6ed0622 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362
#1: 000000004bb0664f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
2 locks held by getty/7567:
#0: 00000000682cecd8 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362
#1: 000000008fb543ff (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
2 locks held by getty/7568:
#0: 00000000d8271430 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362
#1: 00000000579efb6d (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
2 locks held by getty/7569:
#0: 00000000c47e35ed (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362
#1: 000000003e908042 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
2 locks held by getty/7570:
#0: 000000007d0efdc4 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362
#1: 000000006622befd (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 1038 Comm: khungtaskd Not tainted 4.19.85-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x197/0x210 lib/dump_stack.c:118
nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 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:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline]
watchdog+0x9df/0xee0 kernel/hung_task.c:287
kthread+0x354/0x420 kernel/kthread.c:246
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.19.85-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:_local_bh_enable+0x0/0x30 kernel/softirq.c:160
Code: b0 88 e8 03 a1 61 00 e9 15 ff ff ff e8 f9 a0 61 00 e9 50 ff ff ff e8 ef a0 61 00 eb a7 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 <55> 48 89 e5 65 8b 05 35 d8 c1 7e a9 00 00 0f 00 75 0c bf 00 02 00
RSP: 0018:ffff8880ae907f70 EFLAGS: 00000092
RAX: ffff8880aa2703c0 RBX: ffff8880aa2703c0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff815fb7fc RDI: ffff8880aa270c08
RBP: ffff8880ae907f80 R08: ffff8880aa2703c0 R09: ffffed1015d2598d
R10: ffffed1015d2598c R11: ffff8880ae92cc63 R12: ffff8880aa2703c0
R13: ffff8880ae900000 R14: ffff8880aa2703c0 R15: ffffffff884ddf08
FS: 0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffff600400 CR3: 00000000a9689000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
scheduler_ipi+0x280/0x5b0 kernel/sched/core.c:1771
smp_reschedule_interrupt+0x78/0x460 arch/x86/kernel/smp.c:286
reschedule_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:917
RIP: 0010:native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:61
Code: ff ff 48 89 df e8 22 39 af fa eb 82 e9 07 00 00 00 0f 00 2d 84 6a 55 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 74 6a 55 00 fb f4 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 ae 15 67 fa e8 79
RSP: 0018:ffff8880aa27fd08 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff02
RAX: 1ffffffff10e4b74 RBX: ffff8880aa2703c0 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffff8880aa270c3c
RBP: ffff8880aa27fd38 R08: ffff8880aa2703c0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
R13: ffffffff88725b90 R14: 0000000000000000 R15: ffff8880aa2703c0
arch_cpu_idle+0xa/0x10 arch/x86/kernel/process.c:556
default_idle_call+0x36/0x90 kernel/sched/idle.c:93
cpuidle_idle_call kernel/sched/idle.c:153 [inline]
do_idle+0x30c/0x4d0 kernel/sched/idle.c:263
cpu_startup_entry+0xc8/0xe0 kernel/sched/idle.c:369
start_secondary+0x3e8/0x5b0 arch/x86/kernel/smpboot.c:271
secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243