INFO: task syz-executor.3:21472 blocked for more than 143 seconds.
Not tainted 5.16.0-rc8-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:26864 pid:21472 ppid: 11327 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xb72/0x1460 kernel/sched/core.c:6253
schedule+0x12b/0x1f0 kernel/sched/core.c:6326
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
__mutex_lock_common+0xe9f/0x2490 kernel/locking/mutex.c:680
__mutex_lock kernel/locking/mutex.c:740 [inline]
mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:792
vhost_net_stop_vq drivers/vhost/net.c:1359 [inline]
vhost_net_stop+0x10c/0x1e0 drivers/vhost/net.c:1373
vhost_net_release+0x100/0x4d0 drivers/vhost/net.c:1405
__fput+0x3fc/0x870 fs/file_table.c:280
task_work_run+0x146/0x1c0 kernel/task_work.c:164
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop kernel/entry/common.c:175 [inline]
exit_to_user_mode_prepare+0x209/0x220 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x2e/0x70 kernel/entry/common.c:300
do_syscall_64+0x53/0xd0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f38766deadb
RSP: 002b:00007ffd1e3c54d0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f38766deadb
RDX: 00007f38768436b8 RSI: ffffffffffffffff RDI: 0000000000000003
RBP: 00007f3876840960 R08: 0000000000000000 R09: 00007f38768436c0
R10: 00007ffd1e3c55d0 R11: 0000000000000293 R12: 00000000000be59c
R13: 00007ffd1e3c55d0 R14: 00007f387683ef60 R15: 0000000000000032
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8cb1de00 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3281:
#0: ffff88802435d098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc90002b962e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6c5/0x1c60 drivers/tty/n_tty.c:2113
2 locks held by kworker/u4:10/3858:
#0: ffff8880b9a395d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x25/0x110 kernel/sched/core.c:478
#1: ffffc90004d67d20 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2273
1 lock held by syz-executor.3/21472:
#0: ffff888061670218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop_vq drivers/vhost/net.c:1359 [inline]
#0: ffff888061670218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop+0x10c/0x1e0 drivers/vhost/net.c:1373
1 lock held by vhost-21474/21478:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc8-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1dc/0x2d8 lib/dump_stack.c:106
nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x16a/0x280 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
watchdog+0xc82/0xcd0 kernel/hung_task.c:295
kthread+0x468/0x490 kernel/kthread.c:327
ret_from_fork+0x1f/0x30
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 10291 Comm: kworker/0:19 Not tainted 5.16.0-rc8-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events nsim_dev_trap_report_work
RIP: 0010:match_held_lock+0x0/0xb0 kernel/locking/lockdep.c:5085
Code: db 48 c7 c7 60 ff 6e 8a 48 c7 c6 a0 ff 6e 8a 31 c0 e8 14 d7 43 f7 0f 0b eb 8b 0f 0b eb 87 e8 c7 fa ff ff 0f 1f 80 00 00 00 00 <55> 53 bd 01 00 00 00 48 39 77 10 74 67 48 89 fb 81 7f 20 00 00 10
RSP: 0018:ffffc900028ef950 EFLAGS: 00000083
RAX: 0000000000000004 RBX: ffff88807eac8a88 RCX: 0000000080000002
RDX: ffff88807eac8000 RSI: ffffffff8cb1dd60 RDI: ffff88807eac8a88
RBP: 0000000000000001 R08: ffffffff84993fa7 R09: fffffbfff1bfd5ce
R10: fffffbfff1bfd5ce R11: 0000000000000000 R12: 0000000000000246
R13: ffff88807eac8000 R14: 00000000ffffffff R15: ffffffff8cb1dd60
FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000560f60f4f7f8 CR3: 000000000c88e000 CR4: 00000000003506f0
Call Trace:
__lock_is_held kernel/locking/lockdep.c:5380 [inline]
lock_is_held_type+0xb1/0x190 kernel/locking/lockdep.c:5680
lock_is_held include/linux/lockdep.h:283 [inline]
rcu_read_lock_sched_held+0x89/0x130 kernel/rcu/update.c:125
trace_get_random_bytes+0x86/0x220 include/trace/events/random.h:160
_get_random_bytes+0x98/0x230 drivers/char/random.c:1529
nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:773 [inline]
nsim_dev_trap_report drivers/net/netdevsim/dev.c:802 [inline]
nsim_dev_trap_report_work+0x683/0xaf0 drivers/net/netdevsim/dev.c:843
process_one_work+0x853/0x1140 kernel/workqueue.c:2298
worker_thread+0xac1/0x1320 kernel/workqueue.c:2445
kthread+0x468/0x490 kernel/kthread.c:327
ret_from_fork+0x1f/0x30
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 48 c7 c7 60 ff 6e 8a mov $0xffffffff8a6eff60,%rdi
7: 48 c7 c6 a0 ff 6e 8a mov $0xffffffff8a6effa0,%rsi
e: 31 c0 xor %eax,%eax
10: e8 14 d7 43 f7 callq 0xf743d729
15: 0f 0b ud2
17: eb 8b jmp 0xffffffa4
19: 0f 0b ud2
1b: eb 87 jmp 0xffffffa4
1d: e8 c7 fa ff ff callq 0xfffffae9
22: 0f 1f 80 00 00 00 00 nopl 0x0(%rax)
* 29: 55 push %rbp <-- trapping instruction
2a: 53 push %rbx
2b: bd 01 00 00 00 mov $0x1,%ebp
30: 48 39 77 10 cmp %rsi,0x10(%rdi)
34: 74 67 je 0x9d
36: 48 89 fb mov %rdi,%rbx
39: 81 .byte 0x81
3a: 7f 20 jg 0x5c
3c: 00 00 add %al,(%rax)
3e: 10 .byte 0x10