INFO: task syz-executor.1:20429 blocked for more than 143 seconds.
Not tainted 5.17.0-rc4-syzkaller-00241-g7f25f0412c9e #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:26864 pid:20429 ppid: 3623 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4987 [inline]
__schedule+0x926/0x1080 kernel/sched/core.c:6296
schedule+0x12b/0x1f0 kernel/sched/core.c:6369
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6428
__mutex_lock_common+0xd1f/0x2590 kernel/locking/mutex.c:673
__mutex_lock kernel/locking/mutex.c:733 [inline]
mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:785
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:317
task_work_run+0x146/0x1c0 kernel/task_work.c:164
tracehook_notify_resume include/linux/tracehook.h:188 [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: 0033:0x7f4e21c06c9b
RSP: 002b:00007ffcdf5db1c0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f4e21c06c9b
RDX: 0000001b2dd20000 RSI: 0000001b2dd21f3c RDI: 0000000000000003
RBP: 00007f4e21d68960 R08: 0000000000000000 R09: 00000000dffdd265
R10: 00007ffcdf5e80b8 R11: 0000000000000293 R12: 0000000000126421
R13: 00007ffcdf5db2c0 R14: 00007f4e21d67100 R15: 0000000000000032
Showing all locks held in the system:
1 lock held by khungtaskd/26:
#0: ffffffff8cb1d460 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3277:
#0: ffff88814ad78098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc90002b662e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6c5/0x1c60 drivers/tty/n_tty.c:2075
1 lock held by syz-executor.1/20429:
#0: ffff8880283f0218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop_vq drivers/vhost/net.c:1359 [inline]
#0: ffff8880283f0218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop+0x10c/0x1e0 drivers/vhost/net.c:1373
1 lock held by vhost-20431/20435:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 26 Comm: khungtaskd Not tainted 5.17.0-rc4-syzkaller-00241-g7f25f0412c9e #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:212 [inline]
watchdog+0xc82/0xcd0 kernel/hung_task.c:369
kthread+0x2a3/0x2d0 kernel/kthread.c:377
ret_from_fork+0x1f/0x30
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 8556 Comm: kworker/0:1 Not tainted 5.17.0-rc4-syzkaller-00241-g7f25f0412c9e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events nsim_dev_trap_report_work
RIP: 0010:__lock_is_held kernel/locking/lockdep.c:5377 [inline]
RIP: 0010:lock_is_held_type+0xb8/0x190 kernel/locking/lockdep.c:5682
Code: 60 0a 00 00 31 db 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 83 fb 31 73 24 48 89 ef 4c 89 fe e8 ff 01 00 00 85 c0 75 2a 48 ff c3 <49> 63 85 58 0a 00 00 48 83 c5 28 48 39 c3 7c d8 eb 11 48 c7 c7 20
RSP: 0018:ffffc9000ef07958 EFLAGS: 00000002
RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000080000002
RDX: ffff88801e2d9d00 RSI: ffffffff8cb1d3c0 RDI: ffff88801e2da788
RBP: ffff88801e2da788 R08: ffffffff84a13037 R09: fffffbfff1c008ae
R10: fffffbfff1c008ae R11: 0000000000000000 R12: 0000000000000246
R13: ffff88801e2d9d00 R14: 00000000ffffffff R15: ffffffff8cb1d3c0
FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c005020100 CR3: 000000007eaed000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
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:151
_get_random_bytes drivers/char/random.c:1453 [inline]
get_random_bytes+0xc9/0x230 drivers/char/random.c:1475
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+0x86c/0x1190 kernel/workqueue.c:2307
worker_thread+0xab1/0x1300 kernel/workqueue.c:2454
kthread+0x2a3/0x2d0 kernel/kthread.c:377
ret_from_fork+0x1f/0x30
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 0a 00 or (%rax),%al
2: 00 31 add %dh,(%rcx)
4: db 66 2e (bad) 0x2e(%rsi)
7: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1)
e: 00
f: 66 90 xchg %ax,%ax
11: 48 83 fb 31 cmp $0x31,%rbx
15: 73 24 jae 0x3b
17: 48 89 ef mov %rbp,%rdi
1a: 4c 89 fe mov %r15,%rsi
1d: e8 ff 01 00 00 callq 0x221
22: 85 c0 test %eax,%eax
24: 75 2a jne 0x50
26: 48 ff c3 inc %rbx
* 29: 49 63 85 58 0a 00 00 movslq 0xa58(%r13),%rax <-- trapping instruction
30: 48 83 c5 28 add $0x28,%rbp
34: 48 39 c3 cmp %rax,%rbx
37: 7c d8 jl 0x11
39: eb 11 jmp 0x4c
3b: 48 rex.W
3c: c7 .byte 0xc7
3d: c7 (bad)
3e: 20 .byte 0x20