INFO: task syz-executor.5:4093 blocked for more than 143 seconds.
Not tainted 5.17.0-rc4-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:27208 pid: 4093 ppid: 3622 flags:0x20000004
Call Trace:
context_switch kernel/sched/core.c:4987 [inline]
__schedule+0xa94/0x4910 kernel/sched/core.c:6296
schedule+0xd2/0x260 kernel/sched/core.c:6369
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6428
__mutex_lock_common kernel/locking/mutex.c:673 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:733
vhost_net_stop_vq drivers/vhost/net.c:1359 [inline]
vhost_net_stop+0x142/0x270 drivers/vhost/net.c:1373
vhost_net_release+0x9c/0x2d0 drivers/vhost/net.c:1405
__fput+0x286/0x9f0 fs/file_table.c:313
task_work_run+0xdd/0x1a0 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+0x27e/0x290 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
__do_fast_syscall_32+0x72/0xf0 arch/x86/entry/common.c:181
do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203
entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf6f24549
RSP: 002b:00000000f75b5b20 EFLAGS: 00000286 ORIG_RAX: 0000000000000006
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 00000000f705c000 RDI: 0000000000000000
RBP: 00000000f70866c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Showing all locks held in the system:
no locks held by rcu_preempt/14.
1 lock held by khungtaskd/27:
#0: ffffffff8bb84360 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6460
2 locks held by getty/3278:
#0: ffff88802309e098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc90002b662e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2077
1 lock held by syz-executor.5/4093:
#0: ffff88807c000218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop_vq drivers/vhost/net.c:1359 [inline]
#0: ffff88807c000218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop+0x142/0x270 drivers/vhost/net.c:1373
1 lock held by vhost-4097/4101:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.17.0-rc4-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+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1e6/0x230 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+0xc1d/0xf50 kernel/hung_task.c:369
kthread+0x2e9/0x3a0 kernel/kthread.c:377
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 54 Comm: kworker/u4:3 Not tainted 5.17.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: 0x0 (bat_events)
RIP: 0010:preempt_count_add+0x16/0x140 kernel/sched/core.c:5443
Code: f6 48 89 ef 41 89 dd e8 18 ac 6f 00 eb bd 66 0f 1f 44 00 00 48 c7 c0 00 f9 50 90 55 48 ba 00 00 00 00 00 fc ff df 48 89 c1 53 <83> e0 07 89 fb 48 c1 e9 03 83 c0 03 0f b6 14 11 38 d0 7c 08 84 d2
RSP: 0018:ffffc90001a2fe38 EFLAGS: 00000093
RAX: ffffffff9050f900 RBX: ffff888011903a00 RCX: ffffffff9050f900
RDX: dffffc0000000000 RSI: ffffffff89509971 RDI: 0000000000000001
RBP: ffff888010c69800 R08: 0000000000000000 R09: ffff888011903a07
R10: ffffffff817f0fdd R11: 0000000000000001 R12: ffff88806dbe9d00
R13: ffff888015b9c000 R14: 0000000000000000 R15: ffff888010c69800
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fca537cf040 CR3: 000000000b88e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__raw_spin_lock_irq include/linux/spinlock_api_smp.h:118 [inline]
_raw_spin_lock_irq+0x16/0x50 kernel/locking/spinlock.c:170
worker_thread+0x166/0x1110 kernel/workqueue.c:2404
kthread+0x2e9/0x3a0 kernel/kthread.c:377
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess):
0: f6 48 89 ef testb $0xef,-0x77(%rax)
4: 41 89 dd mov %ebx,%r13d
7: e8 18 ac 6f 00 callq 0x6fac24
c: eb bd jmp 0xffffffcb
e: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1)
14: 48 c7 c0 00 f9 50 90 mov $0xffffffff9050f900,%rax
1b: 55 push %rbp
1c: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx
23: fc ff df
26: 48 89 c1 mov %rax,%rcx
29: 53 push %rbx
* 2a: 83 e0 07 and $0x7,%eax <-- trapping instruction
2d: 89 fb mov %edi,%ebx
2f: 48 c1 e9 03 shr $0x3,%rcx
33: 83 c0 03 add $0x3,%eax
36: 0f b6 14 11 movzbl (%rcx,%rdx,1),%edx
3a: 38 d0 cmp %dl,%al
3c: 7c 08 jl 0x46
3e: 84 d2 test %dl,%dl