INFO: task syz-executor.3:11528 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.3 state:D stack:28016 pid:11528 ppid: 3645 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: 0023:0xf6eac549
RSP: 002b:00000000f753db20 EFLAGS: 00000286 ORIG_RAX: 0000000000000006
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 00000000f6fe4000 RDI: 0000000000000000
RBP: 00000000f700e6c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Showing all locks held in the system:
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
1 lock held by klogd/2952:
2 locks held by getty/3276:
#0: ffff88807f240098 (&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
5 locks held by kworker/u4:14/9574:
1 lock held by syz-executor.3/11528:
#0: ffff888041940218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop_vq drivers/vhost/net.c:1359 [inline]
#0: ffff888041940218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop+0x142/0x270 drivers/vhost/net.c:1373
1 lock held by vhost-11535/11536:
=============================================
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: 2945 Comm: syslogd Not tainted 5.17.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__lock_acquire+0x36b/0x56c0 kernel/locking/lockdep.c:4965
Code: 89 fa 83 d8 ff c1 e5 0f c1 e0 0d 41 c1 e7 10 0f b7 ed 09 e8 41 81 e7 00 00 03 00 41 c1 e1 13 41 09 c7 8b 44 24 08 48 c1 ea 03 e0 12 25 00 00 04 00 41 09 c7 8b 84 24 58 01 00 00 45 09 f9 c1
RSP: 0018:ffffc90001cbf490 EFLAGS: 00000807
RAX: 0000000000000001 RBX: ffff88807e226160 RCX: 0000000000000000
RDX: 1ffff1100fc44c30 RSI: 0000000000000004 RDI: ffff88807e226184
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000080000
R10: 0000000000000001 R11: 0000000000000001 R12: ffff88807e226160
R13: ffff88807e225700 R14: ffff8880b9d39c58 R15: 0000000000000000
FS: 00007f1271f10800(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff5631a8000 CR3: 000000007f56f000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire kernel/locking/lockdep.c:5639 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5604
_raw_spin_lock_nested+0x30/0x40 kernel/locking/spinlock.c:378
raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:489
raw_spin_rq_lock kernel/sched/sched.h:1318 [inline]
rq_lock kernel/sched/sched.h:1616 [inline]
__schedule+0x240/0x4910 kernel/sched/core.c:6210
schedule+0xd2/0x260 kernel/sched/core.c:6369
schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857
__skb_wait_for_more_packets+0x35b/0x5e0 net/core/datagram.c:122
__unix_dgram_recvmsg+0x202/0xb80 net/unix/af_unix.c:2404
unix_dgram_recvmsg+0xca/0xf0 net/unix/af_unix.c:2489
sock_recvmsg_nosec net/socket.c:948 [inline]
sock_recvmsg net/socket.c:966 [inline]
sock_recvmsg net/socket.c:962 [inline]
sock_read_iter+0x33c/0x470 net/socket.c:1039
call_read_iter include/linux/fs.h:2068 [inline]
new_sync_read+0x5c2/0x6e0 fs/read_write.c:400
vfs_read+0x35c/0x600 fs/read_write.c:481
ksys_read+0x1ee/0x250 fs/read_write.c:619
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f127209c8fe
Code: c0 e9 e6 fe ff ff 50 48 8d 3d 0e c7 09 00 e8 c9 cf 01 00 66 0f 1f 84 00 00 00 00 00 64 8b 04 25 18 00 00 00 85 c0 75 14 0f 05 <48> 3d 00 f0 ff ff 77 5a c3 66 0f 1f 84 00 00 00 00 00 48 83 ec 28
RSP: 002b:00007ffe05ba09f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f127209c8fe
RDX: 00000000000000ff RSI: 000055eebdc3a950 RDI: 0000000000000000
RBP: 000055eebdc3a910 R08: 00007f127212c040 R09: 00007f127212c0c0
R10: 00007f127212bfc0 R11: 0000000000000246 R12: 000055eebdc3a9dc
R13: 000055eebdc3a950 R14: 0000000000000000 R15: 0000000000000000
----------------
Code disassembly (best guess):
0: 89 fa mov %edi,%edx
2: 83 d8 ff sbb $0xffffffff,%eax
5: c1 e5 0f shl $0xf,%ebp
8: c1 e0 0d shl $0xd,%eax
b: 41 c1 e7 10 shl $0x10,%r15d
f: 0f b7 ed movzwl %bp,%ebp
12: 09 e8 or %ebp,%eax
14: 41 81 e7 00 00 03 00 and $0x30000,%r15d
1b: 41 c1 e1 13 shl $0x13,%r9d
1f: 41 09 c7 or %eax,%r15d
22: 8b 44 24 08 mov 0x8(%rsp),%eax
26: 48 c1 ea 03 shr $0x3,%rdx
* 2a: c1 e0 12 shl $0x12,%eax <-- trapping instruction
2d: 25 00 00 04 00 and $0x40000,%eax
32: 41 09 c7 or %eax,%r15d
35: 8b 84 24 58 01 00 00 mov 0x158(%rsp),%eax
3c: 45 09 f9 or %r15d,%r9d
3f: c1 .byte 0xc1