INFO: task syz-executor.1:24392 blocked for more than 143 seconds.
Not tainted 5.16.0-rc5-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:26864 pid:24392 ppid: 3636 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+0xd1f/0x2590 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: 0033:0x7f9109955adb
RSP: 002b:00007ffc72d5f0b0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f9109955adb
RDX: 00007f9109aba6b8 RSI: ffffffffffffffff RDI: 0000000000000003
RBP: 00007f9109ab7960 R08: 0000000000000000 R09: 00007f9109aba6c0
R10: 00007ffc72d5f1b0 R11: 0000000000000293 R12: 00000000000cd7e3
R13: 00007ffc72d5f1b0 R14: 00007f9109ab5f60 R15: 0000000000000032
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8cb1de40 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3280:
#0: ffff888023e6d098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc90002b932e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6c5/0x1c60 drivers/tty/n_tty.c:2113
1 lock held by syz-executor.1/24392:
#0: ffff888024e60218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop_vq drivers/vhost/net.c:1359 [inline]
#0: ffff888024e60218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop+0x10c/0x1e0 drivers/vhost/net.c:1373
1 lock held by vhost-24397/24398:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc5-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: 24398 Comm: vhost-24397 Not tainted 5.16.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:196
Code: 84 00 00 00 00 00 0f 1f 40 00 be 0d 00 00 00 48 c7 c7 60 b0 b5 8c e8 6f c7 4b 00 c3 cc cc cc cc cc cc cc cc cc cc cc cc cc cc <48> 8b 04 24 65 48 8b 0c 25 c0 6f 02 00 65 8b 15 44 d6 7d 7e f7 c2
RSP: 0018:ffffc900061f7a70 EFLAGS: 00000246
RAX: 1ffff1100f6f9a92 RBX: ffff88807b7cd490 RCX: dffffc0000000000
RDX: ffff888022aa9d00 RSI: 000000000000000f RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff87b408ca R09: ffffed10049cc038
R10: ffffed10049cc038 R11: 0000000000000000 R12: dffffc0000000000
R13: 000000000000000f R14: ffff88807b7cd480 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000560acdc64600 CR3: 0000000072f35000 CR4: 00000000003506f0
DR0: 0080ffff00000000 DR1: 0080ffff00000000 DR2: 0080ffff00000000
DR3: 0080ffff00000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
vhost_iotlb_itree_subtree_search drivers/vhost/iotlb.c:19 [inline]
vhost_iotlb_itree_iter_first drivers/vhost/iotlb.c:19 [inline]
vhost_iotlb_itree_first+0x175/0x260 drivers/vhost/iotlb.c:169
iotlb_access_ok+0x172/0x330 drivers/vhost/vhost.c:1336
vq_meta_prefetch+0x9f/0x1d0 drivers/vhost/vhost.c:1366
handle_rx+0x236/0x1430 drivers/vhost/net.c:1140
vhost_worker+0x215/0x340 drivers/vhost/vhost.c:372
kthread+0x468/0x490 kernel/kthread.c:327
ret_from_fork+0x1f/0x30
----------------
Code disassembly (best guess):
0: 84 00 test %al,(%rax)
2: 00 00 add %al,(%rax)
4: 00 00 add %al,(%rax)
6: 0f 1f 40 00 nopl 0x0(%rax)
a: be 0d 00 00 00 mov $0xd,%esi
f: 48 c7 c7 60 b0 b5 8c mov $0xffffffff8cb5b060,%rdi
16: e8 6f c7 4b 00 callq 0x4bc78a
1b: c3 retq
1c: cc int3
1d: cc int3
1e: cc int3
1f: cc int3
20: cc int3
21: cc int3
22: cc int3
23: cc int3
24: cc int3
25: cc int3
26: cc int3
27: cc int3
28: cc int3
29: cc int3
* 2a: 48 8b 04 24 mov (%rsp),%rax <-- trapping instruction
2e: 65 48 8b 0c 25 c0 6f mov %gs:0x26fc0,%rcx
35: 02 00
37: 65 8b 15 44 d6 7d 7e mov %gs:0x7e7dd644(%rip),%edx # 0x7e7dd682
3e: f7 .byte 0xf7
3f: c2 .byte 0xc2