INFO: task syz-executor.3:11629 blocked for more than 143 seconds.
Tainted: G S 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:28144 pid:11629 ppid: 8500 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4900 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
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:280
task_work_run+0xdd/0x1a0 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+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_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f4a71094adb
RSP: 002b:00007ffd6bbcc1a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f4a71094adb
RDX: 00007f4a711f9690 RSI: ffffffffffffffff RDI: 0000000000000003
RBP: 00007f4a711f6960 R08: 0000000000000000 R09: 00007f4a711f9698
R10: 00007ffd6bbcc2a0 R11: 0000000000000293 R12: 0000000000088b6d
R13: 00007ffd6bbcc2a0 R14: 00007f4a711f4f60 R15: 0000000000000032
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8bb83da0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
2 locks held by getty/3285:
#0: ffff88814a2dc098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252
#1: ffffc90002b962e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2113
1 lock held by syz-executor.3/11629:
#0: ffff8880275b0218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop_vq drivers/vhost/net.c:1359 [inline]
#0: ffff8880275b0218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop+0x142/0x270 drivers/vhost/net.c:1373
1 lock held by vhost-11630/11631:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Tainted: G S 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+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1b3/0x230 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+0xc1d/0xf50 kernel/hung_task.c:295
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 11631 Comm: vhost-11630 Tainted: G S 5.16.0-rc8-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:iotlb_access_ok+0x283/0x3e0 drivers/vhost/vhost.c:1347
Code: 0f 84 ea 00 00 00 e8 4c e0 a5 fa 48 8d 7b 38 48 ba 00 00 00 00 00 fc ff df 48 89 f8 48 c1 e8 03 80 3c 10 00 0f 85 df 00 00 00 <4c> 03 63 38 48 89 ee 48 8b 3c 24 4d 89 e7 e8 8a e3 a5 fa 49 29 ef
RSP: 0018:ffffc90004137b28 EFLAGS: 00000246
RAX: 1ffff1100e848bd7 RBX: ffff888074245e80 RCX: ffffc9000e38a000
RDX: dffffc0000000000 RSI: ffffffff86d1b7f4 RDI: ffff888074245eb8
RBP: 0000000000000000 R08: 0000000000000000 R09: ffff8880275b01bb
R10: ffffffff86d1b7e6 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000003 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c01e72f200 CR3: 00000000225bb000 CR4: 0000000000350ef0
Call Trace:
vq_meta_prefetch+0xbc/0x280 drivers/vhost/vhost.c:1366
handle_rx+0x145/0x1b40 drivers/vhost/net.c:1140
vhost_worker+0x23d/0x3d0 drivers/vhost/vhost.c:372
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess):
0: 0f 84 ea 00 00 00 je 0xf0
6: e8 4c e0 a5 fa callq 0xfaa5e057
b: 48 8d 7b 38 lea 0x38(%rbx),%rdi
f: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx
16: fc ff df
19: 48 89 f8 mov %rdi,%rax
1c: 48 c1 e8 03 shr $0x3,%rax
20: 80 3c 10 00 cmpb $0x0,(%rax,%rdx,1)
24: 0f 85 df 00 00 00 jne 0x109
* 2a: 4c 03 63 38 add 0x38(%rbx),%r12 <-- trapping instruction
2e: 48 89 ee mov %rbp,%rsi
31: 48 8b 3c 24 mov (%rsp),%rdi
35: 4d 89 e7 mov %r12,%r15
38: e8 8a e3 a5 fa callq 0xfaa5e3c7
3d: 49 29 ef sub %rbp,%r15