INFO: task syz-executor.1:12313 blocked for more than 143 seconds.
Not tainted 5.16.0-rc8-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:26864 pid:12313 ppid: 3162 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+0xe9f/0x2490 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: 0033:0x7ff40166eadb
RSP: 002b:00007ffdde42d950 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007ff40166eadb
RDX: 00007ff4017d3690 RSI: ffffffffffffffff RDI: 0000000000000003
RBP: 00007ff4017d0960 R08: 0000000000000000 R09: 00007ff4017d3698
R10: 00007ffdde42da50 R11: 0000000000000293 R12: 0000000000135d4c
R13: 00007ffdde42da50 R14: 00007ff4017cef60 R15: 0000000000000032
Showing all locks held in the system:
1 lock held by khungtaskd/26:
#0: ffffffff8cb1de00 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3287:
#0: ffff88814ae52098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc90002b962e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6c5/0x1c60 drivers/tty/n_tty.c:2113
1 lock held by syz-executor.1/12313:
#0: ffff88809a980218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop_vq drivers/vhost/net.c:1359 [inline]
#0: ffff88809a980218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop+0x10c/0x1e0 drivers/vhost/net.c:1373
1 lock held by vhost-12315/12318:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 26 Comm: khungtaskd Not tainted 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+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: 4843 Comm: kworker/u4:0 Not tainted 5.16.0-rc8-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:hlock_class kernel/locking/lockdep.c:194 [inline]
RIP: 0010:mark_lock+0x15a/0x1e00 kernel/locking/lockdep.c:4583
Code: 09 00 00 00 83 da 00 41 bd 01 00 00 00 48 89 d0 48 89 54 24 10 89 d1 41 d3 e5 48 89 74 24 38 48 8d 5e 20 48 89 d8 48 c1 e8 03 <48> 89 44 24 18 42 8a 04 38 84 c0 0f 85 f7 0d 00 00 48 89 5c 24 08
RSP: 0018:ffffc90003187700 EFLAGS: 00000806
RAX: 1ffff1100ec3c89a RBX: ffff8880761e44d0 RCX: 0000000000000009
RDX: 0000000000000009 RSI: ffff8880761e44b0 RDI: ffff8880761e3a00
RBP: ffffc900031878f0 R08: dffffc0000000000 R09: fffffbfff1ff3df9
R10: fffffbfff1ff3df9 R11: 0000000000000000 R12: 1ffff92000630eec
R13: 0000000000000200 R14: ffff8880761e3a00 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c01eada260 CR3: 000000000c88e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
mark_usage kernel/locking/lockdep.c:4526 [inline]
__lock_acquire+0xd38/0x2b00 kernel/locking/lockdep.c:4981
lock_acquire+0x19f/0x4d0 kernel/locking/lockdep.c:5637
rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:268
rcu_read_lock include/linux/rcupdate.h:688 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline]
batadv_nc_worker+0xc8/0x5b0 net/batman-adv/network-coding.c:723
process_one_work+0x853/0x1140 kernel/workqueue.c:2298
worker_thread+0xac1/0x1320 kernel/workqueue.c:2445
kthread+0x468/0x490 kernel/kthread.c:327
ret_from_fork+0x1f/0x30
----------------
Code disassembly (best guess):
0: 09 00 or %eax,(%rax)
2: 00 00 add %al,(%rax)
4: 83 da 00 sbb $0x0,%edx
7: 41 bd 01 00 00 00 mov $0x1,%r13d
d: 48 89 d0 mov %rdx,%rax
10: 48 89 54 24 10 mov %rdx,0x10(%rsp)
15: 89 d1 mov %edx,%ecx
17: 41 d3 e5 shl %cl,%r13d
1a: 48 89 74 24 38 mov %rsi,0x38(%rsp)
1f: 48 8d 5e 20 lea 0x20(%rsi),%rbx
23: 48 89 d8 mov %rbx,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 48 89 44 24 18 mov %rax,0x18(%rsp) <-- trapping instruction
2f: 42 8a 04 38 mov (%rax,%r15,1),%al
33: 84 c0 test %al,%al
35: 0f 85 f7 0d 00 00 jne 0xe32
3b: 48 89 5c 24 08 mov %rbx,0x8(%rsp)