INFO: task syz-executor.2:14447 can't die for more than 143 seconds.
task:syz-executor.2 state:D stack:27456 pid:14447 ppid: 13145 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4986 [inline]
__schedule+0xab2/0x4e90 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:311
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_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f386e084c2b
RSP: 002b:00007ffe945e1030 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f386e084c2b
RDX: 00007f386e1e9690 RSI: ffffffffffffffff RDI: 0000000000000003
RBP: 00007f386e1e6960 R08: 0000000000000000 R09: 00007f386e1e9698
R10: 00007ffe945e1130 R11: 0000000000000293 R12: 00000000000aa9f4
R13: 00007ffe945e1130 R14: 00007f386e1e4f60 R15: 0000000000000032
INFO: task syz-executor.2:14447 blocked for more than 143 seconds.
Not tainted 5.16.0-next-20220113-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:27456 pid:14447 ppid: 13145 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4986 [inline]
__schedule+0xab2/0x4e90 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:311
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_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f386e084c2b
RSP: 002b:00007ffe945e1030 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f386e084c2b
RDX: 00007f386e1e9690 RSI: ffffffffffffffff RDI: 0000000000000003
RBP: 00007f386e1e6960 R08: 0000000000000000 R09: 00007f386e1e9698
R10: 00007ffe945e1130 R11: 0000000000000293 R12: 00000000000aa9f4
R13: 00007ffe945e1130 R14: 00007f386e1e4f60 R15: 0000000000000032
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8bb833a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6460
2 locks held by getty/3281:
#0: ffff88814adf8098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc90002b632e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2077
1 lock held by syz-executor.2/14447:
#0: ffff888029380218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop_vq drivers/vhost/net.c:1359 [inline]
#0: ffff888029380218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop+0x142/0x270 drivers/vhost/net.c:1373
1 lock held by vhost-14452/14453:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.16.0-next-20220113-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:256 [inline]
watchdog+0xcb7/0xed0 kernel/hung_task.c:413
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: 3913 Comm: kworker/u4:7 Not tainted 5.16.0-next-20220113-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:__lock_release kernel/locking/lockdep.c:5344 [inline]
RIP: 0010:lock_release+0x302/0x720 kernel/locking/lockdep.c:5659
Code: 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 aa 03 00 00 49 8d bf 58 0a 00 00 48 8b 1b 48 b8 00 00 00 00 00 fc ff df 48 89 fa <48> c1 ea 03 80 3c 02 00 0f 85 a6 03 00 00 41 8d 45 ff 49 89 9f 58
RSP: 0018:ffffc90004a27bc0 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: 95fd271dac299683 RCX: ffffc90004a27c10
RDX: ffff888028da6218 RSI: 0000000000000000 RDI: ffff888028da6218
RBP: 1ffff92000944f7a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000002
R13: 0000000000000003 R14: ffff888028da6220 R15: ffff888028da57c0
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c011730f08 CR3: 000000007e1cf000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_lock_release include/linux/rcupdate.h:273 [inline]
rcu_read_unlock include/linux/rcupdate.h:727 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline]
batadv_nc_worker+0x86b/0xfa0 net/batman-adv/network-coding.c:719
process_one_work+0x996/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e9/0x3a0 kernel/kthread.c:377
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess), 5 bytes skipped:
0: 48 c1 ea 03 shr $0x3,%rdx
4: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)
8: 0f 85 aa 03 00 00 jne 0x3b8
e: 49 8d bf 58 0a 00 00 lea 0xa58(%r15),%rdi
15: 48 8b 1b mov (%rbx),%rbx
18: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
1f: fc ff df
22: 48 89 fa mov %rdi,%rdx
* 25: 48 c1 ea 03 shr $0x3,%rdx <-- trapping instruction
29: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)
2d: 0f 85 a6 03 00 00 jne 0x3d9
33: 41 8d 45 ff lea -0x1(%r13),%eax
37: 49 rex.WB
38: 89 .byte 0x89
39: 9f lahf
3a: 58 pop %rax