INFO: task syz-executor.3:19114 can't die for more than 143 seconds.
task:syz-executor.3 state:D stack:28112 pid:19114 ppid: 3715 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: 0033:0x7fd69c7c1c2b
RSP: 002b:00007ffceaf216b0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007fd69c7c1c2b
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000003
RBP: 00007fd69c923960 R08: 0000000000000000 R09: 00007ffceafed080
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000231483
R13: 00007ffceaf217b0 R14: 00007ffceaf217d0 R15: 0000000000000032
INFO: task syz-executor.3:19114 blocked for more than 143 seconds.
Not tainted 5.16.0-next-20220116-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:28112 pid:19114 ppid: 3715 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: 0033:0x7fd69c7c1c2b
RSP: 002b:00007ffceaf216b0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007fd69c7c1c2b
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000003
RBP: 00007fd69c923960 R08: 0000000000000000 R09: 00007ffceafed080
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000231483
R13: 00007ffceaf217b0 R14: 00007ffceaf217d0 R15: 0000000000000032
Showing all locks held in the system:
1 lock held by khungtaskd/26:
#0: ffffffff8bb833a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6460
2 locks held by getty/3285:
#0: ffff8880242ab098 (&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.3/19114:
#0: ffff888073e40218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop_vq drivers/vhost/net.c:1359 [inline]
#0: ffff888073e40218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop+0x142/0x270 drivers/vhost/net.c:1373
1 lock held by vhost-19117/19119:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 26 Comm: khungtaskd Not tainted 5.16.0-next-20220116-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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 1068 Comm: kworker/u4:5 Not tainted 5.16.0-next-20220116-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:trace_lock_release include/trace/events/lock.h:58 [inline]
RIP: 0010:lock_release+0x516/0x720 kernel/locking/lockdep.c:5650
Code: 14 11 38 d0 7c 08 84 d2 0f 85 da 01 00 00 44 8b 05 c7 7e 37 0c 45 85 c0 0f 85 a5 fe ff ff e9 c1 02 b8 07 65 ff 05 2a 2f a5 7e <48> 8b 05 c3 ef 22 0c e8 9e ea 05 00 85 c0 74 17 65 ff 0d 13 2f a5
RSP: 0018:ffffc90005217bc0 EFLAGS: 00000283
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff815d3c21
RDX: fffffbfff1b29183 RSI: 0000000000000008 RDI: ffffffff8d948c10
RBP: 1ffff92000a42f7a R08: 0000000000000000 R09: ffffffff8d948c17
R10: fffffbfff1b29182 R11: 0000000000000000 R12: ffffffff8bb833a0
R13: 0000000000000000 R14: dffffc0000000000 R15: 00000000000002a2
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c01940ee08 CR3: 0000000022933000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
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):
0: 14 11 adc $0x11,%al
2: 38 d0 cmp %dl,%al
4: 7c 08 jl 0xe
6: 84 d2 test %dl,%dl
8: 0f 85 da 01 00 00 jne 0x1e8
e: 44 8b 05 c7 7e 37 0c mov 0xc377ec7(%rip),%r8d # 0xc377edc
15: 45 85 c0 test %r8d,%r8d
18: 0f 85 a5 fe ff ff jne 0xfffffec3
1e: e9 c1 02 b8 07 jmpq 0x7b802e4
23: 65 ff 05 2a 2f a5 7e incl %gs:0x7ea52f2a(%rip) # 0x7ea52f54
* 2a: 48 8b 05 c3 ef 22 0c mov 0xc22efc3(%rip),%rax # 0xc22eff4 <-- trapping instruction
31: e8 9e ea 05 00 callq 0x5ead4
36: 85 c0 test %eax,%eax
38: 74 17 je 0x51
3a: 65 gs
3b: ff .byte 0xff
3c: 0d .byte 0xd
3d: 13 2f adc (%rdi),%ebp
3f: a5 movsl %ds:(%rsi),%es:(%rdi)