INFO: task syz-executor.2:30820 blocked for more than 143 seconds.
Not tainted 5.16.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:26416 pid:30820 ppid: 21395 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: 0033:0x7f1e78919adb
RSP: 002b:00007fff7ed7aeb0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f1e78919adb
RDX: 0000000000000000 RSI: 00007f1e786f0718 RDI: 0000000000000003
RBP: 00007f1e78a7b960 R08: 0000000000000000 R09: 0000000068962f6d
R10: 0000000000000000 R11: 0000000000000293 R12: 00000000001b74c0
R13: 00007fff7ed7afb0 R14: 00007fff7ed7afd0 R15: 0000000000000032
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8cb1de00 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3279:
#0: ffff88802413d098 (&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
5 locks held by kworker/u4:17/26881:
2 locks held by kworker/u4:19/26886:
1 lock held by syz-executor.2/30820:
#0: ffff888087510218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop_vq drivers/vhost/net.c:1359 [inline]
#0: ffff888087510218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop+0x10c/0x1e0 drivers/vhost/net.c:1373
1 lock held by vhost-30846/30855:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc7-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: 26881 Comm: kworker/u4:17 Not tainted 5.16.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:lockdep_recursion_inc kernel/locking/lockdep.c:433 [inline]
RIP: 0010:lock_is_held_type+0x6b/0x190 kernel/locking/lockdep.c:5679
Code: 25 c0 6f 02 00 41 83 bd 5c 0a 00 00 00 0f 85 e6 00 00 00 41 89 f6 49 89 ff 48 c7 04 24 00 00 00 00 9c 8f 04 24 4c 8b 24 24 fa <48> c7 c7 00 11 6f 8a e8 79 11 00 00 65 ff 05 82 fd f7 75 41 83 bd
RSP: 0018:ffffc900044979b8 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 00000000ffffffff RCX: 0000000080000001
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffffffff8cb1dd60
RBP: ffffc90004497a90 R08: dffffc0000000000 R09: fffffbfff1bfd59e
R10: fffffbfff1bfd59e R11: 0000000000000000 R12: 0000000000000246
R13: ffff888040330000 R14: 00000000ffffffff R15: ffffffff8cb1dd60
FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c009ed9000 CR3: 0000000079b82000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
lock_is_held include/linux/lockdep.h:283 [inline]
rcu_read_lock_sched_held+0x89/0x130 kernel/rcu/update.c:125
trace_lock_release+0x4f/0x150 include/trace/events/lock.h:58
lock_release+0x82/0x810 kernel/locking/lockdep.c:5648
rcu_read_unlock include/linux/rcupdate.h:721 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:416 [inline]
batadv_nc_worker+0x251/0x5b0 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: 25 c0 6f 02 00 and $0x26fc0,%eax
5: 41 83 bd 5c 0a 00 00 cmpl $0x0,0xa5c(%r13)
c: 00
d: 0f 85 e6 00 00 00 jne 0xf9
13: 41 89 f6 mov %esi,%r14d
16: 49 89 ff mov %rdi,%r15
19: 48 c7 04 24 00 00 00 movq $0x0,(%rsp)
20: 00
21: 9c pushfq
22: 8f 04 24 popq (%rsp)
25: 4c 8b 24 24 mov (%rsp),%r12
29: fa cli
* 2a: 48 c7 c7 00 11 6f 8a mov $0xffffffff8a6f1100,%rdi <-- trapping instruction
31: e8 79 11 00 00 callq 0x11af
36: 65 ff 05 82 fd f7 75 incl %gs:0x75f7fd82(%rip) # 0x75f7fdbf
3d: 41 rex.B
3e: 83 .byte 0x83
3f: bd .byte 0xbd