INFO: task syz-executor.5:9154 blocked for more than 143 seconds.
Not tainted 5.16.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:28144 pid: 9154 ppid: 3632 flags:0x00004002
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
exit_task_work include/linux/task_work.h:32 [inline]
do_exit+0xc14/0x2b40 kernel/exit.c:832
do_group_exit+0x125/0x310 kernel/exit.c:929
__do_sys_exit_group kernel/exit.c:940 [inline]
__se_sys_exit_group kernel/exit.c:938 [inline]
__x64_sys_exit_group+0x3a/0x50 kernel/exit.c:938
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fea50808eb9
RSP: 002b:00007fff2998d3a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007fea5091c03c RCX: 00007fea50808eb9
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 00007fea5086233e R08: 000000000000000c R09: 00007fea5091c030
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000000b
R13: 0000000000000001 R14: 00007fea5091c030 R15: 00007fff2998d5d0
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8bb84920 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
2 locks held by getty/3286:
#0: ffff88814ae1a098 (&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.5/9154:
#0: ffff888085700218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop_vq drivers/vhost/net.c:1359 [inline]
#0: ffff888085700218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop+0x142/0x270 drivers/vhost/net.c:1373
1 lock held by vhost-9155/9156:
2 locks held by syz-executor.5/9790:
#0: ffff8880856b0070 (&dev->mutex#4){+.+.}-{3:3}, at: vhost_net_set_features drivers/vhost/net.c:1645 [inline]
#0: ffff8880856b0070 (&dev->mutex#4){+.+.}-{3:3}, at: vhost_net_ioctl+0x19a/0x1740 drivers/vhost/net.c:1716
#1: ffff8880856b0218 (&vq->mutex){+.+.}-{3:3}, at: vhost_init_device_iotlb+0x133/0x290 drivers/vhost/vhost.c:1735
1 lock held by syz-executor.5/9791:
#0: ffff8880856b0070 (&dev->mutex#4){+.+.}-{3:3}, at: vhost_net_set_owner drivers/vhost/net.c:1674 [inline]
#0: ffff8880856b0070 (&dev->mutex#4){+.+.}-{3:3}, at: vhost_net_ioctl+0x3fe/0x1740 drivers/vhost/net.c:1732
1 lock held by vhost-9785/9786:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.16.0-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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 11673 Comm: kworker/u4:18 Not tainted 5.16.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:85 [inline]
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:102 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:128 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0xde/0x180 mm/kasan/generic.c:189
Code: 74 f2 48 89 c2 b8 01 00 00 00 48 85 d2 75 56 5b 5d 41 5c c3 48 85 d2 74 5e 48 01 ea eb 09 48 83 c0 01 48 39 d0 74 50 80 38 00 <74> f2 eb d4 41 bc 08 00 00 00 48 89 ea 45 29 dc 4d 8d 1c 2c eb 0c
RSP: 0018:ffffc900043a7a38 EFLAGS: 00000046
RAX: fffffbfff1ff475c RBX: fffffbfff1ff475d RCX: ffffffff815c3dfe
RDX: fffffbfff1ff475d RSI: 0000000000000008 RDI: ffffffff8ffa3ae0
RBP: fffffbfff1ff475c R08: 0000000000000000 R09: ffffffff8ffa3ae7
R10: fffffbfff1ff475c R11: 0000000000000000 R12: ffff88802e5b44b0
R13: ffff88802e5b3a00 R14: ffffffff8d92c7e8 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055f67f920600 CR3: 000000000b88e000 CR4: 0000000000350ee0
Call Trace:
instrument_atomic_read include/linux/instrumented.h:71 [inline]
test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline]
hlock_class kernel/locking/lockdep.c:199 [inline]
__lock_acquire+0x143e/0x5470 kernel/locking/lockdep.c:5023
lock_acquire kernel/locking/lockdep.c:5637 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
rcu_lock_acquire include/linux/rcupdate.h:268 [inline]
rcu_read_lock include/linux/rcupdate.h:694 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
batadv_nc_worker+0x12d/0xfa0 net/batman-adv/network-coding.c:719
process_one_work+0x9ac/0x1650 kernel/workqueue.c:2307
worker_thread+0x657/0x1110 kernel/workqueue.c:2454
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess):
0: 74 f2 je 0xfffffff4
2: 48 89 c2 mov %rax,%rdx
5: b8 01 00 00 00 mov $0x1,%eax
a: 48 85 d2 test %rdx,%rdx
d: 75 56 jne 0x65
f: 5b pop %rbx
10: 5d pop %rbp
11: 41 5c pop %r12
13: c3 retq
14: 48 85 d2 test %rdx,%rdx
17: 74 5e je 0x77
19: 48 01 ea add %rbp,%rdx
1c: eb 09 jmp 0x27
1e: 48 83 c0 01 add $0x1,%rax
22: 48 39 d0 cmp %rdx,%rax
25: 74 50 je 0x77
27: 80 38 00 cmpb $0x0,(%rax)
* 2a: 74 f2 je 0x1e <-- trapping instruction
2c: eb d4 jmp 0x2
2e: 41 bc 08 00 00 00 mov $0x8,%r12d
34: 48 89 ea mov %rbp,%rdx
37: 45 29 dc sub %r11d,%r12d
3a: 4d 8d 1c 2c lea (%r12,%rbp,1),%r11
3e: eb 0c jmp 0x4c