IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready
Bluetooth: hci7 command 0x0409 tx timeout
Bluetooth: hci7 command 0x041b tx timeout
Bluetooth: hci7 command 0x040f tx timeout
Bluetooth: hci7 command 0x0419 tx timeout
INFO: task syz-executor.4:9731 blocked for more than 140 seconds.
      Not tainted 4.14.299-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4  D28072  9731   8015 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2811 [inline]
 __schedule+0x88b/0x1de0 kernel/sched/core.c:3387
 schedule+0x8d/0x1b0 kernel/sched/core.c:3431
 schedule_timeout+0x80a/0xe90 kernel/time/timer.c:1724
 do_wait_for_common kernel/sched/completion.c:91 [inline]
 __wait_for_common kernel/sched/completion.c:112 [inline]
 wait_for_common+0x272/0x430 kernel/sched/completion.c:123
 flush_work+0x3fe/0x770 kernel/workqueue.c:2894
 __cancel_work_timer+0x321/0x460 kernel/workqueue.c:2965
 p9_conn_destroy net/9p/trans_fd.c:898 [inline]
 p9_fd_close+0x28d/0x420 net/9p/trans_fd.c:925
 p9_client_create+0x736/0x12c0 net/9p/client.c:1093
 v9fs_session_init+0x1c5/0x1540 fs/9p/v9fs.c:422
 v9fs_mount+0x73/0x860 fs/9p/vfs_super.c:135
 mount_fs+0x92/0x2a0 fs/super.c:1237
 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046
 vfs_kern_mount fs/namespace.c:1036 [inline]
 do_new_mount fs/namespace.c:2572 [inline]
 do_mount+0xe65/0x2a30 fs/namespace.c:2905
 SYSC_mount fs/namespace.c:3121 [inline]
 SyS_mount+0xa8/0x120 fs/namespace.c:3098
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x5e/0xd3

Showing all locks held in the system:
2 locks held by kworker/1:1/23:
 #0:  ("events"){+.+.}, at: [<ffffffff81365eb0>] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088
 #1:  ((&m->rq)){+.+.}, at: [<ffffffff81365ee6>] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092
1 lock held by khungtaskd/1532:
 #0:  (tasklist_lock){.+.+}, at: [<ffffffff8702a1b9>] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4548
2 locks held by kworker/1:2/4627:
 #0:  ("events"){+.+.}, at: [<ffffffff81365eb0>] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088
 #1:  ((&m->rq)){+.+.}, at: [<ffffffff81365ee6>] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092
1 lock held by in:imklog/7658:
 #0:  (&f->f_pos_lock){+.+.}, at: [<ffffffff818d8b5b>] __fdget_pos+0x1fb/0x2b0 fs/file.c:819
2 locks held by kworker/0:3/8027:
 #0:  ("events"){+.+.}, at: [<ffffffff81365eb0>] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088
 #1:  ((&m->rq)){+.+.}, at: [<ffffffff81365ee6>] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092

=============================================

NMI backtrace for cpu 0
CPU: 0 PID: 1532 Comm: khungtaskd Not tainted 4.14.299-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x13a/0x180 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline]
 watchdog+0x5b9/0xb40 kernel/hung_task.c:274
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 2856 Comm: kworker/u4:4 Not tainted 4.14.299-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Workqueue: bat_events batadv_nc_worker
task: ffff8880ac066040 task.stack: ffff8880ac090000
RIP: 0010:__lock_acquire+0x2c2/0x3f20 kernel/locking/lockdep.c:3407
RSP: 0018:ffff8880ac097aa8 EFLAGS: 00000803
RAX: 0000000000000002 RBX: 0000000000000000 RCX: 0000000000000004
RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffff8880ac0668c8
RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000000a R11: ffff8880ac066040 R12: ffffffff88f78600
R13: 0000000000000000 R14: 0000000000000011 R15: ffffffff8becbdc0
FS:  0000000000000000(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1a34572028 CR3: 00000000965ec000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998
 rcu_lock_acquire include/linux/rcupdate.h:242 [inline]
 rcu_read_lock include/linux/rcupdate.h:629 [inline]
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:418 [inline]
 batadv_nc_worker+0x124/0xc50 net/batman-adv/network-coding.c:728
 process_one_work+0x793/0x14a0 kernel/workqueue.c:2117
 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406
Code: b0 0c 00 00 49 8d bb 88 08 00 00 48 2d 40 7b 9e 8b 48 c1 f8 04 48 89 7c 24 10 69 c0 3d cf f3 3c 44 8d 70 01 8b 04 24 4c 8d 14 80 <49> c1 e2 03 85 c0 74 4a 4e 8d 6c 17 d8 48 b9 00 00 00 00 00 fc