Bluetooth: hci1: command 0x0406 tx timeout
Bluetooth: hci3: command 0x0406 tx timeout
Bluetooth: hci2: command 0x0406 tx timeout
Bluetooth: hci4: command 0x0406 tx timeout
Bluetooth: hci5: command 0x0406 tx timeout
INFO: task syz-executor.3:10552 blocked for more than 140 seconds.
      Not tainted 4.19.150-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3  D29208 10552   6507 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x8e5/0x22e0 kernel/sched/core.c:3517
 schedule+0x8d/0x1b0 kernel/sched/core.c:3561
 request_wait_answer+0x3dc/0x750 fs/fuse/dev.c:485
 __fuse_request_send+0x123/0x1d0 fs/fuse/dev.c:505
 fuse_simple_request+0x2d2/0x6f0 fs/fuse/dev.c:576
 fuse_do_getattr+0x230/0xc40 fs/fuse/dir.c:927
 fuse_update_get_attr fs/fuse/dir.c:960 [inline]
 fuse_getattr+0x2c1/0x380 fs/fuse/dir.c:1838
 vfs_getattr_nosec+0xff/0x160 fs/stat.c:79
 vfs_getattr fs/stat.c:116 [inline]
 vfs_statx+0x15a/0x210 fs/stat.c:189
 vfs_stat include/linux/fs.h:3133 [inline]
 __do_sys_newstat fs/stat.c:337 [inline]
 __se_sys_newstat+0x96/0x120 fs/stat.c:333
 do_syscall_64+0xf9/0x670 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45de59
Code: 89 4c 24 78 48 8b 6c 24 58 48 83 c4 60 c3 48 89 4c 24 30 90 48 8d 05 f6 5c 61 01 48 89 04 24 e8 7d cd fa ff 48 8d 05 46 29 44 <00> 48 89 04 24 48 8b 05 eb 5c 61 01 48 89 44 24 08 8b 44 24 70 89
RSP: 002b:00007fed0e1aac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000004
RAX: ffffffffffffffda RBX: 0000000000035100 RCX: 000000000045de59
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200004c0
RBP: 000000000118c000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bfd4
R13: 00007ffca3cfbb9f R14: 00007fed0e1ab9c0 R15: 000000000118bfd4

Showing all locks held in the system:
1 lock held by khungtaskd/1095:
 #0: 0000000073b021b5 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x291 kernel/locking/lockdep.c:4440
1 lock held by in:imklog/6172:
 #0: 00000000da3b8d3f (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xe3/0x100 fs/file.c:767
2 locks held by agetty/6398:
 #0: 00000000eaf41452 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272
 #1: 00000000a3b498cd (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x18c0 drivers/tty/n_tty.c:2154

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

NMI backtrace for cpu 1
CPU: 1 PID: 1095 Comm: khungtaskd Not tainted 4.19.150-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x22c/0x33e lib/dump_stack.c:118
 nmi_cpu_backtrace.cold+0x18/0x3d lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1a6/0x1eb lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline]
 watchdog+0xa62/0x1020 kernel/hung_task.c:287
 kthread+0x33f/0x460 kernel/kthread.c:259
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 10 Comm: rcu_preempt Not tainted 4.19.150-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:lock_timer_base+0x8c/0x290 kernel/time/timer.c:950
Code: 4d 01 f7 e8 96 92 10 00 4c 89 ff e8 7e d8 4f 06 48 b9 00 00 00 00 00 fc ff df 49 89 c5 48 8b 44 24 08 48 c1 e8 03 80 3c 08 00 <0f> 85 74 01 00 00 48 8b 44 24 08 4c 89 28 41 0f b6 04 24 84 c0 74
RSP: 0018:ffff8880a9a37b20 EFLAGS: 00000046
RAX: 1ffff11015346f76 RBX: 0000000009000000 RCX: dffffc0000000000
RDX: 1ffff11015c4474a RSI: 0000000000000004 RDI: ffff8880ae223a40
RBP: ffff8880a9a37cc0 R08: 0000000000000001 R09: ffffed1015c44748
R10: ffff8880ae223a43 R11: 0000000000000000 R12: ffffed1015346f9c
R13: 0000000000000286 R14: 0000000000023a40 R15: ffff8880ae223a40
FS:  0000000000000000(0000) GS:ffff8880ae200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcaae18e000 CR3: 0000000093902000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 try_to_del_timer_sync+0x7a/0x110 kernel/time/timer.c:1237
 del_timer_sync+0x1a4/0x2b0 kernel/time/timer.c:1305
 schedule_timeout+0x53e/0x1320 kernel/time/timer.c:1826
 rcu_gp_kthread+0xdee/0x2660 kernel/rcu/tree.c:2202
 kthread+0x33f/0x460 kernel/kthread.c:259
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415