Bluetooth: hci3 command 0x0406 tx timeout
Bluetooth: hci1 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.3:10953 blocked for more than 140 seconds.
      Not tainted 4.14.218-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3  D27472 10953   8013 0x00000004
Call Trace:
 context_switch syzkaller/managers/linux-4-14/kernel/kernel/sched/core.c:2808 [inline]
 __schedule+0x88b/0x1de0 syzkaller/managers/linux-4-14/kernel/kernel/sched/core.c:3384
 schedule+0x8d/0x1b0 syzkaller/managers/linux-4-14/kernel/kernel/sched/core.c:3428
 schedule_timeout+0x80a/0xe90 syzkaller/managers/linux-4-14/kernel/kernel/time/timer.c:1724
 do_wait_for_common syzkaller/managers/linux-4-14/kernel/kernel/sched/completion.c:91 [inline]
 __wait_for_common syzkaller/managers/linux-4-14/kernel/kernel/sched/completion.c:112 [inline]
 wait_for_common+0x272/0x430 syzkaller/managers/linux-4-14/kernel/kernel/sched/completion.c:123
 flush_work+0x3fe/0x770 syzkaller/managers/linux-4-14/kernel/kernel/workqueue.c:2893
 __cancel_work_timer+0x321/0x460 syzkaller/managers/linux-4-14/kernel/kernel/workqueue.c:2964
 p9_conn_destroy syzkaller/managers/linux-4-14/kernel/net/9p/trans_fd.c:898 [inline]
 p9_fd_close+0x28d/0x420 syzkaller/managers/linux-4-14/kernel/net/9p/trans_fd.c:925
 p9_client_create+0x736/0x12c0 syzkaller/managers/linux-4-14/kernel/net/9p/client.c:1095
 v9fs_session_init+0x1c5/0x1540 syzkaller/managers/linux-4-14/kernel/fs/9p/v9fs.c:422
 v9fs_mount+0x73/0x860 syzkaller/managers/linux-4-14/kernel/fs/9p/vfs_super.c:135
 mount_fs+0x92/0x2a0 syzkaller/managers/linux-4-14/kernel/fs/super.c:1237
 vfs_kern_mount.part.0+0x5b/0x470 syzkaller/managers/linux-4-14/kernel/fs/namespace.c:1046
 vfs_kern_mount syzkaller/managers/linux-4-14/kernel/fs/namespace.c:1036 [inline]
 do_new_mount syzkaller/managers/linux-4-14/kernel/fs/namespace.c:2549 [inline]
 do_mount+0xe53/0x2a00 syzkaller/managers/linux-4-14/kernel/fs/namespace.c:2879
 SYSC_mount syzkaller/managers/linux-4-14/kernel/fs/namespace.c:3095 [inline]
 SyS_mount+0xa8/0x120 syzkaller/managers/linux-4-14/kernel/fs/namespace.c:3072
 do_syscall_64+0x1d5/0x640 syzkaller/managers/linux-4-14/kernel/arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x465b09
RSP: 002b:00007f100fef1188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 000000000056c0b0 RCX: 0000000000465b09
RDX: 0000000020000080 RSI: 0000000020000300 RDI: 0000000000000000
RBP: 00000000004b069f R08: 0000000020000740 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c0b0
R13: 00007fff61b0c6bf R14: 00007f100fef1300 R15: 0000000000022000

Showing all locks held in the system:
1 lock held by khungtaskd/1532:
 #0:  (tasklist_lock){.+.+}, at: [<ffffffff86fedc17>] debug_show_all_locks+0x7c/0x21a syzkaller/managers/linux-4-14/kernel/kernel/locking/lockdep.c:4548
2 locks held by kworker/0:3/8443:
 #0:  ("events"){+.+.}, at: [<ffffffff81363810>] process_one_work+0x6b0/0x14a0 syzkaller/managers/linux-4-14/kernel/kernel/workqueue.c:2087
 #1:  ((&m->rq)){+.+.}, at: [<ffffffff81363846>] process_one_work+0x6e6/0x14a0 syzkaller/managers/linux-4-14/kernel/kernel/workqueue.c:2091

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

NMI backtrace for cpu 1
CPU: 1 PID: 1532 Comm: khungtaskd Not tainted 4.14.218-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack syzkaller/managers/linux-4-14/kernel/lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 syzkaller/managers/linux-4-14/kernel/lib/dump_stack.c:58
 nmi_cpu_backtrace.cold+0x57/0x93 syzkaller/managers/linux-4-14/kernel/lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x13a/0x180 syzkaller/managers/linux-4-14/kernel/lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace syzkaller/managers/linux-4-14/kernel/./include/linux/nmi.h:140 [inline]
 check_hung_uninterruptible_tasks syzkaller/managers/linux-4-14/kernel/kernel/hung_task.c:195 [inline]
 watchdog+0x5b9/0xb40 syzkaller/managers/linux-4-14/kernel/kernel/hung_task.c:274
 kthread+0x30d/0x420 syzkaller/managers/linux-4-14/kernel/kernel/kthread.c:232
 ret_from_fork+0x24/0x30 syzkaller/managers/linux-4-14/kernel/arch/x86/entry/entry_64.S:404
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4620 Comm: systemd-journal Not tainted 4.14.218-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8880a174a6c0 task.stack: ffff8880a1750000
RIP: 0010:__nr_to_section syzkaller/managers/linux-4-14/kernel/./include/linux/mmzone.h:1167 [inline]
RIP: 0010:__pfn_to_section syzkaller/managers/linux-4-14/kernel/./include/linux/mmzone.h:1232 [inline]
RIP: 0010:get_pageblock_bitmap syzkaller/managers/linux-4-14/kernel/mm/page_alloc.c:381 [inline]
RIP: 0010:__get_pfnblock_flags_mask syzkaller/managers/linux-4-14/kernel/mm/page_alloc.c:416 [inline]
RIP: 0010:get_pfnblock_migratetype syzkaller/managers/linux-4-14/kernel/mm/page_alloc.c:435 [inline]
RIP: 0010:__free_pages_ok+0x287/0xeb0 syzkaller/managers/linux-4-14/kernel/mm/page_alloc.c:1265
RSP: 0018:ffff8880a1757a20 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: 0000000000000013 RCX: 0000000000000000
RDX: 1ffff11047ffe600 RSI: 00000000000000ff RDI: ffffed1013b5ec00
RBP: ffffea000276bd00 R08: ffffed1013b5e800 R09: ffffed1013b5e800
R10: 0000000000000000 R11: ffff8880a174a6c0 R12: 0000000000000001
R13: 0000000000000002 R14: 000000000009daf4 R15: ffff88813fffa000
FS:  00007fc0b419d8c0(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc0b15c5000 CR3: 00000000a17e0000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 slab_destroy syzkaller/managers/linux-4-14/kernel/mm/slab.c:1723 [inline]
 slabs_destroy+0x90/0xd0 syzkaller/managers/linux-4-14/kernel/mm/slab.c:1739
 cache_flusharray syzkaller/managers/linux-4-14/kernel/mm/slab.c:3483 [inline]
 ___cache_free+0x213/0x2c0 syzkaller/managers/linux-4-14/kernel/mm/slab.c:3525
 qlink_free syzkaller/managers/linux-4-14/kernel/mm/kasan/quarantine.c:147 [inline]
 qlist_free_all+0x79/0x140 syzkaller/managers/linux-4-14/kernel/mm/kasan/quarantine.c:166
 quarantine_reduce+0x185/0x200 syzkaller/managers/linux-4-14/kernel/mm/kasan/quarantine.c:259
 kasan_kmalloc+0xa2/0x160 syzkaller/managers/linux-4-14/kernel/mm/kasan/kasan.c:536
 slab_post_alloc_hook syzkaller/managers/linux-4-14/kernel/mm/slab.h:442 [inline]
 slab_alloc syzkaller/managers/linux-4-14/kernel/mm/slab.c:3390 [inline]
 kmem_cache_alloc+0x111/0x3c0 syzkaller/managers/linux-4-14/kernel/mm/slab.c:3550
 getname_flags+0xc8/0x550 syzkaller/managers/linux-4-14/kernel/fs/namei.c:138
 do_sys_open+0x1ce/0x410 syzkaller/managers/linux-4-14/kernel/fs/open.c:1075
 do_syscall_64+0x1d5/0x640 syzkaller/managers/linux-4-14/kernel/arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7fc0b372d840
RSP: 002b:00007ffc44d98078 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007ffc44d98380 RCX: 00007fc0b372d840
RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 000056216b766df0
RBP: 000000000000000d R08: 000000000000ffc0 R09: 00000000ffffffff
R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff
R13: 000056216b759040 R14: 00007ffc44d98340 R15: 000056216b766f60
Code: 74 38 4c 89 f0 48 c1 e8 17 4d 8d 3c c7 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bd 0a 00 00 4d 8b 3f <4d> 85 ff 74 0a 0f b6 db 48 c1 e3 04 49 01 df 49 8d 7f 08 48 b8