INFO: task syz.2.19:6518 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.19        state:D stack:23896 pid:6518  tgid:6517  ppid:6355   task_flags:0x400140 flags:0x00080003
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5264 [inline]
 __schedule+0x1848/0x4ec0 kernel/sched/core.c:6872
 __schedule_loop kernel/sched/core.c:6954 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6969
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7026
 rwsem_down_read_slowpath+0x5fd/0x8f0 kernel/locking/rwsem.c:1086
 __down_read_common kernel/locking/rwsem.c:1261 [inline]
 __down_read kernel/locking/rwsem.c:1274 [inline]
 down_read_nested+0x9a/0x2f0 kernel/locking/rwsem.c:1663
 dbAlloc+0x3a7/0xba0 fs/jfs/jfs_dmap.c:790
 diNewExt+0x9af/0x3150 fs/jfs/jfs_imap.c:2261
 diAllocExt fs/jfs/jfs_imap.c:1952 [inline]
 diAllocAG+0xe86/0x1df0 fs/jfs/jfs_imap.c:1669
 diAlloc+0x1d5/0x1680 fs/jfs/jfs_imap.c:1590
 ialloc+0x8c/0x8f0 fs/jfs/jfs_inode.c:56
 jfs_mkdir+0x193/0xa70 fs/jfs/namei.c:225
 vfs_mkdir+0x360/0x580 fs/namei.c:4453
 do_mkdirat+0x28a/0x650 fs/namei.c:4486
 __do_sys_mkdirat fs/namei.c:4503 [inline]
 __se_sys_mkdirat fs/namei.c:4501 [inline]
 __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4501
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0f7a58efc9
RSP: 002b:00007f0f7b3f0038 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f0f7a7e5fa0 RCX: 00007f0f7a58efc9
RDX: 0000000000000408 RSI: 0000200000000300 RDI: 0000000000000004
RBP: 00007f0f7a611f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0f7a7e6038 R14: 00007f0f7a7e5fa0 R15: 00007ffc19921c78
 </TASK>

Showing all locks held in the system:
5 locks held by kworker/u8:0/12:
3 locks held by kworker/u8:1/13:
1 lock held by khungtaskd/31:
 #0: ffffffff8df3b720 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 #0: ffffffff8df3b720 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:867 [inline]
 #0: ffffffff8df3b720 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
2 locks held by kworker/u8:2/36:
4 locks held by kworker/u9:0/52:
 #0: ffff88807c8db948 ((wq_completion)hci12#2){+.+.}-{0:0}, at: process_one_work+0x841/0x15d0 kernel/workqueue.c:3242
 #1: ffffc90000bd7b80 ((work_completion)(&hdev->rx_work)
){+.+.}-{0:0}
, at: process_one_work+0x868/0x15d0 kernel/workqueue.c:3243
 #2: 
ffff888031c900c0
 (
&hdev->lock
){+.+.}-{4:4}
, at: hci_remote_features_evt+0x9b/0x910 net/bluetooth/hci_event.c:3699
 #3: 
ffffffff8f4404e8
 (
hci_cb_list_lock
){+.+.}-{4:4}
, at: hci_connect_cfm include/net/bluetooth/hci_core.h:2118 [inline]
, at: hci_remote_features_evt+0x516/0x910 net/bluetooth/hci_event.c:3733
3 locks held by kworker/u8:5/747:
 #0: