INFO: task syz.9.1435:23127 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.9.1435      state:D stack:12952 pid:23127 tgid:23126 ppid:18679  task_flags:0x400140 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_write_slowpath+0x872/0xfe0
 down_write+0x1ab/0x1f0
 bch2_direct_write+0x192/0x2ce0
 bch2_write_iter+0x18f/0x2b90
 iter_file_splice_write+0x975/0x10e0
 direct_splice_actor+0x101/0x160
 splice_direct_to_actor+0x5a8/0xcc0
 do_splice_direct+0x181/0x270
 do_sendfile+0x4da/0x7e0
 __se_sys_sendfile64+0x13e/0x190
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f65b058ebe9
RSP: 002b:00007f65b1462038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f65b07b5fa0 RCX: 00007f65b058ebe9
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 0000000000000008
RBP: 00007f65b0611e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000ff7e82 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f65b07b6038 R14: 00007f65b07b5fa0 R15: 00007ffd5838f4b8
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 34 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250
 nmi_cpu_backtrace+0x39e/0x3d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 watchdog+0xf93/0xfe0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 27 Comm: kworker/u10:0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: loop9 loop_rootcg_workfn
RIP: 0010:update_se+0x12/0x5f0
Code: 48 83 ee 80 5b eb 11 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41 57 41 56 41 55 41 54 53 48 83 ec 18 48 89 34 24 <49> 89 fc 48 bb 00 00 00 00 00 fc ff df 48 c7 c0 70 b4 a3 8f 48 c1
RSP: 0018:ffffc9000060f0d0 EFLAGS: 00000082
RAX: 1ffff11026cc7413 RBX: ffff8881006cba00 RCX: dffffc0000000000
RDX: 0000000000000009 RSI: ffff8881006cba00 RDI: ffff888136639f80
RBP: dffffc0000000000 R08: ffffffff8fa38337 R09: 1ffffffff1f47066
R10: dffffc0000000000 R11: fffffbfff1f47067 R12: ffff88813663a1b8
R13: 1ffff11026cc7437 R14: ffff88813663a040 R15: ffff88813663a098
FS:  0000000000000000(0000) GS:ffff8881a3c1b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f66883eb000 CR3: 0000000020f5e000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 update_curr+0x75/0x730
 enqueue_entity+0x5f/0x1120
 enqueue_task_fair+0x25a/0x1470
 enqueue_task+0x75/0x420
 ttwu_do_activate+0x1f3/0x870
 try_to_wake_up+0x721/0x12b0
 raise_softirq+0xa0/0x120
 blk_mq_complete_request_remote+0x6f7/0xa50
 blk_mq_complete_request+0x19/0xa0
 lo_rw_aio+0xd75/0xfa0
 loop_process_work+0x835/0xf90
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
