INFO: task syz.2.3:5919 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.3         state:D stack:13800 pid:5919  tgid:5918  ppid:5847   task_flags:0x400140 flags:0x00080003
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/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7eccb8ec29
RSP: 002b:00007f7ecda92038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f7eccdd5fa0 RCX: 00007f7eccb8ec29
RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000007
RBP: 00007f7eccc11e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000fffa83 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7eccdd6038 R14: 00007f7eccdd5fa0 R15: 00007ffcb061ecb8
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e33d320 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5675:
 #0: ffff888024a420a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900029032f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400
2 locks held by syz.2.3/5919:
 #0: ffff8880250b0420 (sb_writers#15){.+.+}-{0:0}, at: direct_splice_actor+0x49/0x160
 #1: ffff888111d308d0 (&sb->s_type->i_mutex_key#23){++++}-{4:4}, at: bch2_direct_write+0x192/0x2ce0
2 locks held by syz.2.3/5963:
2 locks held by kworker/u12:3/5966:
1 lock held by syz-executor/7579:
 #0: ffffffff8e342db8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2f6/0x730
1 lock held by syz.2.281/8522:
1 lock held by syz.1.283/8541:
 #0: ffff888033198420 (sb_writers#32){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90

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

NMI backtrace for cpu 1
CPU: 1 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+0xf60/0xfa0
 kthread+0x711/0x8a0
 ret_from_fork+0x4bc/0x870
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 36 Comm: kworker/u10:1 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: events_unbound cfg80211_wiphy_work
RIP: 0010:lockdep_hardirqs_on_prepare+0x60/0x2a0
Code: 85 8b 01 00 00 65 8b 05 2e 9b 24 11 85 c0 0f 85 7c 01 00 00 65 8b 05 a7 97 24 11 85 c0 0f 85 6d 01 00 00 83 3d e0 ad 2f 18 00 <75> 3e 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 0f
RSP: 0018:ffffc900006aeb60 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000a06 RCX: 918ddc3ae8e81800
RDX: 0000000000000000 RSI: ffffffff8c03dac0 RDI: ffffffff8c03da80
RBP: ffffc900006aec20 R08: ffffffff8fc35777 R09: 1ffffffff1f86aee
R10: dffffc0000000000 R11: fffffbfff1f86aef R12: dffffc0000000000
R13: ffff88803eec1268 R14: ffffffff99f8d690 R15: 1ffff920000d5d74
FS:  0000000000000000(0000) GS:ffff8880b83fc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffeac5a6be8 CR3: 0000000108016000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 trace_hardirqs_on+0x28/0x40
 _raw_spin_unlock_irqrestore+0x85/0x110
 debug_object_activate+0x2e2/0x420
 kvfree_call_rcu+0xc4/0x4c0
 cfg80211_update_known_bss+0x830/0x1590
 __cfg80211_bss_update+0x147/0x2120
 cfg80211_inform_single_bss_data+0xba9/0x1ac0
 cfg80211_inform_bss_data+0x203/0x3b40
 cfg80211_inform_bss_frame_data+0x3d7/0x730
 ieee80211_bss_info_update+0x749/0x9e0
 ieee80211_ibss_rx_queued_mgmt+0xa4e/0x2af0
 ieee80211_iface_work+0x85f/0x12d0
 cfg80211_wiphy_work+0x2bb/0x470
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x4bc/0x870
 ret_from_fork_asm+0x1a/0x30
 </TASK>
