INFO: task bch-reclaim/loo:15604 blocked for more than 143 seconds.
      Not tainted 6.16.0-syzkaller-11895-gcca7a0aae895 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:bch-reclaim/loo state:D stack:18824 pid:15604 tgid:15604 ppid:2      task_flags:0x200040 flags:0x00004000
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7e6/0x1360
 bch2_journal_reclaim_thread+0x16b/0x4f0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e139ee0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5673:
 #0: ffff88810fc650a0 (&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
6 locks held by syz.5.1435/15596:
 #0: ffff88803ec3c0e0 (&type->s_umount_key#95){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
 #1: ffff88802b300278 (&c->state_lock){++++}-{4:4}, at: __bch2_fs_stop+0xf8/0x900
 #2: ffff88802b34af68 (&j->reclaim_lock){+.+.}-{4:4}, at: journal_flush_done+0x86/0x810
 #3: ffff88802b304398 (&c->btree_trans_barrier){.+.+}-{0:0}, at: __bch2_trans_get+0x7f4/0xd80
 #4: ffff88802b304740 (&wb->flushing.lock){+.+.}-{4:4}, at: btree_write_buffer_flush_seq+0x18bd/0x1a40
 #5: ffff88802b326710 (&c->gc_lock){++++}-{4:4}, at: bch2_btree_update_start+0x542/0x1de0
1 lock held by bch-reclaim/loo/15604:
 #0: ffff88802b34af68 (&j->reclaim_lock){+.+.}-{4:4}, at: bch2_journal_reclaim_thread+0x16b/0x4f0
1 lock held by syz.4.1989/17712:
 #0: ffff88803ec3c0e0 (&type->s_umount_key#95){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.4.1989/17713:
 #0: ffff88803ec3c0e0 (&type->s_umount_key#95){++++}-{4:4}, at: super_lock+0x2a9/0x3b0

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 34 Comm: khungtaskd Not tainted 6.16.0-syzkaller-11895-gcca7a0aae895 #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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 17906 Comm: kworker/u10:19 Not tainted 6.16.0-syzkaller-11895-gcca7a0aae895 #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue:  0x0 (events_unbound)
RIP: 0010:__schedule+0x7a9/0x4cc0
Code: 74 24 10 4c 8b b3 58 0e 00 00 49 39 de 0f 94 c0 0f 1f 44 00 00 48 89 df 48 8d 94 24 90 01 00 00 e8 1c bb 18 f6 48 89 44 24 08 <4c> 8b 74 24 18 4c 89 f7 be 08 00 00 00 e8 25 a3 a9 f6 f0 49 83 26
RSP: 0018:ffffc9000386fa20 EFLAGS: 00000086
RAX: ffff88810e369cc0 RBX: ffff88804b039f80 RCX: dffffc0000000000
RDX: ffff88810e37d700 RSI: ffff88804b039f80 RDI: ffff88810e369cc0
RBP: ffffc9000386fc38 R08: ffffffff8fa34237 R09: 1ffffffff1f46846
R10: dffffc0000000000 R11: fffffbfff1f46847 R12: dffffc0000000000
R13: 0000000000000402 R14: ffff88804b039f80 R15: 1ffff11009607551
FS:  0000000000000000(0000) GS:ffff8880b8624000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555555af5608 CR3: 000000000df36000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 schedule+0x165/0x360
 worker_thread+0xa82/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
