INFO: task syz.3.149:6820 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.149       state:D stack:27800 pid:6820  tgid:6790  ppid:5998   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
 process_measurement+0x3d8/0x1a40
 ima_file_check+0xd7/0x120
 security_file_post_open+0xbb/0x290
 path_openat+0x2f26/0x3830
 do_filp_open+0x1fa/0x410
 do_sys_openat2+0x121/0x1c0
 __x64_sys_open+0x11e/0x150
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9f9838ebe9
RSP: 002b:00007f9f9911c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f9f985b6270 RCX: 00007f9f9838ebe9
RDX: 389b0d52417bb201 RSI: 0000000000064842 RDI: 00002000000005c0
RBP: 00007f9f98411e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9f985b6308 R14: 00007f9f985b6270 R15: 00007ffd95ce6358
 </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
3 locks held by kworker/1:1/47:
 #0: ffff88801a480d48 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc9000075fbc0 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffff88803f478240 (&data->fib_lock){+.+.}-{4:4}, at: nsim_fib_event_work+0x26b/0x3180
2 locks held by getty/5672:
 #0: ffff888028f600a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900029062f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400
2 locks held by syz.3.149/6817:
 #0: ffff88810ce62428 (sb_writers#14){.+.+}-{0:0}, at: vfs_fallocate+0x5f0/0x7e0
 #1: ffff88802c7f9fa8 (&sb->s_type->i_mutex_key#23){++++}-{4:4}, at: bch2_fallocate_dispatch+0x10e/0x410
1 lock held by syz.3.149/6820:
 #0: ffff88802c7f9fa8 (&sb->s_type->i_mutex_key#23){++++}-{4:4}, at: process_measurement+0x3d8/0x1a40
3 locks held by bch-rebalance/l/6804:
1 lock held by syz-executor/8370:
 #0: ffffffff8e13f978 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2f6/0x730
2 locks held by syz.1.556/9890:
2 locks held by dhcpcd/9986:

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

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+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: 6804 Comm: bch-rebalance/l 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
RIP: 0010:bch2_path_put+0x3c0/0x15d0
Code: c1 e8 03 80 3c 28 00 74 08 48 89 df e8 59 22 fc fd b8 ff ff ff ff 41 01 c4 4d 01 e4 4c 03 23 4c 89 e0 48 c1 e8 03 0f b6 04 28 <84> c0 0f 85 c4 0b 00 00 41 0f b7 04 24 89 c1 c1 e1 07 48 8d 04 c1
RSP: 0018:ffffc900031670a0 EFLAGS: 00000a02
RAX: 0000000000000000 RBX: ffff888032a78018 RCX: 0000000000000000
RDX: ffff888022b01cc0 RSI: 0000000000000001 RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffff888032a78247 R09: 1ffff1100654f048
R10: dffffc0000000000 R11: ffffed100654f049 R12: ffff888032a7a450
R13: ffff888032a78000 R14: ffff888032a78250 R15: 0000000000000261
FS:  0000000000000000(0000) GS:ffff8880b861b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff9913aff8 CR3: 000000010669c000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 bch2_trans_iter_exit+0x10a/0x2f0
 bch2_move_get_io_opts_one+0x492/0x670
 do_rebalance_extent+0x323/0x1fe0
 bch2_rebalance_thread+0x126a/0x1f80
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
