INFO: task syz.2.68:6539 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.68        state:D stack:14864 pid:6539  tgid:6538  ppid:5872   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: 0033:0x7f7e9998ebe9
RSP: 002b:00007f7e9a8eb038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f7e99bc5fa0 RCX: 00007f7e9998ebe9
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000004
RBP: 00007f7e99a11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020fffe82 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7e99bc6038 R14: 00007f7e99bc5fa0 R15: 00007ffc56a7b5a8
 </TASK>
INFO: task syz.2.68:6597 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.68        state:D stack:27792 pid:6597  tgid:6538  ppid:5872   task_flags:0x400040 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_openat+0x138/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7e9998ebe9
RSP: 002b:00007f7e9a8a9038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f7e99bc6180 RCX: 00007f7e9998ebe9
RDX: 00000000000c4042 RSI: 0000200000000300 RDI: ffffffffffffff9c
RBP: 00007f7e99a11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000000001ff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7e99bc6218 R14: 00007f7e99bc6180 R15: 00007ffc56a7b5a8
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e139f20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by kworker/1:2/95:
 #0: ffff88801a482548 ((wq_completion)events_freezable_pwr_efficient){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc90001c0fbc0 ((work_completion)(&(&ev->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
2 locks held by getty/5672:
 #0: ffff888110ad40a0 (&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
3 locks held by kworker/1:2H/6018:
2 locks held by syz.2.68/6539:
 #0: ffff8881131ac428 (sb_writers#15){.+.+}-{0:0}, at: direct_splice_actor+0x49/0x160
 #1: ffff8881142d9078 (&sb->s_type->i_mutex_key#24){++++}-{4:4}, at: bch2_direct_write+0x192/0x2ce0
4 locks held by syz.2.68/6596:
1 lock held by syz.2.68/6597:
 #0: ffff8881142d9078 (&sb->s_type->i_mutex_key#24){++++}-{4:4}, at: process_measurement+0x3d8/0x1a40
1 lock held by syz-executor/6774:
 #0: ffffffff8e13f9b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2f6/0x730
3 locks held by syz.6.294/8809:
2 locks held by syz.1.295/8821:
 #0: ffff8881098b1358 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_release+0x1a9/0x650
 #1: ffff888109909910 (&cd->lock){+.+.}-{4:4}, at: sr_block_release+0x4c/0x90

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

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: 6774 Comm: syz-executor 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:check_preemption_disabled+0x63/0x120
Code: 08 0f 85 cc 00 00 00 48 83 c4 10 5b 41 5e 41 5f 5d e9 81 c9 02 00 cc 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 <74> c8 65 4c 8b 3c 25 08 80 a0 92 41 f6 47 2f 04 74 0a 41 83 bf 18
RSP: 0018:ffffc9000449f458 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 0000000000000202 RCX: 0000000080000000
RDX: 0000000000000003 RSI: ffffffff8dba7696 RDI: ffffffff8be33880
RBP: ffff888021e2e1a8 R08: ffffc9000449f618 R09: 0000000000000000
R10: ffffc9000449f678 R11: fffff52000893ed1 R12: 0000000000000003
R13: 0000000000000003 R14: ffffffff8e139f20 R15: ffff888021e2d640
FS:  000055557b97a500(0000) GS:ffff8881a3c18000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff7c5dfdd8 CR3: 0000000039c34000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 lock_release+0x27a/0x3e0
 unwind_next_frame+0x19a9/0x2390
 __unwind_start+0x5b9/0x760
 arch_stack_walk+0xe4/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5b/0x80
 kfree+0x18e/0x440
 tomoyo_realpath_from_path+0x598/0x5d0
 tomoyo_path_perm+0x213/0x4b0
 tomoyo_path_rmdir+0xa2/0xe0
 security_path_rmdir+0x167/0x360
 do_rmdir+0x1e8/0x550
 __x64_sys_unlinkat+0xc2/0xf0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9ef458e1c7
Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 07 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff7c5e0588 EFLAGS: 00000206 ORIG_RAX: 0000000000000107
RAX: ffffffffffffffda RBX: 0000000000000024 RCX: 00007f9ef458e1c7
RDX: 0000000000000200 RSI: 00007fff7c5e1730 RDI: 00000000ffffff9c
RBP: 00007f9ef4611c05 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 00007fff7c5e1730
R13: 00007f9ef4611c05 R14: 000055557b97a4a8 R15: 00007fff7c5e49e0
 </TASK>
