INFO: task syz.1.196:8327 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.196       state:D stack:17296 pid:8327  tgid:8251  ppid:7566   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: 0033:0x7f6b9158ebe9
RSP: 002b:00007f6b8f7f6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f6b917c6090 RCX: 00007f6b9158ebe9
RDX: 0000000000143142 RSI: 0000200000000400 RDI: ffffffffffffff9c
RBP: 00007f6b91611e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000040 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6b917c6128 R14: 00007f6b917c6090 R15: 00007ffce973a348
 </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/u10:5/1091:
 #0: ffff888136639f98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140
 #1: ffff888136624008 (psi_seq){-.-.}-{0:0}, at: psi_task_switch+0x53/0x880
2 locks held by getty/5673:
 #0: ffff8881093a10a0 (&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.1.196/8252:
 #0: ffff88802f248428 (sb_writers#19){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff888114b33e08 (&sb->s_type->i_mutex_key#25){++++}-{4:4}, at: do_truncate+0x171/0x220
1 lock held by syz.1.196/8327:
 #0: ffff888114b33e08 (&sb->s_type->i_mutex_key#25){++++}-{4:4}, at: process_measurement+0x3d8/0x1a40
2 locks held by syz.2.533/11797:
 #0: ffff88802f2480e0 (&type->s_umount_key#57){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
 #1: ffff88802f248950 (&s->s_sync_lock){+.+.}-{4:4}, at: sync_inodes_sb+0x255/0xa10
1 lock held by syz.5.610/12372:
2 locks held by syz.5.610/12389:
2 locks held by syz.3.615/12403:
 #0: ffff8880278b4428 (sb_writers#17){.+.+}-{0:0}, at: direct_splice_actor+0x49/0x160
 #1: ffff888114b10578 (&sb->s_type->i_mutex_key#27){+.+.}-{4:4}, at: generic_file_write_iter+0xeb/0x550
6 locks held by syz.3.615/12404:

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

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: 12402 Comm: syz.3.615 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:rcu_is_watching+0x55/0xb0
Code: 1d be 8d 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 3c c0 7c 00 48 c7 c3 98 df a1 92 49 03 1e 48 89 d8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 75 34 8b 03 65 ff 0d d9 4f fa 10 74 11 83 e0
RSP: 0018:ffffc900036ffb20 EFLAGS: 00000806
RAX: 1ffff11026cc65f3 RBX: ffff888136632f98 RCX: fb1d8fb27d0b9500
RDX: 0000000000000000 RSI: ffffffff8be338e0 RDI: ffffffff8be338a0
RBP: ffffffff84d07235 R08: 0000000000000001 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1f47427 R12: 0000000000000000
R13: ffffffff99d32a80 R14: ffffffff8dbe1d18 R15: dffffc0000000000
FS:  00005555876ab500(0000) GS:ffff8881a3c15000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000ee000 CR3: 000000002e2f2000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 lock_acquire+0x5f/0x360
 _raw_spin_lock_irqsave+0xa7/0xf0
 __debug_object_init+0x85/0x3c0
 hrtimer_nanosleep+0xab/0x360
 __se_sys_clock_nanosleep+0x2f1/0x380
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f80bc3c14a5
Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 f6 54 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 4f 55 ff ff 48 8b 04 24 48 83 c4 28 f7 d8
RSP: 002b:00007ffc33fb8b60 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 00007f80bc5c5fa0 RCX: 00007f80bc3c14a5
RDX: 00007ffc33fb8ba0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f80bc5c7da0 R08: 0000000000000000 R09: 7fffffffffffffff
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000048589
R13: 00007ffc33fb8cc0 R14: ffffffffffffffff R15: 00007ffc33fb8ce0
 </TASK>
