INFO: task syz.1.122:6896 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.122       state:D stack:27208 pid:6896  tgid:6875  ppid:5844   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_open+0x11e/0x150
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcd9338ebe9
RSP: 002b:00007fcd9420e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007fcd935b6090 RCX: 00007fcd9338ebe9
RDX: 0000000000000000 RSI: 000000000004787e RDI: 0000200000000000
RBP: 00007fcd93411e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcd935b6128 R14: 00007fcd935b6090 R15: 00007ffeaff64748
 </TASK>
INFO: task syz.1.122:6900 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.122       state:D stack:26952 pid:6900  tgid:6875  ppid:5844   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
 path_openat+0x8da/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: 0033:0x7fcd9338ebe9
RSP: 002b:00007fcd941ed038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fcd935b6180 RCX: 00007fcd9338ebe9
RDX: 000000000000275a RSI: 0000200000000300 RDI: ffffffffffffff9c
RBP: 00007fcd93411e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcd935b6218 R14: 00007fcd935b6180 R15: 00007ffeaff64748
 </TASK>

Showing all locks held in the system:
5 locks held by kworker/u10:0/27:
4 locks held by kworker/u9:1/32:
 #0: ffff88810012e948 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc9000065fbc0 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffff88810f6020e0 (&type->s_umount_key#68){++++}-{4:4}, at: super_trylock_shared+0x20/0xf0
 #3: ffff888103564b88 (&jfs_ip->commit_mutex){+.+.}-{4:4}, at: jfs_commit_inode+0x1ca/0x530
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/5672:
 #0: ffff8880293d50a0 (&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
5 locks held by syz.1.122/6876:
1 lock held by syz.1.122/6896:
 #0: ffff888103564600 (&sb->s_type->i_mutex_key#27){+.+.}-{4:4}, at: process_measurement+0x3d8/0x1a40
2 locks held by syz.1.122/6900:
 #0: ffff88810f602428 (sb_writers#19){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff888103564f38 (&type->i_mutex_dir_key#14){++++}-{4:4}, at: path_openat+0x8da/0x3830
2 locks held by syz.6.386/8650:
 #0: ffff88810f6020e0 (&type->s_umount_key#68){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
 #1: ffff888021ea87d0 (&bdi->wb_switch_rwsem){+.+.}-{4:4}, at: sync_inodes_sb+0x19f/0xa10
4 locks held by syz.1.574/10392:
1 lock held by syz.4.575/10371:
 #0: ffffffff8e13f978 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x3b9/0x730
3 locks held by syz.4.575/10393:

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

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: 6876 Comm: syz.1.122 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:dtSplitRoot+0x763/0x16c0
Code: 00 00 00 0f 84 b4 00 00 00 4c 8b 6c 24 10 49 8d 6d 13 48 89 e8 48 c1 e8 03 42 0f b6 04 20 84 c0 0f 85 4f 0e 00 00 44 88 75 00 <49> 0f be ee 40 0f b6 f5 bf ff 00 00 00 e8 5b be 7f fe 40 84 ed 78
RSP: 0018:ffffc90002f6f688 EFLAGS: 00000246
RAX: ffffffff833ff066 RBX: 0000000000000004 RCX: 0000000000080000
RDX: ffffc90003921000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffff888122f57000 R08: 0000000200000000 R09: 0000000000000000
R10: 00300065006c0069 R11: 006605ff00000020 R12: dffffc0000000000
R13: ffff888122f57000 R14: 0000000000000000 R15: 1ffff110245eae02
FS:  00007fcd9422f6c0(0000) GS:ffff8881a3c1b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6f4fbff000 CR3: 000000001dbfa000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 dtInsert+0xef8/0x5f40
 jfs_link+0x312/0x550
 vfs_link+0x4ed/0x6e0
 do_linkat+0x272/0x560
 __x64_sys_link+0x82/0x90
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcd9338ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007fcd9422f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000056
RAX: ffffffffffffffda RBX: 00007fcd935b5fa0 RCX: 00007fcd9338ebe9
RDX: 0000000000000000 RSI: 0000200000000240 RDI: 0000200000000940
RBP: 00007fcd93411e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcd935b6038 R14: 00007fcd935b5fa0 R15: 00007ffeaff64748
 </TASK>
