INFO: task syz.1.411:8528 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.411       state:D stack:24888 pid:8528  tgid:8527  ppid:8140   task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x149b/0x4fd0
 schedule+0x165/0x360
 io_schedule+0x80/0xd0
 lock_metapage+0x1f3/0x400
 __get_metapage+0x49a/0xde0
 dtSearch+0x591/0x21b0
 jfs_lookup+0x155/0x380
 lookup_one_qstr_excl+0x131/0x360
 filename_create+0x209/0x360
 do_mkdirat+0xca/0x4b0
 __x64_sys_mkdirat+0x87/0xa0
 do_syscall_64+0xec/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f75ed58df17
RSP: 002b:00007f75ee40ee68 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f75ee40eef0 RCX: 00007f75ed58df17
RDX: 00000000000001ff RSI: 00002000000000c0 RDI: 00000000ffffff9c
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00002000000000c0
R13: 00007f75ee40eeb0 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
INFO: task syz.1.411:8544 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.411       state:D stack:28136 pid:8544  tgid:8527  ppid:8140   task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x149b/0x4fd0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_write_slowpath+0x872/0xfe0
 down_write_nested+0x1b5/0x200
 do_unlinkat+0x1b2/0x560
 __x64_sys_unlinkat+0xd3/0xf0
 do_syscall_64+0xec/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f75ed58f7c9
RSP: 002b:00007f75ee3ee038 EFLAGS: 00000246 ORIG_RAX: 0000000000000107
RAX: ffffffffffffffda RBX: 00007f75ed7e6090 RCX: 00007f75ed58f7c9
RDX: 0000000000000000 RSI: 0000200000000080 RDI: ffffffffffffff9c
RBP: 00007f75ed5f297f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f75ed7e6128 R14: 00007f75ed7e6090 R15: 00007ffcdd95a758
 </TASK>
INFO: task syz.1.411:8545 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.411       state:D stack:26944 pid:8545  tgid:8527  ppid:8140   task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x149b/0x4fd0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_read_slowpath+0x5fd/0x8f0
 down_read+0x99/0x2e0
 lookup_slow+0x46/0x70
 path_lookupat+0x3f5/0x8c0
 filename_lookup+0x212/0x570
 user_path_at+0x3a/0x60
 __se_sys_mount+0x2d4/0x410
 do_syscall_64+0xec/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f75ed58f7c9
RSP: 002b:00007f75ee3cd038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f75ed7e6180 RCX: 00007f75ed58f7c9
RDX: 00002000000000c0 RSI: 0000200000000140 RDI: 0000200000000100
RBP: 00007f75ed5f297f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000001008000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f75ed7e6218 R14: 00007f75ed7e6180 R15: 00007ffcdd95a758
 </TASK>
INFO: task syz.1.411:8548 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.411       state:D stack:28728 pid:8548  tgid:8527  ppid:8140   task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x149b/0x4fd0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_write_slowpath+0x872/0xfe0
 down_write_nested+0x1b5/0x200
 filename_create+0x1fb/0x360
 do_mknodat+0x181/0x610
 __x64_sys_mknod+0x8c/0xa0
 do_syscall_64+0xec/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f75ed58f7c9
RSP: 002b:00007f75ee3ac038 EFLAGS: 00000246 ORIG_RAX: 0000000000000085
RAX: ffffffffffffffda RBX: 00007f75ed7e6270 RCX: 00007f75ed58f7c9
RDX: 0000000000000703 RSI: 0000000000002000 RDI: 0000200000000000
RBP: 00007f75ed5f297f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f75ed7e6308 R14: 00007f75ed7e6270 R15: 00007ffcdd95a758
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/36:
 #0: ffffffff8df41a20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5652:
 #0: ffff88816b3cf0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc9000356e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x449/0x1460
3 locks held by kworker/0:3/5837:
 #0: ffff888100075948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x1770
 #1: ffffc900050f7bc0 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x1770
 #2: ffff888105698240 (&data->fib_lock){+.+.}-{4:4}, at: nsim_fib_event_work+0x1f7/0x3b0
2 locks held by syz.1.411/8528:
 #0: ffff88817420a420 (sb_writers#16){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff8881be6e2a18 (&type->i_mutex_dir_key#12/1){+.+.}-{4:4}, at: filename_create+0x1fb/0x360
2 locks held by syz.1.411/8544:
 #0: ffff88817420a420 (sb_writers#16){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff8881be6e2a18 (&type->i_mutex_dir_key#12/1){+.+.}-{4:4}, at: do_unlinkat+0x1b2/0x560
1 lock held by syz.1.411/8545:
 #0: ffff8881be6e2a18 (&type->i_mutex_dir_key#12){++++}-{4:4}, at: lookup_slow+0x46/0x70
2 locks held by syz.1.411/8548:
 #0: ffff88817420a420 (sb_writers#16){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff8881be6e2a18 (&type->i_mutex_dir_key#12/1){+.+.}-{4:4}, at: filename_create+0x1fb/0x360
1 lock held by syz-executor/10206:
4 locks held by dhcpcd-run-hook/13612:

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 36 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+0xe8/0x150
 nmi_cpu_backtrace+0x274/0x2d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 sys_info+0x135/0x170
 watchdog+0xf95/0xfe0
 kthread+0x711/0x8a0
 ret_from_fork+0x510/0xa50
 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: 10206 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:its_return_thunk+0x0/0x10
Code: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc <c3> cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 e9 eb ae d6 f5 cc
RSP: 0018:ffffc90004147530 EFLAGS: 00000246
RAX: 00007ffdc7032228 RBX: 00007f0d3b58ed77 RCX: 1ffff92000828e01
RDX: ffffffff900cc27e RSI: 0000000000000003 RDI: ffffc90004147fe0
RBP: dffffc0000000000 R08: 0000000000000022 R09: ffffffff8df41a20
R10: ffffc90004147658 R11: ffffffff81acf490 R12: ffffc90004147650
R13: ffffc90004147610 R14: ffffc90004147608 R15: ffffc90004147f48
FS:  000055555b118500(0000) GS:ffff88818e821000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005654a29c6950 CR3: 000000016d1d0000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 unwind_next_frame+0x1082/0x23d0
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_noprof+0x41d/0x800
 tomoyo_realpath_from_path+0xe3/0x5d0
 tomoyo_path_perm+0x213/0x4b0
 tomoyo_path_unlink+0xa2/0xe0
 security_path_unlink+0x167/0x360
 do_unlinkat+0x24d/0x560
 __x64_sys_unlink+0x47/0x50
 do_syscall_64+0xec/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0d3b58ed77
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 57 00 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:00007ffdc7032228 EFLAGS: 00000202 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000006e8c RCX: 00007f0d3b58ed77
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffdc70322e0
RBP: 00007ffdc70322e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffdc7033370
R13: 00007f0d3b5ee72f R14: 000055555b1184a8 R15: 0000000000000005
 </TASK>
