INFO: task syz.9.311:8400 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.9.311       state:D stack:24952 pid:8400  tgid:8399  ppid:7574   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: 0033:0x7f14fe78df17
RSP: 002b:00007f14ff5f8e68 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f14ff5f8ef0 RCX: 00007f14fe78df17
RDX: 00000000000001ff RSI: 00002000000000c0 RDI: 00000000ffffff9c
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00002000000000c0
R13: 00007f14ff5f8eb0 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
INFO: task syz.9.311:8401 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.9.311       state:D stack:28136 pid:8401  tgid:8399  ppid:7574   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: 0033:0x7f14fe78f7c9
RSP: 002b:00007f14ff5d8038 EFLAGS: 00000246 ORIG_RAX: 0000000000000107
RAX: ffffffffffffffda RBX: 00007f14fe9e6090 RCX: 00007f14fe78f7c9
RDX: 0000000000000000 RSI: 0000200000000080 RDI: ffffffffffffff9c
RBP: 00007f14fe7f297f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f14fe9e6128 R14: 00007f14fe9e6090 R15: 00007ffecc2c1ef8
 </TASK>
INFO: task syz.9.311:8402 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.9.311       state:D stack:27096 pid:8402  tgid:8399  ppid:7574   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: 0033:0x7f14fe78f7c9
RSP: 002b:00007f14ff5b7038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f14fe9e6180 RCX: 00007f14fe78f7c9
RDX: 00002000000000c0 RSI: 0000200000000140 RDI: 0000200000000100
RBP: 00007f14fe7f297f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000001008000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f14fe9e6218 R14: 00007f14fe9e6180 R15: 00007ffecc2c1ef8
 </TASK>
INFO: task syz.9.311:8403 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.9.311       state:D stack:28600 pid:8403  tgid:8399  ppid:7574   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: 0033:0x7f14fe78f7c9
RSP: 002b:00007f14ff596038 EFLAGS: 00000246 ORIG_RAX: 0000000000000085
RAX: ffffffffffffffda RBX: 00007f14fe9e6270 RCX: 00007f14fe78f7c9
RDX: 0000000000000713 RSI: 0000000000002000 RDI: 0000200000000000
RBP: 00007f14fe7f297f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f14fe9e6308 R14: 00007f14fe9e6270 R15: 00007ffecc2c1ef8
 </TASK>

Showing all locks held in the system:
1 lock held by rcu_exp_gp_kthr/18:
 #0: ffff88812103a918 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140
1 lock held by khungtaskd/35:
 #0: ffffffff8df41a20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
1 lock held by dhcpcd/5581:
 #0: ffffffff8f311c48 (rtnl_mutex){+.+.}-{4:4}, at: devinet_ioctl+0x323/0x1b20
2 locks held by getty/5663:
 #0: ffff888112cc40a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc9000356b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x449/0x1460
1 lock held by udevd/5847:
 #0: ffff88823c63a918 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140
5 locks held by kworker/u8:3/5873:
 #0: ffff888100ef7948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x1770
 #1: ffffc900050f7bc0 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x1770
 #2: ffffffff8f304bb0 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xf7/0x7a0
 #3: ffffffff8f311c48 (rtnl_mutex){+.+.}-{4:4}, at: default_device_exit_batch+0xdc/0x9e0
 #4: ffffffff8df47578 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x36e/0x6e0
3 locks held by kworker/u8:6/7611:
 #0: ffff88816b08a948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x1770
 #1: ffffc90003b27bc0 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x1770
 #2: ffffffff8f311c48 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_dad_work+0x112/0x14b0
2 locks held by syz.9.311/8400:
 #0: ffff8881b82aa420 (sb_writers#24){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff8881202957e0 (&type->i_mutex_dir_key#19/1){+.+.}-{4:4}, at: filename_create+0x1fb/0x360
2 locks held by syz.9.311/8401:
 #0: ffff8881b82aa420 (sb_writers#24){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff8881202957e0 (&type->i_mutex_dir_key#19/1){+.+.}-{4:4}, at: do_unlinkat+0x1b2/0x560
1 lock held by syz.9.311/8402:
 #0: ffff8881202957e0 (&type->i_mutex_dir_key#19){++++}-{4:4}, at: lookup_slow+0x46/0x70
2 locks held by syz.9.311/8403:
 #0: ffff8881b82aa420 (sb_writers#24){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff8881202957e0 (&type->i_mutex_dir_key#19/1){+.+.}-{4:4}, at: filename_create+0x1fb/0x360
2 locks held by syz-executor/8592:
1 lock held by syz.9.574/11273:
 #0: ffff88816a50a0e0 (&type->s_umount_key#52){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.6.592/11643:
 #0: ffff88816a50a0e0 (&type->s_umount_key#52){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
2 locks held by syz-executor/12579:
 #0: ffffffff8ea95868 (&ops->srcu#2){.+.+}-{0:0}, at: rtnl_link_ops_get+0x23/0x250
 #1: ffffffff8f311c48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x8ec/0x1c90

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 35 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: 8592 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+0x0/0xe0
Code: c7 80 82 c0 8b 48 c7 c6 c0 82 c0 8b eb 1c 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <55> 41 57 41 56 53 65 8b 05 87 44 26 07 65 8b 0d 7c 44 26 07 f7 c1
RSP: 0018:ffffc90003f67830 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 00000000ffffffff RCX: 0000000000000000
RDX: ffff888173120000 RSI: ffffffff8d7a643d RDI: ffffffff8bc082e0
RBP: 00000000ffffffff R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff520007ecefc R12: 0000000000000246
R13: ffff888173120000 R14: ffff8881b328ec98 R15: dffffc0000000000
FS:  000055557684b500(0000) GS:ffff88818e821000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055556a256608 CR3: 00000001b89dc000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 lock_is_held_type+0x5b/0x150
 igrab+0x69/0x1e0
 f2fs_write_checkpoint+0xac9/0x2430
 kill_f2fs_super+0x2d2/0x6c0
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x425/0x4c0
 task_work_run+0x1d4/0x260
 exit_to_user_mode_loop+0xef/0x4e0
 do_syscall_64+0x2b7/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa481b90af7
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffe48aad668 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fa481bee72f RCX: 00007fa481b90af7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe48aad720
RBP: 00007ffe48aad720 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffe48aae7b0
R13: 00007fa481bee72f R14: 000000000002a1e8 R15: 00007ffe48aae7f0
 </TASK>
