INFO: task syz.6.448:8721 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.448       state:D stack:28800 pid:8721  tgid:8720  ppid:7913   task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x15dd/0x52d0
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_read_slowpath+0x61e/0x920
 down_read+0x99/0x2e0
 super_lock+0x2d6/0x3d0
 __iterate_supers+0x126/0x290
 __ia32_sys_sync+0xa0/0x120
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7d1ef9c799
RSP: 002b:00007f7d1fe9d028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007f7d1f215fa0 RCX: 00007f7d1ef9c799
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f7d1f215fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7d1f216038 R14: 00007f7d1f215fa0 R15: 00007ffd38e14538
 </TASK>
INFO: task syz.6.448:8723 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.448       state:D stack:28832 pid:8723  tgid:8720  ppid:7913   task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x15dd/0x52d0
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_read_slowpath+0x61e/0x920
 down_read+0x99/0x2e0
 super_lock+0x2d6/0x3d0
 __iterate_supers+0x126/0x290
 __ia32_sys_sync+0xa0/0x120
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7d1ef9c799
RSP: 002b:00007f7d1fe7c028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007f7d1f216090 RCX: 00007f7d1ef9c799
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f7d1f216090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7d1f216128 R14: 00007f7d1f216090 R15: 00007ffd38e14538
 </TASK>
INFO: task syz.6.448:8726 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.448       state:D stack:28832 pid:8726  tgid:8720  ppid:7913   task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x15dd/0x52d0
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_read_slowpath+0x61e/0x920
 down_read+0x99/0x2e0
 super_lock+0x2d6/0x3d0
 __iterate_supers+0x126/0x290
 __ia32_sys_sync+0xa0/0x120
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7d1ef9c799
RSP: 002b:00007f7d1fe5b028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007f7d1f216180 RCX: 00007f7d1ef9c799
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f7d1f216180 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7d1f216218 R14: 00007f7d1f216180 R15: 00007ffd38e14538
 </TASK>

Showing all locks held in the system:
5 locks held by kworker/u8:1/13:
 #0: ffff8881012ae148 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x9ea/0x1830
 #1: ffffc90000127c40 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0xa25/0x1830
 #2: ffffffff8fbbe530 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xf4/0x800
 #3: ffff8881ba629528 (&wg->device_update_lock){+.+.}-{4:4}, at: wg_destruct+0x116/0x310
 #4: ffffffff8e764678 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2d0/0x770
1 lock held by khungtaskd/34:
 #0: ffffffff8e75e3e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
1 lock held by dhcpcd/5553:
 #0: ffffffff8fbcccc8 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x404/0x1ad0
2 locks held by getty/5635:
 #0: ffff8881147400a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900032902f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13c0
4 locks held by syz-executor/6127:
1 lock held by syz.6.448/8721:
 #0: ffff88811c58e0e0 (&type->s_umount_key#72){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.6.448/8723:
 #0: ffff88811c58e0e0 (&type->s_umount_key#72){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.6.448/8726:
 #0: ffff88811c58e0e0 (&type->s_umount_key#72){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.4.546/9343:
 #0: ffff88811c58e0e0 (&type->s_umount_key#72){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.3.641/10125:
 #0: ffff88811c58e0e0 (&type->s_umount_key#72){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.1.779/11253:
 #0: ffff88811c58e0e0 (&type->s_umount_key#72){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.6.802/11455:
 #0: ffff88811c58e0e0 (&type->s_umount_key#72){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.6.802/11458:
 #0: ffff88811c58e0e0 (&type->s_umount_key#72){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.6.802/11459:
 #0: ffff88811c58e0e0 (&type->s_umount_key#72){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.6.802/11461:
 #0: ffff88811c58e0e0 (&type->s_umount_key#72){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.6.802/11464:
 #0: ffff88811c58e0e0 (&type->s_umount_key#72){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.6.802/11474:
 #0: ffff88811c58e0e0 (&type->s_umount_key#72){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.6.802/11480:
 #0: ffff88811c58e0e0 (&type->s_umount_key#72){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.6.802/11481:
 #0: ffff88811c58e0e0 (&type->s_umount_key#72){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
8 locks held by syz-executor/12669:
 #0: ffff8881175f0420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x227/0xb90
 #1: ffff888114733088 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1de/0x540
 #2: ffff88810bc84788 (kn->active#48){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x231/0x540
 #3: ffffffff8f441528 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd7/0x370
 #4: ffff8881157480e8 (&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0xb6/0x860
 #5: ffff88810a169250 (&devlink->lock_key#14){+.+.}-{4:4}, at: nsim_drv_remove+0x50/0x170
 #6: ffffffff8fbcccc8 (rtnl_mutex){+.+.}-{4:4}, at: nsim_destroy+0xed/0x680
 #7: ffffffff8e764678 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x38d/0x770
2 locks held by syz.3.954/12716:
3 locks held by syz.3.954/12729:
 #0: ffff88811662a420 (sb_writers#5){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff88816a15a7d8 (&type->i_mutex_dir_key#5/1){+.+.}-{4:4}, at: filename_unlinkat+0x2a7/0x610
 #2: ffff8881b9b30288 (&sb->s_type->i_mutex_key#15){+.+.}-{4:4}, at: vfs_unlink+0xed/0x6c0

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

NMI backtrace for cpu 1
CPU: 1 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+0xe8/0x150
 nmi_cpu_backtrace+0x274/0x2d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 sys_info+0x135/0x170
 watchdog+0xfd9/0x1030
 kthread+0x388/0x470
 ret_from_fork+0x51e/0xb90
 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: 6127 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:xas_start+0x308/0x770
Code: c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 08 4c 89 f7 e8 17 f1 83 f6 4d 8b 36 40 84 ed 74 71 4c 8d 63 fe 4c 89 e0 <48> c1 e8 03 48 bd 00 00 00 00 00 fc ff df 0f b6 04 28 84 c0 0f 85
RSP: 0018:ffffc90004f6f478 EFLAGS: 00000202
RAX: ffff88812091f9c0 RBX: ffff88812091f9c2 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000002
RBP: 0000000000000001 R08: ffffffff8200b97a R09: ffffffff8e75e3e0
R10: ffffc90004f6f580 R11: fffff520009edeb3 R12: ffff88812091f9c0
R13: ffffc90004f6f578 R14: 000000000000000e R15: 1ffff920009edeaf
FS:  000055555eabe500(0000) GS:ffff88818de5f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2a15c9dd58 CR3: 000000016fc6a000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 xas_load+0x2c/0x5b0
 filemap_get_entry+0x185/0x320
 __filemap_get_folio_mpol+0x6d/0xb00
 __get_node_folio+0x20f/0xe90
 f2fs_update_inode_page+0x83/0x2e0
 f2fs_write_checkpoint+0xbee/0x26a0
 kill_f2fs_super+0x314/0x720
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x437/0x4d0
 task_work_run+0x1d9/0x270
 exit_to_user_mode_loop+0xed/0x480
 do_syscall_64+0x32d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1a8339d9d7
Code: a2 c7 05 1c fd 24 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 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 e8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffcf24fd808 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f1a83432050 RCX: 00007f1a8339d9d7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffcf24fd8c0
RBP: 00007ffcf24fd8c0 R08: 00007ffcf24fe8c0 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcf24fe950
R13: 00007f1a83432050 R14: 0000000000014af3 R15: 00007ffcf24fe990
 </TASK>
