INFO: task syz.0.352:8891 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.352       state:D stack:24664 pid:8891  tgid:8890  ppid:8769   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
 super_lock+0x2a9/0x3b0
 __iterate_supers+0x126/0x290
 __se_sys_quotactl+0x353/0x950
 do_syscall_64+0xec/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f839c98f7c9
RSP: 002b:00007f839d742038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f839cbe5fa0 RCX: 00007f839c98f7c9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000101
RBP: 00007f839c9f297f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f839cbe6038 R14: 00007f839cbe5fa0 R15: 00007fff0e51ea28
 </TASK>

Showing all locks held in the system:
1 lock held by rcu_exp_gp_kthr/18:
1 lock held by khungtaskd/35:
 #0: ffffffff8df41a20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
3 locks held by kworker/u10:7/4157:
 #0: ffff888100089948 ((wq_completion)events_unbound#2){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x1770
 #1: ffffc90023e3fbc0 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x1770
 #2: ffffffff8f311c48 (rtnl_mutex){+.+.}-{4:4}, at: linkwatch_event+0xe/0x60
1 lock held by dhcpcd/5573:
 #0: ffffffff8f311c48 (rtnl_mutex){+.+.}-{4:4}, at: devinet_ioctl+0x323/0x1b20
2 locks held by getty/5657:
 #0: ffff888112e8a0a0 (&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
5 locks held by kworker/u8:3/5869:
 #0: ffff888100ef7948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x1770
 #1: ffffc900052e7bc0 (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+0x2b1/0x6e0
4 locks held by syz-executor/8432:
1 lock held by syz.0.352/8891:
 #0: ffff88817293c0e0 (&type->s_umount_key#62){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.4.544/12991:
 #0: ffff88817293c0e0 (&type->s_umount_key#62){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
7 locks held by syz-executor/16983:
 #0: ffff888115e80420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x211/0xb30
 #1: ffff888105376488 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1de/0x540
 #2: ffff88816ae51d28 (kn->active#48){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x231/0x540
 #3: ffffffff8eb9f9a8 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd1/0x360
 #4: ffff888104ebb0e8 (&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0xb6/0x800
 #5: ffff888104eb8250 (&devlink->lock_key#20){+.+.}-{4:4}, at: nsim_drv_remove+0x50/0x160
 #6: ffffffff8f311c48 (rtnl_mutex){+.+.}-{4:4}, at: netdev_run_todo+0x799/0xea0
2 locks held by syz.0.808/17372:
1 lock held by syz.0.808/17374:

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

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: 8432 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+0x6bc/0x770
Code: df 0f b6 04 08 84 c0 0f 85 b1 00 00 00 41 c6 06 01 48 c7 c7 f1 a4 80 8d 48 c7 c2 60 a9 97 8c e8 7a 04 47 f6 48 89 d8 5b 41 5c <41> 5d 41 5e 41 5f 5d e9 58 3c 05 00 cc 44 89 e1 80 e1 07 38 c1 0f
RSP: 0018:ffffc90007c7f348 EFLAGS: 00000246
RAX: ffff88810d2f0582 RBX: ffffc90007c7f420 RCX: ffff888116941d40
RDX: 0000000000000000 RSI: 000000000000000a RDI: 000000000000003f
RBP: dffffc0000000000 R08: ffffffff81f974dd R09: ffffffff8df41a20
R10: ffffc90007c7f440 R11: fffff52000f8fe8b R12: 1ffff92000f8fe80
R13: ffffc90007c7f438 R14: 000000000000000a R15: 1ffff92000f8fe87
FS:  00005555687a6500(0000) GS:ffff88818e821000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3ac27ee000 CR3: 00000001babd2000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 xas_load+0x2c/0x5b0
 filemap_get_entry+0x168/0x2f0
 __filemap_get_folio_mpol+0x6d/0xb00
 f2fs_grab_cache_folio+0x2e/0x380
 __get_node_folio+0x18e/0x14f0
 f2fs_update_inode_page+0x82/0x190
 f2fs_write_checkpoint+0xb44/0x2430
 kill_f2fs_super+0x2d2/0x6c0
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x425/0x4c0
 task_work_run+0x1d4/0x260
 do_exit+0x694/0x22f0
 do_group_exit+0x21c/0x2d0
 __x64_sys_exit_group+0x3f/0x40
 x64_sys_call+0x2210/0x2210
 do_syscall_64+0xec/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2fafd8f7c9
Code: Unable to access opcode bytes at 0x7f2fafd8f79f.
RSP: 002b:00007fff914e0ea8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f2fafdee7d0 RCX: 00007f2fafd8f7c9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000010 R08: 00007fff914dec46 R09: 00007fff914e2160
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff914e2160
R13: 00007f2fafdee72f R14: 00005555687a64a8 R15: 00007fff914e3230
 </TASK>
