INFO: task syz.6.399:8076 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.399       state:D stack:25128 pid:8076  tgid:8075  ppid:7117   task_flags:0x400040 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_read_slowpath+0x5fd/0x8f0
 down_read+0x98/0x2e0
 super_lock+0x2a9/0x3b0
 __iterate_supers+0x126/0x290
 __se_sys_quotactl+0x353/0x950
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f40a1f8ec29
RSP: 002b:00007f40a2e1b038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f40a21d5fa0 RCX: 00007f40a1f8ec29
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000102
RBP: 00007f40a2011e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f40a21d6038 R14: 00007f40a21d5fa0 R15: 00007fff90669be8
 </TASK>
INFO: task syz.6.399:8084 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.399       state:D stack:28936 pid:8084  tgid:8075  ppid:7117   task_flags:0x400040 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_read_slowpath+0x5fd/0x8f0
 down_read+0x98/0x2e0
 super_lock+0x2a9/0x3b0
 __iterate_supers+0x126/0x290
 __se_sys_quotactl+0x353/0x950
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f40a1f8ec29
RSP: 002b:00007f40a2dfa038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f40a21d6090 RCX: 00007f40a1f8ec29
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000102
RBP: 00007f40a2011e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f40a21d6128 R14: 00007f40a21d6090 R15: 00007fff90669be8
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8dd3aca0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5647:
 #0: ffff88810d0520a0 (&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
2 locks held by syz-executor/5821:
3 locks held by syz.0.27/6021:
3 locks held by syz-executor/6094:
3 locks held by syz-executor/6567:
1 lock held by syz.6.399/8076:
 #0: ffff888033e4a0e0 (&type->s_umount_key#55){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.6.399/8084:
 #0: ffff888033e4a0e0 (&type->s_umount_key#55){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
2 locks held by syz.7.426/8185:
2 locks held by syz-executor/8450:
1 lock held by syz.0.496/8838:
 #0: ffff888033e4a0e0 (&type->s_umount_key#55){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
2 locks held by syz.1.700/9939:
 #0: ffff88802bb49408 (&sb->s_type->i_mutex_key#11){+.+.}-{4:4}, at: sock_close+0x9b/0x240
 #1: ffffffff8dd40738 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2f6/0x730

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

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+0x189/0x250
 nmi_cpu_backtrace+0x39e/0x3d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 watchdog+0xf93/0xfe0
 kthread+0x711/0x8a0
 ret_from_fork+0x439/0x7d0
 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: 6094 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:__lock_acquire+0x587/0xd20
Code: 24 0f b6 81 c4 00 00 00 84 c0 0f 84 68 ff ff ff 41 0f b6 f4 0f b6 d0 40 38 c6 0f 42 d6 80 b9 c6 00 00 00 02 0f 84 51 ff ff ff <89> d0 e9 4a ff ff ff 48 c7 c7 70 bc c0 8d 48 89 de e8 d3 94 1f 03
RSP: 0018:ffffc90003cbf4c0 EFLAGS: 00000093
RAX: 0000000000000003 RBX: 0000000000000002 RCX: ffffffff92f2d888
RDX: 0000000000000003 RSI: 0000000000000004 RDI: ffff888023921cc0
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff81f50dec
R10: 0000000000000406 R11: 0000000000000000 R12: 0000000000000004
R13: 0000000000000001 R14: ffff888023922828 R15: ffff888023922820
FS:  0000555575b78500(0000) GS:ffff8880b8d7e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055557a5585c8 CR3: 000000011d67a000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 lock_acquire+0x120/0x360
 folio_try_get+0x38/0x340
 filemap_get_entry+0x1b8/0x2f0
 __filemap_get_folio+0x68/0xaf0
 f2fs_grab_cache_folio+0x2b/0x380
 __get_node_folio+0x194/0x1410
 f2fs_update_inode_page+0x82/0x190
 f2fs_write_checkpoint+0xb6e/0x1df0
 kill_f2fs_super+0x2c3/0x6c0
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x425/0x4c0
 task_work_run+0x1d4/0x260
 exit_to_user_mode_loop+0xec/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc3f2d8ff57
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:00007ffdc3442758 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000064 RCX: 00007fc3f2d8ff57
RDX: 0000000000000200 RSI: 0000000000000009 RDI: 00007ffdc3443900
RBP: 00007fc3f2e11c2d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000001000 R11: 0000000000000202 R12: 00007ffdc3443900
R13: 00007fc3f2e11c2d R14: 0000555575b784a8 R15: 00007ffdc34449d0
 </TASK>
