INFO: task syz.8.17550:3832 blocked for more than 143 seconds.
      Tainted: G             L      syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.8.17550     state:D stack:21656 pid:3832  tgid:3831  ppid:2194   task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x14ef/0x4fb0
 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+0xe2/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f22c159acb9
RSP: 002b:00007f22c2456028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007f22c1815fa0 RCX: 00007f22c159acb9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f22c1815fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f22c1816038 R14: 00007f22c1815fa0 R15: 00007ffe808898c8
 </TASK>
INFO: task syz.8.17550:3833 blocked for more than 143 seconds.
      Tainted: G             L      syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.8.17550     state:D stack:28760 pid:3833  tgid:3831  ppid:2194   task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x14ef/0x4fb0
 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+0xe2/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f22c159acb9
RSP: 002b:00007f22c2434028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007f22c1816090 RCX: 00007f22c159acb9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f22c1816090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f22c1816128 R14: 00007f22c1816090 R15: 00007ffe808898c8
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/36:
 #0: ffffffff8e35a360 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5666:
 #0: ffff8881106b70a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc9000356e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13c0
2 locks held by syz-executor/1568:
1 lock held by syz.8.17550/3832:
 #0: ffff88816a5620e0 (&type->s_umount_key#87){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.8.17550/3833:
 #0: ffff88816a5620e0 (&type->s_umount_key#87){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.3.17985/5481:
 #0: ffff88816a5620e0 (&type->s_umount_key#87){++++}-{4:4}, at: super_lock+0x2d6/0x3d0

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 36 Comm: khungtaskd Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
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+0xf90/0xfe0
 kthread+0x726/0x8b0
 ret_from_fork+0x51b/0xa40
 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: 1568 Comm: syz-executor Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:lock_release+0x3c/0x3a0
Code: 49 89 f5 49 89 fe 65 48 8b 05 20 5e 30 11 48 89 44 24 28 0f 1f 44 00 00 65 8b 05 23 5e 30 11 83 f8 08 0f 83 56 02 00 00 89 c0 <48> 0f a3 05 4c 96 2f 0e 73 0d e8 a5 f4 08 00 84 c0 0f 84 94 02 00
RSP: 0018:ffffc90003d374c8 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffffffff81fb965c RCX: ffff8881001457c0
RDX: 0000000000000000 RSI: ffffffff81fb965c RDI: ffffffff8e35a360
RBP: 0000000000000001 R08: ffffea000633ca77 R09: 1ffffd4000c6794e
R10: dffffc0000000000 R11: fffff94000c6794f R12: dffffc0000000000
R13: ffffffff81fb965c R14: ffffffff8e35a360 R15: 0000000000000002
FS:  0000555588973500(0000) GS:ffff88818e324000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32802ff8 CR3: 00000001103de000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 folio_try_get+0x1d1/0x340
 filemap_get_entry+0x1d5/0x320
 __filemap_get_folio_mpol+0x6d/0xb00
 f2fs_grab_cache_folio+0x2e/0x380
 __get_node_folio+0x1a0/0x1540
 f2fs_update_inode_page+0x82/0x190
 f2fs_write_checkpoint+0xbd5/0x2490
 kill_f2fs_super+0x308/0x710
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x437/0x4d0
 task_work_run+0x1d9/0x270
 exit_to_user_mode_loop+0xed/0x480
 do_syscall_64+0x2b7/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f098f59bf17
Code: a2 c7 05 7c 96 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:00007ffedfb501f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f098f60471f RCX: 00007f098f59bf17
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffedfb502b0
RBP: 00007ffedfb502b0 R08: 00007ffedfb512b0 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffedfb51340
R13: 00007f098f60471f R14: 000000000022ac11 R15: 00007ffedfb51380
 </TASK>
