BUG: Dentry ffff888027c5e5e0{i=0,n=.reiserfs_priv}  still in use (1) [unmount of squashfs loop0]
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WARNING: CPU: 0 PID: 31372 at fs/dcache.c:1676 umount_check+0x188/0x1d0 fs/dcache.c:1667
Modules linked in:
CPU: 0 PID: 31372 Comm: syz-executor.0 Not tainted 6.1.0-syzkaller-13872-gb6bb9676f216 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:umount_check+0x188/0x1d0 fs/dcache.c:1676
Code: ff 4c 8b 0b 48 81 c5 a8 06 00 00 48 c7 c7 40 74 1d 8b 4c 89 fe 4c 89 f2 4c 89 f9 45 89 e8 31 c0 55 e8 4c f4 c7 08 48 83 c4 08 <0f> 0b e9 f4 fe ff ff 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c cb fe ff
RSP: 0018:ffffc900030ffc68 EFLAGS: 00010282
RAX: 0000000000000060 RBX: ffffffff8d6f7220 RCX: ea7560f2c2f7b200
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffff88802a6a86a8 R08: ffffffff81709fad R09: fffff5200061ff45
R10: fffff5200061ff45 R11: 1ffff9200061ff44 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000000 R15: ffff888027c5e5e0
FS:  0000555556c87400(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555556c90848 CR3: 000000002a143000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 d_walk+0x1e3/0x6d0 fs/dcache.c:1386
 do_one_tree fs/dcache.c:1683 [inline]
 shrink_dcache_for_umount+0x8a/0x1a0 fs/dcache.c:1699
 generic_shutdown_super+0x63/0x310 fs/super.c:473
 kill_block_super+0x79/0xd0 fs/super.c:1386
 deactivate_locked_super+0xa7/0xf0 fs/super.c:332
 cleanup_mnt+0x494/0x520 fs/namespace.c:1291
 task_work_run+0x243/0x300 kernel/task_work.c:179
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0x134/0x160 kernel/entry/common.c:171
 exit_to_user_mode_prepare+0xad/0x110 kernel/entry/common.c:203
 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
 syscall_exit_to_user_mode+0x2e/0x60 kernel/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f763668d547
Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 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 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc68896c88 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f763668d547
RDX: 00007ffc68896d5c RSI: 000000000000000a RDI: 00007ffc68896d50
RBP: 00007ffc68896d50 R08: 00000000ffffffff R09: 00007ffc68896b20
R10: 0000555556c888b3 R11: 0000000000000246 R12: 00007f76366e6b24
R13: 00007ffc68897e10 R14: 0000555556c88810 R15: 00007ffc68897e50
 </TASK>