BUG: Dentry ffff888022ace468{i=0,n=.reiserfs_priv}  still in use (1) [unmount of squashfs loop0]
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WARNING: CPU: 0 PID: 5046 at fs/dcache.c:1676 umount_check+0x18c/0x1d0 fs/dcache.c:1667
Modules linked in:
CPU: 0 PID: 5046 Comm: syz-executor.0 Not tainted 6.4.0-syzkaller-11478-gd528014517f2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
RIP: 0010:umount_check+0x18c/0x1d0 fs/dcache.c:1676
Code: 6d e9 ff 4c 8b 0b 48 81 c5 58 06 00 00 48 c7 c7 c0 3c 17 8b 4c 89 fe 4c 89 f2 4c 89 f9 45 89 e8 55 e8 28 9c bd 08 48 83 c4 08 <0f> 0b e9 f5 fe ff ff 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c cc fe ff
RSP: 0018:ffffc90003e5fbe0 EFLAGS: 00010292
RAX: 0000000000000060 RBX: ffffffff8d5077e0 RCX: e351675b7966ce00
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffff88802d75a658 R08: ffffffff816f581c R09: 1ffff920007cbf30
R10: dffffc0000000000 R11: fffff520007cbf31 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000000 R15: ffff888022ace468
FS:  0000555555d1d400(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd49777e88 CR3: 000000003396d000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 d_walk+0x1f9/0x6c0 fs/dcache.c:1386
 do_one_tree+0x35/0xe0 fs/dcache.c:1683
 shrink_dcache_for_umount+0x7d/0x120 fs/dcache.c:1699
 generic_shutdown_super+0x67/0x340 fs/super.c:471
 kill_block_super+0x68/0xa0 fs/super.c:1417
 deactivate_locked_super+0xa4/0x110 fs/super.c:330
 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1254
 task_work_run+0x24a/0x300 kernel/task_work.c:179
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
 syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:297
 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f4e2788d7f7
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:00007ffd497785c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f4e2788d7f7
RDX: 00007ffd4977869b RSI: 000000000000000a RDI: 00007ffd49778690
RBP: 00007ffd49778690 R08: 00000000ffffffff R09: 00007ffd49778460
R10: 0000555555d1e893 R11: 0000000000000246 R12: 00007f4e278d643b
R13: 00007ffd49779750 R14: 0000555555d1e810 R15: 00007ffd49779790
 </TASK>