BUG: Dentry 0000000071084194{i=0,n=.reiserfs_priv}  still in use (1) [unmount of squashfs loop4]
------------[ cut here ]------------
WARNING: CPU: 1 PID: 3118 at fs/dcache.c:1676 umount_check+0xc0/0xc8 fs/dcache.c:1667
Modules linked in:
CPU: 1 PID: 3118 Comm: syz-executor.4 Not tainted 6.1.0-rc6-syzkaller-32662-g6d464646530f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : umount_check+0xc0/0xc8 fs/dcache.c:1667
lr : umount_check+0xc0/0xc8 fs/dcache.c:1667
sp : ffff800010fabbc0
x29: ffff800010fabbc0 x28: ffff00010e552ad8 x27: ffff80000d4e52b0
x26: ffff00010e5529c0 x25: 0000000000000001 x24: ffff00010e552ad8
x23: ffff00010e552300 x22: ffff00010e54a138 x21: ffff8000085f6d24
x20: 0000000000000000 x19: ffff00010e552270 x18: 00000000000000c0
x17: 657375206e69206c x16: ffff80000dbe6158 x15: ffff0000c64c0000
x14: 0000000000000000 x13: 00000000ffffffff x12: ffff0000c64c0000
x11: ff808000081c4d40 x10: 0000000000000000 x9 : 86530f3febf84e00
x8 : 86530f3febf84e00 x7 : ffff80000c08b4f4 x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000
x2 : ffff0001fefddcc8 x1 : 0000000000000002 x0 : 0000000000000060
Call trace:
 umount_check+0xc0/0xc8 fs/dcache.c:1667
 d_walk+0x13c/0x55c fs/dcache.c:1386
 do_one_tree fs/dcache.c:1683 [inline]
 shrink_dcache_for_umount+0x60/0x140 fs/dcache.c:1699
 generic_shutdown_super+0x30/0x198 fs/super.c:473
 kill_block_super+0x30/0x78 fs/super.c:1428
 deactivate_locked_super+0x70/0xe8 fs/super.c:332
 deactivate_super+0xd0/0xd4 fs/super.c:363
 cleanup_mnt+0x184/0x1c0 fs/namespace.c:1186
 __cleanup_mnt+0x20/0x30 fs/namespace.c:1193
 task_work_run+0x100/0x148 kernel/task_work.c:179
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 do_notify_resume+0x174/0x1f0 arch/arm64/kernel/signal.c:1127
 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline]
 el0_svc+0x9c/0x150 arch/arm64/kernel/entry-common.c:638
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584
irq event stamp: 5185950
hardirqs last  enabled at (5185949): [<ffff8000081c3024>] __up_console_sem+0xb0/0xfc kernel/printk/printk.c:261
hardirqs last disabled at (5185950): [<ffff80000c07d8b4>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (5185796): [<ffff80000801c38c>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (5185794): [<ffff80000801c358>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---
BUG: Dentry 0000000071084194{i=0,n=.reiserfs_priv}  still in use (1) [unmount of squashfs loop4]
------------[ cut here ]------------
WARNING: CPU: 0 PID: 3118 at fs/dcache.c:1676 umount_check+0xc0/0xc8 fs/dcache.c:1667
Modules linked in:
CPU: 0 PID: 3118 Comm: syz-executor.4 Tainted: G        W          6.1.0-rc6-syzkaller-32662-g6d464646530f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : umount_check+0xc0/0xc8 fs/dcache.c:1667
lr : umount_check+0xc0/0xc8 fs/dcache.c:1667
sp : ffff800010fabbc0
x29: ffff800010fabbc0 x28: ffff00010e552ad8 x27: ffff80000d4e52b0
x26: ffff00010e5529c0 x25: 0000000000000001 x24: ffff00010e552ad8
x23: ffff00010e552300 x22: ffff00010e54a138 x21: ffff8000085f6d24
x20: 0000000000000000 x19: ffff00010e552270 x18: 00000000000000c0
x17: 657375206e69206c x16: ffff80000dbe6158 x15: ffff0000c64c0000
x14: 0000000000000000 x13: 00000000ffffffff x12: ffff0000c64c0000
x11: ff808000081c4d40 x10: 0000000000000000 x9 : 86530f3febf84e00
x8 : 86530f3febf84e00 x7 : ffff80000c08b4f4 x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000
x2 : ffff0001fefbecc8 x1 : 0000000000000003 x0 : 0000000000000060
Call trace:
 umount_check+0xc0/0xc8 fs/dcache.c:1667
 d_walk+0x13c/0x55c fs/dcache.c:1386
 do_one_tree fs/dcache.c:1683 [inline]
 shrink_dcache_for_umount+0x60/0x140 fs/dcache.c:1699
 generic_shutdown_super+0x30/0x198 fs/super.c:473
 kill_block_super+0x30/0x78 fs/super.c:1428
 deactivate_locked_super+0x70/0xe8 fs/super.c:332
 deactivate_super+0xd0/0xd4 fs/super.c:363
 cleanup_mnt+0x184/0x1c0 fs/namespace.c:1186
 __cleanup_mnt+0x20/0x30 fs/namespace.c:1193
 task_work_run+0x100/0x148 kernel/task_work.c:179
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 do_notify_resume+0x174/0x1f0 arch/arm64/kernel/signal.c:1127
 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline]
 el0_svc+0x9c/0x150 arch/arm64/kernel/entry-common.c:638
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584
irq event stamp: 5186276
hardirqs last  enabled at (5186275): [<ffff8000081c3024>] __up_console_sem+0xb0/0xfc kernel/printk/printk.c:261
hardirqs last disabled at (5186276): [<ffff80000c07d8b4>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (5186256): [<ffff8000080102e4>] _stext+0x2e4/0x37c
softirqs last disabled at (5185953): [<ffff800008017c88>] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80
---[ end trace 0000000000000000 ]---
VFS: Busy inodes after unmount of loop4. Self-destruct in 5 seconds.  Have a nice day...