[Bug 218822] New: Delete the file from the upper layer directly, the file will become "Stale"

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=218822

            Bug ID: 218822
           Summary: Delete the file from the upper layer directly, the
                    file will become "Stale"
           Product: File System
           Version: 2.5
          Hardware: All
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P3
         Component: ext4
          Assignee: fs_ext4@kernel-bugs.osdl.org
          Reporter: Squall.Zhou@vecima.com
        Regression: No

The FS mount as following:
/dev/sda7 on / type ext4 (rw,relatime)
/dev/sda5 on /persistent type ext4 (rw,relatime)
overlay on /etc type overlay
(rw,relatime,lowerdir=/sysroot/etc,upperdir=/sysroot/persistent/platform/B/etc/upper,workdir=/sysroot/persistent/platform/B/etc/work)

1. I touched a file named "A" on /etc
2. I remove the file "A" from "/persistent/platform/B/etc/upper"
3. The file "A" in /etc will become "Stale"

root@exs1610ada83b:~ [B]# touch /etc/A
root@exs1610ada83b:~ [B]# rm /persistent/platform/B/etc/upper/A
root@exs1610ada83b:~ [B]# rm /etc/A
rm: can't remove '/etc/A': Stale file handle

Linux version:
root@exs1610ada83b:~ [B]# uname -a
Linux exs1610ada83b 5.10.184-intel-pk-standard #1 SMP PREEMPT Sun Jun 25
06:48:28 UTC 2023 x86_64 GNU/Linux

Thought, the /etc/A will be removed also.

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