Re: [PATCH] ovl: restrict casefold consistency checks to directories

[André Almeida]

Em 28/10/2026 12:40, Hungyu Lin escreveu:
> ovl_lookup_single() compares every positive child's casefold flag with
> that of the overlay. On casefolded ext4, regular files do not inherit
> the casefold flag from their parent directory. Looking up an existing
> regular file on a casefolded overlay therefore fails with EREMOTE.
> Symlinks, FIFOs and whiteouts are rejected by the same check.
>
> Restrict the child consistency check to directories, along with the
> corresponding assertion in ovl_get_inode(). This allows nondirectory
> objects to be looked up without rejecting them or warning about their
> flags, while directories with inconsistent casefold settings are still
> rejected.
>
> Fixes: 16754d61dc69 ("ovl: Support mounting case-insensitive enabled layers")
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Hungyu Lin <dennylin0707@xxxxxxxxx>

Reviewed-by: André Almeida <andrealmeid@xxxxxxxxxx>