25 Mar
2025
25 Mar
'25
2:36 p.m.
On Tue, Mar 25, 2025 at 11:46:29AM +0100, Miklos Szeredi wrote:
In theory overlayfs could support upper layer directly referring to a data layer, but there's no current use case for this.
Originally, when data-only layers were introduced, this wasn't allowed, only introduced by the "datadir+" feature, but without actually handling this case, resulting in an Oops.
Fix by disallowing datadir without lowerdir.
Reported-by: Giuseppe Scrivano gscrivan@redhat.com Fixes: 24e16e385f22 ("ovl: add support for appending lowerdirs one by one") Cc: stable@vger.kernel.org # v6.7 Reviewed-by: Amir Goldstein amir73il@gmail.com Signed-off-by: Miklos Szeredi mszeredi@redhat.com
Reviewed-by: Christian Brauner brauner@kernel.org