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ovl: disable decoding null uuid with redirect_dir 

Currently decoding origin with lower null uuid is not allowed unless user
opted-in to one of the new features that require following the lower inode
of non-dir upper (index, xino, metacopy). Now we add redirect_dir too to
that feature list.

Signed-off-by: Vyacheslav Yurkov <Vyacheslav.Yurkov@bruker.com>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
This commit is contained in:
Vyacheslav Yurkov 2021-05-27 19:45:45 +02:00 committed by Miklos Szeredi
parent 096a218a58
commit e4522bc873
1 changed files with 1 additions and 1 deletions
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fs/overlayfs/super.c
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@ -1600,7 +1600,7 @@ static bool ovl_lower_uuid_ok(struct ovl_fs *ofs, const uuid_t *uuid)
* lower inode of non-dir upper.
*/
if (!ofs->config.index && !ofs->config.metacopy &&
ofs->config.xino != OVL_XINO_ON &&
!ofs->config.redirect_dir && ofs->config.xino != OVL_XINO_ON &&
uuid_is_null(uuid))
return false;