Miklos Szeredi 27c1936af5 ovl: allow upperdir inside lowerdir ... commit 708fa01597fa002599756bf56a96d0de1677375c upstream. Commit 146d62e5a5 ("ovl: detect overlapping layers") made sure we don't have overlapping layers, but it also broke the arguably valid use case of mount -olowerdir=/,upperdir=/subdir,.. where upperdir overlaps lowerdir on the same filesystem. This has been causing regressions. Revert the check, but only for the specific case where upperdir and/or workdir are subdirectories of lowerdir. Any other overlap (e.g. lowerdir is subdirectory of upperdir, etc) case is crazy, so leave the check in place for those. Overlaps are detected at lookup time too, so reverting the mount time check should be safe. Fixes: 146d62e5a5 ("ovl: detect overlapping layers") Cc: <stable@vger.kernel.org> # v5.2 Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2021-05-07 11:04:33 +02:00
..
copy_up.c	ovl: skip getxattr of security labels	2021-02-17 11:02:22 +01:00
dir.c	ovl: fix dentry leak in ovl_get_redirect	2021-02-10 09:29:15 +01:00
export.c	ovl: pass ovl_fs down to functions accessing private xattrs	2020-09-02 10:58:49 +02:00
file.c	ovl: implement volatile-specific fsync error behaviour	2021-02-10 09:29:16 +01:00
inode.c	ovl: perform vfs_getxattr() with mounter creds	2021-02-17 11:02:22 +01:00
Kconfig	docs: fix broken references to text files	2020-04-20 15:35:59 -06:00
Makefile	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
namei.c	ovl: fix leaked dentry	2021-05-07 11:04:32 +02:00
overlayfs.h	ovl: implement volatile-specific fsync error behaviour	2021-02-10 09:29:16 +01:00
ovl_entry.h	ovl: implement volatile-specific fsync error behaviour	2021-02-10 09:29:16 +01:00
readdir.c	ovl: implement volatile-specific fsync error behaviour	2021-02-10 09:29:16 +01:00
super.c	ovl: allow upperdir inside lowerdir	2021-05-07 11:04:33 +02:00
util.c	ovl: implement volatile-specific fsync error behaviour	2021-02-10 09:29:16 +01:00