Mimi Zohar 0d29174959 ima: detect changes to the backing overlay file ... commit b836c4d29f upstream. Commit 18b44bc5a6 ("ovl: Always reevaluate the file signature for IMA") forced signature re-evaulation on every file access. Instead of always re-evaluating the file's integrity, detect a change to the backing file, by comparing the cached file metadata with the backing file's metadata. Verifying just the i_version has not changed is insufficient. In addition save and compare the i_ino and s_dev as well. Reviewed-by: Amir Goldstein <amir73il@gmail.com> Tested-by: Eric Snowberg <eric.snowberg@oracle.com> Tested-by: Raul E Rangel <rrangel@chromium.org> Cc: stable@vger.kernel.org Signed-off-by: Mimi Zohar <zohar@linux.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-11-28 17:15:06 +00:00
..
copy_up.c	overlayfs: set ctime when setting mtime and atime	2023-10-25 12:16:17 +02:00
dir.c	ovl: store enum redirect_mode in config instead of a string	2023-06-19 14:02:01 +03:00
export.c	ovl: deduplicate lowerpath and lowerstack[]	2023-06-19 14:01:13 +03:00
file.c	ovl: fix incorrect fdput() on aio completion	2023-09-23 11:14:34 +02:00
inode.c	ovl: pass ovl_fs to xino helpers	2023-06-19 14:02:00 +03:00
Kconfig	ovl: Kconfig: Fix spelling mistake "undelying" -> "underlying"	2022-12-08 10:49:46 +01:00
Makefile	ovl: modify layer parameter parsing	2023-06-20 14:10:40 +03:00
namei.c	ovl: store enum redirect_mode in config instead of a string	2023-06-19 14:02:01 +03:00
overlayfs.h	ovl: move all parameter handling into params.{c,h}	2023-07-03 16:08:17 +03:00
ovl_entry.h	ovl: make use of ->layers safe in rcu pathwalk	2023-10-19 23:11:08 +02:00
params.c	ovl: fix regression in showing lowerdir mount option	2023-10-19 23:11:08 +02:00
params.h	ovl: move all parameter handling into params.{c,h}	2023-07-03 16:08:17 +03:00
readdir.c	vfs: get rid of old '->iterate' directory operation	2023-08-06 15:08:35 +02:00
super.c	ima: detect changes to the backing overlay file	2023-11-28 17:15:06 +00:00
util.c	ovl: store enum redirect_mode in config instead of a string	2023-06-19 14:02:01 +03:00