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
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Kconfig	…
Makefile	…
copy_up.c	overlayfs: set ctime when setting mtime and atime	2023-10-25 12:16:17 +02:00
dir.c	…
export.c	…
file.c	…
inode.c	…
namei.c	…
overlayfs.h	…
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	…
readdir.c	…
super.c	ima: detect changes to the backing overlay file	2023-11-28 17:15:06 +00:00
util.c	…