Merge: ext4: update orig_path in ext4_find_extent()

MR: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-9/-/merge_requests/6199

JIRA: https://issues.redhat.com/browse/RHEL-64615

CVE: CVE-2024-49881

Signed-off-by: Pavel Reichl <preichl@redhat.com>

Approved-by: Carlos Maiolino <cmaiolino@redhat.com>
Approved-by: Andrey Albershteyn <aalbersh@redhat.com>
Approved-by: CKI KWF Bot <cki-ci-bot+kwf-gitlab-com@redhat.com>

Merged-by: Patrick Talbert <ptalbert@redhat.com>

Author: ptalbert

fs/ext4/extents.c

@@ -957,6 +957,8 @@ ext4_find_extent(struct inode *inode, ext4_lblk_t block,
 
 	ext4_ext_show_path(inode, path);
 
+	if (orig_path)
+		*orig_path = path;
 	return path;
 
 err:
@@ -3273,7 +3275,6 @@ static int ext4_split_extent_at(handle_t *handle,
 	}
 	depth = ext_depth(inode);
 	ex = path[depth].p_ext;
-	*ppath = path;
 
 	if (EXT4_EXT_MAY_ZEROOUT & split_flag) {
 		if (split_flag & (EXT4_EXT_DATA_VALID1|EXT4_EXT_DATA_VALID2)) {

fs/ext4/move_extent.c

@@ -36,7 +36,6 @@ get_ext_path(struct inode *inode, ext4_lblk_t lblock,
 		*ppath = NULL;
 		return -ENODATA;
 	}
-	*ppath = path;
 	return 0;
 }