[PATCH 1/2] configfs: move CONFIGFS_MAGIC definition to magic.h
From: Frederick Lawler
Date: Tue Aug 18 2026 - 15:43:47 EST
IMA shouldn't measure or appraise configfs, but currently does because
it's missing from the default exclusion policies. Move CONFIGFS_MAGIC to
magic.h to expose the file system's magic to IMA, as well as other userland
applications.
Suggested-by: Mimi Zohar <zohar@xxxxxxxxxxxxx>
Signed-off-by: Frederick Lawler <fred@xxxxxxxxxxxxxx>
---
fs/configfs/mount.c | 4 +---
include/uapi/linux/magic.h | 1 +
2 files changed, 2 insertions(+), 3 deletions(-)
diff --git a/fs/configfs/mount.c b/fs/configfs/mount.c
index 4929f343118946eaa55a539db4192e9c6621a8dc..d8cac1cbf3bd573a0549f2f044714c9d669205a4 100644
--- a/fs/configfs/mount.c
+++ b/fs/configfs/mount.c
@@ -9,6 +9,7 @@
*/
#include <linux/fs.h>
+#include <linux/magic.h>
#include <linux/module.h>
#include <linux/mount.h>
#include <linux/fs_context.h>
@@ -19,9 +20,6 @@
#include <linux/configfs.h>
#include "configfs_internal.h"
-/* Random magic number */
-#define CONFIGFS_MAGIC 0x62656570
-
static struct vfsmount *configfs_mount = NULL;
struct kmem_cache *configfs_dir_cachep;
static int configfs_mnt_count = 0;
diff --git a/include/uapi/linux/magic.h b/include/uapi/linux/magic.h
index 4f2da935a76ccae6e1c3310b2fae5379186548b8..d5b9958ddfaae90b270b66fe7853c5a3d49ce739 100644
--- a/include/uapi/linux/magic.h
+++ b/include/uapi/linux/magic.h
@@ -8,6 +8,7 @@
#define AUTOFS_SUPER_MAGIC 0x0187
#define CEPH_SUPER_MAGIC 0x00c36400
#define CODA_SUPER_MAGIC 0x73757245
+#define CONFIGFS_MAGIC 0x62656570 /* some random number */
#define CRAMFS_MAGIC 0x28cd3d45 /* some random number */
#define CRAMFS_MAGIC_WEND 0x453dcd28 /* magic number with the wrong endianess */
#define DEBUGFS_MAGIC 0x64626720
--
2.43.0