diff options
| author | Kees Cook <keescook@chromium.org> | 2012-08-27 13:32:15 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-08-27 13:42:02 -0700 |
| commit | 82aceae4f0d42f03d9ad7d1e90389e731153898f (patch) | |
| tree | 9e39183cb3d2a971ac794da1b94d4dd7f07faa5d | |
| parent | 9db48aaf18d675ac41f550c9384154e0c00de2ef (diff) | |
debugfs: more tightly restrict default mount mode
Since the debugfs is mostly only used by root, make the default mount
mode 0700. Most system owners do not need a more permissive value,
but they can choose to weaken the restrictions via their fstab.
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | Documentation/filesystems/debugfs.txt | 4 | ||||
| -rw-r--r-- | fs/debugfs/inode.c | 2 |
2 files changed, 3 insertions, 3 deletions
diff --git a/Documentation/filesystems/debugfs.txt b/Documentation/filesystems/debugfs.txt index 7a34f827989c..3a863f692728 100644 --- a/Documentation/filesystems/debugfs.txt +++ b/Documentation/filesystems/debugfs.txt @@ -15,8 +15,8 @@ Debugfs is typically mounted with a command like: mount -t debugfs none /sys/kernel/debug (Or an equivalent /etc/fstab line). -The debugfs root directory is accessible by anyone by default. To -restrict access to the tree the "uid", "gid" and "mode" mount +The debugfs root directory is accessible only to the root user by +default. To change access to the tree the "uid", "gid" and "mode" mount options can be used. Note that the debugfs API is exported GPL-only to modules. diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c index 2c9fafbe8425..6393fd61d5c4 100644 --- a/fs/debugfs/inode.c +++ b/fs/debugfs/inode.c @@ -28,7 +28,7 @@ #include <linux/magic.h> #include <linux/slab.h> -#define DEBUGFS_DEFAULT_MODE 0755 +#define DEBUGFS_DEFAULT_MODE 0700 static struct vfsmount *debugfs_mount; static int debugfs_mount_count; |