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TOMOYO: Compare filesystem by magic number rather than by name.

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Please apply below one after merging 1557d33007
(Merge git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/sysctl-2.6).
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[PATCH for 2.6.33] TOMOYO: Compare filesystem by magic number rather than by name.

We can use magic number for checking whether the filesystem is procfs or not.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
Tetsuo Handa 2009-12-09 15:36:04 +09:00 committed by James Morris
parent 1ad1f10cd9
commit 67fa4880c5
1 changed files with 2 additions and 1 deletions
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3
security/tomoyo/realpath.c
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@ -14,6 +14,7 @@
#include <linux/mnt_namespace.h>
#include <linux/fs_struct.h>
#include <linux/hash.h>
#include <linux/magic.h>
#include "common.h"
#include "realpath.h"
@ -112,7 +113,7 @@ int tomoyo_realpath_from_path2(struct path *path, char *newname,
path_put(&ns_root);
/* Prepend "/proc" prefix if using internal proc vfs mount. */
if (!IS_ERR(sp) && (path->mnt->mnt_parent == path->mnt) &&
(strcmp(path->mnt->mnt_sb->s_type->name, "proc") == 0)) {
(path->mnt->mnt_sb->s_magic == PROC_SUPER_MAGIC)) {
sp -= 5;
if (sp >= newname)
memcpy(sp, "/proc", 5);