Merge git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/sysctl-2.6
[linux-2.6.git] / security / tomoyo / realpath.c
index 917f564..18369d4 100644 (file)
@@ -110,6 +110,15 @@ int tomoyo_realpath_from_path2(struct path *path, char *newname,
                spin_unlock(&dcache_lock);
                path_put(&root);
                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)) {
+                       sp -= 5;
+                       if (sp >= newname)
+                               memcpy(sp, "/proc", 5);
+                       else
+                               sp = ERR_PTR(-ENOMEM);
+               }
        }
        if (IS_ERR(sp))
                error = PTR_ERR(sp);