diff options
Diffstat (limited to 'security/tomoyo/realpath.c')
| -rw-r--r-- | security/tomoyo/realpath.c | 23 |
1 files changed, 4 insertions, 19 deletions
diff --git a/security/tomoyo/realpath.c b/security/tomoyo/realpath.c index c00df45..cf7d61f 100644 --- a/security/tomoyo/realpath.c +++ b/security/tomoyo/realpath.c @@ -88,29 +88,14 @@ int tomoyo_realpath_from_path2(struct path *path, char *newname, sp = dentry->d_op->d_dname(dentry, newname + offset, newname_len - offset); } else { - /* Taken from d_namespace_path(). */ - struct path root; - struct path ns_root = { }; - struct path tmp; + struct path ns_root = {.mnt = NULL, .dentry = NULL}; - read_lock(¤t->fs->lock); - root = current->fs->root; - path_get(&root); - read_unlock(¤t->fs->lock); - spin_lock(&vfsmount_lock); - if (root.mnt && root.mnt->mnt_ns) - ns_root.mnt = mntget(root.mnt->mnt_ns->root); - if (ns_root.mnt) - ns_root.dentry = dget(ns_root.mnt->mnt_root); - spin_unlock(&vfsmount_lock); spin_lock(&dcache_lock); - tmp = ns_root; - sp = __d_path(path, &tmp, newname, newname_len); + /* go to whatever namespace root we are under */ + sp = __d_path(path, &ns_root, newname, newname_len); 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) && + if (!IS_ERR(sp) && (path->mnt->mnt_flags & MNT_INTERNAL) && (path->mnt->mnt_sb->s_magic == PROC_SUPER_MAGIC)) { sp -= 5; if (sp >= newname) |