VFS: collect_mounts() should return an ERR_PTR

This should actually be returning an ERR_PTR on error instead of NULL.
That was how it was designed and all the callers expect it.

[AV: actually, that's what "VFS: Make clone_mnt()/copy_tree()/collect_mounts()
return errors" missed - originally collect_mounts() was expected to return
NULL on failure]

Cc: <stable@vger.kernel.org> # 3.10+
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/namespace.c b/fs/namespace.c
index 7b1ca9b..a45ba4f 100644 (file)
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -1429,7 +1429,7 @@ struct vfsmount *collect_mounts(struct path *path)
                         CL_COPY_ALL | CL_PRIVATE);
        namespace_unlock();
        if (IS_ERR(tree))
-               return NULL;
+               return ERR_CAST(tree);
        return &tree->mnt;
 }