fs: check getname() return value in open()

getname() can return an error when for example the input path is an
empty string. Check the getname() return value in open() before
further using it.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 7 insertions, 1 deletions

diff --git a/fs/fs.c b/fs/fs.c
index 2eaf7eaa37..f4baba81e7 100644
--- a/fs/fs.c
+++ b/fs/fs.c
@@ -2368,8 +2368,14 @@ int open(const char *pathname, int flags, ...)
 	struct dentry *dentry = NULL;
 	struct nameidata nd;
 	const char *s;
+	struct filename *filename;
+
+	filename = getname(pathname);
+	if (IS_ERR(filename))
+		return PTR_ERR(filename);
+
+	set_nameidata(&nd, AT_FDCWD, filename);
 
-	set_nameidata(&nd, AT_FDCWD, getname(pathname));
 	s = path_init(&nd, LOOKUP_FOLLOW);
 
 	while (1) {