[PATCH] Handle NULL names better

[Steve Dickson <steved@redhat.com>]

Detect when an application passes in NULL names
and fail gracefully instead of crashing hard.

Signed-off-by: Steve Dickson <steved@redhat.com>
---
 libnfsidmap.c | 5 ++++-
 nss.c         | 3 +++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/libnfsidmap.c b/libnfsidmap.c
index 833f94c..a8a9229 100644
--- a/libnfsidmap.c
+++ b/libnfsidmap.c
@@ -100,8 +100,11 @@ static char * toupper_str(char *s)
 
 static int id_as_chars(char *name, uid_t *id)
 {
-	long int value = strtol(name, NULL, 10);
+	long int value;
 
+	if (name == NULL)
+		return 0;
+	value = strtol(name, NULL, 10);
 	if (value == 0) {
 		/* zero value ids are valid */
 		if (strcmp(name, "0") != 0)
diff --git a/nss.c b/nss.c
index f8129fe..b3fef5a 100644
--- a/nss.c
+++ b/nss.c
@@ -135,6 +135,9 @@ static char *strip_domain(const char *name, const char *domain)
 	char *l = NULL;
 	int len;
 
+	if (name == NULL)
+		goto out;
+
 	c = strrchr(name, '@');
 	if (c == NULL && domain != NULL)
 		goto out;
-- 
2.1.0