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-rw-r--r--source4/lib/util_str.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/source4/lib/util_str.c b/source4/lib/util_str.c
index 685cc52c65..ba952df9f6 100644
--- a/source4/lib/util_str.c
+++ b/source4/lib/util_str.c
@@ -705,6 +705,10 @@ char *strupper_talloc(TALLOC_CTX *ctx, const char *src)
{
size_t size=0;
char *dest;
+
+ if (!src) {
+ return NULL;
+ }
/* this takes advantage of the fact that upper/lower can't
change the length of a character by more than 1 byte */