uuid: Fix crashing if a NULL string is passed to bt_string_to_uuid

bt_string_to_uuid shall chack if the string is valid before attempting
to access its contents.

Signed-off-by: Manika Shrivastava <manika.sh@samsung.com>
Signed-off-by: Ayush Garg <ayush.garg@samsung.com>

diff --git a/lib/uuid.c b/lib/uuid.c
index 3d97dc8..1d2e1f7 100755 (executable)
--- a/lib/uuid.c
+++ b/lib/uuid.c
@@ -251,6 +251,9 @@ static int bt_string_to_uuid128(bt_uuid_t *uuid, const char *string)
 
 int bt_string_to_uuid(bt_uuid_t *uuid, const char *string)
 {
+       if (!string)
+               return -EINVAL;
+
        if (is_base_uuid128(string))
                return bt_string_to_uuid16(uuid, string + 4);
        else if (is_uuid128(string))