lib510: don't write past the end of the buffer if it's too small

diff --git a/tests/libtest/lib510.c b/tests/libtest/lib510.c
index 68588cfe6c6caa56611b6e6d63959a8c696de801..4c290f1ef7c7aaa70d29c8da9679b5e7d3379dd2 100644 (file)
--- a/tests/libtest/lib510.c
+++ b/tests/libtest/lib510.c
@@ -48,6 +48,10 @@ static size_t read_callback(void *ptr, size_t size, size_t nmemb, void *userp)
 
   if(data) {
     size_t len = strlen(data);
+    if(size*nmemb < len) {
+      fprintf(stderr, "read buffer is too small to run test\n");
+      return 0;
+    }
     memcpy(ptr, data, len);
     pooh->counter++; /* advance pointer */
     return len;