wolfSSL/CyaSSL: Fix memory leak in Curl_cyassl_random

RNG structure must be freed by call to FreeRng after its use in
Curl_cyassl_random. This call fixes Valgrind failures when running the
test suite with wolfSSL.

Closes #2784

diff --git a/lib/vtls/cyassl.c b/lib/vtls/cyassl.c
index 0e940487a07d2bb4ad02daeeb3fb4f319e9fd145..e10398ac3f762ca2388945a9c06cd182a0459f00 100644 (file)
--- a/lib/vtls/cyassl.c
+++ b/lib/vtls/cyassl.c
@@ -968,6 +968,8 @@ static CURLcode Curl_cyassl_random(struct Curl_easy *data,
     return CURLE_FAILED_INIT;
   if(RNG_GenerateBlock(&rng, entropy, (unsigned)length))
     return CURLE_FAILED_INIT;
+  if(FreeRng(&rng))
+    return CURLE_FAILED_INIT;
   return CURLE_OK;
 }