X509_VERIFY_PARAM_free: Check param for NULL

Reviewed-by: Viktor Dukhovni <openssl-users@dukhovni.org>
(cherry picked from commit f49baeff50d0be9c8d86aed6fb4a08841aa3da41)

diff --git a/crypto/x509/x509_vpm.c b/crypto/x509/x509_vpm.c
index d0543662c08c92f37809f1992303f6b0b69f782a..6b0bf8a6e69e696424c770af942fe051b2a15f81 100644 (file)
--- a/crypto/x509/x509_vpm.c
+++ b/crypto/x509/x509_vpm.c
@@ -100,6 +100,8 @@ X509_VERIFY_PARAM *X509_VERIFY_PARAM_new(void)
 
 void X509_VERIFY_PARAM_free(X509_VERIFY_PARAM *param)
 {
+    if (param == NULL)
+        return;
     x509_verify_param_zero(param);
     OPENSSL_free(param);
 }