cmp: add null pointer check in tear_down test function

problem reported by: 2ourc3

Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
Reviewed-by: Tom Cosgrove <tom.cosgrove@arm.com>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/22355)

diff --git a/test/cmp_protect_test.c b/test/cmp_protect_test.c
index 0d2311fc29c7399daef440ad4d750d3d9925c702..89f342458ec4e58d7b7effba4102ec0104d85e3a 100644 (file)
--- a/test/cmp_protect_test.c
+++ b/test/cmp_protect_test.c
@@ -38,15 +38,17 @@ static OSSL_PROVIDER *default_null_provider = NULL, *provider = NULL;
 
 static void tear_down(CMP_PROTECT_TEST_FIXTURE *fixture)
 {
-    OSSL_CMP_CTX_free(fixture->cmp_ctx);
-    OSSL_CMP_MSG_free(fixture->msg);
-    OSSL_CMP_PKISI_free(fixture->si);
+    if (fixture != NULL) {
+        OSSL_CMP_CTX_free(fixture->cmp_ctx);
+        OSSL_CMP_MSG_free(fixture->msg);
+        OSSL_CMP_PKISI_free(fixture->si);
 
-    OPENSSL_free(fixture->mem);
-    sk_X509_free(fixture->certs);
-    sk_X509_free(fixture->chain);
+        OPENSSL_free(fixture->mem);
+        sk_X509_free(fixture->certs);
+        sk_X509_free(fixture->chain);
 
-    OPENSSL_free(fixture);
+        OPENSSL_free(fixture);
+    }
 }
 
 static CMP_PROTECT_TEST_FIXTURE *set_up(const char *const test_case_name)