File openssl-CVE-2022-4450-2of2.patch of Package openssl-1_1.27651

commit 075039740c6981d9b9a90ab3a8a6879d3014a987
Author: Matt Caswell <matt@openssl.org>
Date:   Tue Dec 13 15:02:26 2022 +0000

    Add a test for CVE-2022-4450
    
    Call PEM_read_bio_ex() and expect a failure. There should be no dangling
    ptrs and therefore there should be no double free if we free the ptrs on
    error.

diff --git a/test/pemtest.c b/test/pemtest.c
index 3203d976be..edeb0a1205 100644
--- a/test/pemtest.c
+++ b/test/pemtest.c
@@ -83,9 +83,39 @@ static int test_invalid(void)
     return 1;
 }
 
+static int test_empty_payload(void)
+{
+    BIO *b;
+    static char *emptypay =
+        "-----BEGIN CERTIFICATE-----\n"
+        "-\n" /* Base64 EOF character */
+        "-----END CERTIFICATE-----";
+    char *name = NULL, *header = NULL;
+    unsigned char *data = NULL;
+    long len;
+    int ret = 0;
+
+    b = BIO_new_mem_buf(emptypay, strlen(emptypay));
+    if (!TEST_ptr(b))
+        return 0;
+
+    /* Expected to fail because the payload is empty */
+    if (!TEST_false(PEM_read_bio_ex(b, &name, &header, &data, &len, 0)))
+        goto err;
+
+    ret = 1;
+ err:
+    OPENSSL_free(name);
+    OPENSSL_free(header);
+    OPENSSL_free(data);
+    BIO_free(b);
+    return ret;
+}
+
 int setup_tests(void)
 {
     ADD_ALL_TESTS(test_b64, OSSL_NELEM(b64_pem_data));
     ADD_TEST(test_invalid);
+    ADD_TEST(test_empty_payload);
     return 1;
 }