test: Do not fail if packet cannot be extended in QUIC multistream test

In some specific timings, the qtest_fault_resize_plain_packet function
returns failure as there is not enough space in allocated buffer.

There is no way to recover in this situation, let print
information and keep the test finish instead of failure
in TEST_error() call.

This patch fixes test runs on Windows where I can reproduce
this quite reliably.

Signed-off-by: Milan Broz <gmazyland@gmail.com>
Reviewed-by: Saša Nedvědický <sashan@openssl.org>
Reviewed-by: Norbert Pocs <norbertp@openssl.org>
MergeDate: Thu Mar 19 09:17:59 2026
(Merged from https://github.com/openssl/openssl/pull/30461)

diff --git a/test/helpers/quictestlib.c b/test/helpers/quictestlib.c
index a0df212074bd3fad662407846979dffe213858d7..5405df6ebf3edf0830739b20f2a1cd34288b63ab 100644 (file)
--- a/test/helpers/quictestlib.c
+++ b/test/helpers/quictestlib.c
@@ -930,9 +930,10 @@ int qtest_fault_prepend_frame(QTEST_FAULT *fault, const unsigned char *frame,
     old_len = fault->pplainio.buf_len;
 
     /* Extend the size of the packet by the size of the new frame */
-    if (!TEST_true(qtest_fault_resize_plain_packet(fault,
-            old_len + frame_len)))
+    if (!qtest_fault_resize_plain_packet(fault, old_len + frame_len)) {
+        TEST_info("Cannot extend packet (%zu + %zu)", old_len, frame_len);
         return 0;
+    }
 
     memmove(buf + frame_len, buf, old_len);
     memcpy(buf, frame, frame_len);