QUIC: Test crypto stream FC limits

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from #21547)

test/quic_multistream_test.c

@@ -3045,7 +3045,7 @@ static int script_42_inject_plain(struct helper *h, QUIC_PKT_HDR *hdr,
         return 0;
 
     if (!TEST_true(WPACKET_quic_write_vlint(&wpkt, OSSL_QUIC_FRAME_TYPE_CRYPTO))
-        || !TEST_true(WPACKET_quic_write_vlint(&wpkt, (((uint64_t)1) << 62) - 1))
+        || !TEST_true(WPACKET_quic_write_vlint(&wpkt, h->inject_word1))
         || !TEST_true(WPACKET_quic_write_vlint(&wpkt, 1))
         || !TEST_true(WPACKET_put_bytes_u8(&wpkt, 0x42)))
         goto err;
@@ -3077,14 +3077,35 @@ static const struct script_op script_42[] = {
     OP_S_BIND_STREAM_ID     (a, C_BIDI_ID(0))
     OP_S_READ_EXPECT        (a, "apple", 5)
 
-    OP_SET_INJECT_WORD      (1, 0)
+    OP_SET_INJECT_WORD      (1, (((uint64_t)1) << 62) - 1)
     OP_S_WRITE              (a, "orange", 6)
 
     OP_C_EXPECT_CONN_CLOSE_INFO(QUIC_ERR_FRAME_ENCODING_ERROR,0,0)
 
     OP_END
 };
 
+/* 43. Fault injection - CRYPTO frame exceeding FC */
+static const struct script_op script_43[] = {
+    OP_S_SET_INJECT_PLAIN   (script_42_inject_plain)
+    OP_C_SET_ALPN           ("ossltest")
+    OP_C_CONNECT_WAIT       ()
+    OP_C_SET_DEFAULT_STREAM_MODE(SSL_DEFAULT_STREAM_MODE_NONE)
+
+    OP_C_NEW_STREAM_BIDI    (a, C_BIDI_ID(0))
+    OP_C_WRITE              (a, "apple", 5)
+
+    OP_S_BIND_STREAM_ID     (a, C_BIDI_ID(0))
+    OP_S_READ_EXPECT        (a, "apple", 5)
+
+    OP_SET_INJECT_WORD      (1, 0x100000 /* 1 MiB */)
+    OP_S_WRITE              (a, "orange", 6)
+
+    OP_C_EXPECT_CONN_CLOSE_INFO(QUIC_ERR_CRYPTO_BUFFER_EXCEEDED,0,0)
+
+    OP_END
+};
+
 static const struct script_op *const scripts[] = {
     script_1,
     script_2,
@@ -3128,6 +3149,7 @@ static const struct script_op *const scripts[] = {
     script_40,
     script_41,
     script_42,
+    script_43,
 };
 
 static int test_script(int idx)