From: Aki Tuomi <aki.tuomi@open-xchange.com>
Date: Thu, 20 Aug 2020 06:44:58 +0000 (+0300)
Subject: lib-mail: test-istream-attachment - Avoid unsigned overflow in size calculation
X-Git-Tag: 2.3.13~196
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3a5ebc8e80cd2e00471bc07c3f2196a6d449c391;p=thirdparty%2Fdovecot%2Fcore.git

lib-mail: test-istream-attachment - Avoid unsigned overflow in size calculation
---

diff --git a/src/lib-mail/test-istream-attachment.c b/src/lib-mail/test-istream-attachment.c
index 26cf2340f8..74887e84f6 100644
--- a/src/lib-mail/test-istream-attachment.c
+++ b/src/lib-mail/test-istream-attachment.c
@@ -303,8 +303,8 @@ static int test_input_stream(struct istream *file_input)
 	/* try with a wrong message size */
 	for (int i = 0; i < 2; i++) {
 		input2 = i_stream_create_from_data(base_buf->data, base_buf->used);
-		input = test_build_original_istream(input2, orig_msg_size +
-						    (i == 0 ? 1 : -1));
+		input = test_build_original_istream(input2,
+				i == 0 ? orig_msg_size + 1 : orig_msg_size - 1);
 		i_stream_unref(&input2);
 		while (i_stream_read_more(input, &data, &size) > 0)
 			i_stream_skip(input, size);