From: Timo Sirainen <timo.sirainen@open-xchange.com>
Date: Mon, 7 Dec 2020 11:09:50 +0000 (+0200)
Subject: lib-dcrypt: istream-decrypt - Assert that max_buffer_size > 0
X-Git-Tag: 2.3.14.rc1~227
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=8b40060bf37b356bbe22c6cddbf8a0313c2364a5;p=thirdparty%2Fdovecot%2Fcore.git

lib-dcrypt: istream-decrypt - Assert that max_buffer_size > 0

Otherwise all reads return -2, which will just result in assert-crash in
i_stream_read().
---

diff --git a/src/lib-dcrypt/istream-decrypt.c b/src/lib-dcrypt/istream-decrypt.c
index ffa3513340..0956fdc15f 100644
--- a/src/lib-dcrypt/istream-decrypt.c
+++ b/src/lib-dcrypt/istream-decrypt.c
@@ -999,6 +999,8 @@ i_stream_create_decrypt_common(struct istream *input)
 {
 	struct decrypt_istream *dstream;
 
+	i_assert(input->real_stream->max_buffer_size > 0);
+
 	dstream = i_new(struct decrypt_istream, 1);
 	dstream->istream.max_buffer_size = input->real_stream->max_buffer_size;
 	dstream->istream.read = i_stream_decrypt_read;