From: Timo Sirainen <tss@iki.fi>
Date: Wed, 7 May 2014 09:26:58 +0000 (+0300)
Subject: lib-compression: istream-lz4 shouldn't crash when closing the stream multiple times.
X-Git-Tag: 2.2.13.rc1~36
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=f6a21dbf70e816c33bfb1ce91728d06bd7d5758f;p=thirdparty%2Fdovecot%2Fcore.git

lib-compression: istream-lz4 shouldn't crash when closing the stream multiple times.
---

diff --git a/src/lib-compression/istream-lz4.c b/src/lib-compression/istream-lz4.c
index 8e5e085b11..a67b5725c9 100644
--- a/src/lib-compression/istream-lz4.c
+++ b/src/lib-compression/istream-lz4.c
@@ -29,7 +29,8 @@ static void i_stream_lz4_close(struct iostream_private *stream,
 {
 	struct lz4_istream *zstream = (struct lz4_istream *)stream;
 
-	buffer_free(&zstream->chunk_buf);
+	if (zstream->chunk_buf != NULL)
+		buffer_free(&zstream->chunk_buf);
 	if (close_parent)
 		i_stream_close(zstream->istream.parent);
 }