From: Timo Sirainen <timo.sirainen@open-xchange.com>
Date: Mon, 19 Jul 2021 11:56:47 +0000 (+0300)
Subject: lib-mail: Fix memory leak in istream-header-filter
X-Git-Tag: 2.3.17~329
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=eac71a2968b7cc82ebd319f2ae4601abf0ff1eeb;p=thirdparty%2Fdovecot%2Fcore.git

lib-mail: Fix memory leak in istream-header-filter

Broken by 1c1b77dbf9a548aac788efb76973ce2d0fa6c732
---

diff --git a/src/lib-mail/istream-header-filter.c b/src/lib-mail/istream-header-filter.c
index 4c5638c9cd..8bc28fb941 100644
--- a/src/lib-mail/istream-header-filter.c
+++ b/src/lib-mail/istream-header-filter.c
@@ -68,6 +68,11 @@ static void i_stream_header_filter_destroy(struct iostream_private *stream)
 		array_free(&mstream->match_change_lines);
 	if (!mstream->snapshot_pending)
 		buffer_free(&mstream->hdr_buf);
+	else {
+		/* Clear hdr_buf to make sure
+		   i_stream_header_filter_snapshot_free() frees it. */
+		mstream->hdr_buf = NULL;
+	}
 	pool_unref(&mstream->pool);
 }