guix/gnu/packages/patches/flac-CVE-2017-6888.patch

https://git.xiph.org/?p=flac.git;a=patch;h=4f47b63e9c971e6391590caf00a0f2a5ed612e67

From 4f47b63e9c971e6391590caf00a0f2a5ed612e67 Mon Sep 17 00:00:00 2001
From: Erik de Castro Lopo <erikd@mega-nerd.com>
Date: Sat, 8 Apr 2017 18:34:49 +1000
Subject: [PATCH] stream_decoder.c: Fix a memory leak

Leak reported by Secunia Research.
---
 src/libFLAC/stream_decoder.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/libFLAC/stream_decoder.c b/src/libFLAC/stream_decoder.c
index 14d5fe7f..a5527511 100644
--- a/src/libFLAC/stream_decoder.c
+++ b/src/libFLAC/stream_decoder.c
@@ -1753,6 +1753,9 @@ FLAC__bool read_metadata_vorbiscomment_(FLAC__StreamDecoder *decoder, FLAC__Stre
 					}
 					memset (obj->comments[i].entry, 0, obj->comments[i].length) ;
 					if (!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, obj->comments[i].entry, obj->comments[i].length)) {
+						/* Current i-th entry is bad, so we delete it. */
+						free (obj->comments[i].entry) ;
+						obj->comments[i].entry = NULL ;
 						obj->num_comments = i;
 						goto skip;
 					}
-- 
2.11.0