gentoo-overlay/media-libs/libsndfile/files/libsndfile-1.0.28-CVE-2017-6892.patch

From f833c53cb596e9e1792949f762e0b33661822748 Mon Sep 17 00:00:00 2001
From: Erik de Castro Lopo <erikd@mega-nerd.com>
Date: Tue, 23 May 2017 20:15:24 +1000
Subject: [PATCH] src/aiff.c: Fix a buffer read overflow

Secunia Advisory SA76717.

Found by: Laurent Delosieres, Secunia Research at Flexera Software
---
 src/aiff.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/aiff.c b/src/aiff.c
index 5b5f9f53..45864b76 100644
--- a/src/aiff.c
+++ b/src/aiff.c
@@ -1759,7 +1759,7 @@ aiff_read_chanmap (SF_PRIVATE * psf, unsigned dword)
 		psf_binheader_readf (psf, "j", dword - bytesread) ;
 
 	if (map_info->channel_map != NULL)
-	{	size_t chanmap_size = psf->sf.channels * sizeof (psf->channel_map [0]) ;
+	{	size_t chanmap_size = SF_MIN (psf->sf.channels, layout_tag & 0xffff) * sizeof (psf->channel_map [0]) ;
 
 		free (psf->channel_map) ;