Fix opusenc buffer overflow, channel integer overflow, and division

by zero.  (Same code as vorbis-tools oggenc.)

PR:		202941
Obtained from:	https://trac.xiph.org/ticket/2212
Obtained from:	https://trac.xiph.org/changeset/19117
Obtained from:	Fedora vorbis-tools Git (commit 63a1a62d)
Security:	CVE-2015-6749
Security:	CVE-2014-9638
Security:	CVE-2014-9639
Security:	a35f415d-572a-11e5-b0a4-f8b156b6dcc8
MFH:		2015Q3

2 files changed, 86 insertions, 1 deletions

diff --git a/audio/opus-tools/Makefile b/audio/opus-tools/Makefile
index 3c731542aa3..08135710a0f 100644
--- a/audio/opus-tools/Makefile
+++ b/audio/opus-tools/Makefile
@@ -2,7 +2,7 @@
 
 PORTNAME=	opus-tools
 PORTVERSION=	0.1.9
-PORTREVISION=	1
+PORTREVISION=	2
 CATEGORIES=	audio
 MASTER_SITES=	http://downloads.xiph.org/releases/opus/ \
 		MOZILLA/opus
diff --git a/audio/opus-tools/files/patch-src_audio-in.c b/audio/opus-tools/files/patch-src_audio-in.c
new file mode 100644
index 00000000000..8c72337c9c3
--- /dev/null
+++ b/audio/opus-tools/files/patch-src_audio-in.c
@@ -0,0 +1,85 @@
+--- src/audio-in.c.orig	2014-02-26 00:55:47 UTC
++++ src/audio-in.c
+@@ -42,6 +42,7 @@
+ # define _FILE_OFFSET_BITS 64
+ #endif
+ 
++#include <limits.h>
+ #include <stdlib.h>
+ #include <stdio.h>
+ #include <string.h>
+@@ -287,13 +288,14 @@ static int aiff_permute_matrix[6][6] =
+ int aiff_open(FILE *in, oe_enc_opt *opt, unsigned char *buf, int buflen)
+ {
+     int aifc; /* AIFC or AIFF? */
+-    unsigned int len;
+-    unsigned char *buffer;
++    unsigned int len, readlen;
++    unsigned char buffer[22];
+     unsigned char buf2[8];
+     int bigendian = 1;
+     aiff_fmt format;
+     aifffile *aiff;
+     int i;
++    long channels;
+     (void)buflen;/*unused*/
+ 
+     if(buf[11]=='C')
+@@ -313,19 +315,25 @@ int aiff_open(FILE *in, oe_enc_opt *opt,
+         return 0; /* Weird common chunk */
+     }
+ 
+-    buffer = alloca(len);
+-
+-    if(fread(buffer,1,len,in) < len)
++    readlen = len < sizeof(buffer) ? len : sizeof(buffer);
++    if(fread(buffer,1,readlen,in) < readlen ||
++        (len > readlen && !seek_forward(in, len-readlen)))
+     {
+         fprintf(stderr, _("Warning: Unexpected EOF reading AIFF header\n"));
+         return 0;
+     }
+ 
+-    format.channels = READ_U16_BE(buffer);
++    format.channels = channels = READ_U16_BE(buffer);
+     format.totalframes = READ_U32_BE(buffer+2);
+     format.samplesize = READ_U16_BE(buffer+6);
+     format.rate = (int)read_IEEE80(buffer+8);
+ 
++    if(channels <= 0L || SHRT_MAX < channels)
++    {
++        fprintf(stderr, _("Warning: Unsupported count of channels in AIFF header\n"));
++        return 0;
++    }
++
+     if(aifc)
+     {
+         if(len < 22)
+@@ -442,6 +450,7 @@ int wav_open(FILE *in, oe_enc_opt *opt, 
+     wav_fmt format;
+     wavfile *wav;
+     int i;
++    long channels;
+     (void)buflen;/*unused*/
+     (void)oldbuf;/*unused*/
+ 
+@@ -481,12 +490,18 @@ int wav_open(FILE *in, oe_enc_opt *opt, 
+     }
+ 
+     format.format =      READ_U16_LE(buf);
+-    format.channels =    READ_U16_LE(buf+2);
++    format.channels = channels = READ_U16_LE(buf+2);
+     format.samplerate =  READ_U32_LE(buf+4);
+     format.bytespersec = READ_U32_LE(buf+8);
+     format.align =       READ_U16_LE(buf+12);
+     format.samplesize =  READ_U16_LE(buf+14);
+ 
++    if(channels <= 0L || SHRT_MAX < channels)
++    {
++        fprintf(stderr, _("Warning: Unsupported count of channels in WAV header\n"));
++        return 0;
++    }
++
+     if(format.format == -2) /* WAVE_FORMAT_EXTENSIBLE */
+     {
+       if(len<40)