media-libs/libmad: Fix vulnerabilities, EAPI-7 bump

Debian does it, so let's use it too.

Bug: https://bugs.gentoo.org/618022
Signed-off-by: Andreas Sturmlechner <asturm@gentoo.org>
Package-Manager: Portage-2.3.50, Repoman-2.3.11

2 files changed, 277 insertions, 0 deletions

diff --git a/media-libs/libmad/files/libmad-0.15.1b-CVE-2017-8372_CVE-2017-8373_CVE-2017-8374.patch b/media-libs/libmad/files/libmad-0.15.1b-CVE-2017-8372_CVE-2017-8373_CVE-2017-8374.patch
new file mode 100644
index 000000000000..9cc8913e159c
--- /dev/null
+++ b/media-libs/libmad/files/libmad-0.15.1b-CVE-2017-8372_CVE-2017-8373_CVE-2017-8374.patch
@@ -0,0 +1,197 @@
+; You can calculate where the next frame will start depending on things
+; like the bitrate. See mad_header_decode().  It seems that when decoding
+; the frame you can go past that boundary.  This attempts to catch those cases,
+; but might not catch all of them.
+; For more info see https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=508133
+Index: libmad-0.15.1b/layer12.c
+===================================================================
+--- a/layer12.c	2008-12-23 21:38:07.000000000 +0100
++++ b/layer12.c	2008-12-23 21:38:12.000000000 +0100
+@@ -134,6 +134,12 @@
+   for (sb = 0; sb < bound; ++sb) {
+     for (ch = 0; ch < nch; ++ch) {
+       nb = mad_bit_read(&stream->ptr, 4);
++	if (mad_bit_nextbyte(&stream->ptr) > stream->next_frame)
++	{
++		stream->error = MAD_ERROR_LOSTSYNC;
++		stream->sync = 0;
++		return -1;
++	}
+ 
+       if (nb == 15) {
+ 	stream->error = MAD_ERROR_BADBITALLOC;
+@@ -146,6 +152,12 @@
+ 
+   for (sb = bound; sb < 32; ++sb) {
+     nb = mad_bit_read(&stream->ptr, 4);
++	if (mad_bit_nextbyte(&stream->ptr) > stream->next_frame)
++	{
++		stream->error = MAD_ERROR_LOSTSYNC;
++		stream->sync = 0;
++		return -1;
++	}
+ 
+     if (nb == 15) {
+       stream->error = MAD_ERROR_BADBITALLOC;
+@@ -162,6 +174,12 @@
+     for (ch = 0; ch < nch; ++ch) {
+       if (allocation[ch][sb]) {
+ 	scalefactor[ch][sb] = mad_bit_read(&stream->ptr, 6);
++	if (mad_bit_nextbyte(&stream->ptr) > stream->next_frame)
++	{
++		stream->error = MAD_ERROR_LOSTSYNC;
++		stream->sync = 0;
++		return -1;
++	}
+ 
+ # if defined(OPT_STRICT)
+ 	/*
+@@ -187,6 +205,12 @@
+ 	frame->sbsample[ch][s][sb] = nb ?
+ 	  mad_f_mul(I_sample(&stream->ptr, nb),
+ 		    sf_table[scalefactor[ch][sb]]) : 0;
++	if (mad_bit_nextbyte(&stream->ptr) > stream->next_frame)
++	{
++		stream->error = MAD_ERROR_LOSTSYNC;
++		stream->sync = 0;
++		return -1;
++	}
+       }
+     }
+ 
+@@ -195,6 +219,12 @@
+ 	mad_fixed_t sample;
+ 
+ 	sample = I_sample(&stream->ptr, nb);
++	if (mad_bit_nextbyte(&stream->ptr) > stream->next_frame)
++	{
++		stream->error = MAD_ERROR_LOSTSYNC;
++		stream->sync = 0;
++		return -1;
++	}
+ 
+ 	for (ch = 0; ch < nch; ++ch) {
+ 	  frame->sbsample[ch][s][sb] =
+@@ -403,7 +433,15 @@
+     nbal = bitalloc_table[offsets[sb]].nbal;
+ 
+     for (ch = 0; ch < nch; ++ch)
++    {
+       allocation[ch][sb] = mad_bit_read(&stream->ptr, nbal);
++	if (mad_bit_nextbyte(&stream->ptr) > stream->next_frame)
++	{
++		stream->error = MAD_ERROR_LOSTSYNC;
++		stream->sync = 0;
++		return -1;
++	}
++    }
+   }
+ 
+   for (sb = bound; sb < sblimit; ++sb) {
+@@ -411,6 +449,13 @@
+ 
+     allocation[0][sb] =
+     allocation[1][sb] = mad_bit_read(&stream->ptr, nbal);
++
++	if (mad_bit_nextbyte(&stream->ptr) > stream->next_frame)
++	{
++		stream->error = MAD_ERROR_LOSTSYNC;
++		stream->sync = 0;
++		return -1;
++	}
+   }
+ 
+   /* decode scalefactor selection info */
+@@ -419,6 +464,12 @@
+     for (ch = 0; ch < nch; ++ch) {
+       if (allocation[ch][sb])
+ 	scfsi[ch][sb] = mad_bit_read(&stream->ptr, 2);
++	if (mad_bit_nextbyte(&stream->ptr) > stream->next_frame)
++	{
++		stream->error = MAD_ERROR_LOSTSYNC;
++		stream->sync = 0;
++		return -1;
++	}
+     }
+   }
+ 
+@@ -442,6 +493,12 @@
+     for (ch = 0; ch < nch; ++ch) {
+       if (allocation[ch][sb]) {
+ 	scalefactor[ch][sb][0] = mad_bit_read(&stream->ptr, 6);
++	if (mad_bit_nextbyte(&stream->ptr) > stream->next_frame)
++	{
++		stream->error = MAD_ERROR_LOSTSYNC;
++		stream->sync = 0;
++		return -1;
++	}
+ 
+ 	switch (scfsi[ch][sb]) {
+ 	case 2:
+@@ -452,11 +509,23 @@
+ 
+ 	case 0:
+ 	  scalefactor[ch][sb][1] = mad_bit_read(&stream->ptr, 6);
++		if (mad_bit_nextbyte(&stream->ptr) > stream->next_frame)
++		{
++			stream->error = MAD_ERROR_LOSTSYNC;
++			stream->sync = 0;
++			return -1;
++		}
+ 	  /* fall through */
+ 
+ 	case 1:
+ 	case 3:
+ 	  scalefactor[ch][sb][2] = mad_bit_read(&stream->ptr, 6);
++		if (mad_bit_nextbyte(&stream->ptr) > stream->next_frame)
++		{
++			stream->error = MAD_ERROR_LOSTSYNC;
++			stream->sync = 0;
++			return -1;
++		}
+ 	}
+ 
+ 	if (scfsi[ch][sb] & 1)
+@@ -488,6 +557,12 @@
+ 	  index = offset_table[bitalloc_table[offsets[sb]].offset][index - 1];
+ 
+ 	  II_samples(&stream->ptr, &qc_table[index], samples);
++		if (mad_bit_nextbyte(&stream->ptr) > stream->next_frame)
++		{
++			stream->error = MAD_ERROR_LOSTSYNC;
++			stream->sync = 0;
++			return -1;
++		}
+ 
+ 	  for (s = 0; s < 3; ++s) {
+ 	    frame->sbsample[ch][3 * gr + s][sb] =
+@@ -506,6 +581,12 @@
+ 	index = offset_table[bitalloc_table[offsets[sb]].offset][index - 1];
+ 
+ 	II_samples(&stream->ptr, &qc_table[index], samples);
++	if (mad_bit_nextbyte(&stream->ptr) > stream->next_frame)
++	{
++		stream->error = MAD_ERROR_LOSTSYNC;
++		stream->sync = 0;
++		return -1;
++	}
+ 
+ 	for (ch = 0; ch < nch; ++ch) {
+ 	  for (s = 0; s < 3; ++s) {
+Index: libmad-0.15.1b/layer3.c
+===================================================================
+--- a/layer3.c	2008-12-23 21:38:07.000000000 +0100
++++ b/layer3.c	2008-12-23 21:38:12.000000000 +0100
+@@ -2608,6 +2608,12 @@
+     next_md_begin = 0;
+ 
+   md_len = si.main_data_begin + frame_space - next_md_begin;
++  if (md_len + MAD_BUFFER_GUARD > MAD_BUFFER_MDLEN)
++  {
++	stream->error = MAD_ERROR_LOSTSYNC;
++	stream->sync = 0;
++	return -1;
++  }
+ 
+   frame_used = 0;
+ 
diff --git a/media-libs/libmad/libmad-0.15.1b-r9.ebuild b/media-libs/libmad/libmad-0.15.1b-r9.ebuild
new file mode 100644
index 000000000000..2740db068570
--- /dev/null
+++ b/media-libs/libmad/libmad-0.15.1b-r9.ebuild
@@ -0,0 +1,80 @@
+# Copyright 1999-2018 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+inherit autotools flag-o-matic multilib-minimal
+
+DESCRIPTION="\"M\"peg \"A\"udio \"D\"ecoder library"
+HOMEPAGE="http://mad.sourceforge.net"
+SRC_URI="mirror://sourceforge/mad/${P}.tar.gz"
+
+LICENSE="GPL-2"
+SLOT="0"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~mips ~ppc ~ppc64 ~sh ~sparc ~x86 ~ppc-aix ~amd64-fbsd ~x86-fbsd ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~x86-macos ~sparc-solaris ~x86-solaris"
+IUSE="debug static-libs"
+
+DEPEND=""
+RDEPEND=""
+
+DOCS=( CHANGES CREDITS README TODO VERSION )
+
+MULTILIB_WRAPPED_HEADERS=(
+	/usr/include/mad.h
+)
+
+PATCHES=(
+	"${FILESDIR}"/${P}-cflags.patch
+	"${FILESDIR}"/${P}-cflags-O2.patch
+	"${FILESDIR}"/${P}-gcc44-mips-h-constraint-removal.patch
+	"${FILESDIR}"/${P}-CVE-2017-8372_CVE-2017-8373_CVE-2017-8374.patch
+)
+
+src_prepare() {
+	default
+
+	# bug 467002
+	sed -e 's/AM_CONFIG_HEADER/AC_CONFIG_HEADERS/' -i configure.ac || die
+
+	eautoreconf
+}
+
+multilib_src_configure() {
+	# --enable-speed		 optimize for speed over accuracy
+	# --enable-accuracy		 optimize for accuracy over speed
+	# --enable-experimental	 enable code using the EXPERIMENTAL
+	#						 preprocessor define
+	local myconf=(
+		--enable-accuracy
+		$(use_enable debug debugging)
+		$(use_enable static-libs static)
+	)
+
+	# Fix for b0rked sound on sparc64 (maybe also sparc32?)
+	# default/approx is also possible, uses less cpu but sounds worse
+	use sparc && myconf+=( --enable-fpm=64bit )
+
+	[[ $(tc-arch) == "amd64" ]] && myconf+=( --enable-fpm=64bit )
+	[[ $(tc-arch) == "x86" ]] && myconf+=( --enable-fpm=intel )
+	[[ $(tc-arch) == "ppc" ]] && myconf+=( --enable-fpm=default )
+	[[ $(tc-arch) == "ppc64" ]] && myconf+=( --enable-fpm=64bit )
+
+	ECONF_SOURCE="${S}" econf "${myconf[@]}"
+}
+
+multilib_src_install() {
+	emake DESTDIR="${D}" install
+
+	# This file must be updated with each version update
+	insinto /usr/$(get_libdir)/pkgconfig
+	doins "${FILESDIR}"/mad.pc
+
+	# Use correct libdir in pkgconfig file
+	sed -e "s:^libdir.*:libdir=${EPREFIX}/usr/$(get_libdir):" \
+		-i "${ED}"/usr/$(get_libdir)/pkgconfig/mad.pc
+}
+
+multilib_src_install_all() {
+	einstalldocs
+	find "${D}" -name '*.la' -delete || die
+}