gnu: mpg321: Fix CVE-2019-14247.

* gnu/packages/patches/mpg321-CVE-2019-14247.patch: New file.
* gnu/local.mk (dist_patch_DATA): Register it.
* gnu/packages/mp3.scm (mpg321)[source]: Apply it.

Signed-off-by: Léo Le Bouter <lle-bout@zaclys.net>
Signed-off-by: Leo Famulari <leo@famulari.name>

gnu/local.mk

@@ -1404,6 +1404,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/mit-krb5-hurd.patch			\
   %D%/packages/patches/mit-krb5-qualify-short-hostnames.patch	\
   %D%/packages/patches/mpc123-initialize-ao.patch		\
+  %D%/packages/patches/mpg321-CVE-2019-14247.patch		\
   %D%/packages/patches/module-init-tools-moduledir.patch	\
   %D%/packages/patches/monero-use-system-miniupnpc.patch			\
   %D%/packages/patches/mono-mdoc-timestamping.patch		\

gnu/packages/mp3.scm

@@ -408,7 +408,9 @@ command-line tool as well as a C library, libmpg123.")
                                  version "/mpg321-" version ".tar.gz"))
              (sha256
               (base32
-               "0ki8mh76bbmdh77qsiw682dvi8y468yhbdabqwg05igmwc1wqvq5"))))
+               "0ki8mh76bbmdh77qsiw682dvi8y468yhbdabqwg05igmwc1wqvq5"))
+             (patches
+              (search-patches "mpg321-CVE-2019-14247.patch"))))
     (build-system gnu-build-system)
     (arguments '(#:configure-flags '("--disable-alsa")))
     (inputs

gnu/packages/patches/mpg321-CVE-2019-14247.patch

@@ -0,0 +1,23 @@
+This patch was downloaded from https://sourceforge.net/p/mpg321/bugs/51/ and
+fixes CVE-2019-14247.
+
+Description: Handle illegal bitrate value
+Author: Chrysostomos Nanakos <cnanakos@debian.org>
+Bug-Debian: https://bugs.debian.org/870406
+Bug-Debian: https://bugs.debian.org/887057
+
+--- mpg321-0.3.2.orig/mad.c
++++ mpg321-0.3.2/mad.c
+@@ -574,6 +574,12 @@ void scan(void const *ptr, ssize_t len,
+ 
+     if (!is_vbr)
+     {
++	if (header.bitrate <= 0)                                                
++        {                                                                       
++            fprintf(stderr, "Illegal bit allocation value\n");                                                                              
++            return;                                                             
++        }    
++
+         double time = (len * 8.0) / (header.bitrate); /* time in seconds */
+         double timefrac = (double)time - ((long)(time));
+         long nsamples = 32 * MAD_NSBSAMPLES(&header); /* samples per frame */