gnu: libsndfile: Add fixes for CVE-2014-9496 and CVE-2015-7805.

* gnu/packages/patches/libsndfile-CVE-2014-9496.patch,
  gnu/packages/patches/libsndfile-CVE-2015-7805.patch: New files.
* gnu-system.am (dist_patch_DATA): Add them.
* gnu/packages/pulseaudio.scm (libsndfile)[source]: Add patches.

gnu-system.am

@@ -557,6 +557,8 @@ dist_patch_DATA =						\
   gnu/packages/patches/librsvg-tests.patch			\
   gnu/packages/patches/libtheora-config-guess.patch		\
   gnu/packages/patches/libtool-skip-tests2.patch		\
+  gnu/packages/patches/libsndfile-CVE-2014-9496.patch		\
+  gnu/packages/patches/libsndfile-CVE-2015-7805.patch		\
   gnu/packages/patches/libssh-CVE-2014-0017.patch		\
   gnu/packages/patches/libunwind-CVE-2015-3239.patch		\
   gnu/packages/patches/libwmf-CAN-2004-0941.patch		\

gnu/packages/patches/libsndfile-CVE-2014-9496.patch

+Copied from Fedora.
+
+http://pkgs.fedoraproject.org/cgit/libsndfile.git/plain/libsndfile-1.0.25-cve2014_9496.patch
+
+diff -up libsndfile-1.0.25/src/sd2.c.cve2014_9496 libsndfile-1.0.25/src/sd2.c
+--- libsndfile-1.0.25/src/sd2.c.cve2014_9496	2011-01-19 11:10:36.000000000 +0100
++++ libsndfile-1.0.25/src/sd2.c	2015-01-13 17:00:35.920285526 +0100
+@@ -395,6 +395,21 @@ read_marker (const unsigned char * data,
+ 		return 0x666 ;
+ } /* read_marker */
+ 
++static inline int
++read_rsrc_marker (const SD2_RSRC *prsrc, int offset)
++{	const unsigned char * data = prsrc->rsrc_data ;
++
++	if (offset < 0 || offset + 3 >= prsrc->rsrc_len)
++		return 0 ;
++
++	if (CPU_IS_BIG_ENDIAN)
++		return (((uint32_t) data [offset]) << 24) + (data [offset + 1] << 16) + (data [offset + 2] << 8) + data [offset + 3] ;
++	if (CPU_IS_LITTLE_ENDIAN)
++		return data [offset] + (data [offset + 1] << 8) + (data [offset + 2] << 16) + (((uint32_t) data [offset + 3]) << 24) ;
++
++	return 0 ;
++} /* read_rsrc_marker */
++
+ static void
+ read_str (const unsigned char * data, int offset, char * buffer, int buffer_len)
+ {	int k ;
+@@ -496,6 +511,11 @@ sd2_parse_rsrc_fork (SF_PRIVATE *psf)
+ 
+ 	rsrc.type_offset = rsrc.map_offset + 30 ;
+ 
++	if (rsrc.map_offset + 28 > rsrc.rsrc_len)
++	{       psf_log_printf (psf, "Bad map offset.\n") ;
++		goto parse_rsrc_fork_cleanup ;
++		} ;
++
+ 	rsrc.type_count = read_short (rsrc.rsrc_data, rsrc.map_offset + 28) + 1 ;
+ 	if (rsrc.type_count < 1)
+ 	{	psf_log_printf (psf, "Bad type count.\n") ;
+@@ -512,7 +532,12 @@ sd2_parse_rsrc_fork (SF_PRIVATE *psf)
+ 
+ 	rsrc.str_index = -1 ;
+ 	for (k = 0 ; k < rsrc.type_count ; k ++)
+-	{	marker = read_marker (rsrc.rsrc_data, rsrc.type_offset + k * 8) ;
++	{	if (rsrc.type_offset + k * 8 > rsrc.rsrc_len)
++		{	psf_log_printf (psf, "Bad rsrc marker.\n") ;
++			goto parse_rsrc_fork_cleanup ;
++			} ;
++
++		marker = read_rsrc_marker (&rsrc, rsrc.type_offset + k * 8) ;
+ 
+ 		if (marker == STR_MARKER)
+ 		{	rsrc.str_index = k ;

gnu/packages/patches/libsndfile-CVE-2015-7805.patch

+Slightly modified to apply cleanly to libsndfile-1.0.25.
+
+From d2a87385c1ca1d72918e9a2875d24f202a5093e8 Mon Sep 17 00:00:00 2001
+From: Erik de Castro Lopo <erikd@mega-nerd.com>
+Date: Sat, 7 Feb 2015 15:45:10 +1100
+Subject: [PATCH] src/common.c : Fix a header parsing bug.
+
+When the file header is bigger that SF_HEADER_LEN, the code would seek
+instead of reading causing file parse errors.
+
+The current header parsing and writing code *badly* needs a re-write.
+---
+ src/common.c | 27 +++++++++++----------------
+ 1 file changed, 11 insertions(+), 16 deletions(-)
+
+diff --git a/src/common.c b/src/common.c
+index dd4edb7..c6b88cc 100644
+--- a/src/common.c
++++ b/src/common.c
+@@ -1,5 +1,5 @@
+ /*
+-** Copyright (C) 1999-2011 Erik de Castro Lopo <erikd@mega-nerd.com>
++** Copyright (C) 1999-2015 Erik de Castro Lopo <erikd@mega-nerd.com>
+ **
+ ** This program is free software; you can redistribute it and/or modify
+ ** it under the terms of the GNU Lesser General Public License as published by
+@@ -800,21 +800,16 @@ header_read (SF_PRIVATE *psf, void *ptr, int bytes)
+ {	int count = 0 ;
+ 
+ 	if (psf->headindex >= SIGNED_SIZEOF (psf->header))
+-	{	memset (ptr, 0, SIGNED_SIZEOF (psf->header) - psf->headindex) ;
+-
+-		/* This is the best that we can do. */
+-		psf_fseek (psf, bytes, SEEK_CUR) ;
+-		return bytes ;
+-		} ;
++		return psf_fread (ptr, 1, bytes, psf) ;
+ 
+ 	if (psf->headindex + bytes > SIGNED_SIZEOF (psf->header))
+ 	{	int most ;
+ 
+ 		most = SIGNED_SIZEOF (psf->header) - psf->headindex ;
+ 		psf_fread (psf->header + psf->headend, 1, most, psf) ;
+-		memset ((char *) ptr + most, 0, bytes - most) ;
+-
+-		psf_fseek (psf, bytes - most, SEEK_CUR) ;
++		memcpy (ptr, psf->header + psf->headend, most) ;
++		psf->headend = psf->headindex += most ;
++		psf_fread ((char *) ptr + most, bytes - most, 1, psf) ;
+ 		return bytes ;
+ 		} ;
+ 
+@@ -822,7 +817,7 @@ header_read (SF_PRIVATE *psf, void *ptr, int bytes)
+ 	{	count = psf_fread (psf->header + psf->headend, 1, bytes - (psf->headend - psf->headindex), psf) ;
+ 		if (count != bytes - (int) (psf->headend - psf->headindex))
+ 		{	psf_log_printf (psf, "Error : psf_fread returned short count.\n") ;
+-			return 0 ;
++			return count ;
+ 			} ;
+ 		psf->headend += count ;
+ 		} ;
+@@ -836,7 +831,6 @@ header_read (SF_PRIVATE *psf, void *ptr, int bytes)
+ static void
+ header_seek (SF_PRIVATE *psf, sf_count_t position, int whence)
+ {
+-
+ 	switch (whence)
+ 	{	case SEEK_SET :
+ 			if (position > SIGNED_SIZEOF (psf->header))
+@@ -885,8 +879,7 @@ header_seek (SF_PRIVATE *psf, sf_count_t position, int whence)
+ 
+ static int
+ header_gets (SF_PRIVATE *psf, char *ptr, int bufsize)
+-{
+-	int		k ;
++{	int		k ;
+ 
+ 	for (k = 0 ; k < bufsize - 1 ; k++)
+ 	{	if (psf->headindex < psf->headend)
+@@ -1073,8 +1066,10 @@ psf_binheader_readf (SF_PRIVATE *psf, char const *format, ...)
+ 			case 'j' :
+ 					/* Get the seek position first. */
+ 					count = va_arg (argptr, size_t) ;
+-					header_seek (psf, count, SEEK_CUR) ;
+-					byte_count += count ;
++					if (count)
++					{	header_seek (psf, count, SEEK_CUR) ;
++						byte_count += count ;
++						} ;
+ 					break ;
+ 
+ 			default :
+-- 
+2.6.3
+

gnu/packages/pulseaudio.scm

@@ -50,7 +50,10 @@ (define libsndfile
                                  version ".tar.gz"))
              (sha256
               (base32
-               "10j8mbb65xkyl0kfy0hpzpmrp0jkr12c7mfycqipxgka6ayns0ar"))))
+               "10j8mbb65xkyl0kfy0hpzpmrp0jkr12c7mfycqipxgka6ayns0ar"))
+             (patches
+              (map search-patch '("libsndfile-CVE-2014-9496.patch"
+                                  "libsndfile-CVE-2015-7805.patch")))))
     (build-system gnu-build-system)
     (inputs
      `(("libvorbis" ,libvorbis)