binutls: Security fix for CVE-2017-16831

Affects: <= 2.29.1

(From OE-Core rev: ab9e8161a3b89914d8664175a684675bc99d6f21)

Signed-off-by: Armin Kuster <akuster@mvista.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 78 insertions, 0 deletions

diff --git a/meta/recipes-devtools/binutils/binutils-2.29.1.inc b/meta/recipes-devtools/binutils/binutils-2.29.1.inc
index 4191482929..d5db6e8da4 100644
--- a/meta/recipes-devtools/binutils/binutils-2.29.1.inc
+++ b/meta/recipes-devtools/binutils/binutils-2.29.1.inc
@@ -58,6 +58,7 @@ SRC_URI = "\
      file://CVE-2017-16828_p2.patch \
      file://CVE-2017-16829.patch \
      file://CVE-2017-16830.patch \
+     file://CVE-2017-16831.patch \
 "
 S  = "${WORKDIR}/git"
 
diff --git a/meta/recipes-devtools/binutils/binutils/CVE-2017-16831.patch b/meta/recipes-devtools/binutils/binutils/CVE-2017-16831.patch
new file mode 100644
index 0000000000..7acd5e0f2f
--- /dev/null
+++ b/meta/recipes-devtools/binutils/binutils/CVE-2017-16831.patch
@@ -0,0 +1,77 @@
+From 6cee897971d4d7cd37d2a686bb6d2aa3e759c8ca Mon Sep 17 00:00:00 2001
+From: Nick Clifton <nickc@redhat.com>
+Date: Fri, 3 Nov 2017 11:55:21 +0000
+Subject: [PATCH] Fix excessive memory allocation attempts and possible integer
+ overfloaws when attempting to read a COFF binary with a corrupt symbol count.
+
+        PR 22385
+        * coffgen.c (_bfd_coff_get_external_symbols): Check for an
+        overlarge raw syment count.
+        (coff_get_normalized_symtab): Likewise.
+
+Upstream-Status: Backport
+Affects: <= 2.29.1
+CVE:  CVE-2017-16831
+Signed-off-by: Armin Kuster <akuster@mvista.com>
+
+---
+ bfd/ChangeLog |  8 ++++++++
+ bfd/coffgen.c | 17 +++++++++++++++--
+ 2 files changed, 23 insertions(+), 2 deletions(-)
+
+Index: git/bfd/ChangeLog
+===================================================================
+--- git.orig/bfd/ChangeLog
++++ git/bfd/ChangeLog
+@@ -1,3 +1,11 @@
++2017-11-03  Mingi Cho  <mgcho.minic@gmail.com>
++           Nick Clifton  <nickc@redhat.com>
++
++       PR 22385
++       * coffgen.c (_bfd_coff_get_external_symbols): Check for an
++       overlarge raw syment count.
++       (coff_get_normalized_symtab): Likewise.
++
+ 2017-10-17  Alan Modra  <amodra@gmail.com>
+  
+        PR 22307
+Index: git/bfd/coffgen.c
+===================================================================
+--- git.orig/bfd/coffgen.c
++++ git/bfd/coffgen.c
+@@ -1640,13 +1640,23 @@ _bfd_coff_get_external_symbols (bfd *abf
+   size = obj_raw_syment_count (abfd) * symesz;
+   if (size == 0)
+     return TRUE;
++   /* Check for integer overflow and for unreasonable symbol counts.  */
++   if (size < obj_raw_syment_count (abfd)
++       || (bfd_get_file_size (abfd) > 0
++          && size > bfd_get_file_size (abfd)))
++
++     {
++       _bfd_error_handler (_("%B: corrupt symbol count: %#Lx"),
++                         abfd, obj_raw_syment_count (abfd));
++       return FALSE;
++    }
+ 
+   syms = bfd_malloc (size);
+   if (syms == NULL)
+     {
+       /* PR 21013: Provide an error message when the alloc fails.  */
+-      _bfd_error_handler (_("%B: Not enough memory to allocate space for %lu symbols"),
+-                         abfd, size);
++      _bfd_error_handler (_("%B: not enough memory to allocate space for %#Lx symbols of size %#Lx"),
++                         abfd, obj_raw_syment_count (abfd), symesz);
+       return FALSE;
+     }
+ 
+@@ -1790,6 +1800,9 @@ coff_get_normalized_symtab (bfd *abfd)
+     return NULL;
+ 
+   size = obj_raw_syment_count (abfd) * sizeof (combined_entry_type);
++  /* Check for integer overflow.  */
++  if (size < obj_raw_syment_count (abfd))
++    return NULL;
+   internal = (combined_entry_type *) bfd_zalloc (abfd, size);
+   if (internal == NULL && size != 0)
+     return NULL;