binutils: CVE-2017-7302

Source: git://sourceware.org/git/binutils-gdb.git
MR: 74218
Type: Security Fix
Disposition: Backport from binutils-2_28-branch
ChangeID: 11677f4fb24c7a49efc23ea7d54de1bf85e74b12
Description:

  Fix seg-fault running strip on a corrupt binary.

        PR binutils/20921
        * aoutx.h (squirt_out_relocs): Check for and report any relocs
        that could not be recognised.

Affects: <= 2.28

Author: Nick Clifton <nickc@redhat.com>
Signed-off-by: Thiruvadi Rajaraman <trajaraman@mvista.com>
Reviewed-by: Armin Kuster <akuster@mvista.com>
Signed-off-by: Armin Kuster <akuster@mvista.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>

2 files changed, 82 insertions, 0 deletions

diff --git a/meta/recipes-devtools/binutils/binutils-2.27.inc b/meta/recipes-devtools/binutils/binutils-2.27.inc
index 59e46b8bf4..936cdc3c98 100644
--- a/meta/recipes-devtools/binutils/binutils-2.27.inc
+++ b/meta/recipes-devtools/binutils/binutils-2.27.inc
@@ -64,6 +64,7 @@ SRC_URI = "\
      file://CVE-2017-7225.patch \
      file://CVE-2017-7227.patch \
      file://CVE-2017-7301.patch \
+     file://CVE-2017-7302.patch \
 "
 S  = "${WORKDIR}/git"
 
diff --git a/meta/recipes-devtools/binutils/binutils/CVE-2017-7302.patch b/meta/recipes-devtools/binutils/binutils/CVE-2017-7302.patch
new file mode 100644
index 0000000000..a45de0e0ab
--- /dev/null
+++ b/meta/recipes-devtools/binutils/binutils/CVE-2017-7302.patch
@@ -0,0 +1,81 @@
+commit e2996cc315d6ea242e1a954dc20246485ccc8512
+Author: Nick Clifton <nickc@redhat.com>
+Date:   Mon Dec 5 14:32:30 2016 +0000
+
+    Fix seg-fault running strip on a corrupt binary.
+    
+        PR binutils/20921
+        * aoutx.h (squirt_out_relocs): Check for and report any relocs
+        that could not be recognised.
+
+Upstream-Status: Backport
+
+CVE: CVE-2017-7302
+Signed-off-by: Thiruvadi Rajaraman <trajaraman@mvista.com>
+
+Index: git/bfd/ChangeLog
+===================================================================
+--- git.orig/bfd/ChangeLog	2017-09-04 15:57:38.564419146 +0530
++++ git/bfd/ChangeLog	2017-09-04 16:02:31.994883900 +0530
+@@ -124,6 +124,10 @@
+        (aout_link_add_symbols): Fix off by one error checking for
+        overflow of string offset.
+ 
++       PR binutils/20921
++       * aoutx.h (squirt_out_relocs): Check for and report any relocs
++       that could not be recognised.
++
+ 2016-12-01  Nick Clifton  <nickc@redhat.com>
+ 
+        PR binutils/20891
+Index: git/bfd/aoutx.h
+===================================================================
+--- git.orig/bfd/aoutx.h	2017-09-04 15:57:38.564419146 +0530
++++ git/bfd/aoutx.h	2017-09-04 16:01:08.830188291 +0530
+@@ -1952,6 +1952,7 @@
+ 
+   PUT_WORD (abfd, g->address, natptr->r_address);
+ 
++  BFD_ASSERT (g->howto != NULL);
+   r_length = g->howto->size ;	/* Size as a power of two.  */
+   r_pcrel  = (int) g->howto->pc_relative; /* Relative to PC?  */
+   /* XXX This relies on relocs coming from a.out files.  */
+@@ -2390,16 +2391,34 @@
+       for (natptr = native;
+ 	   count != 0;
+ 	   --count, natptr += each_size, ++generic)
+-	MY_swap_ext_reloc_out (abfd, *generic,
+-			       (struct reloc_ext_external *) natptr);
++	{
++	  if ((*generic)->howto == NULL)
++	    {
++	      bfd_set_error (bfd_error_invalid_operation);
++	      _bfd_error_handler (_("%B: attempt to write out unknown reloc type"), abfd);
++	      return FALSE;
++	    }
++	  MY_swap_ext_reloc_out (abfd, *generic,
++				 (struct reloc_ext_external *) natptr);
++	}
+     }
+   else
+     {
+       for (natptr = native;
+ 	   count != 0;
+ 	   --count, natptr += each_size, ++generic)
+-	MY_swap_std_reloc_out (abfd, *generic,
+-			       (struct reloc_std_external *) natptr);
++	{
++	  /* PR 20921: If the howto field has not been initialised then skip
++	     this reloc.  */
++	  if ((*generic)->howto == NULL)
++	    {
++	      bfd_set_error (bfd_error_invalid_operation);
++	      _bfd_error_handler (_("%B: attempt to write out unknown reloc type"), abfd);
++	      return FALSE;
++	    }
++	  MY_swap_std_reloc_out (abfd, *generic,
++				 (struct reloc_std_external *) natptr);
++	}
+     }
+ 
+   if (bfd_bwrite ((void *) native, natsize, abfd) != natsize)