Fix a illegal memory access fault when parsing a corrupt MIPS option section using...

	PR 24243
	* readelf.c (process_mips_specific): Check for an options section
	that is too small to even contain a single option.

diff --git a/binutils/ChangeLog b/binutils/ChangeLog
index 1ae5044..1d55610 100644 (file)
--- a/binutils/ChangeLog
+++ b/binutils/ChangeLog
@@ -2,6 +2,9 @@
 
        PR 24242
        * readelf.c (print_ia64_vms_note): Harden against corrupt notes.
+       PR 24243
+       * readelf.c (process_mips_specific): Check for an options section
+       that is too small to even contain a single option.
 
 2019-02-20  Alan Modra  <amodra@gmail.com>
 

diff --git a/binutils/readelf.c b/binutils/readelf.c
index 54d165e..20ebacc 100644 (file)
--- a/binutils/readelf.c
+++ b/binutils/readelf.c
@@ -16187,6 +16187,12 @@ process_mips_specific (Filedata * filedata)
          error (_("No MIPS_OPTIONS header found\n"));
          return FALSE;
        }
+      /* PR 24243  */
+      if (sect->sh_size < sizeof (* eopt))
+       {
+         error (_("The MIPS options section is too small.\n"));
+         return FALSE;
+       }
 
       eopt = (Elf_External_Options *) get_data (NULL, filedata, options_offset, 1,
                                                 sect->sh_size, _("options"));