Prevent an illegal memory access in readelf when attempting to parse a corrupt ELF...

	PR 22510
	* readelf.c (load_debug_section): Fail if there are no section
	headers available.

diff --git a/binutils/ChangeLog b/binutils/ChangeLog
index bacb762..1ea16e4 100644 (file)
--- a/binutils/ChangeLog
+++ b/binutils/ChangeLog
@@ -1,3 +1,9 @@
+2017-11-30  Nick Clifton  <nickc@redhat.com>
+
+       PR 22510
+       * readelf.c (load_debug_section): Fail if there are no section
+       headers available.
+
 2017-11-29  Nick Clifton  <nickc@redhat.com>
 
        PR 22508

diff --git a/binutils/readelf.c b/binutils/readelf.c
index a1f43e6..e0230c7 100644 (file)
--- a/binutils/readelf.c
+++ b/binutils/readelf.c
@@ -13574,6 +13574,10 @@ load_debug_section (enum dwarf_section_display_enum debug, void * data)
   Elf_Internal_Shdr * sec;
   Filedata * filedata = (Filedata *) data;
 
+  /* Without section headers we cannot find any sections.  */
+  if (filedata->section_headers == NULL)
+    return FALSE;
+
   if (filedata->string_table == NULL)
     {
       Elf_Internal_Shdr * strs;