From df78be05daf4eb07f60f50ec1080cb979af32ec0 Mon Sep 17 00:00:00 2001
From: marxin <marxin@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Tue, 23 Jul 2019 07:33:32 +0000
Subject: [PATCH] libiberty: Check zero value shstrndx in simple-object-elf.c

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@273718 138bc75d-0d04-0410-961f-82ee72b054a4

CVE: CVE-2019-14250
Upstream-Status: Backport [from gcc: https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=273718]
[Removed Changelog entry]
Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>
---
diff --git a/libiberty/simple-object-elf.c b/libiberty/simple-object-elf.c
index 502388991a08..bdee963634d6 100644
--- a/libiberty/simple-object-elf.c
+++ b/libiberty/simple-object-elf.c
@@ -548,7 +548,15 @@ simple_object_elf_match (unsigned char header[SIMPLE_OBJECT_MATCH_HEADER_LEN],
       XDELETE (eor);
       return NULL;
     }
-
+  
+  if (eor->shstrndx == 0)
+    {
+      *errmsg = "invalid ELF shstrndx == 0";
+      *err = 0;
+      XDELETE (eor);
+      return NULL;
+    }
+  
   return (void *) eor;
 }