From a4f1b58eb48b349a5f353bc69c30be553506d33b Mon Sep 17 00:00:00 2001
From: rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Thu, 25 Jul 2019 10:48:26 +0000
Subject: [PATCH] 2019-07-25  Richard Biener  <rguenther@suse.de>

	PR lto/90924
	Backport from mainline
	2019-07-12  Ren Kimura  <rkx1209dev@gmail.com>

	* simple-object-elf.c (simple_object_elf_match): Check zero value
	shstrndx.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-8-branch@273794 138bc75d-0d04-0410-961f-82ee72b054a4

Upstream-Status: Backport
Affectes: <  9.2
CVE: CVE-2019-14250
Dropped changelog
Signed-off-by: Armin Kuster <Akustre@mvista.com>

---
 libiberty/simple-object-elf.c | 8 ++++++++
 2 files changed, 17 insertions(+)

Index: gcc-8.2.0/libiberty/simple-object-elf.c
===================================================================
--- gcc-8.2.0.orig/libiberty/simple-object-elf.c
+++ gcc-8.2.0/libiberty/simple-object-elf.c
@@ -549,6 +549,14 @@ simple_object_elf_match (unsigned char h
       return NULL;
     }
 
+  if (eor->shstrndx == 0)
+    {
+      *errmsg = "invalid ELF shstrndx == 0";
+      *err = 0;
+      XDELETE (eor);
+      return NULL;
+    }
+
   return (void *) eor;
 }