From ac4af583bd59f6631671ad4abf985799ce4a53d9 Mon Sep 17 00:00:00 2001
From: rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Thu, 25 Jul 2019 10:46:54 +0000
Subject: [PATCH 37/39] CVE-2019-14250: Check zero value in
 simple_object_elf_match

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-9-branch@273793 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 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/libiberty/simple-object-elf.c b/libiberty/simple-object-elf.c
index 3d49f339631..c00cebdb6c7 100644
--- a/libiberty/simple-object-elf.c
+++ b/libiberty/simple-object-elf.c
@@ -557,6 +557,14 @@ simple_object_elf_match (unsigned char header[SIMPLE_OBJECT_MATCH_HEADER_LEN],
       return NULL;
     }
 
+  if (eor->shstrndx == 0)
+    {
+      *errmsg = "invalid ELF shstrndx == 0";
+      *err = 0;
+      XDELETE (eor);
+      return NULL;
+    }
+
   return (void *) eor;
 }
 
-- 
2.25.1