From: Nick Clifton <nickc@redhat.com>
Date: Fri, 30 Apr 2021 13:31:03 +0000 (+0100)
Subject: Fix illegal memory access parsing a corrupt MACH-O format file.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=d1fbc3ba09fb2e79acf633df29ccbe9285624419;p=binutils-gdb.git

Fix illegal memory access parsing a corrupt MACH-O format file.

	PR 27801
	* mach-o.c (bfd_mach_o_core_fetch_environment): Use bfd_get_32 to
	read 32-bit value.
---

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index cd9b1b38607..c5a617cef97 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,9 @@
+2021-04-30  Nick Clifton  <nickc@redhat.com>
+
+	PR 27801
+	* mach-o.c (bfd_mach_o_core_fetch_environment): Use bfd_get_32 to
+	read 32-bit value.
+
 2021-04-30  Nick Clifton  <nickc@redhat.com>
 
 	PR 27799
diff --git a/bfd/mach-o.c b/bfd/mach-o.c
index 60121c4ef47..ff18ded23d5 100644
--- a/bfd/mach-o.c
+++ b/bfd/mach-o.c
@@ -5931,7 +5931,8 @@ bfd_mach_o_core_fetch_environment (bfd *abfd,
 		{
 		  unsigned long val;
 
-		  val = *((unsigned long *) (buf + size - offset));
+		  val = bfd_get_32(abfd, buf + size - offset);
+
 		  if (! found_nonnull)
 		    {
 		      if (val != 0)