From: Nick Clifton <nickc@redhat.com>
Date: Mon, 5 Dec 2022 11:11:44 +0000 (+0000)
Subject: Fix an illegal memory access when parsing a corrupt VMS Alpha file.
X-Git-Tag: gdb-13-branchpoint~160
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=942fa4fb32738ecbb447546d54f1e5f0312d2ed4;p=thirdparty%2Fbinutils-gdb.git

Fix an illegal memory access when parsing a corrupt VMS Alpha file.

	PR 29848
	* vms-alpha.c (parse_module): Fix potential out of bounds memory
	access.
---

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index eee5d42d6bb..ee8eaf01d42 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,9 @@
+2022-12-05  Nick Clifton  <nickc@redhat.com>
+
+	PR 29848
+	* vms-alpha.c (parse_module): Fix potential out of bounds memory
+	access.
+
 2022-12-01  Nick Clifton  <nickc@redhat.com>
 
 	PR 25202
diff --git a/bfd/vms-alpha.c b/bfd/vms-alpha.c
index 9531953bb6d..c0eb5bc5a2a 100644
--- a/bfd/vms-alpha.c
+++ b/bfd/vms-alpha.c
@@ -4366,7 +4366,7 @@ parse_module (bfd *abfd, struct module *module, unsigned char *ptr,
     return false;
   module->line_table = curr_line;
 
-  while (length == -1 || ptr < maxptr)
+  while (length == -1 || (ptr + 3) < maxptr)
     {
       /* The first byte is not counted in the recorded length.  */
       int rec_length = bfd_getl16 (ptr) + 1;