From: jsg <jsg@openbsd.org>
Date: Tue, 27 Jun 2017 12:10:21 +0000 (+0000)
Subject: Avoid the possibility of accessing an array out of bounds.
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=6a697e54feb66336062598370441c888cc8ca31c;p=openbsd

Avoid the possibility of accessing an array out of bounds.
Found with cppcheck. ok krw@
---

diff --git a/sbin/fsck_msdos/dir.c b/sbin/fsck_msdos/dir.c
index 5ab153d5e3c..7397e574b13 100644
--- a/sbin/fsck_msdos/dir.c
+++ b/sbin/fsck_msdos/dir.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: dir.c,v 1.30 2015/12/10 17:26:59 mmcc Exp $	*/
+/*	$OpenBSD: dir.c,v 1.31 2017/06/27 12:10:21 jsg Exp $	*/
 /*	$NetBSD: dir.c,v 1.11 1997/10/17 11:19:35 ws Exp $	*/
 
 /*
@@ -593,6 +593,8 @@ readDosDirSection(int f, struct bootblock *boot, struct fatEntry *fat,
 			dirent.name[8] = '\0';
 			for (k = 7; k >= 0 && dirent.name[k] == ' '; k--)
 				dirent.name[k] = '\0';
+			if (k < 0)
+				k = 0;
 			if (dirent.name[k] != '\0')
 				k++;
 			if (dirent.name[0] == SLOT_E5)