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Fix buffer overflow. It seems that some people need to go back to the
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basics of C programming.

Reported-by: syzbot+8665827f389a9fac5cc9@syzkaller.appspotmail.com
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maxv authored and maxv committed Jun 25, 2019
1 parent b74dd01 commit c958d6f
Showing 1 changed file with 3 additions and 3 deletions.
6 changes: 3 additions & 3 deletions sys/kern/kern_exec.c
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
/* $NetBSD: kern_exec.c,v 1.468 2019/06/18 23:53:55 kamil Exp $ */
/* $NetBSD: kern_exec.c,v 1.469 2019/06/25 16:58:02 maxv Exp $ */

/*-
* Copyright (c) 2008 The NetBSD Foundation, Inc.
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*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: kern_exec.c,v 1.468 2019/06/18 23:53:55 kamil Exp $");
__KERNEL_RCSID(0, "$NetBSD: kern_exec.c,v 1.469 2019/06/25 16:58:02 maxv Exp $");

#include "opt_exec.h"
#include "opt_execfmt.h"
Expand Down Expand Up @@ -656,7 +656,7 @@ exec_makepathbuf(struct lwp *l, const char *upath, enum uio_seg seg,
tlen = path + MAXPATHLEN - bp;

memmove(path, bp, tlen);
path[tlen] = '\0';
path[tlen-1] = '\0';
if (offs)
*offs = tlen - len;
out:
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