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fix range check for mmap

This commit is contained in:
jmcneill 2012-01-02 00:20:30 +00:00
parent 952b88962c
commit 31469ba145
1 changed files with 3 additions and 3 deletions
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6
sys/arch/usermode/dev/vncfb.c
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@ -1,4 +1,4 @@
/* $NetBSD: vncfb.c,v 1.10 2011/12/30 20:08:36 jmcneill Exp $ */
/* $NetBSD: vncfb.c,v 1.11 2012/01/02 00:20:30 jmcneill Exp $ */
/*-
* Copyright (c) 2011 Jared D. McNeill <jmcneill@invisible.ca>
@ -35,7 +35,7 @@
#include "opt_wsemul.h"
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: vncfb.c,v 1.10 2011/12/30 20:08:36 jmcneill Exp $");
__KERNEL_RCSID(0, "$NetBSD: vncfb.c,v 1.11 2012/01/02 00:20:30 jmcneill Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -507,7 +507,7 @@ vncfb_mmap(void *v, void *vs, off_t offset, int prot)
paddr_t pa;
vaddr_t va;
if (offset < 0 || offset + PAGE_SIZE > sc->sc_framebufsize) {
if (offset < 0 || offset >= sc->sc_framebufsize) {
device_printf(sc->sc_dev, "mmap: offset 0x%x, fbsize 0x%x"
" out of range!\n",
(unsigned int)offset, (unsigned int)sc->sc_framebufsize);