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Fixed two security holes in the pcmmap() function.

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Submitted by:	Bruce Evans
This commit is contained in:
David Greenman 1994-12-27 08:43:06 +00:00
parent 04dc4fc21c
commit 2048dd682c
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=5240
3 changed files with 9 additions and 9 deletions
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6
sys/dev/syscons/syscons.c
View file

@ -35,7 +35,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: syscons.c,v 1.83 1994/12/18 19:45:53 joerg Exp $
* $Id: syscons.c,v 1.84 1994/12/26 17:50:18 ats Exp $
*/
#include "sc.h"
@ -2635,8 +2635,8 @@ getchar(void)
int
pcmmap(dev_t dev, int offset, int nprot)
{
if (offset > 0x20000)
return EINVAL;
if (offset > 0x20000 - PAGE_SIZE)
return -1;
return i386_btop((VIDEOMEM + offset));
}

6
sys/i386/isa/syscons.c
View file

@ -35,7 +35,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: syscons.c,v 1.83 1994/12/18 19:45:53 joerg Exp $
* $Id: syscons.c,v 1.84 1994/12/26 17:50:18 ats Exp $
*/
#include "sc.h"
@ -2635,8 +2635,8 @@ getchar(void)
int
pcmmap(dev_t dev, int offset, int nprot)
{
if (offset > 0x20000)
return EINVAL;
if (offset > 0x20000 - PAGE_SIZE)
return -1;
return i386_btop((VIDEOMEM + offset));
}

6
sys/isa/syscons.c
View file

@ -35,7 +35,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: syscons.c,v 1.83 1994/12/18 19:45:53 joerg Exp $
* $Id: syscons.c,v 1.84 1994/12/26 17:50:18 ats Exp $
*/
#include "sc.h"
@ -2635,8 +2635,8 @@ getchar(void)
int
pcmmap(dev_t dev, int offset, int nprot)
{
if (offset > 0x20000)
return EINVAL;
if (offset > 0x20000 - PAGE_SIZE)
return -1;
return i386_btop((VIDEOMEM + offset));
}