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Enforce the mtu to between the range 1-65535 before calling the driver

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ioctl routine.
This commit is contained in:
David Greenman 1994-08-08 10:58:30 +00:00
parent a7028af7f0
commit 75ee03cb27
1 changed files with 3 additions and 1 deletions
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4
sys/net/if.c
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@ -31,7 +31,7 @@
* SUCH DAMAGE.
*
* @(#)if.c 8.3 (Berkeley) 1/4/94
* $Id: if.c,v 1.2 1994/08/02 07:46:05 davidg Exp $
* $Id: if.c,v 1.3 1994/08/08 10:49:18 davidg Exp $
*/
#include <sys/param.h>
@ -520,6 +520,8 @@ ifioctl(so, cmd, data, p)
return (error);
if (ifp->if_ioctl == NULL)
return (EOPNOTSUPP);
if (ifr->ifr_mtu < 1 || ifr->ifr_mtu > 65535)
return (EINVAL);
return ((*ifp->if_ioctl)(ifp, cmd, data));
case SIOCADDMULTI: