* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
+#include "qemu/osdep.h"
#include "qemu-common.h"
#include "net/checksum.h"
int hlen, plen, proto, csum_offset;
uint16_t csum;
+ /* Ensure data has complete L2 & L3 headers. */
+ if (length < 14 + 20) {
+ return;
+ }
+
if ((data[14] & 0xf0) != 0x40)
return; /* not IPv4 */
hlen = (data[14] & 0x0f) * 4;
return;
}
- if (plen < csum_offset+2)
- return;
+ if (plen < csum_offset + 2 || 14 + hlen + plen > length) {
+ return;
+ }
data[14+hlen+csum_offset] = 0;
data[14+hlen+csum_offset+1] = 0;