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authorDon Dugger <n0ano@n0ano.com>2016-06-03 03:33:22 +0000
committerGerrit Code Review <gerrit@172.30.200.206>2016-06-03 03:33:23 +0000
commitda27230f80795d0028333713f036d44c53cb0e68 (patch)
treeb3d379eaf000adf72b36cb01cdf4d79c3e3f064c /qemu/net/checksum.c
parent0e68cb048bb8aadb14675f5d4286d8ab2fc35449 (diff)
parent437fd90c0250dee670290f9b714253671a990160 (diff)
Merge "These changes are the raw update to qemu-2.6."
Diffstat (limited to 'qemu/net/checksum.c')
-rw-r--r--qemu/net/checksum.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/qemu/net/checksum.c b/qemu/net/checksum.c
index 14c08550e..d0fa424cc 100644
--- a/qemu/net/checksum.c
+++ b/qemu/net/checksum.c
@@ -15,6 +15,7 @@
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
+#include "qemu/osdep.h"
#include "qemu-common.h"
#include "net/checksum.h"
@@ -59,6 +60,11 @@ void net_checksum_calculate(uint8_t *data, int length)
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;
@@ -76,8 +82,9 @@ void net_checksum_calculate(uint8_t *data, int length)
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;