ixgb: don't allow too small MTU (a65a604a) · Commits · 戴 / test

drivers/net/ixgb/ixgb_main.c

+3 −3

Original line number	Diff line number	Diff line
		@@ -1566,9 +1566,9 @@ ixgb_change_mtu(struct net_device *netdev, int new_mtu)
		int max_frame = new_mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
		int old_max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;


		if((max_frame < IXGB_MIN_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH)
		\|\| (max_frame > IXGB_MAX_JUMBO_FRAME_SIZE + ENET_FCS_LENGTH)) {
		/* MTU < 68 is an error for IPv4 traffic, just don't allow it */
		if ((new_mtu < 68) \|\|
		(max_frame > IXGB_MAX_JUMBO_FRAME_SIZE + ENET_FCS_LENGTH)) {
		DPRINTK(PROBE, ERR, "Invalid MTU setting %d\n", new_mtu);
		return -EINVAL;
		}