diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index 2a7fb517d460..77799e7d5a34 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -3343,10 +3343,14 @@ static int l2cap_parse_conf_req(struct l2cap_chan *chan, void *data, size_t data
 
 		switch (type) {
 		case L2CAP_CONF_MTU:
+			if (olen != 2)
+				break;
 			mtu = val;
 			break;
 
 		case L2CAP_CONF_FLUSH_TO:
+			if (olen != 2)
+				break;
 			chan->flush_to = val;
 			break;
 
@@ -3354,26 +3358,30 @@ static int l2cap_parse_conf_req(struct l2cap_chan *chan, void *data, size_t data
 			break;
 
 		case L2CAP_CONF_RFC:
-			if (olen == sizeof(rfc))
-				memcpy(&rfc, (void *) val, olen);
+			if (olen != sizeof(rfc))
+				break;
+			memcpy(&rfc, (void *) val, olen);
 			break;
 
 		case L2CAP_CONF_FCS:
+			if (olen != 1)
+				break;
 			if (val == L2CAP_FCS_NONE)
 				set_bit(CONF_RECV_NO_FCS, &chan->conf_state);
 			break;
 
 		case L2CAP_CONF_EFS:
-			if (olen == sizeof(efs)) {
-				remote_efs = 1;
-				memcpy(&efs, (void *) val, olen);
-			}
+			if (olen != sizeof(efs))
+				break;
+			remote_efs = 1;
+			memcpy(&efs, (void *) val, olen);
 			break;
 
 		case L2CAP_CONF_EWS:
+			if (olen != 2)
+				break;
 			if (!(chan->conn->local_fixed_chan & L2CAP_FC_A2MP))
 				return -ECONNREFUSED;
-
 			set_bit(FLAG_EXT_CTRL, &chan->flags);
 			set_bit(CONF_EWS_RECV, &chan->conf_state);
 			chan->tx_win_max = L2CAP_DEFAULT_EXT_WINDOW;
@@ -3383,7 +3391,6 @@ static int l2cap_parse_conf_req(struct l2cap_chan *chan, void *data, size_t data
 		default:
 			if (hint)
 				break;
-
 			result = L2CAP_CONF_UNKNOWN;
 			*((u8 *) ptr++) = type;
 			break;
@@ -3551,55 +3558,60 @@ static int l2cap_parse_conf_rsp(struct l2cap_chan *chan, void *rsp, int len,
 
 		switch (type) {
 		case L2CAP_CONF_MTU:
+			if (olen != 2)
+				break;
 			if (val < L2CAP_DEFAULT_MIN_MTU) {
 				*result = L2CAP_CONF_UNACCEPT;
 				chan->imtu = L2CAP_DEFAULT_MIN_MTU;
 			} else
 				chan->imtu = val;
-			l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->imtu, endptr - ptr);
+			l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->imtu,
+					   endptr - ptr);
 			break;
 
 		case L2CAP_CONF_FLUSH_TO:
+			if (olen != 2)
+				break;
 			chan->flush_to = val;
-			l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO,
-					   2, chan->flush_to, endptr - ptr);
+			l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, 2,
+					   chan->flush_to, endptr - ptr);
 			break;
 
 		case L2CAP_CONF_RFC:
-			if (olen == sizeof(rfc))
-				memcpy(&rfc, (void *)val, olen);
-
+			if (olen != sizeof(rfc))
+				break;
+			memcpy(&rfc, (void *)val, olen);
 			if (test_bit(CONF_STATE2_DEVICE, &chan->conf_state) &&
 			    rfc.mode != chan->mode)
 				return -ECONNREFUSED;
-
 			chan->fcs = 0;
-
-			l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC,
-					   sizeof(rfc), (unsigned long) &rfc, endptr - ptr);
+			l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc),
+					   (unsigned long) &rfc, endptr - ptr);
 			break;
 
 		case L2CAP_CONF_EWS:
+			if (olen != 2)
+				break;
 			chan->ack_win = min_t(u16, val, chan->ack_win);
 			l2cap_add_conf_opt(&ptr, L2CAP_CONF_EWS, 2,
 					   chan->tx_win, endptr - ptr);
 			break;
 
 		case L2CAP_CONF_EFS:
-			if (olen == sizeof(efs)) {
-				memcpy(&efs, (void *)val, olen);
-
-				if (chan->local_stype != L2CAP_SERV_NOTRAFIC &&
-				    efs.stype != L2CAP_SERV_NOTRAFIC &&
-				    efs.stype != chan->local_stype)
-					return -ECONNREFUSED;
-
-				l2cap_add_conf_opt(&ptr, L2CAP_CONF_EFS, sizeof(efs),
-						   (unsigned long) &efs, endptr - ptr);
-			}
+			if (olen != sizeof(efs))
+				break;
+			memcpy(&efs, (void *)val, olen);
+			if (chan->local_stype != L2CAP_SERV_NOTRAFIC &&
+			    efs.stype != L2CAP_SERV_NOTRAFIC &&
+			    efs.stype != chan->local_stype)
+				return -ECONNREFUSED;
+			l2cap_add_conf_opt(&ptr, L2CAP_CONF_EFS, sizeof(efs),
+					   (unsigned long) &efs, endptr - ptr);
 			break;
 
 		case L2CAP_CONF_FCS:
+			if (olen != 1)
+				break;
 			if (*result == L2CAP_CONF_PENDING)
 				if (val == L2CAP_FCS_NONE)
 					set_bit(CONF_RECV_NO_FCS,
@@ -3731,10 +3743,13 @@ static void l2cap_conf_rfc_get(struct l2cap_chan *chan, void *rsp, int len)
 
 		switch (type) {
 		case L2CAP_CONF_RFC:
-			if (olen == sizeof(rfc))
-				memcpy(&rfc, (void *)val, olen);
+			if (olen != sizeof(rfc))
+				break;
+			memcpy(&rfc, (void *)val, olen);
 			break;
 		case L2CAP_CONF_EWS:
+			if (olen != 2)
+				break;
 			txwin_ext = val;
 			break;
 		}