Index: sys/dev/usb/wlan/if_upgt.c
===================================================================
--- sys/dev/usb/wlan/if_upgt.c
+++ sys/dev/usb/wlan/if_upgt.c
@@ -118,7 +118,7 @@
 static struct mbuf *
 		upgt_rxeof(struct usb_xfer *, struct upgt_data *, int *);
 static struct mbuf *
-		upgt_rx(struct upgt_softc *, uint8_t *, int, int *);
+		upgt_rx(struct upgt_softc *, uint8_t *, uint16_t, int *);
 static void	upgt_txeof(struct usb_xfer *, struct upgt_data *);
 static int	upgt_eeprom_read(struct upgt_softc *);
 static int	upgt_eeprom_parse(struct upgt_softc *);
@@ -306,7 +306,9 @@
 	DPRINTF(sc, UPGT_DEBUG_FW, "memory address rx start=0x%08x\n",
 	    sc->sc_memaddr_rx_start);
 
-	upgt_mem_init(sc);
+	error = upgt_mem_init(sc);
+	if (error)
+		goto fail4;
 
 	/* Load the firmware.  */
 	error = upgt_fw_load(sc);
@@ -1043,7 +1045,7 @@
 	struct ieee80211com *ic = &sc->sc_ic;
 	struct upgt_eeprom_header *eeprom_header;
 	struct upgt_eeprom_option *eeprom_option;
-	uint16_t option_len;
+	uint32_t option_len;
 	uint16_t option_type;
 	uint16_t preamble_len;
 	int option_end = 0;
@@ -1058,7 +1060,9 @@
 
 		/* sanity check */
 		if (eeprom_option >= (struct upgt_eeprom_option *)
-		    (sc->sc_eeprom + UPGT_EEPROM_SIZE)) {
+		    (sc->sc_eeprom + UPGT_EEPROM_SIZE) ||
+		    eeprom_option < (struct upgt_eeprom_option *)
+		    sc->sc_eeprom) {
 			return (EINVAL);
 		}
 
@@ -1378,13 +1382,22 @@
 		eeprom = (struct upgt_lmac_eeprom *)(data->buf + 4);
 		uint16_t eeprom_offset = le16toh(eeprom->offset);
 		uint16_t eeprom_len = le16toh(eeprom->len);
+		int buf_offset = sizeof(struct upgt_lmac_eeprom) + 4;
 
+		if (eeprom_len > MCLBYTES - buf_offset ||
+		    eeprom_len > sizeof(sc->sc_eeprom) - eeprom_offset) {
+			device_printf(sc->sc_dev,
+			    "%s: wrong eeprom length (%u) / offset (%u)!\n",
+			    __func__, eeprom_len, eeprom_offset);
+			return (NULL);
+		}
+
 		DPRINTF(sc, UPGT_DEBUG_FW,
 		    "received EEPROM block (offset=%d, len=%d)\n",
 		    eeprom_offset, eeprom_len);
 
 		memcpy(sc->sc_eeprom + eeprom_offset,
-		    data->buf + sizeof(struct upgt_lmac_eeprom) + 4,
+		    data->buf + buf_offset,
 		    eeprom_len);
 
 		/* EEPROM data has arrived in time, wakeup.  */
@@ -1433,7 +1446,7 @@
 }
 
 static struct mbuf *
-upgt_rx(struct upgt_softc *sc, uint8_t *data, int pkglen, int *rssi)
+upgt_rx(struct upgt_softc *sc, uint8_t *data, uint16_t pkglen, int *rssi)
 {
 	struct ieee80211com *ic = &sc->sc_ic;
 	struct upgt_lmac_rx_desc *rxdesc;
@@ -1449,9 +1462,14 @@
 	/* access RX packet descriptor */
 	rxdesc = (struct upgt_lmac_rx_desc *)data;
 
+	if (pkglen >= MCLBYTES - ETHER_ALIGN) {
+		device_printf(sc->sc_dev,
+		    "%s: A current mbuf storage is small (%d)\n",
+		    __func__, pkglen + ETHER_ALIGN);
+		return (NULL);
+	}
+
 	/* create mbuf which is suitable for strict alignment archs */
-	KASSERT((pkglen + ETHER_ALIGN) < MCLBYTES,
-	    ("A current mbuf storage is small (%d)", pkglen + ETHER_ALIGN));
 	m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
 	if (m == NULL) {
 		device_printf(sc->sc_dev, "could not create RX mbuf\n");
@@ -1701,6 +1719,15 @@
 {
 	int i;
 
+	if ((uint64_t)(sc->sc_memaddr_frame_start + MCLBYTES) >
+	    sc->sc_memaddr_frame_end) {
+		device_printf(sc->sc_dev,
+		    "%s: start (%u) + MCLBYTES > end (%u)!\n",
+		    __func__, sc->sc_memaddr_frame_start,
+		    sc->sc_memaddr_frame_end);
+		return (EINVAL);
+	}
+
 	for (i = 0; i < UPGT_MEMORY_MAX_PAGES; i++) {
 		sc->sc_memory.page[i].used = 0;
 
@@ -1716,6 +1743,14 @@
 			    sc->sc_memory.page[i - 1].addr + MCLBYTES;
 		}
 
+		/* Memory wrap check. */
+		if (sc->sc_memaddr_frame_start > sc->sc_memory.page[i].addr) {
+			device_printf(sc->sc_dev,
+			    "%s: frame_start (%u) is too large!\n",
+			    __func__, sc->sc_memaddr_frame_start);
+			return (EINVAL);
+		}
+
 		if (sc->sc_memory.page[i].addr + MCLBYTES >=
 		    sc->sc_memaddr_frame_end)
 			break;
@@ -1753,17 +1788,19 @@
 	/*
 	 * Seek to beginning of Boot Record Area (BRA).
 	 */
-	for (offset = 0; offset < fw->datasize; offset += sizeof(*uc)) {
+	for (offset = 0;
+	     offset + sizeof(*uc) <= fw->datasize;
+	     offset += sizeof(*uc)) {
 		uc = (const uint32_t *)((const uint8_t *)fw->data + offset);
 		if (*uc == 0)
 			break;
 	}
-	for (; offset < fw->datasize; offset += sizeof(*uc)) {
+	for (; offset + sizeof(*uc) <= fw->datasize; offset += sizeof(*uc)) {
 		uc = (const uint32_t *)((const uint8_t *)fw->data + offset);
 		if (*uc != 0)
 			break;
 	}
-	if (offset == fw->datasize) { 
+	if (offset + sizeof(*uc) > fw->datasize) { 
 		device_printf(sc->sc_dev,
 		    "firmware Boot Record Area not found\n");
 		error = EIO;
@@ -1776,13 +1813,21 @@
 	/*
 	 * Parse Boot Record Area (BRA) options.
 	 */
-	while (offset < fw->datasize && bra_end == 0) {
+	while (offset <= fw->datasize - sizeof(*bra_opt) && bra_end == 0) {
 		/* get current BRA option */
 		p = (const uint8_t *)fw->data + offset;
 		bra_opt = (const struct upgt_fw_bra_option *)p;
 		bra_option_type = le32toh(bra_opt->type);
 		bra_option_len = le32toh(bra_opt->len) * sizeof(*uc);
 
+		if (bra_option_len > (size_t)(fw->datasize - offset -
+		    sizeof(*bra_opt)) ||
+		    bra_option_len / sizeof(*uc) != le32toh(bra_opt->len)) {
+			device_printf(sc->sc_dev, "bra_option_len overflow\n");
+			error = EINVAL;
+			goto fail;
+		}
+
 		switch (bra_option_type) {
 		case UPGT_BRA_TYPE_FW:
 			DPRINTF(sc, UPGT_DEBUG_FW, "UPGT_BRA_TYPE_FW len=%d\n",
@@ -1821,6 +1866,18 @@
 			    "UPGT_BRA_TYPE_EXPIF len=%d\n", bra_option_len);
 			break;
 		case UPGT_BRA_TYPE_DESCR:
+			if (sizeof(*descr) > fw->datasize - offset -
+			    sizeof(*bra_opt) ||
+			    sizeof(*descr) > bra_option_len) {
+				device_printf(sc->sc_dev, "%s: no place for"
+				    "'struct upgt_fw_bra_descr' (%zu / %u)\n",
+				    __func__,
+				    fw->datasize - offset - sizeof(*bra_opt),
+				    bra_option_len);
+				error = EIO;
+				goto fail;
+			}
+
 			DPRINTF(sc, UPGT_DEBUG_FW,
 			    "UPGT_BRA_TYPE_DESCR len=%d\n", bra_option_len);
 
@@ -2111,14 +2168,28 @@
     struct upgt_data *data)
 {
 	struct ieee80211vap *vap = ni->ni_vap;
-	int error = 0, len;
+	int error = 0;
 	struct ieee80211_frame *wh;
 	struct ieee80211_key *k;
 	struct upgt_lmac_mem *mem;
 	struct upgt_lmac_tx_desc *txdesc;
+	uint32_t len;
 
 	UPGT_ASSERT_LOCKED(sc);
 
+	/* Calculate frame size. */
+        len = sizeof(*mem) + sizeof(*txdesc) + m->m_pkthdr.len;
+	/* We need to align the frame to a 4 byte boundary. */
+	len = (len + 3) & ~3;
+
+	if (len > MCLBYTES) {
+		device_printf(sc->sc_dev,
+		    "%s: the frame %p is too big (%d)\n",
+		    __func__, m, m->m_pkthdr.len);
+		error = EINVAL;
+		goto done;
+	}
+
 	upgt_set_led(sc, UPGT_LED_BLINK);
 
 	/*
@@ -2175,19 +2246,14 @@
 	/* copy frame below our TX descriptor header */
 	m_copydata(m, 0, m->m_pkthdr.len,
 	    data->buf + (sizeof(*mem) + sizeof(*txdesc)));
-	/* calculate frame size */
-	len = sizeof(*mem) + sizeof(*txdesc) + m->m_pkthdr.len;
-	/* we need to align the frame to a 4 byte boundary */
-	len = (len + 3) & ~3;
 	/* calculate frame checksum */
 	mem->chksum = upgt_chksum_le((uint32_t *)txdesc, len - sizeof(*mem));
 	data->ni = ni;
 	data->m = m;
 	data->buflen = len;
 
-	DPRINTF(sc, UPGT_DEBUG_XMIT, "%s: TX start data sending (%d bytes)\n",
+	DPRINTF(sc, UPGT_DEBUG_XMIT, "%s: TX start data sending (%u bytes)\n",
 	    __func__, len);
-	KASSERT(len <= MCLBYTES, ("mbuf is small for saving data"));
 
 	upgt_bulk_tx(sc, data);
 done: