disable FB

hc

2024-01-04 1543e317f1da31b75942316931e8f491a8920811

 kernel/drivers/net/wireless/marvell/mwifiex/sta_rx.c
..
..
@@ -98,12 +98,23 @@
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98
 	rx_pkt_len = le16_to_cpu(local_rx_pd->rx_pkt_length);
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 	rx_pkt_hdr = (void *)local_rx_pd + rx_pkt_off;
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100
 
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-	if ((!memcmp(&rx_pkt_hdr->rfc1042_hdr, bridge_tunnel_header,
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-		     sizeof(bridge_tunnel_header))) ||
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-	    (!memcmp(&rx_pkt_hdr->rfc1042_hdr, rfc1042_header,
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-		     sizeof(rfc1042_header)) &&
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-	     ntohs(rx_pkt_hdr->rfc1042_hdr.snap_type) != ETH_P_AARP &&
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-	     ntohs(rx_pkt_hdr->rfc1042_hdr.snap_type) != ETH_P_IPX)) {
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+	if (sizeof(rx_pkt_hdr->eth803_hdr) + sizeof(rfc1042_header) +
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+	    rx_pkt_off > skb->len) {
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+		mwifiex_dbg(priv->adapter, ERROR,
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+			    "wrong rx packet offset: len=%d, rx_pkt_off=%d\n",
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+			    skb->len, rx_pkt_off);
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+		priv->stats.rx_dropped++;
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+		dev_kfree_skb_any(skb);
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+		return -1;
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+	}
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+
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+	if (sizeof(*rx_pkt_hdr) + rx_pkt_off <= skb->len &&
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+	    ((!memcmp(&rx_pkt_hdr->rfc1042_hdr, bridge_tunnel_header,
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+		      sizeof(bridge_tunnel_header))) ||
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+	     (!memcmp(&rx_pkt_hdr->rfc1042_hdr, rfc1042_header,
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+		      sizeof(rfc1042_header)) &&
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+	      ntohs(rx_pkt_hdr->rfc1042_hdr.snap_type) != ETH_P_AARP &&
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+	      ntohs(rx_pkt_hdr->rfc1042_hdr.snap_type) != ETH_P_IPX))) {
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 		/*
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 		 *  Replace the 803 header and rfc1042 header (llc/snap) with an
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 		 *    EthernetII header, keep the src/dst and snap_type
..
..
@@ -206,7 +217,8 @@
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217
 
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 	rx_pkt_hdr = (void *)local_rx_pd + rx_pkt_offset;
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219
 
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-	if ((rx_pkt_offset + rx_pkt_length) > (u16) skb->len) {
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+	if ((rx_pkt_offset + rx_pkt_length) > skb->len ||
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+	    sizeof(rx_pkt_hdr->eth803_hdr) + rx_pkt_offset > skb->len) {
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 		mwifiex_dbg(adapter, ERROR,
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 			    "wrong rx packet: len=%d, rx_pkt_offset=%d, rx_pkt_length=%d\n",
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 			    skb->len, rx_pkt_offset, rx_pkt_length);