add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/net/usb/smsc75xx.c
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@@ -90,7 +90,9 @@
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 	ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
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 		 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
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 		 0, index, &buf, 4);
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-	if (unlikely(ret < 0)) {
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+	if (unlikely(ret < 4)) {
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+		ret = ret < 0 ? ret : -ENODATA;
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+
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 		netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
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 			    index, ret);
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 		return ret;
..
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@@ -2199,6 +2201,13 @@
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 		size = (rx_cmd_a & RX_CMD_A_LEN) - RXW_PADDING;
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 		align_count = (4 - ((size + RXW_PADDING) % 4)) % 4;
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+		if (unlikely(size > skb->len)) {
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+			netif_dbg(dev, rx_err, dev->net,
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+				  "size err rx_cmd_a=0x%08x\n",
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+				  rx_cmd_a);
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+			return 0;
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+		}
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+
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 		if (unlikely(rx_cmd_a & RX_CMD_A_RED)) {
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 			netif_dbg(dev, rx_err, dev->net,
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 				  "Error rx_cmd_a=0x%08x\n", rx_cmd_a);