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net: systemport: Add a check for oversized packets 

Occasionnaly we may get oversized packets from the hardware which exceed
the nomimal 2KiB buffer size we allocate SKBs with. Add an early check
which drops the packet to avoid invoking skb_over_panic() and move on to
processing the next packet.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
Florian Fainelli 2015-05-28 15:24:44 -07:00 committed by David S. Miller
parent c73b01837e
commit 25977ac77d
1 changed files with 8 additions and 0 deletions
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8
drivers/net/ethernet/broadcom/bcmsysport.c
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@ -638,6 +638,14 @@ static unsigned int bcm_sysport_desc_rx(struct bcm_sysport_priv *priv,
p_index, priv->rx_c_index, priv->rx_read_ptr,
len, status);
if (unlikely(len > RX_BUF_LENGTH)) {
netif_err(priv, rx_status, ndev, "oversized packet\n");
ndev->stats.rx_length_errors++;
ndev->stats.rx_errors++;
dev_kfree_skb_any(skb);
goto next;
}
if (unlikely(!(status & DESC_EOP) || !(status & DESC_SOP))) {
netif_err(priv, rx_status, ndev, "fragmented packet!\n");
ndev->stats.rx_dropped++;