[PATCH net-next v2 3/3] net: systemport: Add a check for oversized packets
From: Florian Fainelli <f.fainelli@gmail.com>
Date: 2015-05-29 16:50:13
Subsystem:
broadcom systemport ethernet driver, networking drivers, the rest · Maintainers:
Florian Fainelli, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
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. Reviewed-by: Petri Gynther <redacted> Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> --- drivers/net/ethernet/broadcom/bcmsysport.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/drivers/net/ethernet/broadcom/bcmsysport.c b/drivers/net/ethernet/broadcom/bcmsysport.c
index 62ea403e15b8..bbd8676a9675 100644
--- a/drivers/net/ethernet/broadcom/bcmsysport.c
+++ b/drivers/net/ethernet/broadcom/bcmsysport.c@@ -632,6 +632,14 @@ 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++;
--
2.1.0