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net: bcmgenet: Add a check for oversized packets 

[ Upstream commit 5c0862c2c9 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Florian Fainelli 2023-01-26 16:08:19 -08:00 committed by Greg Kroah-Hartman
parent 94b28dc12f
commit 5f56767fb5
1 changed files with 8 additions and 0 deletions
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8
drivers/net/ethernet/broadcom/genet/bcmgenet.c
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@ -2311,6 +2311,14 @@ static unsigned int bcmgenet_desc_rx(struct bcmgenet_rx_ring *ring,
__func__, p_index, ring->c_index,
ring->read_ptr, dma_length_status);
if (unlikely(len > RX_BUF_LENGTH)) {
netif_err(priv, rx_status, dev, "oversized packet\n");
dev->stats.rx_length_errors++;
dev->stats.rx_errors++;
dev_kfree_skb_any(skb);
goto next;
}
if (unlikely(!(dma_flag & DMA_EOP) || !(dma_flag & DMA_SOP))) {
netif_err(priv, rx_status, dev,
"dropping fragmented packet!\n");