This is a note to let you know that I've just added the patch titled
net: bcmgenet: Add a check for oversized packets
to the 4.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-bcmgenet-add-a-check-for-oversized-packets.patch
and it can be found in the queue-4.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit ea5bdae1295454b7095e803c18eff65406daf06c
Author: Florian Fainelli <f.fainelli@xxxxxxxxx>
Date: Thu Jan 26 16:08:19 2023 -0800
net: bcmgenet: Add a check for oversized packets
[ Upstream commit 5c0862c2c962052ed5055220a00ac1cefb92fbcd ]
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@xxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.c b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
index 9bb398d058379..e5e52c0c39a55 100644
--- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c
+++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
@@ -1799,6 +1799,14 @@ 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");
