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drivers: net: xgene: fix possible use after free 

Once TX has been enabled on a NIC, it is illegal to access skb,
as this skb might have been freed by another cpu, from TX completion
handler.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Mark Rutland <mark.rutland@arm.com>
Cc: Iyappan Subramanian <isubramanian@apm.com>
Acked-by: Iyappan Subramanian <isubramanian@apm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2015-11-25 09:02:10 -08:00 committed by David S. Miller
parent 880621c260
commit 9ffad80a9c
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/apm/xgene/xgene_enet_main.c
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@ -450,12 +450,12 @@ static netdev_tx_t xgene_enet_start_xmit(struct sk_buff *skb,
return NETDEV_TX_OK;
}
pdata->ring_ops->wr_cmd(tx_ring, count);
skb_tx_timestamp(skb);
pdata->stats.tx_packets++;
pdata->stats.tx_bytes += skb->len;
pdata->ring_ops->wr_cmd(tx_ring, count);
return NETDEV_TX_OK;
}