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staging: fsl-dpaa2/eth: Fix skb use after free 

Once a Tx frame descriptor is enqueued, an interrupt might be triggered
to process the Tx confirmation and free the skb, hitting a memory use
after free when updating the tx_bytes statistic based on skb->len.

Use the frame descriptor length instead.

Signed-off-by: Bogdan Purcareata <bogdan.purcareata@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Bogdan Purcareata 2017-07-20 10:58:37 +00:00 committed by Greg Kroah-Hartman
parent 5be271ff96
commit 3c70d958cf
1 changed files with 1 additions and 1 deletions
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2
drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c
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@ -616,7 +616,7 @@ static netdev_tx_t dpaa2_eth_tx(struct sk_buff *skb, struct net_device *net_dev)
free_tx_fd(priv, &fd, NULL);
} else {
percpu_stats->tx_packets++;
percpu_stats->tx_bytes += skb->len;
percpu_stats->tx_bytes += dpaa2_fd_get_len(&fd);
}
return NETDEV_TX_OK;