On 23.1.2016 01:41, Alexey Khoroshilov wrote:
> mpt_lan_sdu_send() and mpt_lan_post_receive_buckets() do not check
> if mapping dma memory succeed.
> The patch adds the checks and failure handling.
>
> Found by Linux Driver Verification project (linuxtesting.org).
>
> Signed-off-by: Alexey Khoroshilov <khoroshilov@xxxxxxxxx>
> ---
> drivers/message/fusion/mptlan.c | 14 ++++++++++++++
> 1 file changed, 14 insertions(+)
>
> diff --git a/drivers/message/fusion/mptlan.c b/drivers/message/fusion/mptlan.c
> index cbe96072a6cc..3b6c8a755713 100644
> --- a/drivers/message/fusion/mptlan.c
> +++ b/drivers/message/fusion/mptlan.c
> @@ -734,6 +734,12 @@ mpt_lan_sdu_send (struct sk_buff *skb, struct net_device *dev)
>
> dma = pci_map_single(mpt_dev->pcidev, skb->data, skb->len,
> PCI_DMA_TODEVICE);
> + if (pci_dma_mapping_error(mpt_dev->pcidev, dma)) {
> + netif_stop_queue(dev);
Hi Alexey,
isn't a mpt_put_msg_frame needed here ?
and a similar de-alloc in next chunk too?
-tms
> +
> + printk (KERN_ERR "%s: dma mapping failed\n", __func__);
> + return NETDEV_TX_BUSY;
> + }
>
> priv->SendCtl[ctx].skb = skb;
> priv->SendCtl[ctx].dma = dma;
> @@ -1232,6 +1238,14 @@ mpt_lan_post_receive_buckets(struct mpt_lan_priv *priv)
>
> dma = pci_map_single(mpt_dev->pcidev, skb->data,
> len, PCI_DMA_FROMDEVICE);
> + if (pci_dma_mapping_error(mpt_dev->pcidev, dma)) {
> + printk (KERN_WARNING
> + MYNAM "/%s: dma mapping failed\n",
> + __func__);
> + priv->mpt_rxfidx[++priv->mpt_rxfidx_tail] = ctx;
> + spin_unlock_irqrestore(&priv->rxfidx_lock, flags);
> + break;
> + }
>
> priv->RcvCtl[ctx].skb = skb;
> priv->RcvCtl[ctx].dma = dma;
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