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.
v3: Fix resource deallocation (reported by Tomas Henzl).
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Alexey Khoroshilov <khoroshilov@xxxxxxxxx>
---
drivers/message/fusion/mptlan.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/drivers/message/fusion/mptlan.c b/drivers/message/fusion/mptlan.c
index cbe96072a6cc..e9b83fc7be35 100644
--- a/drivers/message/fusion/mptlan.c
+++ b/drivers/message/fusion/mptlan.c
@@ -734,6 +734,13 @@ 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)) {
+ mpt_put_msg_frame(LanCtx, mpt_dev, mf);
+ netif_stop_queue(dev);
+
+ 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 +1239,15 @@ 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__);
+ dev_kfree_skb(skb);
+ 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;
--
1.9.1
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