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vmxnet3: Fix memory leaks in rx path (fwd)
If rcd length was zero, the page used for frag was not being released. It was being replaced with a newly allocated page. This change takes care of that memory leak. Signed-off-by: Guolin Yang <gyang@vmware.com> Signed-off-by: Shreyas N Bhatewara <sbhatewara@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -861,6 +861,9 @@ vmxnet3_parse_and_copy_hdr(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
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, skb_headlen(skb));
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}
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if (skb->len <= VMXNET3_HDR_COPY_SIZE)
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ctx->copy_size = skb->len;
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/* make sure headers are accessible directly */
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if (unlikely(!pskb_may_pull(skb, ctx->copy_size)))
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goto err;
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@ -1273,36 +1276,36 @@ vmxnet3_rq_rx_complete(struct vmxnet3_rx_queue *rq,
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if (skip_page_frags)
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goto rcd_done;
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new_page = alloc_page(GFP_ATOMIC);
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if (unlikely(new_page == NULL)) {
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if (rcd->len) {
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new_page = alloc_page(GFP_ATOMIC);
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/* Replacement page frag could not be allocated.
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* Reuse this page. Drop the pkt and free the
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* skb which contained this page as a frag. Skip
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* processing all the following non-sop frags.
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*/
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rq->stats.rx_buf_alloc_failure++;
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dev_kfree_skb(ctx->skb);
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ctx->skb = NULL;
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skip_page_frags = true;
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goto rcd_done;
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}
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if (unlikely(!new_page)) {
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rq->stats.rx_buf_alloc_failure++;
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dev_kfree_skb(ctx->skb);
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ctx->skb = NULL;
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skip_page_frags = true;
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goto rcd_done;
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}
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if (rcd->len) {
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dma_unmap_page(&adapter->pdev->dev,
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rbi->dma_addr, rbi->len,
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PCI_DMA_FROMDEVICE);
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vmxnet3_append_frag(ctx->skb, rcd, rbi);
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}
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/* Immediate refill */
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rbi->page = new_page;
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rbi->dma_addr = dma_map_page(&adapter->pdev->dev,
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rbi->page,
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0, PAGE_SIZE,
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PCI_DMA_FROMDEVICE);
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rxd->addr = cpu_to_le64(rbi->dma_addr);
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rxd->len = rbi->len;
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/* Immediate refill */
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rbi->page = new_page;
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rbi->dma_addr = dma_map_page(&adapter->pdev->dev
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, rbi->page,
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0, PAGE_SIZE,
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PCI_DMA_FROMDEVICE);
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rxd->addr = cpu_to_le64(rbi->dma_addr);
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rxd->len = rbi->len;
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}
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}
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