| From | Herton Ronaldo Krzesinski <> | Subject | [PATCH 102/222] solos-pci: fix double-free of TX skb in DMA mode | Date | Wed, 16 Jan 2013 13:55:02 -0200 |
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3.5.7.3 -stable review patch. If anyone has any objections, please let me know.
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From: David Woodhouse <dwmw2@infradead.org>
commit cae49ede00ec3d0cda290b03fee55b72b49efc11 upstream.
We weren't clearing card->tx_skb[port] when processing the TX done interrupt. If there wasn't another skb ready to transmit immediately, this led to a double-free because we'd free it *again* next time we did have a packet to send.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski@canonical.com> --- drivers/atm/solos-pci.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/atm/solos-pci.c b/drivers/atm/solos-pci.c index 9851093..1853a45 100644 --- a/drivers/atm/solos-pci.c +++ b/drivers/atm/solos-pci.c @@ -967,10 +967,11 @@ static uint32_t fpga_tx(struct solos_card *card) for (port = 0; tx_pending; tx_pending >>= 1, port++) { if (tx_pending & 1) { struct sk_buff *oldskb = card->tx_skb[port]; - if (oldskb) + if (oldskb) { pci_unmap_single(card->dev, SKB_CB(oldskb)->dma_addr, oldskb->len, PCI_DMA_TODEVICE); - + card->tx_skb[port] = NULL; + } spin_lock(&card->tx_queue_lock); skb = skb_dequeue(&card->tx_queue[port]); if (!skb) -- 1.7.9.5
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