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| author | David Woodhouse <dwmw2@infradead.org> | 2012-12-11 14:57:14 +0000 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2013-01-03 03:33:37 +0000 |
| commit | fa184e74c74a264e0e33ea8807ae66f248ce0c78 (patch) | |
| tree | 6ab41a47edbeb922e4d6177ee4ebdbd7e0661c8f /drivers/atm | |
| parent | 6f2aad2b4120b1770d8bc89c5b6feef347238585 (diff) | |
| download | kernel_samsung_smdk4412-fa184e74c74a264e0e33ea8807ae66f248ce0c78.zip kernel_samsung_smdk4412-fa184e74c74a264e0e33ea8807ae66f248ce0c78.tar.gz kernel_samsung_smdk4412-fa184e74c74a264e0e33ea8807ae66f248ce0c78.tar.bz2 | |
solos-pci: fix double-free of TX skb in DMA mode
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: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'drivers/atm')
| -rw-r--r-- | drivers/atm/solos-pci.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/atm/solos-pci.c b/drivers/atm/solos-pci.c index d452592..adfce9f 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) |