[PATCH] Use after free in net/tulip/de2104x.c

hi,

this fixes coverity bug #912, where skb is freed first,
and dereferenced a few lines later with skb->len.

Signed-off-by: Eric Sesterhenn <snakebyte@gmx.de>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

diff --git a/drivers/net/tulip/de2104x.c b/drivers/net/tulip/de2104x.c
index 6299e186c73fe9ae5c5becdf3d58f2054b014252..e3dd144d326ba1212a81d97afd6212a9a2b1631d 100644 (file)
--- a/drivers/net/tulip/de2104x.c
+++ b/drivers/net/tulip/de2104x.c
@@ -1327,11 +1327,11 @@ static void de_clean_rings (struct de_private *de)
                struct sk_buff *skb = de->tx_skb[i].skb;
                if ((skb) && (skb != DE_DUMMY_SKB)) {
                        if (skb != DE_SETUP_SKB) {
-                               dev_kfree_skb(skb);
                                de->net_stats.tx_dropped++;
                                pci_unmap_single(de->pdev,
                                        de->tx_skb[i].mapping,
                                        skb->len, PCI_DMA_TODEVICE);
+                               dev_kfree_skb(skb);
                        } else {
                                pci_unmap_single(de->pdev,
                                        de->tx_skb[i].mapping,