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authorroel kluin <roel.kluin@gmail.com>2009-07-30 02:26:32 +0200
committerDavid S. Miller <davem@davemloft.net>2009-07-30 22:27:28 +0200
commit3d54015b750e5d5e950a1dcee2735387fd4b6e1a (patch)
tree3973a0cf147b4069bf3b33609e191cd9c70a1d1d /drivers/net/3c515.c
parentdocbook: fix printk of ip address (diff)
downloadlinux-3d54015b750e5d5e950a1dcee2735387fd4b6e1a.tar.xz
linux-3d54015b750e5d5e950a1dcee2735387fd4b6e1a.zip
3c515: Write outside array bounds
if dev_alloc_skb() fails on the first iteration, a write to cp->rx_ring[-1] occurs. Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/3c515.c')
-rw-r--r--drivers/net/3c515.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/net/3c515.c b/drivers/net/3c515.c
index 3e00fa8ea65f..4a7c32895be5 100644
--- a/drivers/net/3c515.c
+++ b/drivers/net/3c515.c
@@ -832,7 +832,9 @@ static int corkscrew_open(struct net_device *dev)
skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
vp->rx_ring[i].addr = isa_virt_to_bus(skb->data);
}
- vp->rx_ring[i - 1].next = isa_virt_to_bus(&vp->rx_ring[0]); /* Wrap the ring. */
+ if (i != 0)
+ vp->rx_ring[i - 1].next =
+ isa_virt_to_bus(&vp->rx_ring[0]); /* Wrap the ring. */
outl(isa_virt_to_bus(&vp->rx_ring[0]), ioaddr + UpListPtr);
}
if (vp->full_bus_master_tx) { /* Boomerang bus master Tx. */