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authorPavel Roskin <proski@gnu.org>2005-10-04 21:33:10 -0400
committerJeff Garzik <jgarzik@pobox.com>2005-10-04 23:37:21 -0400
commit9bc39bec87ee3e35897fe27441e979e7c208f624 (patch)
tree7c46d832b837b4441f7f4e4465d908b0e3e02a36 /drivers/net/wireless/orinoco.c
parentbb77c03cf40fec911c4ce9610b8207bf0050a5fd (diff)
[PATCH] orinoco: Information leakage due to incorrect padding
The orinoco driver can send uninitialized data exposing random pieces of the system memory. This happens because data is not padded with zeroes when its length needs to be increased. Reported by Meder Kydyraliev <meder@o0o.nu> Signed-off-by: Pavel Roskin <proski@gnu.org> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
Diffstat (limited to 'drivers/net/wireless/orinoco.c')
-rw-r--r--drivers/net/wireless/orinoco.c14
1 files changed, 9 insertions, 5 deletions
diff --git a/drivers/net/wireless/orinoco.c b/drivers/net/wireless/orinoco.c
index 6deb7cc810c..cf3daaa1b36 100644
--- a/drivers/net/wireless/orinoco.c
+++ b/drivers/net/wireless/orinoco.c
@@ -503,9 +503,14 @@ static int orinoco_xmit(struct sk_buff *skb, struct net_device *dev)
return 0;
}
- /* Length of the packet body */
- /* FIXME: what if the skb is smaller than this? */
- len = max_t(int,skb->len - ETH_HLEN, ETH_ZLEN - ETH_HLEN);
+ /* Check packet length, pad short packets, round up odd length */
+ len = max_t(int, ALIGN(skb->len, 2), ETH_ZLEN);
+ if (skb->len < len) {
+ skb = skb_padto(skb, len);
+ if (skb == NULL)
+ goto fail;
+ }
+ len -= ETH_HLEN;
eh = (struct ethhdr *)skb->data;
@@ -557,8 +562,7 @@ static int orinoco_xmit(struct sk_buff *skb, struct net_device *dev)
p = skb->data;
}
- /* Round up for odd length packets */
- err = hermes_bap_pwrite(hw, USER_BAP, p, ALIGN(data_len, 2),
+ err = hermes_bap_pwrite(hw, USER_BAP, p, data_len,
txfid, data_off);
if (err) {
printk(KERN_ERR "%s: Error %d writing packet to BAP\n",