2.6.36-stable review patch. If anyone has any objections, please let us know.
------------------ From: Marek Lindner <[email protected]> commit b6faaae1a15a352d68b3e3cd8b840e56709820bf upstream. eth_type_trans tries to pull data with the length of the ethernet header from the skb. We only ensured that enough data for the first ethernet header and the batman header is available in non-paged memory of the skb and not for the ethernet after the batman header. eth_type_trans would fail sometimes with drivers which don't ensure that all there data is perfectly linearised. The failure was noticed through a kernel bug Oops generated by the skb_pull inside eth_type_trans. Reported-by: Rafal Lesniak <[email protected]> Signed-off-by: Marek Lindner <[email protected]> Signed-off-by: Sven Eckelmann <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/staging/batman-adv/soft-interface.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/drivers/staging/batman-adv/soft-interface.c +++ b/drivers/staging/batman-adv/soft-interface.c @@ -246,6 +246,10 @@ void interface_rx(struct sk_buff *skb, i skb_pull_rcsum(skb, hdr_size); /* skb_set_mac_header(skb, -sizeof(struct ethhdr));*/ + if (unlikely(!pskb_may_pull(skb, ETH_HLEN))) { + kfree_skb(skb); + return; + } skb->dev = dev; skb->protocol = eth_type_trans(skb, dev); _______________________________________________ stable mailing list [email protected] http://linux.kernel.org/mailman/listinfo/stable
