-stable review patch. If anyone has any objections, please let us know. ------------------ From: Aubrey.Li Netpoll UDP input handler needs to pull up the UDP headers and handle receive checksum offloading properly just like the normal UDP input path does else we get corrupted checksums. [NET]: Fix UDP checksum issue in net poll mode. In net poll mode, the current checksum function doesn't consider the kind of packet which is padded to reach a specific minimum length. I believe that's the problem causing my test case failed. The following patch fixed this issue. Signed-off-by: Aubrey.Li Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/core/netpoll.c | 7 +++++++ 1 file changed, 7 insertions(+) --- a/net/core/netpoll.c +++ b/net/core/netpoll.c @@ -471,6 +471,13 @@ int __netpoll_rx(struct sk_buff *skb) if (skb->len < len || len < iph->ihl*4) goto out; + /* + * Our transport medium may have padded the buffer out. + * Now We trim to the true length of the frame. + */ + if (pskb_trim_rcsum(skb, len)) + goto out; + if (iph->protocol != IPPROTO_UDP) goto out; -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/