From 100f4756d42036cca5968ef82542ecf6bccbc8a1 Mon Sep 17 00:00:00 2001 From: "Aubrey.Li" Date: Tue, 17 Apr 2007 14:46:33 -0700 Subject: Fix netpoll UDP input path 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(+) (limited to 'net') diff --git a/net/core/netpoll.c b/net/core/netpoll.c index 823215d8e90..522e44173e5 100644 --- 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; -- cgit v1.2.3-18-g5258