Patch "udpv6: Fix the checksum computation when HW checksum does not apply" has been added to the 4.4-stable tree

Patch "udpv6: Fix the checksum computation when HW checksum does not apply" has been added to the 4.4-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    udpv6: Fix the checksum computation when HW checksum does not apply

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     udpv6-fix-the-checksum-computation-when-hw-checksum-does-not-apply.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Thu Oct 19 14:05:19 CEST 2017
From: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
Date: Wed, 13 Sep 2017 19:30:51 -0600
Subject: udpv6: Fix the checksum computation when HW checksum does not apply

From: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>


[ Upstream commit 63ecc3d9436f8012e49dc846d6cb0a85a3433517 ]

While trying an ESP transport mode encryption for UDPv6 packets of
datagram size 1436 with MTU 1500, checksum error was observed in
the secondary fragment.

This error occurs due to the UDP payload checksum being missed out
when computing the full checksum for these packets in
udp6_hwcsum_outgoing().

Fixes: d39d938c8228 ("ipv6: Introduce udpv6_send_skb()")
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/ipv6/udp.c |    1 +
 1 file changed, 1 insertion(+)

--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -1007,6 +1007,7 @@ static void udp6_hwcsum_outgoing(struct
 		 */
 		offset = skb_transport_offset(skb);
 		skb->csum = skb_checksum(skb, offset, skb->len - offset, 0);
+		csum = skb->csum;
 
 		skb->ip_summed = CHECKSUM_NONE;
 


Patches currently in stable-queue which might be from subashab@codeaurora.org are

queue-4.4/udpv6-fix-the-checksum-computation-when-hw-checksum-does-not-apply.patch