tree 816e6aa13cc30e06a1514464a121e043d207de43
parent a89e2ff894bc317a49b9b46ef70eb62e05a8bf7c
author Sabrina Dubroca <sd@queasysnail.net> 1480693769 +0100
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1481393244 +0100

geneve: avoid use-after-free of skb->data

[ Upstream commit 5b01014759991887b1e450c9def01e58c02ab81b ]

geneve{,6}_build_skb can end up doing a pskb_expand_head(), which
makes the ip_hdr(skb) reference we stashed earlier stale. Since it's
only needed as an argument to ip_tunnel_ecn_encap(), move this
directly in the function call.

Fixes: 08399efc6319 ("geneve: ensure ECN info is handled properly in all tx/rx paths")
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Reviewed-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>