tree 933da44e1f1594050e3d326803fa85f227fb177b
parent ae1768bbbc469b75662c6714957fe5886cc960c4
author Eric Dumazet <edumazet@google.com> 1486355002 -0800
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1487427101 +0100

ipv6: tcp: add a missing tcp_v6_restore_cb()

[ Upstream commit ebf6c9cb23d7e56eec8575a88071dec97ad5c6e2 ]

Dmitry reported use-after-free in ip6_datagram_recv_specific_ctl()

A similar bug was fixed in commit 8ce48623f0cf ("ipv6: tcp: restore
IP6CB for pktoptions skbs"), but I missed another spot.

tcp_v6_syn_recv_sock() can indeed set np->pktoptions from ireq->pktopts

Fixes: 971f10eca186 ("tcp: better TCP_SKB_CB layout to reduce cache line misses")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>