ipv6: tcp: add a missing tcp_v6_restore_cb()

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[ Upstream commit ebf6c9cb23 ]

Dmitry reported use-after-free in ip6_datagram_recv_specific_ctl()

A similar bug was fixed in commit 8ce48623f0 ("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: 971f10eca1 ("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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Eric Dumazet 2017-02-05 20:23:22 -08:00 • committed by Greg Kroah-Hartman

parent 00f1069e68

commit c12d69340e

1 changed files with 13 additions and 11 deletions

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net/ipv6/tcp_ipv6.c

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