Re: [PATCH net] net/dccp: fix use-after-free in dccp_invalid_packet

From: Eric Dumazet <redacted>
Date: Mon, 28 Nov 2016 06:26:49 -0800

From: Eric Dumazet <edumazet@google.com>

pskb_may_pull() can reallocate skb->head, we need to reload dh pointer
in dccp_invalid_packet() or risk use after free.

Bug found by Andrey Konovalov using syzkaller.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Andrey Konovalov <redacted>

Applied and queued up for -stable, thanks Eric.