netdev - Re: [PATCH net-next] sctp: also point GSO head

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Message-Id: <20160725.112501.2010684051493485788.davem@davemloft.net>
Date:	Mon, 25 Jul 2016 11:25:01 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	marcelo.leitner@...il.com
Cc:	netdev@...r.kernel.org, vyasevich@...il.com, nhorman@...driver.com,
	linux-sctp@...r.kernel.org
Subject: Re: [PATCH net-next] sctp: also point GSO head_skb to the sk when
 it's available

From: Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
Date: Sat, 23 Jul 2016 00:33:44 -0300

> The head skb for GSO packets won't travel through the inner depths of
> SCTP stack as it doesn't contain any chunks on it. That means skb->sk
> doesn't get set and then when sctp_recvmsg() calls
> sctp_inet6_skb_msgname() on the head_skb it panics, as this last needs
> to check flags at the socket (sp->v4mapped).
> 
> The fix is to initialize skb->sk for th head skb once we are able to do
> it. That is, when the first chunk is processed.
> 
> Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@...il.com>

Applied.