netdev - Re: [PATCH net-next stable] sctp: fully initialize sctp_outq in sctp_outq

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Date:	Wed, 12 Jun 2013 17:51:08 +0400
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	Neil Horman <nhorman@...driver.com>
CC:	linux-sctp@...r.kernel.org, Vlad Yasevich <vyasevich@...il.com>,
	netdev@...r.kernel.org, davem@...emloft.net
Subject: Re: [PATCH net-next stable] sctp: fully initialize sctp_outq in sctp_outq_init

Hello.

On 12-06-2013 16:59, Neil Horman wrote:

> In commit 2f94aabd9f6c925d77aecb3ff020f1cc12ed8f86, we modified

     Please also specify that commit's summary line in parens.

> sctp_outq_teardown to use sctp_outq_init to fully re-initalize the outq
> structure.  Steve West recently asked me why I removed the q->error = 0
> initalization from sctp_outq_teardown.  I did so because I was operating under
> the impression that sctp_outq_init would properly initalize that value for us,
> but it doesn't.  sctp_outq_init operates under the assumption that the outq
> struct is all 0's (as it is when called from sctp_association_init), but using
> it in __sctp_outq_teardown violates that assumption. We should do a memset in
> sctp_outq_init to ensure that the entire structure is in a known state there
> instead.

> Signed-off-by: Neil Horman <nhorman@...driver.com>
> Reported-by: "West, Steve (NSN - US/Fort Worth)" <steve.west@....com>
> CC: Vlad Yasevich <vyasevich@...il.com>
> CC: netdev@...r.kernel.org
> CC: davem@...emloft.net
> ---
>   net/sctp/outqueue.c | 7 +++----
>   1 file changed, 3 insertions(+), 4 deletions(-)
>
> diff --git a/net/sctp/outqueue.c b/net/sctp/outqueue.c
> index 32a4625..d8b6958 100644
> --- a/net/sctp/outqueue.c
> +++ b/net/sctp/outqueue.c
> @@ -206,6 +206,9 @@ static inline int sctp_cacc_skip(struct sctp_transport *primary,
>    */
>   void sctp_outq_init(struct sctp_association *asoc, struct sctp_outq *q)
>   {
> +

    Why empty line here?

> +	memset(q, 0, sizeof(struct sctp_outq));
> +

    sizeof(*q) would have been shorter...

WBR, Sergei

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