netdev - Re: [PATCH net] sctp: fix the data size calculation in sctp_data

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Message-ID: <20181017180010.GH6761@localhost.localdomain>
Date:   Wed, 17 Oct 2018 15:00:10 -0300
From:   Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
To:     Xin Long <lucien.xin@...il.com>
Cc:     network dev <netdev@...r.kernel.org>, linux-sctp@...r.kernel.org,
        davem@...emloft.net, Neil Horman <nhorman@...driver.com>
Subject: Re: [PATCH net] sctp: fix the data size calculation in sctp_data_size

On Wed, Oct 17, 2018 at 09:11:27PM +0800, Xin Long wrote:
> sctp data size should be calculated by subtracting data chunk header's
> length from chunk_hdr->length, not just data header.
> 
> Fixes: 668c9beb9020 ("sctp: implement assign_number for sctp_stream_interleave")
> Signed-off-by: Xin Long <lucien.xin@...il.com>

Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@...il.com>

> ---
>  include/net/sctp/sm.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/include/net/sctp/sm.h b/include/net/sctp/sm.h
> index 5ef1bad..9e3d327 100644
> --- a/include/net/sctp/sm.h
> +++ b/include/net/sctp/sm.h
> @@ -347,7 +347,7 @@ static inline __u16 sctp_data_size(struct sctp_chunk *chunk)
>  	__u16 size;
>  
>  	size = ntohs(chunk->chunk_hdr->length);
> -	size -= sctp_datahdr_len(&chunk->asoc->stream);
> +	size -= sctp_datachk_len(&chunk->asoc->stream);
>  
>  	return size;
>  }
> -- 
> 2.1.0
>