linux-kernel - Re: [PATCH] ieee802154: mcr20a: simplify a bit 'mcr20a_handle_rx_read_buf

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <388f335a-a9ae-7230-1713-a1ecb682fecf@datenfreihafen.org>
Date:   Sat, 21 Sep 2019 13:52:11 +0200
From:   Stefan Schmidt <stefan@...enfreihafen.org>
To:     Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        liuxuenetmail@...il.com, alex.aring@...il.com, davem@...emloft.net
Cc:     linux-wpan@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] ieee802154: mcr20a: simplify a bit
 'mcr20a_handle_rx_read_buf_complete()'

Hello Xue.

On 20.09.19 21:45, Christophe JAILLET wrote:
> Use a 'skb_put_data()' variant instead of rewritting it.
> The __skb_put_data variant is safe here. It is obvious that the skb can
> not overflow. It has just been allocated a few lines above with the same
> 'len'.
> 
> Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
> ---
>  drivers/net/ieee802154/mcr20a.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ieee802154/mcr20a.c b/drivers/net/ieee802154/mcr20a.c
> index 17f2300e63ee..8dc04e2590b1 100644
> --- a/drivers/net/ieee802154/mcr20a.c
> +++ b/drivers/net/ieee802154/mcr20a.c
> @@ -800,7 +800,7 @@ mcr20a_handle_rx_read_buf_complete(void *context)
>  	if (!skb)
>  		return;
>  
> -	memcpy(skb_put(skb, len), lp->rx_buf, len);
> +	__skb_put_data(skb, lp->rx_buf, len);
>  	ieee802154_rx_irqsafe(lp->hw, skb, lp->rx_lqi[0]);
>  
>  	print_hex_dump_debug("mcr20a rx: ", DUMP_PREFIX_OFFSET, 16, 1,
> 

Could you please review and ACK this? If you are happy I will take it
through my tree.

regards
Stefan Schmidt