linux-kernel - Re: [BISECTED] ssh - Received disconnect from x.x.x.x: 2: Bad packet length 3149594624

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Message-ID: <20140225105756.GB22279@mudshark.cambridge.arm.com>
Date:	Tue, 25 Feb 2014 10:57:56 +0000
From:	Will Deacon <will.deacon@....com>
To:	Ivaylo Dimitrov <ivo.g.dimitrov.75@...il.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	"linux@....linux.org.uk" <linux@....linux.org.uk>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Pavel Machek <pavel@....cz>, Sebastian Reichel <sre@...g0.de>,
	Pali Rohár <pali.rohar@...il.com>,
	"kvalo@....qualcomm.com" <kvalo@....qualcomm.com>,
	"linville@...driver.com" <linville@...driver.com>
Subject: Re: [BISECTED] ssh - Received disconnect from x.x.x.x: 2: Bad packet
 length 3149594624

Hi Ivaylo,

On Tue, Feb 25, 2014 at 07:56:11AM +0000, Ivaylo Dimitrov wrote:
> On 14.02.2014 18:24, Will Deacon wrote:
> > You could try putting back the UNALIGNED_ACCESS in net/mac80211/rx.c and
> > commenting out the skb->len = desc->length  - PLCP_HEADER_LENGTH;  line
> > above.
> >
> 
> the following patch
> 
> diff --git a/drivers/net/wireless/ti/wl1251/rx.c 
> b/drivers/net/wireless/ti/wl1251/rx.c
> index 123c4bb..cde0eaf 100644
> --- a/drivers/net/wireless/ti/wl1251/rx.c
> +++ b/drivers/net/wireless/ti/wl1251/rx.c
> @@ -180,7 +180,7 @@ static void wl1251_rx_body(struct wl1251 *wl,
>          wl1251_mem_read(wl, rx_packet_ring_addr, rx_buffer, length);
> 
>          /* The actual length doesn't include the target's alignment */
> -       skb->len = desc->length  - PLCP_HEADER_LENGTH;
> +       skb_trim(skb, desc->length - PLCP_HEADER_LENGTH);
> 
>          fc = (u16 *)skb->data;
> 
> seems to fix the issue, including those "corrupt probe response" 
> messages in dmesg log (I took that 'skb_trim' from the original Nokia 
> kernel). Will send a properly formatted patch shortly.

Good idea -- don't forget to CC linux-wireless, as suggested by Kalle.

Will
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