linux-kernel - Re: [PATCH] wireless: wext: allocate space for NULL-termination for 32byte SSIDs

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Date:	Tue, 15 Dec 2009 18:20:35 +0800
From:	Daniel Mack <daniel@...aq.de>
To:	Johannes Berg <johannes@...solutions.net>
Cc:	David Miller <davem@...emloft.net>, linux-kernel@...r.kernel.org,
	dcbw@...hat.com, m.hirsch@...mfeld.com, netdev@...r.kernel.org,
	libertas-dev@...ts.infradead.org, stable@...nel.org,
	linux-wireless@...r.kernel.org
Subject: Re: [PATCH] wireless: wext: allocate space for NULL-termination
 for 32byte SSIDs

On Tue, Dec 15, 2009 at 11:07:14AM +0100, Johannes Berg wrote:
> On Tue, 2009-12-15 at 11:03 +0100, Johannes Berg wrote:
> 
> > Since you indicate the kernel crashed, it is likely that libertas is
> > treating the buffer as a string, instead of an SSID.

Ok, I dodn't know that - thanks for pointing it out. In my setup here,
SSIDs are always valid alphanumeric strings, and I was mislead by the
comment that mentions the NULL-termination.

> drivers/net/wireless/libertas$ grep lbs_deb_ * | grep ssid|grep '%s'
> assoc.c:	lbs_deb_join("current SSID '%s', ssid length %u\n",
> assoc.c:	lbs_deb_join("requested ssid '%s', ssid length %u\n",
> assoc.c:	lbs_deb_join("ADHOC_START: SSID '%s', ssid length %u\n",
> scan.c:		lbs_deb_wext("set_scan, essid '%s'\n",

Those macros are stubbed out as nops in my setup, so they can
unfortunately not be the reason. I'll dig deeper :)

Thanks,
Daniel
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