linux-kernel - Re: [PATCH 1/1] ath5k: fix hw rate index condition

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]

Date:	Sun, 15 Feb 2009 08:47:02 -0500
From:	Bob Copeland <me@...copeland.com>
To:	Dhaval Giani <dhaval.lists@...gianis.in>
Cc:	Jiri Slaby <jirislaby@...il.com>,
	Dhaval Giani <dhaval@...ux.vnet.ibm.com>,
	linville@...driver.com, davem@...emloft.net,
	linux-wireless@...r.kernel.org, ath5k-devel@...ema.h4ckr.net,
	Nick Kossifidis <mickflemm@...il.com>,
	"Luis R. Rodriguez" <lrodriguez@...eros.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] ath5k: fix hw rate index condition

On Mon, Feb 02, 2009 at 01:27:39PM +0530, Dhaval Giani wrote:
> So I finally managed to hit this on 2.6.29-rc3. It is hard to
> reproduce, so I hope so much information is enough to give you a good
> guess. This time it hit while trying to connect to an open network at
> the airport.

> WARNING: at net/mac80211/rx.c:2236 __ieee80211_rx+0x96/0x571 [mac80211]()
> Hardware name: 2007CS3
> RATE=255, BAND=8

band is supposed to be sc->curband?  8 is way wrong.  rate could be 255
if, for some reason, the hardware rate wasn't in the rate table.

> Pid: 2634, comm: X Not tainted 2.6.29-rc3 #18
> Call Trace:
>  [<c0430636>] warn_slowpath+0x76/0xad
>  [<c04508d7>] ? __lock_acquire+0xb36/0xb45
>  [<f7dd0205>] __ieee80211_rx+0x96/0x571 [mac80211]
>  [<f7e37976>] ath5k_tasklet_rx+0x4fb/0x53d [ath5k]
>  [<c06fa5c3>] ? _spin_unlock_irq+0x27/0x34
>  [<c0434f91>] tasklet_action+0x85/0xf0

Interestingly I hit this just the other day -- I was debugging something
else and had a serial console hooked up, otherwise I wouldn't have
noticed at all.  It happened at some point during a suspend-to-ram
sequence, which makes at least my version sound like a race condition
of some sort.



--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/