From: Dan Williams <dcbw@redhat.com>
To: Stanislaw Gruszka <sgruszka@redhat.com>
Cc: linux-wireless@vger.kernel.org, stable@kernel.org,
"John W. Linville" <linville@tuxdriver.com>,
Chris Siebenmann <cks-rhbugzilla@cs.toronto.edu>
Subject: Re: [PATCH] airo: fix setting zero length WEP key
Date: Wed, 03 Feb 2010 12:43:44 -0800 [thread overview]
Message-ID: <1265229824.21707.10.camel@localhost.localdomain> (raw)
In-Reply-To: <1265121290-2969-1-git-send-email-sgruszka@redhat.com>
On Tue, 2010-02-02 at 15:34 +0100, Stanislaw Gruszka wrote:
> Patch prevents call set_wep_key() with zero key length. That fix long
> standing regression since commit c0380693520b1a1e4f756799a0edc379378b462a
> "airo: clean up WEP key operations". Additionally print call trace when
> someone will try to use improper parameters, and remove key.len = 0
> assignment, because it is in not possible code path.
What problem/regression does this actually fix? set_wep_key() should
never be called with zero-length key, so we should actually be returning
from that function instead of using WARN_ON() which would allow a
zero-length key to be set (which isn't really valid).
To disable a WEP key, the WEXT caller should be setting
IW_ENCODE_DISABLED in the flags, and *not* sending WEP keys. Or if they
do for some reason send WEP keys, they need to use the key flag
IW_ENCODE_NOKEY to ensure they key is marked as "invalid" and ignored by
the driver.
Dan
next prev parent reply other threads:[~2010-02-03 20:46 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-02 14:34 [PATCH] airo: fix setting zero length WEP key Stanislaw Gruszka
2010-02-02 18:32 ` Chris Siebenmann
2010-02-03 20:43 ` Dan Williams [this message]
2010-02-03 21:31 ` Chris Siebenmann
2010-02-04 21:44 ` Dan Williams
2010-02-04 22:10 ` Chris Siebenmann
2010-02-04 22:18 ` Dan Williams
2010-02-04 22:26 ` Chris Siebenmann
2010-02-04 22:39 ` Dan Williams
2010-02-04 22:42 ` Chris Siebenmann
2010-02-04 23:00 ` Dan Williams
2010-02-04 23:03 ` Chris Siebenmann
2010-02-04 23:26 ` Dan Williams
2010-02-04 23:30 ` Dan Williams
2010-02-04 23:36 ` Chris Siebenmann
2010-02-05 6:57 ` Dan Williams
2010-02-04 12:04 ` Stanislaw Gruszka
2010-02-04 12:07 ` [PATCH v2] " Stanislaw Gruszka
2010-02-04 16:41 ` Chris Siebenmann
2010-02-04 23:56 ` Dan Williams
2010-02-05 9:11 ` Stanislaw Gruszka
2010-02-05 6:59 ` Dan Williams
2010-02-05 7:06 ` [PATCH] airo: fix WEP key clearing after c0380693520b1a1e4f756799a0edc379378b462a Dan Williams
2010-02-05 16:26 ` Chris Siebenmann
2010-02-05 19:20 ` Dan Williams
2010-02-05 23:12 ` Chris Siebenmann
2010-02-08 23:47 ` Dan Williams
2010-02-09 16:25 ` Chris Siebenmann
2010-02-09 17:17 ` Chris Siebenmann
2010-02-08 20:55 ` [PATCH v2] airo: fix setting zero length WEP key John W. Linville
2010-02-08 23:44 ` Dan Williams
2010-02-08 20:53 ` John W. Linville
2010-02-09 8:27 ` [PATCH] airo: return from set_wep_key() when key length is zero Stanislaw Gruszka
2010-02-26 14:10 ` [PATCH resend] " Stanislaw Gruszka
2010-02-26 23:09 ` Dan Williams
2010-02-27 1:26 ` John W. Linville
2010-03-01 7:47 ` Stanislaw Gruszka
2010-02-26 23:09 ` [PATCH v2] airo: fix setting zero length WEP key Dan Williams
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