linux-kernel - Re: Wireless-testing's b43 panics in b43_generate

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Date:	Mon, 02 Jun 2008 00:33:04 -0400
From:	Pavel Roskin <proski@....org>
To:	Johannes Berg <johannes@...solutions.net>
Cc:	linux-wireless <linux-wireless@...r.kernel.org>,
	"bcm43xx-dev@...ts.berlios.de" <bcm43xx-dev@...ts.berlios.de>,
	Michael Buesch <mb@...sch.de>, linux-kernel@...r.kernel.org
Subject: Re: Wireless-testing's b43 panics in b43_generate_txhdr on packet
	transmit

On Mon, 2008-06-02 at 00:08 -0400, Pavel Roskin wrote:

> wep_encrypt_skb() in wep.c would not return TX_CONTINUE.  But most  
> importantly, there is a suspicious change in wep_encrypt_skb() - the  
> key is set in the other branch of the condition.
> 
> I'll try to restore the original logic in wep.c.  I'll post a patch if  
> it works.

That was it!  Here's the patch (I'll submit it to John tomorrow if nobody objects).


mac80211: fix hardware WEP support

Setting hardware WEP key was accidentally moved to a wrong place in
57ccbb1cbe3f8e10a500ff8b9fb26dc1a542fe99.  Move it back.  This fixes
kernel panic in b43 if WEP is used.

Signed-off-by: Pavel Roskin <proski@....org>
---

 net/mac80211/wep.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/net/mac80211/wep.c b/net/mac80211/wep.c
index c9fd129..e7b6344 100644
--- a/net/mac80211/wep.c
+++ b/net/mac80211/wep.c
@@ -335,10 +335,10 @@ static int wep_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb)
 	info->control.icv_len = WEP_ICV_LEN;
 
 	if (!(tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) {
-		info->control.hw_key = &tx->key->conf;
 		if (ieee80211_wep_encrypt(tx->local, skb, tx->key))
 			return -1;
 	} else {
+		info->control.hw_key = &tx->key->conf;
 		if (tx->key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV) {
 			if (!ieee80211_wep_add_iv(tx->local, skb, tx->key))
 				return -1;


-- 
Regards,
Pavel Roskin
--
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