Johann Uhrmann reported a bcm43xx crash and Michael Buesch tracked it down
to a problem with the new shared key auth code (recursive calls into the driver)
This patch (effectively Michael's patch with a couple of small modifications)
solves the problem by sending the authentication challenge response frame
from a workqueue entry.
I also removed a lone \n from the bcm43xx messages relating to authentication
mode - this small change was previously discussed but not patched in.
Signed-off-by: Daniel Drake <[EMAIL PROTECTED]>
Acked-by: Johannes Berg <[EMAIL PROTECTED]>
Index: linux/net/ieee80211/softmac/ieee80211softmac_auth.c
===================================================================
--- linux.orig/net/ieee80211/softmac/ieee80211softmac_auth.c
+++ linux/net/ieee80211/softmac/ieee80211softmac_auth.c
@@ -116,6 +116,16 @@ ieee80211softmac_auth_queue(void *data)
kfree(auth);
}
+/* Sends a response to an auth challenge (for shared key auth). */
+static void
+ieee80211softmac_auth_challenge_response(void *_aq)
+{
+ struct ieee80211softmac_auth_queue_item *aq = _aq;
+
+ /* Send our response */
+ ieee80211softmac_send_mgt_frame(aq->mac, aq->net, IEEE80211_STYPE_AUTH,
aq->state);
+}
+
/* Handle the auth response from the AP
* This should be registered with ieee80211 as handle_auth
*/
@@ -197,24 +207,30 @@ ieee80211softmac_auth_resp(struct net_de
case IEEE80211SOFTMAC_AUTH_SHARED_CHALLENGE:
/* Check to make sure we have a challenge IE */
data = (u8 *)auth->info_element;
- if(*data++ != MFIE_TYPE_CHALLENGE){
+ if (*data++ != MFIE_TYPE_CHALLENGE) {
printkl(KERN_NOTICE PFX "Shared Key
Authentication failed due to a missing challenge.\n");
break;
}
/* Save the challenge */
spin_lock_irqsave(&mac->lock, flags);
net->challenge_len = *data++;
- if(net->challenge_len > WLAN_AUTH_CHALLENGE_LEN)
+ if (net->challenge_len > WLAN_AUTH_CHALLENGE_LEN)
net->challenge_len = WLAN_AUTH_CHALLENGE_LEN;
- if(net->challenge != NULL)
+ if (net->challenge != NULL)
kfree(net->challenge);
net->challenge = kmalloc(net->challenge_len,
GFP_ATOMIC);
memcpy(net->challenge, data, net->challenge_len);
aq->state = IEEE80211SOFTMAC_AUTH_SHARED_RESPONSE;
- spin_unlock_irqrestore(&mac->lock, flags);
- /* Send our response */
- ieee80211softmac_send_mgt_frame(mac, aq->net,
IEEE80211_STYPE_AUTH, aq->state);
+ /* We reuse the work struct from the auth request here.
+ * It is safe to do so as each one is per-request, and
+ * at this point (dealing with authentication response)
+ * we have obviously already sent the initial auth
+ * request. */
+ cancel_delayed_work(&aq->work);
+ INIT_WORK(&aq->work,
&ieee80211softmac_auth_challenge_response, (void *)aq);
+ schedule_work(&aq->work);
+ spin_unlock_irqrestore(&mac->lock, flags);
return 0;
case IEEE80211SOFTMAC_AUTH_SHARED_PASS:
kfree(net->challenge);
Index: linux/drivers/net/wireless/bcm43xx/bcm43xx_main.c
===================================================================
--- linux.orig/drivers/net/wireless/bcm43xx/bcm43xx_main.c
+++ linux/drivers/net/wireless/bcm43xx/bcm43xx_main.c
@@ -3701,7 +3701,7 @@ static void bcm43xx_ieee80211_set_securi
}
if (sec->flags & SEC_AUTH_MODE) {
secinfo->auth_mode = sec->auth_mode;
- dprintk(", .auth_mode = %d\n", sec->auth_mode);
+ dprintk(", .auth_mode = %d", sec->auth_mode);
}
dprintk("\n");
if (bcm43xx_status(bcm) == BCM43xx_STAT_INITIALIZED &&
-
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