linux-kernel - [ 110/127] cfg80211: check wdev->netdev in connection work

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Message-Id: <20130605213230.518489536@linuxfoundation.org>
Date:	Wed,  5 Jun 2013 14:34:37 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, YanBo <dreamfly281@...il.com>,
	Johannes Berg <johannes.berg@...el.com>
Subject: [ 110/127] cfg80211: check wdev->netdev in connection work

3.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Johannes Berg <johannes.berg@...el.com>

commit c815797663b72e3ac1736f1886538152bc48e4af upstream.

If a P2P-Device is present and another virtual interface triggers
the connection work, the system crash because it tries to check
if the P2P-Device's netdev (which doesn't exist) is up. Skip any
wdevs that have no netdev to fix this.

Reported-by: YanBo <dreamfly281@...il.com>
Signed-off-by: Johannes Berg <johannes.berg@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 net/wireless/sme.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/net/wireless/sme.c
+++ b/net/wireless/sme.c
@@ -227,6 +227,9 @@ void cfg80211_conn_work(struct work_stru
 	mutex_lock(&rdev->sched_scan_mtx);
 
 	list_for_each_entry(wdev, &rdev->wdev_list, list) {
+		if (!wdev->netdev)
+			continue;
+
 		wdev_lock(wdev);
 		if (!netif_running(wdev->netdev)) {
 			wdev_unlock(wdev);


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