[PATCH 4.9 013/310] mac80211: bail out from prep_connection() if a reconfig is ongoing
From: Greg Kroah-Hartman
Date: Wed Apr 11 2018 - 16:16:33 EST
4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Luca Coelho <luciano.coelho@xxxxxxxxx>
[ Upstream commit f8860ce836f2d502b07ef99559707fe55d90f5bc ]
If ieee80211_hw_restart() is called during authentication, the
authentication process will continue, causing the driver to be called
in a wrong state. This ultimately causes an oops in the iwlwifi
driver (at least).
This fixes bugzilla 195299 partly.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=195299
Signed-off-by: Luca Coelho <luciano.coelho@xxxxxxxxx>
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/mac80211/mlme.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -4332,6 +4332,10 @@ static int ieee80211_prep_connection(str
if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
return -EINVAL;
+ /* If a reconfig is happening, bail out */
+ if (local->in_reconfig)
+ return -EBUSY;
+
if (assoc) {
rcu_read_lock();
have_sta = sta_info_get(sdata, cbss->bssid);