| From | Sasha Levin <> | Subject | [PATCH AUTOSEL for 4.9 013/281] mac80211: bail out from prep_connection() if a reconfig is ongoing | Date | Mon, 19 Mar 2018 15:58:05 +0000 |
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From: Luca Coelho <luciano.coelho@intel.com>
[ 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@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> --- net/mac80211/mlme.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index 1118c61f835d..e471b273d0f1 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -4322,6 +4322,10 @@ static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 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); -- 2.14.1
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