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mac80211: bail out from prep_connection() if a reconfig is ongoing

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[ 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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Luca Coelho 2017-05-02 17:56:21 +03:00 • committed by Greg Kroah-Hartman
parent f477b9157b
commit 41a00b47fa
1 changed files with 4 additions and 0 deletions
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4
net/mac80211/mlme.c
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@ -4326,6 +4326,10 @@ 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);