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cfg80211/mac80211: avoid state mishmash on deauth

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Avoid situation when we are on associate state in mac80211 and
on disassociate state in cfg80211. This can results on crash
during modules unload (like showed on this thread:
http://marc.info/?t=134373976300001&r=1&w=2) and possibly other
problems.

Reported-by: Pedro Francisco <pedrogfrancisco@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Stanislaw Gruszka
2012-10-15 14:52:41 +02:00
committed by Johannes Berg
parent df9b42963f
commit 6863255bd0
3 changed files with 7 additions and 11 deletions
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12
net/wireless/mlme.c
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@@ -457,20 +457,14 @@ int __cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
.reason_code = reason,
.ie = ie,
.ie_len = ie_len,
.local_state_change = local_state_change,
};
ASSERT_WDEV_LOCK(wdev);
if (local_state_change) {
if (wdev->current_bss &&
ether_addr_equal(wdev->current_bss->pub.bssid, bssid)) {
cfg80211_unhold_bss(wdev->current_bss);
cfg80211_put_bss(&wdev->current_bss->pub);
wdev->current_bss = NULL;
}
if (local_state_change && (!wdev->current_bss ||
!ether_addr_equal(wdev->current_bss->pub.bssid, bssid)))
return 0;
}
return rdev->ops->deauth(&rdev->wiphy, dev, &req);
}