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cfg80211: avoid mem leak on driver hint set 

commit 34f05f543f upstream.

In the already-set and intersect case of a driver-hint, the previous
wiphy regdomain was not freed before being reset with a copy of the
cfg80211 regdomain.

Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
Acked-by: Luis R. Rodriguez <mcgrof@suse.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Arik Nemtsov 2014-12-04 12:22:16 +02:00 committed by Greg Kroah-Hartman
parent 8ddc4f7e41
commit 466e935215
1 changed files with 4 additions and 1 deletions
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5
net/wireless/reg.c
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@ -1547,7 +1547,7 @@ static enum reg_request_treatment
reg_process_hint_driver(struct wiphy *wiphy,
struct regulatory_request *driver_request)
{
const struct ieee80211_regdomain *regd;
const struct ieee80211_regdomain *regd, *tmp;
enum reg_request_treatment treatment;
treatment = __reg_process_hint_driver(driver_request);
@ -1566,7 +1566,10 @@ reg_process_hint_driver(struct wiphy *wiphy,
kfree(driver_request);
return REG_REQ_IGNORE;
}
tmp = get_wiphy_regdom(wiphy);
rcu_assign_pointer(wiphy->regd, regd);
rcu_free_regdom(tmp);
}