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cfg80211: avoid mem leak on driver hint set 

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.

Cc: stable@vger.kernel.org
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>
This commit is contained in:
Arik Nemtsov 2014-12-04 12:22:16 +02:00 committed by Johannes Berg
parent 08f6f14777
commit 34f05f543f
1 changed files with 4 additions and 1 deletions
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5
net/wireless/reg.c
View File

@ -1907,7 +1907,7 @@ static enum reg_request_treatment
reg_process_hint_driver(struct wiphy *wiphy, reg_process_hint_driver(struct wiphy *wiphy,
struct regulatory_request *driver_request) struct regulatory_request *driver_request)
{ {
const struct ieee80211_regdomain *regd; const struct ieee80211_regdomain *regd, *tmp;
enum reg_request_treatment treatment; enum reg_request_treatment treatment;
treatment = __reg_process_hint_driver(driver_request); treatment = __reg_process_hint_driver(driver_request);
@ -1927,7 +1927,10 @@ reg_process_hint_driver(struct wiphy *wiphy,
reg_free_request(driver_request); reg_free_request(driver_request);
return REG_REQ_IGNORE; return REG_REQ_IGNORE;
} }
tmp = get_wiphy_regdom(wiphy);
rcu_assign_pointer(wiphy->regd, regd); rcu_assign_pointer(wiphy->regd, regd);
rcu_free_regdom(tmp);
} }