From cc0b6fe88e99096868bdbacbf486c97299533b5a Mon Sep 17 00:00:00 2001 From: "Luis R. Rodriguez" Date: Fri, 20 Mar 2009 23:53:05 -0400 Subject: [PATCH] cfg80211: fix incorrect assumption on last_request for 11d The incorrect assumption is the last regulatory request (last_request) is always a country IE when processing country IEs. Although this is true 99% of the time the first time this happens this could not be true. This fixes an oops in the branch check for the last_request when accessing drv_last_ie. The access was done under the assumption the struct won't be null. Note to stable: to port to 29 replace as follows, only 29 has country IE code: s|NL80211_REGDOM_SET_BY_COUNTRY_IE|REGDOM_SET_BY_COUNTRY_IE Cc: stable@kernel.org Reported-by: Quentin Armitage Signed-off-by: Luis R. Rodriguez Signed-off-by: John W. Linville --- net/wireless/reg.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/net/wireless/reg.c b/net/wireless/reg.c index ead9dccb5475..9afc9168748b 100644 --- a/net/wireless/reg.c +++ b/net/wireless/reg.c @@ -1601,6 +1601,10 @@ static bool reg_same_country_ie_hint(struct wiphy *wiphy, assert_cfg80211_lock(); + if (unlikely(last_request->initiator != + NL80211_REGDOM_SET_BY_COUNTRY_IE)) + return false; + request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); if (!request_wiphy) @@ -1663,7 +1667,9 @@ void regulatory_hint_11d(struct wiphy *wiphy, * we optimize an early check to exit out early if we don't have to * do anything */ - if (likely(wiphy_idx_valid(last_request->wiphy_idx))) { + if (likely(last_request->initiator == + NL80211_REGDOM_SET_BY_COUNTRY_IE && + wiphy_idx_valid(last_request->wiphy_idx))) { struct cfg80211_registered_device *drv_last_ie; drv_last_ie = -- 2.30.2