From: Johannes Berg <johannes.berg@intel.com>
Date: Tue, 24 Nov 2015 19:28:27 +0000 (+0100)
Subject: mac80211: fix mgmt-tx abort cookie and leak
X-Git-Tag: v4.5-rc1~128^2~189^2~13
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e673a65952b4ab045a3e3eb200fdf408004fb4fd;p=platform%2Fkernel%2Flinux-exynos.git

mac80211: fix mgmt-tx abort cookie and leak

If a mgmt-tx operation is aborted before it runs, the wrong
cookie is reported back to userspace, and the ack_skb gets
leaked since the frame is freed directly instead of freeing
it using ieee80211_free_txskb(). Fix that.

Fixes: 3b79af973cf4 ("mac80211: stop using pointers as userspace cookies")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---

diff --git a/net/mac80211/offchannel.c b/net/mac80211/offchannel.c
index 0440103..0fe9f74 100644
--- a/net/mac80211/offchannel.c
+++ b/net/mac80211/offchannel.c
@@ -308,11 +308,10 @@ void ieee80211_roc_notify_destroy(struct ieee80211_roc_work *roc, bool free)
 
 	/* was never transmitted */
 	if (roc->frame) {
-		cfg80211_mgmt_tx_status(&roc->sdata->wdev,
-					(unsigned long)roc->frame,
+		cfg80211_mgmt_tx_status(&roc->sdata->wdev, roc->mgmt_tx_cookie,
 					roc->frame->data, roc->frame->len,
 					false, GFP_KERNEL);
-		kfree_skb(roc->frame);
+		ieee80211_free_txskb(&roc->sdata->local->hw, roc->frame);
 	}
 
 	if (!roc->mgmt_tx_cookie)