From a282707dd03b6cbf4acc77e2d0e9a4ea1ccb2d04 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Wed, 9 Jan 2013 16:16:53 +0100
Subject: [PATCH] ath9k: fix double-free bug on beacon generate failure

commit 1adb2e2b5f85023d17eb4f95386a57029df27c88 upstream.

When the next beacon is sent, the ath_buf from the previous run is reused.
If getting a new beacon from mac80211 fails, bf->bf_mpdu is not reset, yet
the skb is freed, leading to a double-free on the next beacon tx attempt,
resulting in a system crash.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
Reading git-format-patch failed