From 697e6a0fb0c8783695d4b4a5d7131476b296d623 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Sun, 17 Jan 2010 01:47:56 +0100 Subject: [PATCH] mac80211: clear TX control on filtered frames When an skb survived a round-trip through the driver and needs to be re-used, its control information is definitely not valid any more, the driver will have overwritten it. Signed-off-by: Johannes Berg Signed-off-by: John W. Linville --- net/mac80211/status.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/net/mac80211/status.c b/net/mac80211/status.c index 0ebcdda2420..9e171b17827 100644 --- a/net/mac80211/status.c +++ b/net/mac80211/status.c @@ -69,6 +69,14 @@ static void ieee80211_handle_filtered_frame(struct ieee80211_local *local, */ goto drop; + /* + * This skb 'survived' a round-trip through the driver, and + * hopefully the driver didn't mangle it too badly. However, + * we can definitely not rely on the the control information + * being correct. Clear it so we don't get junk there. + */ + memset(&info->control, 0, sizeof(info->control)); + sta->tx_filtered_count++; /* -- 2.39.5