From 109843b07aed8663a3c1fe9ef02c540b6ff203b4 Mon Sep 17 00:00:00 2001 From: Lorenzo Bianconi Date: Fri, 19 Feb 2016 12:18:01 +0100 Subject: [PATCH] mac80211: fix wiphy supported_band access Fix wiphy supported_band access in tx radiotap parsing introduced in commit 5ec3aed9ba4c ("mac80211: Parse legacy and HT rate in injected frames"). In particular, info->band is always set to 0 (IEEE80211_BAND_2GHZ) since it has not assigned yet. This cause a kernel crash on 5GHz only devices. Move ieee80211_parse_tx_radiotap() after info->band assignment Signed-off-by: Lorenzo Bianconi Signed-off-by: Johannes Berg --- net/mac80211/tx.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index 7bb67fa9f4d2..3a7475ff1a41 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -1892,10 +1892,6 @@ netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb, info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS | IEEE80211_TX_CTL_INJECTED; - /* process and remove the injection radiotap header */ - if (!ieee80211_parse_tx_radiotap(local, skb)) - goto fail; - rcu_read_lock(); /* @@ -1957,6 +1953,11 @@ netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb, goto fail_rcu; info->band = chandef->chan->band; + + /* process and remove the injection radiotap header */ + if (!ieee80211_parse_tx_radiotap(local, skb)) + goto fail_rcu; + ieee80211_xmit(sdata, NULL, skb); rcu_read_unlock(); -- 2.20.1