From: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
To: nbd@nbd.name
Cc: linux-wireless@vger.kernel.org
Subject: [PATCH] mt76x2: fix possible NULL pointer dereferencing in mt76x2_tx()
Date: Sat, 17 Mar 2018 12:29:27 +0100 [thread overview]
Message-ID: <20180317112927.18299-1-lorenzo.bianconi@redhat.com> (raw)
Fix a theoretical NULL pointer dereferencing in mt76x2_tx routine that
can occurs for injected frames in a monitor vif since vif pointer could
be NULL for that interfaces
Fixes: 23405236460b ("mt76: fix transmission of encrypted mgmt frames")
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
---
drivers/net/wireless/mediatek/mt76/mt76x2_tx.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/mediatek/mt76/mt76x2_tx.c b/drivers/net/wireless/mediatek/mt76/mt76x2_tx.c
index 534e4bf9a34c..e46eafc4c436 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76x2_tx.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76x2_tx.c
@@ -36,9 +36,12 @@ void mt76x2_tx(struct ieee80211_hw *hw, struct ieee80211_tx_control *control,
msta = (struct mt76x2_sta *) control->sta->drv_priv;
wcid = &msta->wcid;
+ /* sw encrypted frames */
+ if (!info->control.hw_key && wcid->hw_key_idx != -1)
+ control->sta = NULL;
}
- if (vif || (!info->control.hw_key && wcid->hw_key_idx != -1)) {
+ if (vif && !control->sta) {
struct mt76x2_vif *mvif;
mvif = (struct mt76x2_vif *) vif->drv_priv;
--
2.16.2
next reply other threads:[~2018-03-17 11:29 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-17 11:29 Lorenzo Bianconi [this message]
2018-03-17 21:03 ` [PATCH] mt76x2: fix possible NULL pointer dereferencing in mt76x2_tx() Felix Fietkau
2018-03-27 9:11 ` Kalle Valo
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