diff mbox series

mt76: mt7615: fix potential overflow on large shift

Message ID 7fdbfede8bdc09d8099d1a812c2434e0511980ce.1619043422.git.ryder.lee@mediatek.com (mailing list archive)
State New, archived
Headers show
Series mt76: mt7615: fix potential overflow on large shift | expand

Commit Message

Ryder Lee April 21, 2021, 10:20 p.m. UTC 
Fix the following static checker warning:
error: undefined (user controlled) shift '(((1))) << (c->omac_idx)'

Fixes: 402a695b1ae6 ("mt76: mt7615: fix CSA notification for DBDC")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
---
 drivers/net/wireless/mediatek/mt76/mt7615/mcu.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7615/mcu.c
index 67af2e2d4779..93d938d56166 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/mcu.c
@@ -390,6 +390,9 @@  mt7615_mcu_rx_csa_notify(struct mt7615_dev *dev, struct sk_buff *skb)
 
 	c = (struct mt7615_mcu_csa_notify *)skb->data;
 
+	if (c->omac_idx > EXT_BSSID_MAX)
+		return;
+
 	if (ext_phy && ext_phy->omac_mask & BIT_ULL(c->omac_idx))
 		mphy = dev->mt76.phy2;