From: Qasim Ijaz <qasdev00@gmail.com>
To: nbd@nbd.name, lorenzo@kernel.org, ryder.lee@mediatek.com,
shayne.chen@mediatek.com, sean.wang@mediatek.com,
matthias.bgg@gmail.com, angelogioacchino.delregno@collabora.com,
chui-hao.chiu@mediatek.com, Bo.Jiao@mediatek.com
Cc: linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org
Subject: [PATCH] wifi: mt76: mt7996: avoid NULL pointer dereference in mt7996_set_monitor()
Date: Sat, 22 Mar 2025 10:50:52 +0000 [thread overview]
Message-ID: <20250322105052.19136-1-qasdev00@gmail.com> (raw)
The function mt7996_set_monitor() dereferences phy before
the NULL sanity check.
Fix this to avoid NULL pointer dereference by moving the
dereference after the check.
Fixes: 69d54ce7491d ("wifi: mt76: mt7996: switch to single multi-radio wiphy")
Signed-off-by: Qasim Ijaz <qasdev00@gmail.com>
---
drivers/net/wireless/mediatek/mt76/mt7996/main.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7996/main.c b/drivers/net/wireless/mediatek/mt76/mt7996/main.c
index 91c64e3a0860..66575698aef1 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7996/main.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7996/main.c
@@ -414,11 +414,13 @@ static void mt7996_phy_set_rxfilter(struct mt7996_phy *phy)
static void mt7996_set_monitor(struct mt7996_phy *phy, bool enabled)
{
- struct mt7996_dev *dev = phy->dev;
+ struct mt7996_dev *dev;
if (!phy)
return;
+ dev = phy->dev;
+
if (enabled == !(phy->rxfilter & MT_WF_RFCR_DROP_OTHER_UC))
return;
--
2.39.5
next reply other threads:[~2025-03-22 10:52 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-03-22 10:50 Qasim Ijaz [this message]
2025-03-22 13:40 ` [PATCH] wifi: mt76: mt7996: avoid NULL pointer dereference in mt7996_set_monitor() Markus Elfring
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