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Wed, 14 Oct 2026 10:01:32 +0800 Received: from mtksitap99.mediatek.inc (10.233.130.16) by mtkmbs11n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.2562.29 via Frontend Transport; Wed, 14 Oct 2026 10:01:32 +0800 From: Eason Lai To: , CC: , , , , , , , , , , , , Jeff Hsu Subject: [PATCH v2] wifi: mt76: mt7925: race condition in mt7925e_mac_reset allows compromised WiFi firmware to trigger host sk_buff use-after-free Date: Wed, 14 Oct 2026 10:01:26 +0800 Message-ID: <20261014020126.1479508-1-eason.lai@mediatek.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20261012032657.58631-1-eason.lai@mediatek.com> References: <20261012032657.58631-1-eason.lai@mediatek.com> Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain From: Jeff Hsu Fix racing condition in reset handler result sk_buff use-after-free Signed-off-by: Jeff Hsu --- v2: Rebase the code, due to code conflict with previous change in d12a54be2604 --- drivers/net/wireless/mediatek/mt76/mt7925/pci_mac.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/mediatek/mt76/mt7925/pci_mac.c b/drivers/net/wireless/mediatek/mt76/mt7925/pci_mac.c index 18f125bf3df4..bc8f741e9426 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7925/pci_mac.c +++ b/drivers/net/wireless/mediatek/mt76/mt7925/pci_mac.c @@ -71,12 +71,15 @@ void mt7925_tx_token_put(struct mt792x_dev *dev) int mt7925e_mac_reset(struct mt792x_dev *dev) { const struct mt792x_irq_map *irq_map = dev->irq_map; + struct mt76_phy *mphy = &dev->mt76.phy; int i, err; - err = mt792xe_mcu_drv_pmctrl(dev); + err = __mt792xe_mcu_drv_pmctrl(dev); if (err) return err; + clear_bit(MT76_STATE_PM, &mphy->state); + mt76_connac_free_pending_tx_skbs(&dev->pm, NULL); mt76_wr(dev, dev->irq_map->host_irq_enable, 0); -- 2.45.2