From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D23AA34E744 for ; Fri, 4 Sep 2026 04:49:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788497344; cv=none; b=hY87awJatVmMCpSHsAgcK0c0SWDl5fcxYYnjVzLVlIbvGH243MSxE6KQDf/3alLzc6dF1mOqZcKfQPWegxzylDU59t1zjlqoIXmqGqDvLxs8FSHI7BoZigwRjDrj8w1pz6xH8z9WDDxkrsCbLlosvVpZZAxdYdxxHt+mk+J7RT4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788497344; c=relaxed/simple; bh=5NoZtRvFCaVUYPHAfCthtpQB937PppOKZsc3Q8McnVo=; h=Subject:To:Cc:From:Date:Message-ID:MIME-Version:Content-Type; b=ebAKG0arbvR9rNJpUYxy9iOzJjaPUVV8gEpFCSTrDetm73pyczkOXdVe5tdOQghcQPU+l/r1NeOwzONmXqXxmZVV/xO+Vight8KpfRaxf1MYsHfjivLD6gzqJVY64Vt78o8ggGaTNJQHpR1Ol4uhbpzAx7I8CdbY2T6cEs6tE5U= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=xDMBQXR1; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="xDMBQXR1" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1C9DD1F00A3D; Fri, 4 Sep 2026 04:49:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1788497342; bh=ZecWd3ndIy+4zMAmk4szenTnRniG6HdeQl37Lz1w77g=; h=Subject:To:Cc:From:Date; b=xDMBQXR1FycGKnlDsF5P2y1mq55EX5HCZ5f3lZa/r/KN5nxBRu+pyqxDP1w+kvWRp RvJsh0a1yCcMmu5//dIjc6VTXFzMi0Hj9LEHuKiLQgPRFHyblgVEQTq45f0GQKDg8s 8K3bpzRz5xJej4qtN3o7ik/2th/K/NUo1yytnHJU= Subject: FAILED: patch "[PATCH] wifi: mt76: mt7915: bound the device EEPROM address before" failed to apply to 6.12-stable tree To: hexlabsecurity@proton.me,nbd@nbd.name Cc: From: Date: Fri, 04 Sep 2026 06:48:57 +0200 Message-ID: <2026090457-perpetual-gallstone-572d@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit The patch below does not apply to the 6.12-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.12.y git checkout FETCH_HEAD git cherry-pick -x 44b5adfe49499f53002737f5fe81d608c08122fc # git commit -s git send-email --to '' --in-reply-to '2026090457-perpetual-gallstone-572d@gregkh' --subject-prefix 'PATCH 6.12.y' 'HEAD^..' Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 44b5adfe49499f53002737f5fe81d608c08122fc Mon Sep 17 00:00:00 2001 From: Bryam Vargas Date: Thu, 25 Jun 2026 07:10:26 -0500 Subject: [PATCH] wifi: mt76: mt7915: bound the device EEPROM address before the EFUSE copy mt7915_mcu_get_eeprom() copies a fixed EFUSE block into the driver's dev->mt76.eeprom.data buffer at the offset reported by the MCU response (res->addr, a device-controlled __le32) without checking it against the buffer size. A malicious or malfunctioning device can report an arbitrary address and drive a 16-byte out-of-bounds write past eeprom.data. Reject a response whose address would place the copy outside eeprom.data before deriving the destination pointer. Devices that echo the requested in-bounds offset are unaffected. Fixes: e57b7901469f ("mt76: add mac80211 driver for MT7915 PCIe-based chipsets") Cc: stable@vger.kernel.org Signed-off-by: Bryam Vargas Link: https://patch.msgid.link/20260625-b4-disp-16f99062-v1-1-aee52ecf61b9@proton.me Signed-off-by: Felix Fietkau diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c index e8fe86f93309..bbb2fedacb25 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c +++ b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c @@ -2917,8 +2917,15 @@ int mt7915_mcu_get_eeprom(struct mt7915_dev *dev, u32 offset, u8 *read_buf) return ret; res = (struct mt7915_mcu_eeprom_info *)skb->data; - if (!buf) - buf = dev->mt76.eeprom.data + le32_to_cpu(res->addr); + if (!buf) { + u32 addr = le32_to_cpu(res->addr); + + if (addr > dev->mt76.eeprom.size - MT7915_EEPROM_BLOCK_SIZE) { + dev_kfree_skb(skb); + return -EINVAL; + } + buf = dev->mt76.eeprom.data + addr; + } memcpy(buf, res->data, MT7915_EEPROM_BLOCK_SIZE); dev_kfree_skb(skb);