From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 628F914282 for ; Mon, 23 Oct 2023 11:17:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="wyJY/fpP" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D282DC433C8; Mon, 23 Oct 2023 11:17:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1698059849; bh=/IypVgfUYl6H8DxtUdJkXDMAoH3Yj9ys0vBTgLeswPY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=wyJY/fpPpUaFkspztRGHVWMDvbtJO4k4aDEeQeQWUSeaufPMBh+SU1/2N2fYAvP6A tEVDXSiST7a7cSb1U45/Lnon6QbyNDktfeJEIYcpwYtw7T25jKi0K7z1KHgYiXyox3 HkjUfLU9ZVrsFX/Ywor6nPKi7pTiON6gCXyyDz/o= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Ma Ke , Jiri Kosina , Sasha Levin Subject: [PATCH 4.19 74/98] HID: holtek: fix slab-out-of-bounds Write in holtek_kbd_input_event Date: Mon, 23 Oct 2023 12:57:03 +0200 Message-ID: <20231023104816.183858731@linuxfoundation.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231023104813.580375891@linuxfoundation.org> References: <20231023104813.580375891@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 4.19-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ma Ke [ Upstream commit ffe3b7837a2bb421df84d0177481db9f52c93a71 ] There is a slab-out-of-bounds Write bug in hid-holtek-kbd driver. The problem is the driver assumes the device must have an input but some malicious devices violate this assumption. Fix this by checking hid_device's input is non-empty before its usage. Signed-off-by: Ma Ke Signed-off-by: Jiri Kosina Signed-off-by: Sasha Levin --- drivers/hid/hid-holtek-kbd.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/hid/hid-holtek-kbd.c b/drivers/hid/hid-holtek-kbd.c index 2f8eb66397444..72788ca260e08 100644 --- a/drivers/hid/hid-holtek-kbd.c +++ b/drivers/hid/hid-holtek-kbd.c @@ -133,6 +133,10 @@ static int holtek_kbd_input_event(struct input_dev *dev, unsigned int type, return -ENODEV; boot_hid = usb_get_intfdata(boot_interface); + if (list_empty(&boot_hid->inputs)) { + hid_err(hid, "no inputs found\n"); + return -ENODEV; + } boot_hid_input = list_first_entry(&boot_hid->inputs, struct hid_input, list); -- 2.40.1