From nobody Sun Feb 8 23:32:02 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DF45EEB64DD for ; Thu, 20 Jul 2023 17:47:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230282AbjGTRrA (ORCPT ); Thu, 20 Jul 2023 13:47:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42144 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229914AbjGTRq7 (ORCPT ); Thu, 20 Jul 2023 13:46:59 -0400 Received: from mail-qt1-x834.google.com (mail-qt1-x834.google.com [IPv6:2607:f8b0:4864:20::834]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E197E1726 for ; Thu, 20 Jul 2023 10:46:57 -0700 (PDT) Received: by mail-qt1-x834.google.com with SMTP id d75a77b69052e-403a72df0a6so8188261cf.2 for ; Thu, 20 Jul 2023 10:46:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1689875217; x=1690480017; h=cc:to:message-id:content-transfer-encoding:mime-version:subject :date:from:from:to:cc:subject:date:message-id:reply-to; bh=7PTH7Prt/pfWwGYiTl5+rTN2hsFZvF/29kSRnDb2688=; b=DFCv5uuhflgC21zhEPekgbavRuDkr3IVmUsh+LH26iUvYKgqWF3IcFmpU2NVi/2Y7U ae2+dUIQrv7yeUPD+oZLfZ3cf4gNh+2JNlmXJgEshBPWmVDkZQjF38ln6kDJZJf0NBP3 crXWx2U26X9slVd2QOkH7+TSHX61ylKX9p8Kw= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1689875217; x=1690480017; h=cc:to:message-id:content-transfer-encoding:mime-version:subject :date:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=7PTH7Prt/pfWwGYiTl5+rTN2hsFZvF/29kSRnDb2688=; b=l0VrHdOHvVnUhAFvLEccdzOjmPtpynRVqnh+G65bZwwgEh8ptTcpvmXaWiVHgoIM/H N+Afz4yzDBJpTPk1VK0+D9qckq4+tUM4kcJA5LB/9Ejk3DxhGYHTg3blEZQGA8VJtHZ8 F65CHzIovCzVmN0vFKJuvRRny6NA23Mg3JHCEj45dE2KpiH2wEbPKJ2V3pX/jZZDHTz9 ReKtBO1of9aEl+nePyx75Mlqd86WFG/NwFqU/h6JMs+dCBRFHP5DI5/3+oUOo9x8vP7z 78PWQRa14Qds6PzseBNcrSomzPUTbFZfWrz3MnHlaXJy+xgW6E6o1Tay5AKq2++OTe44 PUbw== X-Gm-Message-State: ABy/qLYoDgkG9X8XQDaKyjcvOeYPRrVsQS9KdTKjAwGMxwp0xPYZMqPP PYlSiBJ6gAeAzZgZ1gfrESy8+w== X-Google-Smtp-Source: APBJJlEVMo/NGK/95ZTtHbNgvmc8a1OWDJmbgcJkwnbMqn2USypsgzzjfB9WZKQzjcZfPMUWQ9sqzQ== X-Received: by 2002:a05:622a:174f:b0:403:ab02:e827 with SMTP id l15-20020a05622a174f00b00403ab02e827mr6699364qtk.62.1689875217009; Thu, 20 Jul 2023 10:46:57 -0700 (PDT) Received: from denia.c.googlers.com (122.213.145.34.bc.googleusercontent.com. [34.145.213.122]) by smtp.gmail.com with ESMTPSA id b20-20020ac85414000000b0040541a8bd66sm574379qtq.60.2023.07.20.10.46.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 20 Jul 2023 10:46:56 -0700 (PDT) From: Ricardo Ribalda Date: Thu, 20 Jul 2023 17:46:54 +0000 Subject: [PATCH v2] media: uvcvideo: Fix OOB read MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20230717-uvc-oob-v2-1-c7745a8d5847@chromium.org> X-B4-Tracking: v=1; b=H4sIAA1zuWQC/2WNwQ7CIBBEf6Xh7BqgmKon/8P0wNJt4dBiFks0T f9d6NXjm3mZ2UQiDpTEvdkEUw4pxKWAPjXCebtMBGEoLLTUrexUB2t2ECOCQanM1UppVCeKjTY RINvF+epXhckOtXoxjeFznDz7wj6kd+Tv8ZlVTf/nswIF4wVvaCzaFs3DeY5zWOdz5En0+77/A Mhoyne8AAAA To: Laurent Pinchart , Mauro Carvalho Chehab Cc: linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, Sergey Senozhatsky , stable@kernel.org, Zubin Mithra , Ricardo Ribalda X-Mailer: b4 0.12.2 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org If the index provided by the user is bigger than the mask size, we might do= an out of bound read. CC: stable@kernel.org Fixes: 40140eda661e ("media: uvcvideo: Implement mask for V4L2_CTRL_TYPE_ME= NU") Reported-by: Zubin Mithra Signed-off-by: Ricardo Ribalda Reported-by: tag. So maybe that part should be even revisited reg. the Reviewed-by: Laurent Pinchart Reviewed-by: Sergey Senozhatsky reported-by tag. --- Avoid reading index >=3D 31 --- Changes in v2: - Use BITS_PER_TYPE instead of 32 (thanks Sergey). - Add Reported-by tag. - Link to v1: https://lore.kernel.org/r/20230717-uvc-oob-v1-1-f5b9b4aba3b4@= chromium.org --- drivers/media/usb/uvc/uvc_ctrl.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_c= trl.c index 5e9d3da862dd..e59a463c2761 100644 --- a/drivers/media/usb/uvc/uvc_ctrl.c +++ b/drivers/media/usb/uvc/uvc_ctrl.c @@ -1402,6 +1402,9 @@ int uvc_query_v4l2_menu(struct uvc_video_chain *chain, query_menu->id =3D id; query_menu->index =3D index; =20 + if (index >=3D BITS_PER_TYPE(mapping->menu_mask)) + return -EINVAL; + ret =3D mutex_lock_interruptible(&chain->ctrl_mutex); if (ret < 0) return -ERESTARTSYS; --- base-commit: fdf0eaf11452d72945af31804e2a1048ee1b574c change-id: 20230717-uvc-oob-4b0148a00417 Best regards, --=20 Ricardo Ribalda