From patchwork Tue Mar 31 08:59:31 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 228704 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3692EC2D0EE for ; Tue, 31 Mar 2020 09:01:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0ABD821582 for ; Tue, 31 Mar 2020 09:01:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585645284; bh=vhGI45rn2Ty8tXWcSB2nbLy+mTD6PsHxSUVxyGrjF3c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=HZv2GZXeaLXOLx0wD2ky1q5hEj1yuUCmWcgUl+mr45CftzJGocIHEQG2M5i8jD/wY XMpGXYuz26E/P2Q2fSSck3UXx9edZyJfoDZCJRQwr3Gx/pH3TCll5aPSOOyxScd4Wt 1VmA62UUi+mLmfu0PhpyVFjf6AdoGvy5Zg9Bsk9U= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730341AbgCaJBU (ORCPT ); Tue, 31 Mar 2020 05:01:20 -0400 Received: from mail.kernel.org ([198.145.29.99]:40460 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730541AbgCaJBT (ORCPT ); Tue, 31 Mar 2020 05:01:19 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id CA82420B1F; Tue, 31 Mar 2020 09:01:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585645278; bh=vhGI45rn2Ty8tXWcSB2nbLy+mTD6PsHxSUVxyGrjF3c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fltoT55GJNsZfsyN6kV92NsZzltQVtaMKYmxNgIq1R+N//ThBirsSGCyGJohl8Oas wgVG8hJo4TlliqlPRe2gX3vv5cbWhTbdgO04y4qQhyOF53+tVio154OLyfQTyRM/kt jHlTp/7eqNtkrYRKobMODmed9HO+t8OESmcdc7wU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Hans de Goede , Johan Hovold , Hans Verkuil , Mauro Carvalho Chehab Subject: [PATCH 5.6 19/23] media: ov519: add missing endpoint sanity checks Date: Tue, 31 Mar 2020 10:59:31 +0200 Message-Id: <20200331085316.636106929@linuxfoundation.org> X-Mailer: git-send-email 2.26.0 In-Reply-To: <20200331085308.098696461@linuxfoundation.org> References: <20200331085308.098696461@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Johan Hovold commit 998912346c0da53a6dbb71fab3a138586b596b30 upstream. Make sure to check that we have at least one endpoint before accessing the endpoint array to avoid dereferencing a NULL-pointer on stream start. Note that these sanity checks are not redundant as the driver is mixing looking up altsettings by index and by number, which need not coincide. Fixes: 1876bb923c98 ("V4L/DVB (12079): gspca_ov519: add support for the ov511 bridge") Fixes: b282d87332f5 ("V4L/DVB (12080): gspca_ov519: Fix ov518+ with OV7620AE (Trust spacecam 320)") Cc: stable # 2.6.31 Cc: Hans de Goede Signed-off-by: Johan Hovold Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Greg Kroah-Hartman --- drivers/media/usb/gspca/ov519.c | 10 ++++++++++ 1 file changed, 10 insertions(+) --- a/drivers/media/usb/gspca/ov519.c +++ b/drivers/media/usb/gspca/ov519.c @@ -3477,6 +3477,11 @@ static void ov511_mode_init_regs(struct return; } + if (alt->desc.bNumEndpoints < 1) { + sd->gspca_dev.usb_err = -ENODEV; + return; + } + packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize); reg_w(sd, R51x_FIFO_PSIZE, packet_size >> 5); @@ -3603,6 +3608,11 @@ static void ov518_mode_init_regs(struct return; } + if (alt->desc.bNumEndpoints < 1) { + sd->gspca_dev.usb_err = -ENODEV; + return; + } + packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize); ov518_reg_w32(sd, R51x_FIFO_PSIZE, packet_size & ~7, 2);