From patchwork Mon Feb 3 16:19:33 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: 232083 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=-6.8 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,USER_AGENT_GIT autolearn=unavailable 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 B21F6C35247 for ; Mon, 3 Feb 2020 16:48:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 796DB2051A for ; Mon, 3 Feb 2020 16:48:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1580748519; bh=II7bm7gFnpRH7TiY1EXfjy9NpIByqTPjFSJhKZdIt90=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=XCFCYI1RKXvu2NdJNbWwIupRryFTbuUCi4f1q2p5Isy0U/g4jvF4xsXvLSX3dp38B bBctUvMV+udxrqJAv89Caadn9xj3M4dOL+e63+YKbtYymftM5Up5LMMk5GYl1flcDU 3QziZf+polqzOLR4Pn0Z91CF0Oy5HQ1ASMOKHJ4I= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728884AbgBCQ0F (ORCPT ); Mon, 3 Feb 2020 11:26:05 -0500 Received: from mail.kernel.org ([198.145.29.99]:37014 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727044AbgBCQ0E (ORCPT ); Mon, 3 Feb 2020 11:26:04 -0500 Received: from localhost (unknown [104.132.45.99]) (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 078DF2051A; Mon, 3 Feb 2020 16:26:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1580747164; bh=II7bm7gFnpRH7TiY1EXfjy9NpIByqTPjFSJhKZdIt90=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DmJimQ0LvICr47ZLMJn8J4XRhvLYrJ5zKnANBSs8FA1aobEgOQKl7gECdtGbtgFlo ZGZ+d8gJz4NmAazRmzk1BfIyCEe8EzrfMjPo6QG2qWKCyntZ/uh4siKZ2Y7qYHJMsN ccFPD2UVCyyCTNJ//G5Z0m/TxsBOuNsTDk7es1QI= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Hans Verkuil , Sean Young , Mauro Carvalho Chehab , syzbot+6bf9606ee955b646c0e1@syzkaller.appspotmail.com Subject: [PATCH 4.9 37/68] media: dvb-usb/dvb-usb-urb.c: initialize actlen to 0 Date: Mon, 3 Feb 2020 16:19:33 +0000 Message-Id: <20200203161911.059663994@linuxfoundation.org> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200203161904.705434837@linuxfoundation.org> References: <20200203161904.705434837@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: Hans Verkuil commit 569bc8d6a6a50acb5fcf07fb10b8d2d461fdbf93 upstream. This fixes a syzbot failure since actlen could be uninitialized, but it was still used. Syzbot link: https://syzkaller.appspot.com/bug?extid=6bf9606ee955b646c0e1 Reported-and-tested-by: syzbot+6bf9606ee955b646c0e1@syzkaller.appspotmail.com Signed-off-by: Hans Verkuil Acked-by: Sean Young Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Greg Kroah-Hartman --- drivers/media/usb/dvb-usb/dvb-usb-urb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/media/usb/dvb-usb/dvb-usb-urb.c +++ b/drivers/media/usb/dvb-usb/dvb-usb-urb.c @@ -11,7 +11,7 @@ int dvb_usb_generic_rw(struct dvb_usb_device *d, u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen, int delay_ms) { - int actlen,ret = -ENOMEM; + int actlen = 0, ret = -ENOMEM; if (!d || wbuf == NULL || wlen == 0) return -EINVAL;