From mboxrd@z Thu Jan 1 00:00:00 1970 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=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,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 68AB2C43462 for ; Thu, 20 May 2021 11:28:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3516E613B9 for ; Thu, 20 May 2021 11:28:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241801AbhETL3W (ORCPT ); Thu, 20 May 2021 07:29:22 -0400 Received: from mail.kernel.org ([198.145.29.99]:55136 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240247AbhETLJd (ORCPT ); Thu, 20 May 2021 07:09:33 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id BB6CB60FF0; Thu, 20 May 2021 10:06:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1621505201; bh=lOswd8yokzUhDq6iGB8LlKGAW5t938NIF0opdt12Too=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mUyoRZeDWyZZkWfzcDE8ytcEYn9M1eqeyzwEubNDFz1+cBUBueDQ7KcEhaLwUKAHg b5nsR+SBk18pWM0A/8Q9pWrSBtDMkTLMzNS0DtD/M+b+G49YBvDvpLbMAFYsgG5iiF /tkbzpFCNyHiI3sjscwBdXTvUN1J21+l3dYmZEBA= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Hans Verkuil , syzbot+a4e309017a5f3a24c7b3@syzkaller.appspotmail.com, Mauro Carvalho Chehab , Sasha Levin Subject: [PATCH 4.4 027/190] media: gspca/sq905.c: fix uninitialized variable Date: Thu, 20 May 2021 11:21:31 +0200 Message-Id: <20210520092103.071206546@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210520092102.149300807@linuxfoundation.org> References: <20210520092102.149300807@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Hans Verkuil [ Upstream commit eaaea4681984c79d2b2b160387b297477f0c1aab ] act_len can be uninitialized if usb_bulk_msg() returns an error. Set it to 0 to avoid a KMSAN error. Signed-off-by: Hans Verkuil Reported-by: syzbot+a4e309017a5f3a24c7b3@syzkaller.appspotmail.com Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Sasha Levin --- drivers/media/usb/gspca/sq905.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/media/usb/gspca/sq905.c b/drivers/media/usb/gspca/sq905.c index a7ae0ec9fa91..03322d2b2e82 100644 --- a/drivers/media/usb/gspca/sq905.c +++ b/drivers/media/usb/gspca/sq905.c @@ -172,7 +172,7 @@ static int sq905_read_data(struct gspca_dev *gspca_dev, u8 *data, int size, int need_lock) { int ret; - int act_len; + int act_len = 0; gspca_dev->usb_buf[0] = '\0'; if (need_lock) -- 2.30.2