Received: by 2002:a05:6a10:206:0:0:0:0 with SMTP id 6csp2705558pxj; Mon, 10 May 2021 08:57:25 -0700 (PDT) X-Google-Smtp-Source: ABdhPJzDSfpX5wqm058EPEYZ1KYlkW1CMe9hR+bM1Ys3ow762BhDJcd3Td5DDUikcFQLugIVQInH X-Received: by 2002:a02:6c46:: with SMTP id w67mr15456773jab.41.1620662244967; Mon, 10 May 2021 08:57:24 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1620662244; cv=none; d=google.com; s=arc-20160816; b=dctnPplvqjgnhLtAkmUobSAREp68nmH7OZRN3iLXoPLraOyLeyTKN0Zgd+ax3q90Ht ASJrZxU/+M3kmANFgmDecxKuhxoo3Mkhb/gBNh0X+rK/DSErpYvnPGAKTWLeFx/SfQN9 wJjYerXNrdWrK8PhuUE4dcIv/2GdCn3EsqKvbsqvuNvb3lLW8ZpHjMhT79d9kaGZTCpV /iGSwUaBvwc2j4wIeMK0bC42zio9jxL8HVITJbTFVBOkQhl9/y3ekPmnGMzLtMqAby8s RlY5ZlMJuRNPVRdHw67MGIJkqVc+fA3AEiRFyHEBMPd6OXT37wIOKlq+Z4c4AlcismyG IDwQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :user-agent:references:in-reply-to:message-id:date:subject:cc:to :from:dkim-signature; bh=38aX+GI8E1MI+X3+l3SrO8dTCd0hyZpEWc0Pvx2B530=; b=aY8+GBf+1SvhpdQLR6lIwgszD3ptba0BB1RFlkbx+acqgKJhnVJ1scU2Jmny6R03Iq 6ta5+OrP7FZ9p2wGWr0gpGSU/TWVMrexVD9fIBOcMIh2wvmYndniEI69Au/xNjdti768 SYwwM75uQekwNwVtS753d6ALu+n3XfNyE17YIxJxSxWYtBdizQuo8usLRnZv0JFLxuFo 0CEFNZnP8pWo+Pusga2idPO+H38x0Anad5j3x9EXSc1rZ7d3UGeFP1dwhWYrUuHX9lyV h94C6RBmT9R9LkXX0Rn5srAI0J4mCe2cYjC12QP0o15QMcr992Dgzh3aEm+BnFcL+Blo jywA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linuxfoundation.org header.s=korg header.b=w1wzMQ+H; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linuxfoundation.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id j9si18004485ils.49.2021.05.10.08.57.11; Mon, 10 May 2021 08:57:24 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@linuxfoundation.org header.s=korg header.b=w1wzMQ+H; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linuxfoundation.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236224AbhEJLbX (ORCPT + 99 others); Mon, 10 May 2021 07:31:23 -0400 Received: from mail.kernel.org ([198.145.29.99]:54598 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234858AbhEJK5L (ORCPT ); Mon, 10 May 2021 06:57:11 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id C46AF61C34; Mon, 10 May 2021 10:49:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1620643799; bh=5LnsDbENCZlQF4nCWMHw2rIS0V68TkYnwy3mGlCDfCc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=w1wzMQ+HXM2zjNRFUeuh9eTWfElR+hJ3LKsevWlUl4Muw6fmet5wzOGDHCS4SI9FC DZgoL4sDITSIh2bYY1Rlx/02uJT2R/DbURqFQc16Ws2JswgDlFhIK+9IGjnwNrTCEn elbZrrQDxqF73xtkkMBTpk5Nt4fjbtdlPdueP/Hg= 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 5.11 162/342] media: gspca/sq905.c: fix uninitialized variable Date: Mon, 10 May 2021 12:19:12 +0200 Message-Id: <20210510102015.447820644@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210510102010.096403571@linuxfoundation.org> References: <20210510102010.096403571@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 97799cfb832e..949111070971 100644 --- a/drivers/media/usb/gspca/sq905.c +++ b/drivers/media/usb/gspca/sq905.c @@ -158,7 +158,7 @@ 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