Received: by 2002:a05:6a10:206:0:0:0:0 with SMTP id 6csp2543036pxj; Mon, 10 May 2021 05:34:06 -0700 (PDT) X-Google-Smtp-Source: ABdhPJycRneMoM6UWA/kn5DzsYxacAWyv9Y3DkW3CjKouxgdniZ/6tqez83MBiIkJu8jwFQiqsqZ X-Received: by 2002:a05:6402:3488:: with SMTP id v8mr28540928edc.51.1620650046038; Mon, 10 May 2021 05:34:06 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1620650046; cv=none; d=google.com; s=arc-20160816; b=hTpdGInY9qksw+Xtsu5ngyRIjD1OO5Zmgm4YWH0pcp/63Hz9cZMUCsh9SSyH8P1fw3 V3/xkd+wZQch4fyCKkUk54rxIv2ipIarFDL4PwtP6O9kubk9/COr8wt0+AwUWj2Fxtsa DXhIVUCq211rYIusImTREXESyqSCG/mqFTLm0UzgF5ad7sXHag5up1x/VtfdFPJX/qKA s1CfiF+vIUuZSpX/jN3SIhO5B1Tzygz8/XTqT7Jdc2LxUBBYt4rMDxfXSP0FGP2tSy5k hEdPGbf9n2z5c9Zgz/XBhXZ9yuZu4s4KrS0F3sMypEDUD8/XrUR+46py6R0GpnCfWli1 m01A== 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=WdjlF4JNOzVR4fzlU1NitfHXk1DjRyBbYmMqQC+qPJovpjAIbn/3VoAe7Nr1ZsDWZ0 jjE+QogKxZUeLsHCLL0iQgCPg2bk815p3SbclAY9OEHkzkdcQgAKL6O4IHjwVOp5MqxD JS+ChpXjik0GtbJpolKCO/dSm6S1MuszP3/eqhvGbZFMxtbtOyq0+lNstm4yZ46129xK b7Mj9KZ1JAG8mtv2HEEScEd7eIXQAAMWeSEnPQsR8v5+gTWVV6QBpthWVPtCnbGAcx20 bYrzUiGGmbfEpZvWPZ4dZHaxpr9sKz501boLvKMsP8GxL3voef08T4JadALT+Ouwwx7I gKDg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linuxfoundation.org header.s=korg header.b=lYktaXjf; 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 m18si12423543edc.151.2021.05.10.05.33.19; Mon, 10 May 2021 05:34:06 -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=lYktaXjf; 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 S240002AbhEJMT0 (ORCPT + 99 others); Mon, 10 May 2021 08:19:26 -0400 Received: from mail.kernel.org ([198.145.29.99]:46276 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234224AbhEJLJG (ORCPT ); Mon, 10 May 2021 07:09:06 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 389156191C; Mon, 10 May 2021 11:04:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1620644680; bh=5LnsDbENCZlQF4nCWMHw2rIS0V68TkYnwy3mGlCDfCc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=lYktaXjfAlu+Vf7Hol801vInbVBqwEV8EH/fqLCP3hYDBTZMh1fmuDBdGEJsJrYPE vAVixlI00M01srbitqmNbtOS06pPW/XkRN/NDRujyPxn4GYjNW7uu1+Qb64u/f8O5J xqtfrxUpsekvs7vUg12NA53cQpEBuPvt2gLsu7tY= 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 5.12 179/384] media: gspca/sq905.c: fix uninitialized variable Date: Mon, 10 May 2021 12:19:28 +0200 Message-Id: <20210510102020.791047814@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210510102014.849075526@linuxfoundation.org> References: <20210510102014.849075526@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