Received: by 2002:a05:6a10:206:0:0:0:0 with SMTP id 6csp2459703pxj; Mon, 10 May 2021 03:35:55 -0700 (PDT) X-Google-Smtp-Source: ABdhPJyopUpnKomueIzyKz9SsmCG3G1lRMeqqNy236ie0d7BNdQOEW+EoVWwioaEWPY99dC1Mxar X-Received: by 2002:a17:906:d969:: with SMTP id rp9mr25323158ejb.516.1620642955031; Mon, 10 May 2021 03:35:55 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1620642955; cv=none; d=google.com; s=arc-20160816; b=YX8L0l7nlGCG/KXoQXzRcna4ArXKqaTlNDurSc72tR1ne3tuuBf4+L0/kiYZF50VQq svL3TkG5/koMFCUfxrLMD9WGdwE+xOSrqh17KNfQwNCVSnrTRetrySufj9SOgEs7Kzvo U0TBiAxmGR4h/loluS6Tc/7M47wR20oVQ+bU4PMfzyAn4MPqdyD4aab23tp1DzttPluq PVRaTcrELOOC4X9Z4A0AhEruPMRNA+2RBwREmh23LEUqQ5IyI02KRfTWCb9bfvIhv5M8 ml5TaEyVdsIC5MX7j7ta0XtXkI/KqgJsbpGacV46joQwJ99EXB/B3AhS9yluRcqlnz0Y r8Ww== 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=q4aaPRNYk2HaAPlCHVNNpOlBCSy3IU4cGvgg4LPJx5E=; b=CkwWNBZGWEaTN/x57CuF3L03hDDut5H0KpK16r6Pv3+32vhF3c05TxraR49oJ679rk We+7j34s2cntkRNU2QIEyTsZ3bDdiJCs/UVI3Iiaj71hHbIgArZqCKart2Mu+JhyHbKZ 9Lzf+kUubp8pW11u6akCSTkIEMU9UdfpxJJxvoap6UOZKCr4PfIPeb96Wg4NoDIeYGZJ 5JIJ4FY/pNEsi/ChtVRqbq/6iMT+UrFCWjEw+rB1LZYhF1SAXWnHS9ZcFGvBE4dMtbGq cEF2YXxLfb1ALqPpxoXkfpvg0+/0lmAmguiaWDTBSPJGHwFe2bCtW8xIIVdmxx2dOfnU gnNQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linuxfoundation.org header.s=korg header.b="q/2YqeBS"; 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 x11si13830486edd.384.2021.05.10.03.35.31; Mon, 10 May 2021 03:35:55 -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="q/2YqeBS"; 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 S232002AbhEJKcG (ORCPT + 99 others); Mon, 10 May 2021 06:32:06 -0400 Received: from mail.kernel.org ([198.145.29.99]:60482 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231246AbhEJK2p (ORCPT ); Mon, 10 May 2021 06:28:45 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 4FFAF61480; Mon, 10 May 2021 10:27:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1620642432; bh=M2yy5HQnXYbWqsz1ytJ+MQ4Sp7heKFmPYws9s2g83es=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=q/2YqeBSDJRPUO1vA9DvgYjjLoYZynXB3xQz5R5sEMLGUcbGNccdoxyr9hhZ3Xro1 /ckKqlNkKoaPM2Ine29vnlH26SaJeEdmnC6xEZD+r6mYclQ8nbsgHSyFVKIkAb7zAz tG8p+8fuo8uqSpRpE4PmWBt3gT3uW9xBLfl5Af7s= 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 5.4 085/184] media: gspca/sq905.c: fix uninitialized variable Date: Mon, 10 May 2021 12:19:39 +0200 Message-Id: <20210510101952.965380220@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210510101950.200777181@linuxfoundation.org> References: <20210510101950.200777181@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 863c485f4275..65a74060986a 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