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=-19.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 82B0BC43603 for ; Mon, 3 May 2021 17:07:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5346561073 for ; Mon, 3 May 2021 17:07:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235470AbhECREr (ORCPT ); Mon, 3 May 2021 13:04:47 -0400 Received: from mail.kernel.org ([198.145.29.99]:43314 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235099AbhECQzs (ORCPT ); Mon, 3 May 2021 12:55:48 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 868E76142F; Mon, 3 May 2021 16:42:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1620060180; bh=lOswd8yokzUhDq6iGB8LlKGAW5t938NIF0opdt12Too=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fveqZ00T1f22ZjDzHswxU175Nv/EWcd5EpzaMgEvKI9C2D+b4xHWYX2pqLfMrSOSK cKV56YAXW2a+tazq0AmfcTrmlmnfsQ66Y3FdY90D7OzlFijV5upWVEfCojnbdB/red 9X2X5/u0/9XIRMP4R3tkIAuj4wU8iTZ+zdCzGlGvmsUFfDLJsrowPJhzlxmbvoZLdy qwP02UGbHGZh0sN+BWdaIhDDmDMZsuik+WiwpzI0AQAdQLfEo0kwbA5ESFCjznWc31 k+6n2LkmXHT0JCEPtoDnPY6m/Ccknqv4Xkit7nDqK6tBgUjHXntLYlz/3hL9ImJ0f6 CiZV2MfwONVXA== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Hans Verkuil , syzbot+a4e309017a5f3a24c7b3@syzkaller.appspotmail.com, Mauro Carvalho Chehab , Sasha Levin , linux-media@vger.kernel.org Subject: [PATCH AUTOSEL 4.9 05/24] media: gspca/sq905.c: fix uninitialized variable Date: Mon, 3 May 2021 12:42:33 -0400 Message-Id: <20210503164252.2854487-5-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210503164252.2854487-1-sashal@kernel.org> References: <20210503164252.2854487-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore 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