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=-6.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 E7CEAC282CA for ; Wed, 13 Feb 2019 18:45:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B6989222D2 for ; Wed, 13 Feb 2019 18:45:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1550083517; bh=g836qVs7FTSdQ1eq7h7ZiBcmUbHhJ5EFABGN1lOZ/EA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=JEt1F8y94GtwJ6Ft3EKLM/9z/RTaRrrIhcwUtD6t+VSzUiEfSCmSEfHRoJfU5hebt OXINZgTXZ9UGlok3utWMEcySrsUWvIZvohcqckBjNEmQkAEmYAe14O7iX8sMAG+qb6 8ogTPoE2qc6znCa19Y5Xwia84ucFHC4vOoKaYPYo= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2406207AbfBMSpQ (ORCPT ); Wed, 13 Feb 2019 13:45:16 -0500 Received: from mail.kernel.org ([198.145.29.99]:43896 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2406190AbfBMSpM (ORCPT ); Wed, 13 Feb 2019 13:45:12 -0500 Received: from localhost (5356596B.cm-6-7b.dynamic.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id AC5BA222D1; Wed, 13 Feb 2019 18:45:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1550083512; bh=g836qVs7FTSdQ1eq7h7ZiBcmUbHhJ5EFABGN1lOZ/EA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UfrKf9ASGGB+EfxER0jNaNkJhkWBJUgH9bx3oLs7aMadBXW8AR4Nr4fmRH5UQbFAP v41U5R8GvqC8dHabqSkzo9YImnQa3owyfj2qpo3LwG0FyvX8Ozu31tuCrxifj0yw8O 7qY4obBFDqaehPkE5Lr0jb+X2tM+QsMOG7w0JZr0= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Martin Kelly , Dan Carpenter , Stable@vger.kernel.org, Jonathan Cameron Subject: [PATCH 4.20 06/50] tools: iio: iio_generic_buffer: make num_loops signed Date: Wed, 13 Feb 2019 19:38:11 +0100 Message-Id: <20190213183656.291941329@linuxfoundation.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190213183655.747168774@linuxfoundation.org> References: <20190213183655.747168774@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.20-stable review patch. If anyone has any objections, please let me know. ------------------ From: Martin Kelly commit b119d3bc328e7a9574861ebe0c2110e2776c2de1 upstream. Currently, num_loops is unsigned, but it's set by strtoll, which returns a (signed) long long int. This could lead to overflow, and it also makes the check "num_loops < 0" always be false, since num_loops is unsigned. Setting num_loops to -1 to loop forever is almost working because num_loops is getting set to a very high number, but it's technically still incorrect. Fix this issue by making num_loops signed. This also fixes an error found by Smatch. Signed-off-by: Martin Kelly Reported-by: Dan Carpenter Fixes: 55dda0abcf9d ("tools: iio: iio_generic_buffer: allow continuous looping") Cc: Signed-off-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- tools/iio/iio_generic_buffer.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/tools/iio/iio_generic_buffer.c +++ b/tools/iio/iio_generic_buffer.c @@ -330,7 +330,7 @@ static const struct option longopts[] = int main(int argc, char **argv) { - unsigned long long num_loops = 2; + long long num_loops = 2; unsigned long timedelay = 1000000; unsigned long buf_len = 128;