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=-0.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS 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 AF0E1C5CFC1 for ; Sun, 17 Jun 2018 10:34:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 575F720693 for ; Sun, 17 Jun 2018 10:34:23 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=agner.ch header.i=@agner.ch header.b="v3Pfky/w" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 575F720693 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=agner.ch Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754330AbeFQKeV (ORCPT ); Sun, 17 Jun 2018 06:34:21 -0400 Received: from mail.kmu-office.ch ([178.209.48.109]:44294 "EHLO mail.kmu-office.ch" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753976AbeFQKeT (ORCPT ); Sun, 17 Jun 2018 06:34:19 -0400 Received: from trochilidae.lan (unknown [37.17.239.3]) by mail.kmu-office.ch (Postfix) with ESMTPSA id 955935C019E; Sun, 17 Jun 2018 12:34:17 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=agner.ch; s=dkim; t=1529231657; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:content-type:content-transfer-encoding: in-reply-to:references; bh=TKu9k3pkXk/ER6SiHJYzujn4jQk3e1WECqrw3PwNOsM=; b=v3Pfky/w1IxwLR6DUZjKow5qFISLwS21Fp4Gz1YHF/+KZnmLdIU5y7TxXdvBuyl+jz7jwc uUEJlwzJqCvQfD61WHfrerRXEC+GtG6cm5iQ5BLL9+H8dfgOh9I0AQlOWfkhK+G0S7VrNf uSDhAMVxm2xnbPHY2yhasO7mJxK7du4= From: Stefan Agner To: Kalle Valo Cc: Stefan Agner , Tobias Regnery , Arend van Spriel , Franky Lin , Hante Meuleman , Chi-Hsien Lin , Wright Feng , "David S. Miller" , linux-wireless@vger.kernel.org, brcm80211-dev-list.pdl@broadcom.com, brcm80211-dev-list@cypress.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] brcm80211: fix wrap around in conversion from constant to s16 Date: Sun, 17 Jun 2018 12:33:50 +0200 Message-Id: <20180617103407.27819-1-stefan@agner.ch> X-Mailer: git-send-email 2.17.1 X-Spamd-Result: default: False [-2.10 / 15.00]; TO_MATCH_ENVRCPT_ALL(0.00)[]; RCPT_COUNT_TWELVE(0.00)[14]; BAYES_HAM(-3.00)[100.00%]; TAGGED_RCPT(0.00)[]; MIME_GOOD(-0.10)[text/plain]; FROM_HAS_DN(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; DKIM_SIGNED(0.00)[]; TO_DN_SOME(0.00)[]; RCVD_COUNT_ZERO(0.00)[0]; MID_CONTAINS_FROM(1.00)[]; ASN(0.00)[asn:13030, ipnet:37.17.238.0/23, country:CH]; RCVD_TLS_ALL(0.00)[]; ARC_NA(0.00)[] Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The last value in the log_table wraps around to a negative value since s16 has a value range of -32768 to 32767. This is not what the table intends to represent. Use the closest positive value 32767. This fixes a warning seen with clang: drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_qmath.c:216:2: warning: implicit conversion from 'int' to 's16' (aka 'short') changes value from 32768 to -32768 [-Wconstant-conversion] 32768 ^~~~~ 1 warning generated. Fixes: 4c0bfeaae9f9 ("brcmsmac: fix array out-of-bounds access in qm_log10") Cc: Tobias Regnery Signed-off-by: Stefan Agner --- .../net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_qmath.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_qmath.c b/drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_qmath.c index b9672da24a9d..b24bc57ca91b 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_qmath.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_qmath.c @@ -213,7 +213,7 @@ static const s16 log_table[] = { 30498, 31267, 32024, - 32768 + 32767 }; #define LOG_TABLE_SIZE 32 /* log_table size */ -- 2.17.1