Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7FDEAC43217 for ; Mon, 15 Nov 2021 17:50:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6955F633E8 for ; Mon, 15 Nov 2021 17:50:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239062AbhKORxU (ORCPT ); Mon, 15 Nov 2021 12:53:20 -0500 Received: from mail.kernel.org ([198.145.29.99]:50940 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237649AbhKORXm (ORCPT ); Mon, 15 Nov 2021 12:23:42 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 5FA1161131; Mon, 15 Nov 2021 17:17:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1636996645; bh=AUS9qjPSMB0ynJne36cuswM2fAWoqoUvK2knUc0sA90=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pG7U+VQx/3/oqGoN74FWKGNeAYTve9H7kOWhHwEbXZBUL2avwS+wK2Vldt/tJ9jL7 RFkLdOR5Wrns9xJ1MPeB2FspxaZZzjG6p/S4MupNgTewlJGlZXmn6dB3K3WdVnp19W Dg9FEncl+rhoD0UcYL7bUmlUKprf05OaXEvWM+bU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dan Carpenter , =?UTF-8?q?Michael=20B=C3=BCsch?= , Kalle Valo , Sasha Levin Subject: [PATCH 5.4 216/355] b43legacy: fix a lower bounds test Date: Mon, 15 Nov 2021 18:02:20 +0100 Message-Id: <20211115165320.749922845@linuxfoundation.org> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211115165313.549179499@linuxfoundation.org> References: <20211115165313.549179499@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: Dan Carpenter [ Upstream commit c1c8380b0320ab757e60ed90efc8b1992a943256 ] The problem is that "channel" is an unsigned int, when it's less 5 the value of "channel - 5" is not a negative number as one would expect but is very high positive value instead. This means that "start" becomes a very high positive value. The result of that is that we never enter the "for (i = start; i <= end; i++) {" loop. Instead of storing the result from b43legacy_radio_aci_detect() it just uses zero. Fixes: 75388acd0cd8 ("[B43LEGACY]: add mac80211-based driver for legacy BCM43xx devices") Signed-off-by: Dan Carpenter Acked-by: Michael Büsch Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20211006073542.GD8404@kili Signed-off-by: Sasha Levin --- drivers/net/wireless/broadcom/b43legacy/radio.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/wireless/broadcom/b43legacy/radio.c b/drivers/net/wireless/broadcom/b43legacy/radio.c index da40d1ca8723d..e4dce76a4481d 100644 --- a/drivers/net/wireless/broadcom/b43legacy/radio.c +++ b/drivers/net/wireless/broadcom/b43legacy/radio.c @@ -283,7 +283,7 @@ u8 b43legacy_radio_aci_scan(struct b43legacy_wldev *dev) & 0x7FFF); b43legacy_set_all_gains(dev, 3, 8, 1); - start = (channel - 5 > 0) ? channel - 5 : 1; + start = (channel > 5) ? channel - 5 : 1; end = (channel + 5 < 14) ? channel + 5 : 13; for (i = start; i <= end; i++) { -- 2.33.0