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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C4CB1C433EF for ; Wed, 24 Nov 2021 12:05:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242423AbhKXMII (ORCPT ); Wed, 24 Nov 2021 07:08:08 -0500 Received: from mail.kernel.org ([198.145.29.99]:33366 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233185AbhKXMGP (ORCPT ); Wed, 24 Nov 2021 07:06:15 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id F1AA260F90; Wed, 24 Nov 2021 12:03:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1637755385; bh=i88b99ISnE/a0T9L4fAmUIOV6BjoOz67zNfpN0l1dTI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=HZoLY5YDn05c7AUviXacNZQjSi4isUYcYyeKZLzKw3cESUj39l2i8/twZt2I22ASj 1w9fW+wl/KX+G2mLgC5VX/02n0v2BYCuNEijX4Gw+Oxksa0v295J1Bts81PP+1au9K wzzKumx/USup+Dsf3q7hLUEfm0foyB94rWOv6t44= 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 4.4 076/162] b43legacy: fix a lower bounds test Date: Wed, 24 Nov 2021 12:56:19 +0100 Message-Id: <20211124115700.774894499@linuxfoundation.org> X-Mailer: git-send-email 2.34.0 In-Reply-To: <20211124115658.328640564@linuxfoundation.org> References: <20211124115658.328640564@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/b43legacy/radio.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/wireless/b43legacy/radio.c b/drivers/net/wireless/b43legacy/radio.c index 9501420340a91..5b1e8890305c1 100644 --- a/drivers/net/wireless/b43legacy/radio.c +++ b/drivers/net/wireless/b43legacy/radio.c @@ -299,7 +299,7 @@ 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