From nobody Sat Feb 7 10:12:05 2026 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 ECED6C6FA82 for ; Tue, 13 Sep 2022 15:23:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236050AbiIMPXL (ORCPT ); Tue, 13 Sep 2022 11:23:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45144 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235950AbiIMPWT (ORCPT ); Tue, 13 Sep 2022 11:22:19 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A61267B78B; Tue, 13 Sep 2022 07:36:30 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 15426614E0; Tue, 13 Sep 2022 14:34:44 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2185EC433C1; Tue, 13 Sep 2022 14:34:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1663079683; bh=rV+n4kd+7BD+xatHr5rme8y5xnzaeFBry0keN3r8Rlo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=z5jgMslu3EH8ymxaAZWvaZZYdElf/C/s5kAiNpwr+jS+2GIAnn1gZ9G/bb6q+tNDb 98wbn3xjyEaSzJwudjnUkapGrDNT7YylHIO/0AS4/slpe9Y8Eh1nrlnM8pHhULLmv/ Pkrxijs5r4Z7at03bAzyGGZkogdbkio40celAgI0= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Stanislaw Gruszka , Kalle Valo Subject: [PATCH 4.14 35/61] wifi: iwlegacy: 4965: corrected fix for potential off-by-one overflow in il4965_rs_fill_link_cmd() Date: Tue, 13 Sep 2022 16:07:37 +0200 Message-Id: <20220913140348.244519936@linuxfoundation.org> X-Mailer: git-send-email 2.37.3 In-Reply-To: <20220913140346.422813036@linuxfoundation.org> References: <20220913140346.422813036@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Stanislaw Gruszka commit 6d0ef7241553f3553a0a2764c69b07892705924c upstream. This reverts commit a8eb8e6f7159c7c20c0ddac428bde3d110890aa7 as it can cause invalid link quality command sent to the firmware and address the off-by-one issue by fixing condition of while loop. Cc: stable@vger.kernel.org Fixes: a8eb8e6f7159 ("wifi: iwlegacy: 4965: fix potential off-by-one overfl= ow in il4965_rs_fill_link_cmd()") Signed-off-by: Stanislaw Gruszka Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20220815073737.GA999388@wp.pl Signed-off-by: Greg Kroah-Hartman --- drivers/net/wireless/intel/iwlegacy/4965-rs.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) --- a/drivers/net/wireless/intel/iwlegacy/4965-rs.c +++ b/drivers/net/wireless/intel/iwlegacy/4965-rs.c @@ -2424,7 +2424,7 @@ il4965_rs_fill_link_cmd(struct il_priv * /* Repeat initial/next rate. * For legacy IL_NUMBER_TRY =3D=3D 1, this loop will not execute. * For HT IL_HT_NUMBER_TRY =3D=3D 3, this executes twice. */ - while (repeat_rate > 0) { + while (repeat_rate > 0 && idx < (LINK_QUAL_MAX_RETRY_NUM - 1)) { if (is_legacy(tbl_type.lq_type)) { if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) ant_toggle_cnt++; @@ -2443,8 +2443,6 @@ il4965_rs_fill_link_cmd(struct il_priv * cpu_to_le32(new_rate); repeat_rate--; idx++; - if (idx >=3D LINK_QUAL_MAX_RETRY_NUM) - goto out; } =20 il4965_rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, @@ -2489,7 +2487,6 @@ il4965_rs_fill_link_cmd(struct il_priv * repeat_rate--; } =20 -out: lq_cmd->agg_params.agg_frame_cnt_limit =3D LINK_QUAL_AGG_FRAME_LIMIT_DEF; lq_cmd->agg_params.agg_dis_start_th =3D LINK_QUAL_AGG_DISABLE_START_DEF;