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=-12.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,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 B11B9C64E69 for ; Tue, 27 Oct 2020 16:06:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 69D9622258 for ; Tue, 27 Oct 2020 16:06:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603814799; bh=f3mIBaTX5UcmzkqFWcYCbEA40V1tAclHvuZfTWZ31vQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=O6QxRQqBFn8xzZR5xVprdmqNLDmBqGt++j1zqoijWnfkGQUDb+Wp723W4GaeDTi3m xYChGrQIjtdQjXkBvHqK97zXZ98ClslR/06q/grHiaTpjCIGSjV/uPGENz93nL8/p9 lVMzmK8a99Ih3Yab4cNaZ4z51NchHXbh084Fw0JE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1806563AbgJ0QGO (ORCPT ); Tue, 27 Oct 2020 12:06:14 -0400 Received: from mail.kernel.org ([198.145.29.99]:53610 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1803044AbgJ0PwG (ORCPT ); Tue, 27 Oct 2020 11:52:06 -0400 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (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 A36F12225E; Tue, 27 Oct 2020 15:52:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603813924; bh=f3mIBaTX5UcmzkqFWcYCbEA40V1tAclHvuZfTWZ31vQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=auJLwNiYGDZhGJK6DqtgBohBVLPnE7Jyq/qaHp4jU+cPy1WyymlCbXSlWqMBcGGdQ N0QPIE5yNOzY1D6DhsEdguSjLGPckUU2ubR4x2XYR48iG761O3NvNlEZ8fye2Qx2Ww pFtkElE8Ir2Fsopv+Zf0vWWzx14S+cz3oLIcdLuM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Thomas Pedersen , Johannes Berg , Sasha Levin Subject: [PATCH 5.9 675/757] mac80211: handle lack of sband->bitrates in rates Date: Tue, 27 Oct 2020 14:55:25 +0100 Message-Id: <20201027135522.195991411@linuxfoundation.org> X-Mailer: git-send-email 2.29.1 In-Reply-To: <20201027135450.497324313@linuxfoundation.org> References: <20201027135450.497324313@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: Thomas Pedersen [ Upstream commit 8b783d104e7f40684333d2ec155fac39219beb2f ] Even though a driver or mac80211 shouldn't produce a legacy bitrate if sband->bitrates doesn't exist, don't crash if that is the case either. This fixes a kernel panic if station dump is run before last_rate can be updated with a data frame when sband->bitrates is missing (eg. in S1G bands). Signed-off-by: Thomas Pedersen Link: https://lore.kernel.org/r/20201005164522.18069-1-thomas@adapt-ip.com Signed-off-by: Johannes Berg Signed-off-by: Sasha Levin --- net/mac80211/cfg.c | 3 ++- net/mac80211/sta_info.c | 4 ++++ 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index 87fddd84c621e..82d516d117385 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -709,7 +709,8 @@ void sta_set_rate_info_tx(struct sta_info *sta, u16 brate; sband = ieee80211_get_sband(sta->sdata); - if (sband) { + WARN_ON_ONCE(sband && !sband->bitrates); + if (sband && sband->bitrates) { brate = sband->bitrates[rate->idx].bitrate; rinfo->legacy = DIV_ROUND_UP(brate, 1 << shift); } diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c index f2840d1d95cfb..fb4f2b9b294f0 100644 --- a/net/mac80211/sta_info.c +++ b/net/mac80211/sta_info.c @@ -2122,6 +2122,10 @@ static void sta_stats_decode_rate(struct ieee80211_local *local, u32 rate, int rate_idx = STA_STATS_GET(LEGACY_IDX, rate); sband = local->hw.wiphy->bands[band]; + + if (WARN_ON_ONCE(!sband->bitrates)) + break; + brate = sband->bitrates[rate_idx].bitrate; if (rinfo->bw == RATE_INFO_BW_5) shift = 2; -- 2.25.1