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=-9.2 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 C0803C04EBF for ; Tue, 16 Oct 2018 04:12:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 80E7A21476 for ; Tue, 16 Oct 2018 04:12:49 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="vLm44UsL" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 80E7A21476 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org 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 S1727876AbeJPMBJ (ORCPT ); Tue, 16 Oct 2018 08:01:09 -0400 Received: from mail.kernel.org ([198.145.29.99]:47960 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727858AbeJPMBI (ORCPT ); Tue, 16 Oct 2018 08:01:08 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 1E4C221471; Tue, 16 Oct 2018 04:12:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1539663166; bh=omdctG6B3LnyGG9Ymio0IMTrRLoqIx7v+PxQvXABDYc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=vLm44UsLYlF2jqfFLxD6EVEGJh4T0MUUNd4wi/oQEzC5BdBXgma7oaoo4gmAHj0n4 8GFOVNxs3Z/Xkg+iBGR8fpsBJDBNUYDmOWLx9yHVoOvta4DeyAxTTcdM38Prr4X8mm +rTk3PrPygqhFK0QD9d2Ij6MnhEbH8INyPeDUabg= From: Sasha Levin To: stable@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Masashi Honma , Johannes Berg , Sasha Levin Subject: [PATCH AUTOSEL 4.18 024/100] nl80211: Fix possible Spectre-v1 for NL80211_TXRATE_HT Date: Tue, 16 Oct 2018 00:11:05 -0400 Message-Id: <20181016041221.135528-24-sashal@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181016041221.135528-1-sashal@kernel.org> References: <20181016041221.135528-1-sashal@kernel.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Masashi Honma [ Upstream commit 30fe6d50eb088783c8729c7d930f65296b2b3fa7 ] Use array_index_nospec() to sanitize ridx with respect to speculation. Signed-off-by: Masashi Honma Signed-off-by: Johannes Berg Signed-off-by: Sasha Levin --- net/wireless/nl80211.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 733ccf867972..3b80cf012438 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -3699,6 +3699,7 @@ static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband, return false; /* check availability */ + ridx = array_index_nospec(ridx, IEEE80211_HT_MCS_MASK_LEN); if (sband->ht_cap.mcs.rx_mask[ridx] & rbit) mcs[ridx] |= rbit; else -- 2.17.1