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=-5.3 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 B5187C3A5A6 for ; Thu, 19 Sep 2019 13:39:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 86DDF21D6C for ; Thu, 19 Sep 2019 13:39:49 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="Fw9B1HpS" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390493AbfISNjs (ORCPT ); Thu, 19 Sep 2019 09:39:48 -0400 Received: from mail-lj1-f195.google.com ([209.85.208.195]:46978 "EHLO mail-lj1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389222AbfISNjs (ORCPT ); Thu, 19 Sep 2019 09:39:48 -0400 Received: by mail-lj1-f195.google.com with SMTP id e17so3585355ljf.13 for ; Thu, 19 Sep 2019 06:39:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:mime-version:content-disposition :user-agent; bh=ljddPlLbugzgQnvA3trD4zHMH/BICWFfII8G370j0MY=; b=Fw9B1HpSbGNYHCU5OzIy+QofrJE+uWtt0F4VJpA/g+9lujIV60Wy+x8sKiCtgFnu1w 8hxaOb4w5415jl9aMpEHjHCtlOPBN5EzhBwfXTNBv+NJBZfDGamcSpfT3g9Q4qkqy1Gh LJWmlw9DJqn2iHiF0gEO8E65RR9VWobwdDK9fsaq0vbCI4XItUuHVLDQo28HFHzR20wS CrvER5n/oa5TcIyVjFMsblbzeiPmPtW+9w+i10PHK7Ukxd3AcXWi1FvRNLTtPP235w8/ 9cC/t+NOSgQZwHfgnFSVurSvd5mPy+4pfwzYgTKVCNoCz/fhNMXsrLk0cVbzXdYVvzLm gFYA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:mime-version :content-disposition:user-agent; bh=ljddPlLbugzgQnvA3trD4zHMH/BICWFfII8G370j0MY=; b=kp9QNOJ8Rw6CQdd+3DsrsIDYkCo+LlFSuJrysDmVES8U0Ud5tfLgSaTQSo/FpE0DJh Z8BaPWwNZO2OACY6Vb5dK8PD5UkJUgH3XmNkh0HC5zKZ9917qVxBawcKQ14LwTw4OCVI H9+YBxnQGxl/pHCbh+6yRMbZD290YMsc74rViqO0HOrtn5FRacrQuF6Zlq/CWaNsas57 dMF2Revhp13uGOc1dhkRL88mrYTY9R4B6QpCFTQe0bAw38+9bvPgnfGg/mMKkKsSBFsV nVGBzuYtZXuNqTHlN9LR729wVTTzlnvOBdheh399XwGwwhYDIVEtGluI4/y4/dUwMLhT NR6Q== X-Gm-Message-State: APjAAAUGUqAh+dyXcpqJFdhHJHsyFxCU3fgXHjXDXK0jqZPiA9zoAvuk jF+g9OwpZlf2ru8x3uTbHJM= X-Google-Smtp-Source: APXvYqxqDzTP+yc5q65qxkOlEx+r7EGFXQaNg56YX5BKSVlxvdU9OZnVvEnylS7QvcDTCc7YmM6l9w== X-Received: by 2002:a2e:b0c2:: with SMTP id g2mr5324803ljl.217.1568900386154; Thu, 19 Sep 2019 06:39:46 -0700 (PDT) Received: from uranus.localdomain ([5.18.103.226]) by smtp.gmail.com with ESMTPSA id 81sm1669121lje.70.2019.09.19.06.39.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 19 Sep 2019 06:39:44 -0700 (PDT) Received: by uranus.localdomain (Postfix, from userid 1000) id 599274614AD; Thu, 19 Sep 2019 16:39:44 +0300 (MSK) Date: Thu, 19 Sep 2019 16:39:44 +0300 From: Cyrill Gorcunov To: LKML Cc: Ingo Molnar , Thomas Gleixner Subject: [PATCH -tip] x86/boot: Reserve enough space for any cpu level string Message-ID: <20190919133944.GB2507@uranus.lan> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.12.1 (2019-06-15) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Currently when we're validating cpu on boot stage we assume that cpu level won't ever be greater than two digits. In particular the check_cpu() helper ensures to be so. Still the cpu_name() helper is a way too far from check_cpu() routine internals so I think better to be on a safe side and prevent any possible overrun errors when printing cpu name. For this sake just increase the buffer up to be able to keep any level. CC: Ingo Molnar CC: Thomas Gleixner Signed-off-by: Cyrill Gorcunov --- arch/x86/boot/cpu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) Index: linux-tip.git/arch/x86/boot/cpu.c =================================================================== --- linux-tip.git.orig/arch/x86/boot/cpu.c +++ linux-tip.git/arch/x86/boot/cpu.c @@ -20,7 +20,7 @@ static char *cpu_name(int level) { - static char buf[6]; + static char buf[16]; if (level == 64) { return "x86-64";