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=-3.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS autolearn=no 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 2037EC433DF for ; Wed, 8 Jul 2020 19:30:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 09AE72065D for ; Wed, 8 Jul 2020 19:30:00 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="FQ3NX3uo"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="aJZIrF/H" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726194AbgGHT37 (ORCPT ); Wed, 8 Jul 2020 15:29:59 -0400 Received: from Galois.linutronix.de ([193.142.43.55]:53214 "EHLO galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725903AbgGHT35 (ORCPT ); Wed, 8 Jul 2020 15:29:57 -0400 Message-Id: <20200708192934.191497962@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1594236595; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: references:references; bh=/nv6nHzdsyg94XWmVtMVQp/C0kZO0fIGgRkzjMjCxgM=; b=FQ3NX3uop0fQ6cRE/oxT9FDRqLNLe36vgY72etGnzDWTYYZuduK3Al5w19HG2D/3TQYN59 wutPaqwvRvK/GppXAyvsNegJLpjL9YeYlfR8szLb0C1zBnARBnfw86P+h6npj/An5WTOTA 4r0tpboKPnm2e8ZQ7On19Fg0qf5ZAq8jq2fO7A5Oa0Y2U3vkEBopCFh3sLF2XEMI/rVERD Vc8in9xesEC1IWEWndI5vCqYiRP0AQIkprxuBZI+np3hZk+2soIAsi4k9MNLdX8zTVnM1Q cPtBfNRpTlCVGBMWPwM+r/j4y656RcVq6J/MUG019Wv8vxyk77ZL5q3CSeJXxQ== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1594236595; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: references:references; bh=/nv6nHzdsyg94XWmVtMVQp/C0kZO0fIGgRkzjMjCxgM=; b=aJZIrF/Hz07SquSNCsWLxarHJgA5rREMlcfOEaVHWMIpEAUApomFX0+hhtYiRYqvh53CLP DliejEphflG3eiCg== Date: Wed, 08 Jul 2020 21:28:06 +0200 From: Thomas Gleixner To: LKML Cc: x86@kernel.org Subject: [patch 2/3] x86/entry: Mark check_user_regs() noinstr References: <20200708192804.911958542@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-transfer-encoding: 8-bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org It's called from the non-instrumentable section. Fixes: c9c26150e61d ("x86/entry: Assert that syscalls are on the right stack") Signed-off-by: Thomas Gleixner --- arch/x86/entry/common.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/x86/entry/common.c +++ b/arch/x86/entry/common.c @@ -46,7 +46,7 @@ #include /* Check that the stack and regs on entry from user mode are sane. */ -static void check_user_regs(struct pt_regs *regs) +static noinstr void check_user_regs(struct pt_regs *regs) { if (IS_ENABLED(CONFIG_DEBUG_ENTRY)) { /*