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 29B26C433DF for ; Wed, 8 Jul 2020 19:30:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 05CE220720 for ; Wed, 8 Jul 2020 19:30:02 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="Kdi1i7xY"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="oQ1ykJNF" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726223AbgGHTaB (ORCPT ); Wed, 8 Jul 2020 15:30:01 -0400 Received: from Galois.linutronix.de ([193.142.43.55]:53208 "EHLO galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726107AbgGHT34 (ORCPT ); Wed, 8 Jul 2020 15:29:56 -0400 Message-Id: <20200708192934.076519438@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1594236594; 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=0jgxh9T9RaQnXULIzk201sZw8AO824RYyv3j/77l178=; b=Kdi1i7xYRfZGQWJtduMwalp3dRKOWrVjVGbDmKh2bBhufFl8QG4IyUBCz2OEbSpS8zm9pu /Cj5CN0fIT2ve9HXwxjqXl2oEMaOQVJNrXSIa9lBF5C3ntDDd8Tc6pKbChSO1PvzH7zWgp pgxnKTTwJKZRT+NUe4mtX28bGQpsQ0E5oBIHySSfyfT2q7ToKIRdBeM9mliHY6JrbYqEWj 8jht6wMnEDTGO32YoB/xj4uogMtX2k6pI8POAe7oqMsios4v7anjhXaLOEd/ZS48CuVetV dDa0pf/Ty286nJUzXig48KvyLHpAFTu0DK6HSd+2JEs6yfuQJKTTtwZ/pjwMIA== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1594236594; 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=0jgxh9T9RaQnXULIzk201sZw8AO824RYyv3j/77l178=; b=oQ1ykJNF+DL7THMBVWcwvfgAkXTcWNiWpUDOhecVfhB1+EywdovbXbu9PkJvTLJ83FgasR yezgyU/yLeLuz4AA== Date: Wed, 08 Jul 2020 21:28:05 +0200 From: Thomas Gleixner To: LKML Cc: x86@kernel.org, syzbot+0889df9502bc0f112b31@syzkaller.appspotmail.com Subject: [patch 1/3] x86/traps: Disable interrupts in exc_aligment_check() 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 exc_alignment_check() fails to disable interrupts before returning to the entry code. Fixes: ca4c6a9858c2 ("x86/traps: Make interrupt enable/disable symmetric in C code") Reported-by: syzbot+0889df9502bc0f112b31@syzkaller.appspotmail.com Signed-off-by: Thomas Gleixner --- arch/x86/kernel/traps.c | 2 ++ 1 file changed, 2 insertions(+) --- a/arch/x86/kernel/traps.c +++ b/arch/x86/kernel/traps.c @@ -303,6 +303,8 @@ DEFINE_IDTENTRY_ERRORCODE(exc_alignment_ do_trap(X86_TRAP_AC, SIGBUS, "alignment check", regs, error_code, BUS_ADRALN, NULL); + + local_irq_disable(); } #ifdef CONFIG_VMAP_STACK