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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id ADEC1C433FE for ; Wed, 29 Sep 2021 11:43:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8E2DB61407 for ; Wed, 29 Sep 2021 11:43:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S245723AbhI2LpQ (ORCPT ); Wed, 29 Sep 2021 07:45:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60990 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229469AbhI2LpO (ORCPT ); Wed, 29 Sep 2021 07:45:14 -0400 Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EC9C7C06161C; Wed, 29 Sep 2021 04:43:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=KZ+E5oLWKLFJuTU5cjsoTqwki26dY/76dJGUFcLVMr0=; b=F9oHWZHp+ANB74Bdvmb61IHqGM lVKUQ77K30NvjSxDEmcy7FNyL/lmVrziueVtRSjjIYMC1/6LhovsbjtcJ6zA3JzmU6BB6BfQhL2tP ZKhRYkZNacOHaXjFAgwnwbfZ7j+m7iW+sa5QoFbXdVwbB817JSVnJFEqU7Ax8Zn6QbkurF8fRceJk wcP/n1CAjN+HwMDWiQwxjXExlrGAFBCyX8XAx2fqBVSibrpwRroXB2eYyQCN5AJfPogBBNrSkEz87 xEDJf/GUKCa0MqQPB1J1zOqDG6Ehjil3VoXXw2aer3JZzGZV+BcoF15O+yexOV0XlpW3e3dqQpClD m7be70jw==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1mVXzg-006hZh-4W; Wed, 29 Sep 2021 11:43:24 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id B3001300056; Wed, 29 Sep 2021 13:43:23 +0200 (CEST) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 754302C905DB5; Wed, 29 Sep 2021 13:43:23 +0200 (CEST) Date: Wed, 29 Sep 2021 13:43:23 +0200 From: Peter Zijlstra To: Mark Rutland Cc: Josh Poimboeuf , Dmitry Vyukov , syzbot , Linux ARM , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk, will@kernel.org, x86@kernel.org Subject: Re: [syzbot] upstream test error: KASAN: invalid-access Read in __entry_tramp_text_end Message-ID: References: <20210927170122.GA9201@C02TD0UTHF1T.local> <20210927171812.GB9201@C02TD0UTHF1T.local> <20210928103543.GF1924@C02TD0UTHF1T.local> <20210929013637.bcarm56e4mqo3ndt@treble> <20210929085035.GA33284@C02TD0UTHF1T.local> <20210929103730.GC33284@C02TD0UTHF1T.local> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210929103730.GC33284@C02TD0UTHF1T.local> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Sep 29, 2021 at 11:37:30AM +0100, Mark Rutland wrote: > > This is because _ASM_EXTABLE only generates data for another section. > > There doesn't need to be code continuity between these two asm > > statements. > > I think you've missed my point. It doesn't matter that the > asm_volatile_goto() doesn't contain code, and this is solely about the > *state* expected at entry/exit from each asm block being different. Urgh.. indeed :/