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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EBBCDC001B0 for ; Sun, 23 Jul 2023 14:27:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229685AbjGWO1v (ORCPT ); Sun, 23 Jul 2023 10:27:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45492 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229470AbjGWO1t (ORCPT ); Sun, 23 Jul 2023 10:27:49 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 62A05E57 for ; Sun, 23 Jul 2023 07:27:48 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id E5DA660DC0 for ; Sun, 23 Jul 2023 14:27:47 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 283B8C433C8; Sun, 23 Jul 2023 14:27:44 +0000 (UTC) Date: Sun, 23 Jul 2023 10:27:33 -0400 From: Steven Rostedt To: Cc: regressions@lists.linux.dev, bagasdotme@gmail.com, alexander.deucher@amd.com, christian.koenig@amd.com, Xinhui.Pan@amd.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, linux-kernel@vger.kernel.org, amd-gfx@lists.freedesktop.org, kkabe@vega.pgw.jp Subject: Re: radeon.ko/i586: BUG: kernel NULL pointer dereference,address:00000004 Message-ID: <20230723102733.70baeb1a@rorschach.local.home> In-Reply-To: <230722113014.M0204460@vega.pgw.jp> References: <230721083955.M0102626@vega.pgw.jp> <230722113014.M0204460@vega.pgw.jp> X-Mailer: Claws Mail 3.17.8 (GTK+ 2.24.33; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, 22 Jul 2023 11:30:14 +0900 wrote: > >> diff --git a/arch/x86/include/asm/ftrace.h b/arch/x86/include/asm/ftrace.h > >> index 897cf02c20b1..801f4414da3e 100644 > >> --- a/arch/x86/include/asm/ftrace.h > >> +++ b/arch/x86/include/asm/ftrace.h > >> @@ -13,7 +13,7 @@ > >> #ifdef CONFIG_HAVE_FENTRY > >> # include > >> /* Add offset for endbr64 if IBT enabled */ > >> -# define FTRACE_MCOUNT_MAX_OFFSET ENDBR_INSN_SIZE > >> +# define FTRACE_MCOUNT_MAX_OFFSET (ENDBR_INSN_SIZE + MCOUNT_INSN_SIZE) > >> #endif > >> > >> #ifdef CONFIG_DYNAMIC_FTRACE > >> > > Above patch didn't work, but > Does it matter that I am compiling with "gcc -fcf-protection=none" > to not emit endbr32 instructions for i586? This patch is supposed to address the case when ENDBR_INSN_SIZE is zero. So I would think that that wouldn't matter. -- Steve