Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964991AbdLVI6c (ORCPT ); Fri, 22 Dec 2017 03:58:32 -0500 Received: from mail.linuxfoundation.org ([140.211.169.12]:36212 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S964973AbdLVI60 (ORCPT ); Fri, 22 Dec 2017 03:58:26 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Josh Poimboeuf , Andy Lutomirski , Boris Ostrovsky , Jiri Slaby , Juergen Gross , Linus Torvalds , Peter Zijlstra , Thomas Gleixner , Ingo Molnar Subject: [PATCH 4.14 002/159] objtool: Dont report end of section error after an empty unwind hint Date: Fri, 22 Dec 2017 09:44:47 +0100 Message-Id: <20171222084623.796730664@linuxfoundation.org> X-Mailer: git-send-email 2.15.1 In-Reply-To: <20171222084623.668990192@linuxfoundation.org> References: <20171222084623.668990192@linuxfoundation.org> User-Agent: quilt/0.65 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1434 Lines: 48 4.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Josh Poimboeuf commit 00d96180dc38ef872ac471c2d3e14b067cbd895d upstream. If asm code specifies an UNWIND_HINT_EMPTY hint, don't warn if the section ends unexpectedly. This can happen with the xen-head.S code because the hypercall_page is "text" but it's all zeros. Signed-off-by: Josh Poimboeuf Cc: Andy Lutomirski Cc: Boris Ostrovsky Cc: Jiri Slaby Cc: Juergen Gross Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Link: http://lkml.kernel.org/r/ddafe199dd8797e40e3c2777373347eba1d65572.1505764066.git.jpoimboe@redhat.com Signed-off-by: Ingo Molnar Signed-off-by: Greg Kroah-Hartman --- tools/objtool/check.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -1757,11 +1757,14 @@ static int validate_branch(struct objtoo if (insn->dead_end) return 0; - insn = next_insn; - if (!insn) { + if (!next_insn) { + if (state.cfa.base == CFI_UNDEFINED) + return 0; WARN("%s: unexpected end of section", sec->name); return 1; } + + insn = next_insn; } return 0;