From patchwork Mon May 18 17:36:07 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 225588 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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 2B566C433E1 for ; Mon, 18 May 2020 18:25:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 075E020643 for ; Mon, 18 May 2020 18:25:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1589826317; bh=1WbaTJpCskWe+VDdU5uH9XMNgsIAJxBGSgPlR8VHLZE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=U5QqUTJwS52jmPakgmPxglA3Kjq7+jEQxkshj04y3z2NgBR4lX6frI11X6QTzH03v epXyYB8gvObUABiGG590FetEgw7MywZiSJAJQnRpoBWpZpPMEvba6pZRZWepktZdYj f50rxhbOuhkSu0XCqWhDw4IdCAdBqchNCmI4NNGU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730137AbgERRqy (ORCPT ); Mon, 18 May 2020 13:46:54 -0400 Received: from mail.kernel.org ([198.145.29.99]:46950 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730149AbgERRqy (ORCPT ); Mon, 18 May 2020 13:46:54 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id F229420715; Mon, 18 May 2020 17:46:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1589824013; bh=1WbaTJpCskWe+VDdU5uH9XMNgsIAJxBGSgPlR8VHLZE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=a0X4g+w3rGgxnzscO089ZzYmlF0Pd6eicOFJTPF11/Brv8AM4xZWWdiHEjCRxdHrW lvJHmqPBa3er0ke7Lfl+ba4XYDxrLDVF37KhuIl3fT/q/saLMWRq5E7loPxn8b9cLu QoQ8WJvgSB+RRL7SDBI3wurMZYGmGmxEwOkf/07s= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Vince Weaver , Dave Jones , Steven Rostedt , Vegard Nossum , Joe Mario , Miroslav Benes , Josh Poimboeuf , Ingo Molnar , Andy Lutomirski , Jann Horn , Peter Zijlstra , Thomas Gleixner Subject: [PATCH 4.14 035/114] objtool: Fix stack offset tracking for indirect CFAs Date: Mon, 18 May 2020 19:36:07 +0200 Message-Id: <20200518173509.967486986@linuxfoundation.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200518173503.033975649@linuxfoundation.org> References: <20200518173503.033975649@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Josh Poimboeuf commit d8dd25a461e4eec7190cb9d66616aceacc5110ad upstream. When the current frame address (CFA) is stored on the stack (i.e., cfa->base == CFI_SP_INDIRECT), objtool neglects to adjust the stack offset when there are subsequent pushes or pops. This results in bad ORC data at the end of the ENTER_IRQ_STACK macro, when it puts the previous stack pointer on the stack and does a subsequent push. This fixes the following unwinder warning: WARNING: can't dereference registers at 00000000f0a6bdba for ip interrupt_entry+0x9f/0xa0 Fixes: 627fce14809b ("objtool: Add ORC unwind table generation") Reported-by: Vince Weaver Reported-by: Dave Jones Reported-by: Steven Rostedt Reported-by: Vegard Nossum Reported-by: Joe Mario Reviewed-by: Miroslav Benes Signed-off-by: Josh Poimboeuf Signed-off-by: Ingo Molnar Cc: Andy Lutomirski Cc: Jann Horn Cc: Peter Zijlstra Cc: Thomas Gleixner Link: https://lore.kernel.org/r/853d5d691b29e250333332f09b8e27410b2d9924.1587808742.git.jpoimboe@redhat.com Signed-off-by: Greg Kroah-Hartman --- tools/objtool/check.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -1291,7 +1291,7 @@ static int update_insn_state_regs(struct struct cfi_reg *cfa = &state->cfa; struct stack_op *op = &insn->stack_op; - if (cfa->base != CFI_SP) + if (cfa->base != CFI_SP && cfa->base != CFI_SP_INDIRECT) return 0; /* push */