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=-9.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 387E3C6786C for ; Fri, 14 Dec 2018 12:24:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id F34B320892 for ; Fri, 14 Dec 2018 12:24:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1544790288; bh=0SB87O0M75B5IQMQphSeUIRxz7akZM1/3C7q+9EWfAk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=mPNVz4WjNd1In3xtwhPgbwLOHgM1okRWT8tQrhsqCnA34AwZsFlPLbmlA+m5Ier4s Whbh5c7LHGeju53PQ7uETh/5buQY/9F57G1rjIv8k5K70C4xy6PQAVbaptdVb8NXJq AXol1iYCX2RIDTYWm5ZG6i1ASP8zLOQKJwYKn5ok= DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org F34B320892 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linuxfoundation.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731966AbeLNMYr (ORCPT ); Fri, 14 Dec 2018 07:24:47 -0500 Received: from mail.kernel.org ([198.145.29.99]:60100 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731995AbeLNMMr (ORCPT ); Fri, 14 Dec 2018 07:12:47 -0500 Received: from localhost (5356596B.cm-6-7b.dynamic.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 48B9C214D9; Fri, 14 Dec 2018 12:12:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1544789566; bh=0SB87O0M75B5IQMQphSeUIRxz7akZM1/3C7q+9EWfAk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ln81NS/LBpXpzXkkRlSzBhX1xAc1vWfUbRFOAxBAPAt75x8F/VeSsaaPQNgLYUHVU 4PHkdEXl/pB3fRwv2j5VdeWg7Y2ZXaKuSY/Ik3rRwJ+jmPvZKPB4H82K8BBljackcJ 5Mq28szBQPqJkuBDPW0f755OBeciZUk0C/ZCMVXY= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Artem Savkov , Josh Poimboeuf , Linus Torvalds , Peter Zijlstra , Thomas Gleixner , Ingo Molnar , Sasha Levin Subject: [PATCH 4.9 21/51] objtool: Fix double-free in .cold detection error path Date: Fri, 14 Dec 2018 13:00:23 +0100 Message-Id: <20181214115715.391008633@linuxfoundation.org> X-Mailer: git-send-email 2.20.0 In-Reply-To: <20181214115713.244259772@linuxfoundation.org> References: <20181214115713.244259772@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ [ Upstream commit 0b9301fb632f7111a3293a30cc5b20f1b82ed08d ] If read_symbols() fails during second list traversal (the one dealing with ".cold" subfunctions) it frees the symbol, but never deletes it from the list/hash_table resulting in symbol being freed again in elf_close(). Fix it by just returning an error, leaving cleanup to elf_close(). Signed-off-by: Artem Savkov Signed-off-by: Josh Poimboeuf Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Fixes: 13810435b9a7 ("objtool: Support GCC 8's cold subfunctions") Link: http://lkml.kernel.org/r/beac5a9b7da9e8be90223459dcbe07766ae437dd.1542736240.git.jpoimboe@redhat.com Signed-off-by: Ingo Molnar Signed-off-by: Sasha Levin --- tools/objtool/elf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/objtool/elf.c b/tools/objtool/elf.c index 0d1acb704f64..3616d626991e 100644 --- a/tools/objtool/elf.c +++ b/tools/objtool/elf.c @@ -312,7 +312,7 @@ static int read_symbols(struct elf *elf) if (!pfunc) { WARN("%s(): can't find parent function", sym->name); - goto err; + return -1; } sym->pfunc = pfunc; -- 2.19.1