From patchwork Tue Jun 23 00:32:32 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tyler Hicks X-Patchwork-Id: 11619489 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8522090 for ; Tue, 23 Jun 2020 00:34:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5F9E0207DD for ; Tue, 23 Jun 2020 00:34:47 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=linux.microsoft.com header.i=@linux.microsoft.com header.b="p8I54MFO" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731680AbgFWAeq (ORCPT ); Mon, 22 Jun 2020 20:34:46 -0400 Received: from linux.microsoft.com ([13.77.154.182]:47544 "EHLO linux.microsoft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732009AbgFWAeY (ORCPT ); Mon, 22 Jun 2020 20:34:24 -0400 Received: from sequoia.work.tihix.com (162-237-133-238.lightspeed.rcsntx.sbcglobal.net [162.237.133.238]) by linux.microsoft.com (Postfix) with ESMTPSA id 7D5C820B7192; Mon, 22 Jun 2020 17:34:23 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 7D5C820B7192 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1592872464; bh=EIfQa71W+wSH28J/gAtVyVwZP6jN6OZSnsojTGHhpic=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=p8I54MFObjdsFyRtrc3RrhsboG9BU+0JnbS0PSdcE++h8wp8dp3T6HijlXsuyxZBq 8rfyjIBvTLiVOWzIgowFzyMGwzxgRMjp5LmX3kY8gg9eizLjx3ZpO8jG3MbVjbw2JM KWFzYLA2SdX0C7IJY+jAwp1aCcSq+jBLch7k/rnM= From: Tyler Hicks To: Mimi Zohar , Dmitry Kasatkin Cc: James Morris , "Serge E . Hallyn" , Lakshmi Ramasubramanian , Prakhar Srivastava , linux-kernel@vger.kernel.org, linux-integrity@vger.kernel.org, linux-security-module@vger.kernel.org Subject: [PATCH 08/12] ima: Shallow copy the args_p member of ima_rule_entry.lsm elements Date: Mon, 22 Jun 2020 19:32:32 -0500 Message-Id: <20200623003236.830149-9-tyhicks@linux.microsoft.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200623003236.830149-1-tyhicks@linux.microsoft.com> References: <20200623003236.830149-1-tyhicks@linux.microsoft.com> MIME-Version: 1.0 Sender: linux-integrity-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-integrity@vger.kernel.org The args_p member is a simple string that is allocated by ima_rule_init(). Shallow copy it like other non-LSM references in ima_rule_entry structs. There are no longer any necessary error path cleanups to do in ima_lsm_copy_rule() so reference ownership from entry to nentry becomes easier. Signed-off-by: Tyler Hicks --- security/integrity/ima/ima_policy.c | 13 ++----------- 1 file changed, 2 insertions(+), 11 deletions(-) diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c index e33347148aa9..e9c7d318fdd4 100644 --- a/security/integrity/ima/ima_policy.c +++ b/security/integrity/ima/ima_policy.c @@ -306,10 +306,8 @@ static struct ima_rule_entry *ima_lsm_copy_rule(struct ima_rule_entry *entry) continue; nentry->lsm[i].type = entry->lsm[i].type; - nentry->lsm[i].args_p = kstrdup(entry->lsm[i].args_p, - GFP_KERNEL); - if (!nentry->lsm[i].args_p) - goto out_err; + nentry->lsm[i].args_p = entry->lsm[i].args_p; + entry->lsm[i].args_p = NULL; security_filter_rule_init(nentry->lsm[i].type, Audit_equal, @@ -325,13 +323,6 @@ static struct ima_rule_entry *ima_lsm_copy_rule(struct ima_rule_entry *entry) entry->keyrings = NULL; entry->template = NULL; return nentry; - -out_err: - nentry->fsname = NULL; - nentry->keyrings = NULL; - nentry->template = NULL; - ima_free_rule(nentry); - return NULL; } static int ima_lsm_update_rule(struct ima_rule_entry *entry)