From patchwork Sat Nov 12 09:27:19 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiu Jianfeng X-Patchwork-Id: 13041113 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 BA2FAC4332F for ; Sat, 12 Nov 2022 09:31:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233989AbiKLJbZ (ORCPT ); Sat, 12 Nov 2022 04:31:25 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60898 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234562AbiKLJbW (ORCPT ); Sat, 12 Nov 2022 04:31:22 -0500 Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E69D51DF3B; Sat, 12 Nov 2022 01:31:21 -0800 (PST) Received: from dggpeml500023.china.huawei.com (unknown [172.30.72.53]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4N8VbX4YmNzbnb0; Sat, 12 Nov 2022 17:27:36 +0800 (CST) Received: from ubuntu1804.huawei.com (10.67.174.58) by dggpeml500023.china.huawei.com (7.185.36.114) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Sat, 12 Nov 2022 17:31:20 +0800 From: Xiu Jianfeng To: , , , , , CC: , , , Subject: [PATCH] ima: Fix misuse of dereference of pointer in template_desc_init_fields() Date: Sat, 12 Nov 2022 17:27:19 +0800 Message-ID: <20221112092719.224888-1-xiujianfeng@huawei.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 X-Originating-IP: [10.67.174.58] X-ClientProxiedBy: dggems702-chm.china.huawei.com (10.3.19.179) To dggpeml500023.china.huawei.com (7.185.36.114) X-CFilter-Loop: Reflected Precedence: bulk List-ID: The input parameter @fields is type of struct ima_template_field ***, so when allocates array memory for @fields, the size of element should be sizeof(**field) instead of sizeof(*field). Actually the original code would not cause any runtime error, but it's better to make it logically right. Fixes: adf53a778a0a ("ima: new templates management mechanism") Signed-off-by: Xiu Jianfeng Reviewed-by: Roberto Sassu --- security/integrity/ima/ima_template.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/security/integrity/ima/ima_template.c b/security/integrity/ima/ima_template.c index 49f0626928a1..04c49f05cb74 100644 --- a/security/integrity/ima/ima_template.c +++ b/security/integrity/ima/ima_template.c @@ -245,11 +245,11 @@ int template_desc_init_fields(const char *template_fmt, } if (fields && num_fields) { - *fields = kmalloc_array(i, sizeof(*fields), GFP_KERNEL); + *fields = kmalloc_array(i, sizeof(**fields), GFP_KERNEL); if (*fields == NULL) return -ENOMEM; - memcpy(*fields, found_fields, i * sizeof(*fields)); + memcpy(*fields, found_fields, i * sizeof(**fields)); *num_fields = i; }