From patchwork Mon Jan 15 18:17:46 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roberto Sassu X-Patchwork-Id: 13519915 X-Patchwork-Delegate: paul@paul-moore.com Received: from frasgout13.his.huawei.com (frasgout13.his.huawei.com [14.137.139.46]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5EAF5182AF; Mon, 15 Jan 2024 18:19:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=huaweicloud.com Received: from mail.maildlp.com (unknown [172.18.186.29]) by frasgout13.his.huawei.com (SkyGuard) with ESMTP id 4TDKm72nGkz9xGn0; Tue, 16 Jan 2024 02:04:39 +0800 (CST) Received: from mail02.huawei.com (unknown [7.182.16.27]) by mail.maildlp.com (Postfix) with ESMTP id BEDDA1407FA; Tue, 16 Jan 2024 02:19:10 +0800 (CST) Received: from huaweicloud.com (unknown [10.204.63.22]) by APP2 (Coremail) with SMTP id GxC2BwAXBCjzdqVl8DKbAA--.57127S4; Mon, 15 Jan 2024 19:19:10 +0100 (CET) From: Roberto Sassu To: viro@zeniv.linux.org.uk, brauner@kernel.org, chuck.lever@oracle.com, jlayton@kernel.org, neilb@suse.de, kolga@netapp.com, Dai.Ngo@oracle.com, tom@talpey.com, paul@paul-moore.com, jmorris@namei.org, serge@hallyn.com, zohar@linux.ibm.com, dmitry.kasatkin@gmail.com, eric.snowberg@oracle.com, dhowells@redhat.com, jarkko@kernel.org, stephen.smalley.work@gmail.com, eparis@parisplace.org, casey@schaufler-ca.com, shuah@kernel.org, mic@digikod.net Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-security-module@vger.kernel.org, linux-integrity@vger.kernel.org, keyrings@vger.kernel.org, selinux@vger.kernel.org, linux-kselftest@vger.kernel.org, Roberto Sassu , Stefan Berger Subject: [PATCH v9 02/25] ima: Align ima_file_mprotect() definition with LSM infrastructure Date: Mon, 15 Jan 2024 19:17:46 +0100 Message-Id: <20240115181809.885385-3-roberto.sassu@huaweicloud.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240115181809.885385-1-roberto.sassu@huaweicloud.com> References: <20240115181809.885385-1-roberto.sassu@huaweicloud.com> Precedence: bulk X-Mailing-List: linux-security-module@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-CM-TRANSID: GxC2BwAXBCjzdqVl8DKbAA--.57127S4 X-Coremail-Antispam: 1UD129KBjvJXoWxAryfJr4DurWftryDAr43Jrb_yoW5ZFWkpa n8KasrGrWxJFy09r97ZFW7ua43K3yIgw1UXa9ag340vFn0qFnYqr13AFy8ur1rZr9YyFn2 y3y7trW5A3WDtrJanT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUB2b4IE77IF4wAFF20E14v26rWj6s0DM7CY07I20VC2zVCF04k2 6cxKx2IYs7xG6rWj6s0DM7CIcVAFz4kK6r1j6r18M28IrcIa0xkI8VA2jI8067AKxVWUXw A2048vs2IY020Ec7CjxVAFwI0_Xr0E3s1l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0rcxS w2x7M28EF7xvwVC0I7IYx2IY67AKxVWUJVWUCwA2z4x0Y4vE2Ix0cI8IcVCY1x0267AKxV WxJVW8Jr1l84ACjcxK6I8E87Iv67AKxVW8JVWxJwA2z4x0Y4vEx4A2jsIEc7CjxVAFwI0_ Gr1j6F4UJwAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ew Av7VC0I7IYx2IY67AKxVWUJVWUGwAv7VC2z280aVAFwI0_Jr0_Gr1lOx8S6xCaFVCjc4AY 6r1j6r4UM4x0Y48IcxkI7VAKI48JM4IIrI8v6xkF7I0E8cxan2IY04v7MxAIw28IcxkI7V AKI48JMxC20s026xCaFVCjc4AY6r1j6r4UMI8I3I0E5I8CrVAFwI0_Jr0_Jr4lx2IqxVCj r7xvwVAFwI0_JrI_JrWlx4CE17CEb7AF67AKxVW8ZVWrXwCIc40Y0x0EwIxGrwCI42IY6x IIjxv20xvE14v26r1j6r1xMIIF0xvE2Ix0cI8IcVCY1x0267AKxVWxJVW8Jr1lIxAIcVCF 04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r4j6F4UMIIF0xvEx4A2jsIEc7 CjxVAFwI0_Gr1j6F4UJbIYCTnIWIevJa73UjIFyTuYvjxUFa9-UUUUU X-CM-SenderInfo: purev21wro2thvvxqx5xdzvxpfor3voofrz/1tbiAQADBF1jj5iRxQABs6 From: Roberto Sassu Change ima_file_mprotect() definition, so that it can be registered as implementation of the file_mprotect hook. Signed-off-by: Roberto Sassu Reviewed-by: Stefan Berger Reviewed-by: Casey Schaufler Reviewed-by: Mimi Zohar Acked-by: Paul Moore --- include/linux/ima.h | 5 +++-- security/integrity/ima/ima_main.c | 6 ++++-- security/security.c | 2 +- 3 files changed, 8 insertions(+), 5 deletions(-) diff --git a/include/linux/ima.h b/include/linux/ima.h index 910a2f11a906..b66353f679e8 100644 --- a/include/linux/ima.h +++ b/include/linux/ima.h @@ -23,7 +23,8 @@ extern void ima_post_create_tmpfile(struct mnt_idmap *idmap, extern void ima_file_free(struct file *file); extern int ima_file_mmap(struct file *file, unsigned long reqprot, unsigned long prot, unsigned long flags); -extern int ima_file_mprotect(struct vm_area_struct *vma, unsigned long prot); +extern int ima_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot, + unsigned long prot); extern int ima_load_data(enum kernel_load_data_id id, bool contents); extern int ima_post_load_data(char *buf, loff_t size, enum kernel_load_data_id id, char *description); @@ -84,7 +85,7 @@ static inline int ima_file_mmap(struct file *file, unsigned long reqprot, } static inline int ima_file_mprotect(struct vm_area_struct *vma, - unsigned long prot) + unsigned long reqprot, unsigned long prot) { return 0; } diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c index cc1217ac2c6f..b3f5e8401056 100644 --- a/security/integrity/ima/ima_main.c +++ b/security/integrity/ima/ima_main.c @@ -455,7 +455,8 @@ int ima_file_mmap(struct file *file, unsigned long reqprot, /** * ima_file_mprotect - based on policy, limit mprotect change * @vma: vm_area_struct protection is set to - * @prot: contains the protection that will be applied by the kernel. + * @reqprot: protection requested by the application + * @prot: protection that will be applied by the kernel * * Files can be mmap'ed read/write and later changed to execute to circumvent * IMA's mmap appraisal policy rules. Due to locking issues (mmap semaphore @@ -465,7 +466,8 @@ int ima_file_mmap(struct file *file, unsigned long reqprot, * * On mprotect change success, return 0. On failure, return -EACESS. */ -int ima_file_mprotect(struct vm_area_struct *vma, unsigned long prot) +int ima_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot, + unsigned long prot) { struct ima_template_desc *template = NULL; struct file *file; diff --git a/security/security.c b/security/security.c index 013c847b28d0..0608679478ea 100644 --- a/security/security.c +++ b/security/security.c @@ -2837,7 +2837,7 @@ int security_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot, ret = call_int_hook(file_mprotect, 0, vma, reqprot, prot); if (ret) return ret; - return ima_file_mprotect(vma, prot); + return ima_file_mprotect(vma, reqprot, prot); } /**