From patchwork Thu Dec 14 17:08:18 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roberto Sassu X-Patchwork-Id: 13493336 X-Patchwork-Delegate: paul@paul-moore.com Received: from frasgout11.his.huawei.com (frasgout11.his.huawei.com [14.137.139.23]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6C5B2122; Thu, 14 Dec 2023 09:11:09 -0800 (PST) Received: from mail.maildlp.com (unknown [172.18.186.51]) by frasgout11.his.huawei.com (SkyGuard) with ESMTP id 4Srdmv1mnWz9y1HP; Fri, 15 Dec 2023 00:57:03 +0800 (CST) Received: from mail02.huawei.com (unknown [7.182.16.47]) by mail.maildlp.com (Postfix) with ESMTP id 4217514064E; Fri, 15 Dec 2023 01:10:57 +0800 (CST) Received: from huaweicloud.com (unknown [10.204.63.22]) by APP1 (Coremail) with SMTP id LxC2BwBXlHSpNntl4xuLAg--.58219S10; Thu, 14 Dec 2023 18:10:56 +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, 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-fsdevel@vger.kernel.org, linux-kernel@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 v8 08/24] evm: Align evm_inode_post_setxattr() definition with LSM infrastructure Date: Thu, 14 Dec 2023 18:08:18 +0100 Message-Id: <20231214170834.3324559-9-roberto.sassu@huaweicloud.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231214170834.3324559-1-roberto.sassu@huaweicloud.com> References: <20231214170834.3324559-1-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: LxC2BwBXlHSpNntl4xuLAg--.58219S10 X-Coremail-Antispam: 1UD129KBjvJXoWxGw4rCrWDuF4fAFy8XF1xAFb_yoW5uw1kpF ZxKa4DCw1rJFyUWryvyF48u3sY9ayrWryjy3yDKw1IyFnxtr92qryxJr1j9ryrJr48GFnY qa1avrs5K3W3X3DanT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUBvb4IE77IF4wAFF20E14v26rWj6s0DM7CY07I20VC2zVCF04k2 6cxKx2IYs7xG6rWj6s0DM7CIcVAFz4kK6r1j6r18M28IrcIa0xkI8VA2jI8067AKxVWUAV Cq3wA2048vs2IY020Ec7CjxVAFwI0_Xr0E3s1l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0 rcxSw2x7M28EF7xvwVC0I7IYx2IY67AKxVWUCVW8JwA2z4x0Y4vE2Ix0cI8IcVCY1x0267 AKxVW8Jr0_Cr1UM28EF7xvwVC2z280aVAFwI0_Gr0_Cr1l84ACjcxK6I8E87Iv6xkF7I0E 14v26r4UJVWxJr1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAqx4xG64xvF2IEw4CE5I8CrV C2j2WlYx0E2Ix0cI8IcVAFwI0_Jr0_Jr4lYx0Ex4A2jsIE14v26r1j6r4UMcvjeVCFs4IE 7xkEbVWUJVW8JwACjcxG0xvY0x0EwIxGrwACI402YVCY1x02628vn2kIc2xKxwCF04k20x vY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E14v26r1j6r18MI8I 3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_GFv_WrylIxkGc2Ij64vIr41lIx AIcVC0I7IYx2IY67AKxVWUCVW8JwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Gr1j6F4UJwCI 42IY6xAIw20EY4v20xvaj40_Jr0_JF4lIxAIcVC2z280aVAFwI0_Gr0_Cr1lIxAIcVC2z2 80aVCY1x0267AKxVW8Jr0_Cr1UYxBIdaVFxhVjvjDU0xZFpf9x07UZo7tUUUUU= X-CM-SenderInfo: purev21wro2thvvxqx5xdzvxpfor3voofrz/1tbiAgALBF1jj5OoMgAAs1 From: Roberto Sassu Change evm_inode_post_setxattr() definition, so that it can be registered as implementation of the inode_post_setxattr hook. Signed-off-by: Roberto Sassu Reviewed-by: Stefan Berger Reviewed-by: Mimi Zohar Reviewed-by: Casey Schaufler --- include/linux/evm.h | 8 +++++--- security/integrity/evm/evm_main.c | 4 +++- security/security.c | 2 +- 3 files changed, 9 insertions(+), 5 deletions(-) diff --git a/include/linux/evm.h b/include/linux/evm.h index 7c6a74dbc093..437d4076a3b3 100644 --- a/include/linux/evm.h +++ b/include/linux/evm.h @@ -31,7 +31,8 @@ extern int evm_inode_setxattr(struct mnt_idmap *idmap, extern void evm_inode_post_setxattr(struct dentry *dentry, const char *xattr_name, const void *xattr_value, - size_t xattr_value_len); + size_t xattr_value_len, + int flags); extern int evm_inode_removexattr(struct mnt_idmap *idmap, struct dentry *dentry, const char *xattr_name); extern void evm_inode_post_removexattr(struct dentry *dentry, @@ -55,7 +56,7 @@ static inline void evm_inode_post_set_acl(struct dentry *dentry, const char *acl_name, struct posix_acl *kacl) { - return evm_inode_post_setxattr(dentry, acl_name, NULL, 0); + return evm_inode_post_setxattr(dentry, acl_name, NULL, 0, 0); } int evm_inode_init_security(struct inode *inode, struct inode *dir, @@ -114,7 +115,8 @@ static inline int evm_inode_setxattr(struct mnt_idmap *idmap, static inline void evm_inode_post_setxattr(struct dentry *dentry, const char *xattr_name, const void *xattr_value, - size_t xattr_value_len) + size_t xattr_value_len, + int flags) { return; } diff --git a/security/integrity/evm/evm_main.c b/security/integrity/evm/evm_main.c index 7fc083d53fdf..ea84a6f835ff 100644 --- a/security/integrity/evm/evm_main.c +++ b/security/integrity/evm/evm_main.c @@ -730,6 +730,7 @@ bool evm_revalidate_status(const char *xattr_name) * @xattr_name: pointer to the affected extended attribute name * @xattr_value: pointer to the new extended attribute value * @xattr_value_len: pointer to the new extended attribute value length + * @flags: flags to pass into filesystem operations * * Update the HMAC stored in 'security.evm' to reflect the change. * @@ -738,7 +739,8 @@ bool evm_revalidate_status(const char *xattr_name) * i_mutex lock. */ void evm_inode_post_setxattr(struct dentry *dentry, const char *xattr_name, - const void *xattr_value, size_t xattr_value_len) + const void *xattr_value, size_t xattr_value_len, + int flags) { if (!evm_revalidate_status(xattr_name)) return; diff --git a/security/security.c b/security/security.c index ae3625198c9f..53793f3cb36a 100644 --- a/security/security.c +++ b/security/security.c @@ -2367,7 +2367,7 @@ void security_inode_post_setxattr(struct dentry *dentry, const char *name, if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) return; call_void_hook(inode_post_setxattr, dentry, name, value, size, flags); - evm_inode_post_setxattr(dentry, name, value, size); + evm_inode_post_setxattr(dentry, name, value, size, flags); } /**