From: Roberto Sassu <roberto.sassu@huawei.com> To: <zohar@linux.ibm.com>, <jmorris@namei.org>, <paul@paul-moore.com>, <casey@schaufler-ca.com> Cc: <linux-integrity@vger.kernel.org>, <linux-security-module@vger.kernel.org>, <linux-kernel@vger.kernel.org>, <selinux@vger.kernel.org>, <reiserfs-devel@vger.kernel.org>, Roberto Sassu <roberto.sassu@huawei.com> Subject: [PATCH 4/5] evm: Align evm_inode_init_security() definition with LSM infrastructure Date: Thu, 15 Apr 2021 12:04:34 +0200 [thread overview] Message-ID: <20210415100435.18619-5-roberto.sassu@huawei.com> (raw) In-Reply-To: <20210415100435.18619-1-roberto.sassu@huawei.com> This patch changes the evm_inode_init_security() definition to align with the LSM infrastructure, in preparation for moving IMA and EVM to that infrastructure. Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com> --- include/linux/evm.h | 21 ++++++++++++++------- security/integrity/evm/evm_main.c | 24 +++++++++++++++--------- security/security.c | 7 +++++-- 3 files changed, 34 insertions(+), 18 deletions(-) diff --git a/include/linux/evm.h b/include/linux/evm.h index 8cad46bcec9d..5d8b29d80296 100644 --- a/include/linux/evm.h +++ b/include/linux/evm.h @@ -34,9 +34,11 @@ extern int evm_inode_removexattr(struct user_namespace *mnt_userns, struct dentry *dentry, const char *xattr_name); extern void evm_inode_post_removexattr(struct dentry *dentry, const char *xattr_name); -extern int evm_inode_init_security(struct inode *inode, - const struct xattr *xattr_array, - struct xattr *evm); +extern int evm_inode_init_security(struct inode *inode, struct inode *dir, + const struct qstr *qstr, + const char **name, + void **value, size_t *len, + struct xattr *lsm_xattrs); extern bool evm_status_revalidate(const char *xattr_name); #ifdef CONFIG_FS_POSIX_ACL extern int posix_xattr_acl(const char *xattrname); @@ -102,11 +104,16 @@ static inline void evm_inode_post_removexattr(struct dentry *dentry, return; } -static inline int evm_inode_init_security(struct inode *inode, - const struct xattr *xattr_array, - struct xattr *evm) +static inline int evm_inode_init_security(struct inode *inode, struct inode *dir, + const struct qstr *qstr, + const char **name, + void **value, size_t *len, + struct xattr *lsm_xattrs) { - return 0; + if (!name || !value || !len || !lsm_xattrs) + return 0; + + return -EOPNOTSUPP; } static inline bool evm_status_revalidate(const char *xattr_name) diff --git a/security/integrity/evm/evm_main.c b/security/integrity/evm/evm_main.c index 84a9b7a69b1f..a5069d69a893 100644 --- a/security/integrity/evm/evm_main.c +++ b/security/integrity/evm/evm_main.c @@ -706,29 +706,35 @@ void evm_inode_post_setattr(struct dentry *dentry, int ia_valid) /* * evm_inode_init_security - initializes security.evm HMAC value */ -int evm_inode_init_security(struct inode *inode, - const struct xattr *lsm_xattr, - struct xattr *evm_xattr) +int evm_inode_init_security(struct inode *inode, struct inode *dir, + const struct qstr *qstr, + const char **name, + void **value, size_t *len, + struct xattr *lsm_xattrs) { struct evm_xattr *xattr_data; int rc; - if (!(evm_initialized & EVM_INIT_HMAC) || - !evm_protected_xattr(lsm_xattr->name)) + if (!name || !value || !len || !lsm_xattrs) return 0; + if (!(evm_initialized & EVM_INIT_HMAC) || + !evm_protected_xattr(lsm_xattrs->name)) + return -EOPNOTSUPP; + xattr_data = kzalloc(sizeof(*xattr_data), GFP_NOFS); if (!xattr_data) return -ENOMEM; xattr_data->data.type = EVM_XATTR_HMAC; - rc = evm_init_hmac(inode, lsm_xattr, xattr_data->digest); + rc = evm_init_hmac(inode, lsm_xattrs, xattr_data->digest); if (rc < 0) goto out; - evm_xattr->value = xattr_data; - evm_xattr->value_len = hash_digest_size[evm_hash_algo] + 1; - evm_xattr->name = XATTR_EVM_SUFFIX; + *name = XATTR_EVM_SUFFIX; + *value = xattr_data; + *len = hash_digest_size[evm_hash_algo] + 1; + return 0; out: kfree(xattr_data); diff --git a/security/security.c b/security/security.c index 8aabbc0f0dfc..e16ce150b111 100644 --- a/security/security.c +++ b/security/security.c @@ -1080,8 +1080,11 @@ int security_inode_init_security(struct inode *inode, struct inode *dir, goto out; } - ret = evm_inode_init_security(inode, new_xattrs, lsm_xattr); - if (ret) + ret = evm_inode_init_security(inode, dir, qstr, + &lsm_xattr->name, + &lsm_xattr->value, + &lsm_xattr->value_len, new_xattrs); + if (ret && ret != -EOPNOTSUPP) goto out; ret = initxattrs(inode, new_xattrs, fs_data); out: -- 2.26.2
WARNING: multiple messages have this Message-ID (diff)
From: Roberto Sassu <roberto.sassu@huawei.com> To: zohar@linux.ibm.com, jmorris@namei.org, paul@paul-moore.com, casey@schaufler-ca.com Cc: linux-integrity@vger.kernel.org, linux-security-module@vger.kernel.org, linux-kernel@vger.kernel.org, selinux@vger.kernel.org, reiserfs-devel@vger.kernel.org, Roberto Sassu <roberto.sassu@huawei.com> Subject: [PATCH 4/5] evm: Align evm_inode_init_security() definition with LSM infrastructure Date: Thu, 15 Apr 2021 12:04:34 +0200 [thread overview] Message-ID: <20210415100435.18619-5-roberto.sassu@huawei.com> (raw) In-Reply-To: <20210415100435.18619-1-roberto.sassu@huawei.com> This patch changes the evm_inode_init_security() definition to align with the LSM infrastructure, in preparation for moving IMA and EVM to that infrastructure. Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com> --- include/linux/evm.h | 21 ++++++++++++++------- security/integrity/evm/evm_main.c | 24 +++++++++++++++--------- security/security.c | 7 +++++-- 3 files changed, 34 insertions(+), 18 deletions(-) diff --git a/include/linux/evm.h b/include/linux/evm.h index 8cad46bcec9d..5d8b29d80296 100644 --- a/include/linux/evm.h +++ b/include/linux/evm.h @@ -34,9 +34,11 @@ extern int evm_inode_removexattr(struct user_namespace *mnt_userns, struct dentry *dentry, const char *xattr_name); extern void evm_inode_post_removexattr(struct dentry *dentry, const char *xattr_name); -extern int evm_inode_init_security(struct inode *inode, - const struct xattr *xattr_array, - struct xattr *evm); +extern int evm_inode_init_security(struct inode *inode, struct inode *dir, + const struct qstr *qstr, + const char **name, + void **value, size_t *len, + struct xattr *lsm_xattrs); extern bool evm_status_revalidate(const char *xattr_name); #ifdef CONFIG_FS_POSIX_ACL extern int posix_xattr_acl(const char *xattrname); @@ -102,11 +104,16 @@ static inline void evm_inode_post_removexattr(struct dentry *dentry, return; } -static inline int evm_inode_init_security(struct inode *inode, - const struct xattr *xattr_array, - struct xattr *evm) +static inline int evm_inode_init_security(struct inode *inode, struct inode *dir, + const struct qstr *qstr, + const char **name, + void **value, size_t *len, + struct xattr *lsm_xattrs) { - return 0; + if (!name || !value || !len || !lsm_xattrs) + return 0; + + return -EOPNOTSUPP; } static inline bool evm_status_revalidate(const char *xattr_name) diff --git a/security/integrity/evm/evm_main.c b/security/integrity/evm/evm_main.c index 84a9b7a69b1f..a5069d69a893 100644 --- a/security/integrity/evm/evm_main.c +++ b/security/integrity/evm/evm_main.c @@ -706,29 +706,35 @@ void evm_inode_post_setattr(struct dentry *dentry, int ia_valid) /* * evm_inode_init_security - initializes security.evm HMAC value */ -int evm_inode_init_security(struct inode *inode, - const struct xattr *lsm_xattr, - struct xattr *evm_xattr) +int evm_inode_init_security(struct inode *inode, struct inode *dir, + const struct qstr *qstr, + const char **name, + void **value, size_t *len, + struct xattr *lsm_xattrs) { struct evm_xattr *xattr_data; int rc; - if (!(evm_initialized & EVM_INIT_HMAC) || - !evm_protected_xattr(lsm_xattr->name)) + if (!name || !value || !len || !lsm_xattrs) return 0; + if (!(evm_initialized & EVM_INIT_HMAC) || + !evm_protected_xattr(lsm_xattrs->name)) + return -EOPNOTSUPP; + xattr_data = kzalloc(sizeof(*xattr_data), GFP_NOFS); if (!xattr_data) return -ENOMEM; xattr_data->data.type = EVM_XATTR_HMAC; - rc = evm_init_hmac(inode, lsm_xattr, xattr_data->digest); + rc = evm_init_hmac(inode, lsm_xattrs, xattr_data->digest); if (rc < 0) goto out; - evm_xattr->value = xattr_data; - evm_xattr->value_len = hash_digest_size[evm_hash_algo] + 1; - evm_xattr->name = XATTR_EVM_SUFFIX; + *name = XATTR_EVM_SUFFIX; + *value = xattr_data; + *len = hash_digest_size[evm_hash_algo] + 1; + return 0; out: kfree(xattr_data); diff --git a/security/security.c b/security/security.c index 8aabbc0f0dfc..e16ce150b111 100644 --- a/security/security.c +++ b/security/security.c @@ -1080,8 +1080,11 @@ int security_inode_init_security(struct inode *inode, struct inode *dir, goto out; } - ret = evm_inode_init_security(inode, new_xattrs, lsm_xattr); - if (ret) + ret = evm_inode_init_security(inode, dir, qstr, + &lsm_xattr->name, + &lsm_xattr->value, + &lsm_xattr->value_len, new_xattrs); + if (ret && ret != -EOPNOTSUPP) goto out; ret = initxattrs(inode, new_xattrs, fs_data); out: -- 2.26.2
next prev parent reply other threads:[~2021-04-15 10:05 UTC|newest] Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-04-15 10:04 [PATCH 0/5] evm: Prepare for moving to the LSM infrastructure Roberto Sassu 2021-04-15 10:04 ` Roberto Sassu 2021-04-15 10:04 ` [PATCH 1/5] xattr: Complete constify ->name member of "struct xattr" Roberto Sassu 2021-04-15 10:04 ` Roberto Sassu 2021-04-15 11:20 ` Tetsuo Handa 2021-04-15 12:25 ` Roberto Sassu 2021-04-15 10:04 ` [PATCH 2/5] security: Support multiple LSMs implementing the inode_init_security hook Roberto Sassu 2021-04-15 10:04 ` Roberto Sassu 2021-04-15 10:04 ` [PATCH 3/5] security: Pass xattrs allocated by LSMs to " Roberto Sassu 2021-04-15 10:04 ` Roberto Sassu 2021-04-15 10:04 ` Roberto Sassu [this message] 2021-04-15 10:04 ` [PATCH 4/5] evm: Align evm_inode_init_security() definition with LSM infrastructure Roberto Sassu 2021-04-15 10:04 ` [PATCH 5/5] evm: Support multiple LSMs providing an xattr Roberto Sassu 2021-04-15 10:04 ` Roberto Sassu 2021-04-15 20:43 ` [PATCH 0/5] evm: Prepare for moving to the LSM infrastructure Casey Schaufler 2021-04-16 16:37 ` Roberto Sassu 2021-04-16 21:25 ` Casey Schaufler 2021-04-20 16:09 ` Roberto Sassu
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