From: Casey Schaufler <casey@schaufler-ca.com>
To: casey.schaufler@intel.com, jmorris@namei.org,
linux-security-module@vger.kernel.org, selinux@vger.kernel.org
Cc: casey@schaufler-ca.com, keescook@chromium.org,
john.johansen@canonical.com, penguin-kernel@i-love.sakura.ne.jp,
paul@paul-moore.com, sds@tycho.nsa.gov, linux-audit@redhat.com,
linux-integrity@vger.kernel.org
Subject: [PATCH 10/25] LSM: Use lsmblob in security_inode_getsecid
Date: Tue, 12 Nov 2019 16:08:58 -0800 [thread overview]
Message-ID: <20191113000913.5414-11-casey@schaufler-ca.com> (raw)
In-Reply-To: <20191113000913.5414-1-casey@schaufler-ca.com>
Change the security_inode_getsecid() interface to fill in a
lsmblob structure instead of a u32 secid. This allows for its
callers to gather data from all registered LSMs. Data is provided
for IMA and audit.
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
cc: linux-audit@redhat.com
cc: linux-integrity@vger.kernel.org
---
include/linux/security.h | 7 ++++---
kernel/auditsc.c | 6 +++++-
security/integrity/ima/ima_policy.c | 4 +---
security/security.c | 11 +++++++++--
4 files changed, 19 insertions(+), 9 deletions(-)
diff --git a/include/linux/security.h b/include/linux/security.h
index 67f95a335b5d..a845254fc415 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -407,7 +407,7 @@ int security_inode_killpriv(struct dentry *dentry);
int security_inode_getsecurity(struct inode *inode, const char *name, void **buffer, bool alloc);
int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags);
int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size);
-void security_inode_getsecid(struct inode *inode, u32 *secid);
+void security_inode_getsecid(struct inode *inode, struct lsmblob *blob);
int security_inode_copy_up(struct dentry *src, struct cred **new);
int security_inode_copy_up_xattr(const char *name);
int security_kernfs_init_security(struct kernfs_node *kn_dir,
@@ -922,9 +922,10 @@ static inline int security_inode_listsecurity(struct inode *inode, char *buffer,
return 0;
}
-static inline void security_inode_getsecid(struct inode *inode, u32 *secid)
+static inline void security_inode_getsecid(struct inode *inode,
+ struct lsmblob *blob)
{
- *secid = 0;
+ lsmblob_init(blob, 0);
}
static inline int security_inode_copy_up(struct dentry *src, struct cred **new)
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index cccb681ad081..5752e51883d5 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -1931,13 +1931,17 @@ static void audit_copy_inode(struct audit_names *name,
const struct dentry *dentry,
struct inode *inode, unsigned int flags)
{
+ struct lsmblob blob;
+
name->ino = inode->i_ino;
name->dev = inode->i_sb->s_dev;
name->mode = inode->i_mode;
name->uid = inode->i_uid;
name->gid = inode->i_gid;
name->rdev = inode->i_rdev;
- security_inode_getsecid(inode, &name->osid);
+ security_inode_getsecid(inode, &blob);
+ /* scaffolding until osid is updated */
+ name->osid = blob.secid[0];
if (flags & AUDIT_INODE_NOEVAL) {
name->fcap_ver = -1;
return;
diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c
index 7711cc6a3fe3..c5417045e165 100644
--- a/security/integrity/ima/ima_policy.c
+++ b/security/integrity/ima/ima_policy.c
@@ -413,7 +413,6 @@ static bool ima_match_rules(struct ima_rule_entry *rule, struct inode *inode,
return false;
for (i = 0; i < MAX_LSM_RULES; i++) {
int rc = 0;
- u32 osid;
struct lsmblob blob;
if (!rule->lsm[i].rule)
@@ -423,8 +422,7 @@ static bool ima_match_rules(struct ima_rule_entry *rule, struct inode *inode,
case LSM_OBJ_USER:
case LSM_OBJ_ROLE:
case LSM_OBJ_TYPE:
- security_inode_getsecid(inode, &osid);
- lsmblob_init(&blob, osid);
+ security_inode_getsecid(inode, &blob);
rc = security_filter_rule_match(&blob,
rule->lsm[i].type,
Audit_equal,
diff --git a/security/security.c b/security/security.c
index e1f216d453bf..bd279a24adfc 100644
--- a/security/security.c
+++ b/security/security.c
@@ -1386,9 +1386,16 @@ int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer
}
EXPORT_SYMBOL(security_inode_listsecurity);
-void security_inode_getsecid(struct inode *inode, u32 *secid)
+void security_inode_getsecid(struct inode *inode, struct lsmblob *blob)
{
- call_void_hook(inode_getsecid, inode, secid);
+ struct security_hook_list *hp;
+
+ lsmblob_init(blob, 0);
+ hlist_for_each_entry(hp, &security_hook_heads.inode_getsecid, list) {
+ if (WARN_ON(hp->lsmid->slot < 0 || hp->lsmid->slot >= lsm_slot))
+ continue;
+ hp->hook.inode_getsecid(inode, &blob->secid[hp->lsmid->slot]);
+ }
}
int security_inode_copy_up(struct dentry *src, struct cred **new)
--
2.20.1
next prev parent reply other threads:[~2019-11-13 0:10 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20191113000913.5414-1-casey.ref@schaufler-ca.com>
2019-11-13 0:08 ` [PATCH v10 00/25] LSM: Module stacking for AppArmor Casey Schaufler
2019-11-13 0:08 ` [PATCH 01/25] LSM: Infrastructure management of the sock security Casey Schaufler
2019-11-13 0:08 ` [PATCH 02/25] LSM: Create and manage the lsmblob data structure Casey Schaufler
2019-11-13 0:08 ` [PATCH 03/25] LSM: Use lsmblob in security_audit_rule_match Casey Schaufler
2019-11-13 0:08 ` [PATCH 04/25] LSM: Use lsmblob in security_kernel_act_as Casey Schaufler
2019-11-13 0:08 ` [PATCH 05/25] net: Prepare UDS for security module stacking Casey Schaufler
2019-11-13 0:08 ` [PATCH 06/25] LSM: Use lsmblob in security_secctx_to_secid Casey Schaufler
2019-11-13 0:08 ` [PATCH 07/25] LSM: Use lsmblob in security_secid_to_secctx Casey Schaufler
2019-11-13 0:08 ` [PATCH 08/25] LSM: Use lsmblob in security_ipc_getsecid Casey Schaufler
2019-11-13 0:08 ` [PATCH 09/25] LSM: Use lsmblob in security_task_getsecid Casey Schaufler
2019-11-13 0:08 ` Casey Schaufler [this message]
2019-11-13 0:08 ` [PATCH 11/25] LSM: Use lsmblob in security_cred_getsecid Casey Schaufler
2019-11-13 0:09 ` [PATCH 12/25] IMA: Change internal interfaces to use lsmblobs Casey Schaufler
2019-11-13 0:09 ` [PATCH 13/25] LSM: Specify which LSM to display Casey Schaufler
2019-11-13 0:09 ` [PATCH 14/25] LSM: Ensure the correct LSM context releaser Casey Schaufler
2019-11-13 0:09 ` [PATCH 15/25] LSM: Use lsmcontext in security_secid_to_secctx Casey Schaufler
2019-11-13 0:09 ` [PATCH 16/25] LSM: Use lsmcontext in security_dentry_init_security Casey Schaufler
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