From: Casey Schaufler <casey@schaufler-ca.com>
To: casey@schaufler-ca.com, paul@paul-moore.com,
linux-security-module@vger.kernel.org
Cc: jmorris@namei.org, serge@hallyn.com, keescook@chromium.org,
john.johansen@canonical.com, penguin-kernel@i-love.sakura.ne.jp,
stephen.smalley.work@gmail.com, linux-kernel@vger.kernel.org,
selinux@vger.kernel.org, mic@digikod.net,
linux-integrity@vger.kernel.org
Subject: [PATCH v4 08/13] LSM: Use lsm_prop in security_inode_getsecid
Date: Wed, 9 Oct 2024 10:32:16 -0700 [thread overview]
Message-ID: <20241009173222.12219-9-casey@schaufler-ca.com> (raw)
In-Reply-To: <20241009173222.12219-1-casey@schaufler-ca.com>
Change the security_inode_getsecid() interface to fill in a
lsm_prop 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. Change the name to security_inode_getlsmprop().
Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
Cc: linux-integrity@vger.kernel.org
Cc: selinux@vger.kernel.org
---
include/linux/lsm_hook_defs.h | 3 ++-
include/linux/security.h | 7 ++++---
kernel/auditsc.c | 6 +++++-
security/integrity/ima/ima_policy.c | 3 +--
security/security.c | 11 +++++------
security/selinux/hooks.c | 15 +++++++++------
security/smack/smack_lsm.c | 12 +++++++-----
7 files changed, 33 insertions(+), 24 deletions(-)
diff --git a/include/linux/lsm_hook_defs.h b/include/linux/lsm_hook_defs.h
index 8a90fd9ff3c8..23ad7e4f8c67 100644
--- a/include/linux/lsm_hook_defs.h
+++ b/include/linux/lsm_hook_defs.h
@@ -176,7 +176,8 @@ LSM_HOOK(int, -EOPNOTSUPP, inode_setsecurity, struct inode *inode,
const char *name, const void *value, size_t size, int flags)
LSM_HOOK(int, 0, inode_listsecurity, struct inode *inode, char *buffer,
size_t buffer_size)
-LSM_HOOK(void, LSM_RET_VOID, inode_getsecid, struct inode *inode, u32 *secid)
+LSM_HOOK(void, LSM_RET_VOID, inode_getlsmprop, struct inode *inode,
+ struct lsm_prop *prop)
LSM_HOOK(int, 0, inode_copy_up, struct dentry *src, struct cred **new)
LSM_HOOK(int, -EOPNOTSUPP, inode_copy_up_xattr, struct dentry *src,
const char *name)
diff --git a/include/linux/security.h b/include/linux/security.h
index 9bc8153f4e8b..2b19ef5d799c 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -452,7 +452,7 @@ int security_inode_getsecurity(struct mnt_idmap *idmap,
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_getlsmprop(struct inode *inode, struct lsm_prop *prop);
int security_inode_copy_up(struct dentry *src, struct cred **new);
int security_inode_copy_up_xattr(struct dentry *src, const char *name);
int security_inode_setintegrity(const struct inode *inode,
@@ -1076,9 +1076,10 @@ 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_getlsmprop(struct inode *inode,
+ struct lsm_prop *prop)
{
- *secid = 0;
+ lsmprop_init(prop);
}
static inline int security_inode_copy_up(struct dentry *src, struct cred **new)
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 6b2b2a8d5647..372302f0528b 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -2276,13 +2276,17 @@ static void audit_copy_inode(struct audit_names *name,
const struct dentry *dentry,
struct inode *inode, unsigned int flags)
{
+ struct lsm_prop prop;
+
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_getlsmprop(inode, &prop);
+ /* scaffolding */
+ name->osid = prop.scaffold.secid;
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 a96dc3ff6aa0..dbfd554b4624 100644
--- a/security/integrity/ima/ima_policy.c
+++ b/security/integrity/ima/ima_policy.c
@@ -649,8 +649,7 @@ static bool ima_match_rules(struct ima_rule_entry *rule,
case LSM_OBJ_USER:
case LSM_OBJ_ROLE:
case LSM_OBJ_TYPE:
- /* scaffolding */
- security_inode_getsecid(inode, &prop.scaffold.secid);
+ security_inode_getlsmprop(inode, &prop);
rc = ima_filter_rule_match(&prop, lsm_rule->lsm[i].type,
Audit_equal,
lsm_rule->lsm[i].rule);
diff --git a/security/security.c b/security/security.c
index 5cdb5b171ff2..5e76e35dda09 100644
--- a/security/security.c
+++ b/security/security.c
@@ -2724,16 +2724,15 @@ int security_inode_listsecurity(struct inode *inode,
EXPORT_SYMBOL(security_inode_listsecurity);
/**
- * security_inode_getsecid() - Get an inode's secid
+ * security_inode_getlsmprop() - Get an inode's LSM data
* @inode: inode
- * @secid: secid to return
+ * @prop: lsm specific information to return
*
- * Get the secid associated with the node. In case of failure, @secid will be
- * set to zero.
+ * Get the lsm specific information associated with the node.
*/
-void security_inode_getsecid(struct inode *inode, u32 *secid)
+void security_inode_getlsmprop(struct inode *inode, struct lsm_prop *prop)
{
- call_void_hook(inode_getsecid, inode, secid);
+ call_void_hook(inode_getlsmprop, inode, prop);
}
/**
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 7d6ffd3483a8..a9f8d10062b5 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -3503,15 +3503,18 @@ static int selinux_inode_listsecurity(struct inode *inode, char *buffer, size_t
return len;
}
-static void selinux_inode_getsecid(struct inode *inode, u32 *secid)
+static void selinux_inode_getlsmprop(struct inode *inode, struct lsm_prop *prop)
{
struct inode_security_struct *isec = inode_security_novalidate(inode);
- *secid = isec->sid;
+
+ prop->selinux.secid = isec->sid;
+ /* scaffolding */
+ prop->scaffold.secid = isec->sid;
}
static int selinux_inode_copy_up(struct dentry *src, struct cred **new)
{
- u32 sid;
+ struct lsm_prop prop;
struct task_security_struct *tsec;
struct cred *new_creds = *new;
@@ -3523,8 +3526,8 @@ static int selinux_inode_copy_up(struct dentry *src, struct cred **new)
tsec = selinux_cred(new_creds);
/* Get label from overlay inode and set it in create_sid */
- selinux_inode_getsecid(d_inode(src), &sid);
- tsec->create_sid = sid;
+ selinux_inode_getlsmprop(d_inode(src), &prop);
+ tsec->create_sid = prop.selinux.secid;
*new = new_creds;
return 0;
}
@@ -7174,7 +7177,7 @@ static struct security_hook_list selinux_hooks[] __ro_after_init = {
LSM_HOOK_INIT(inode_getsecurity, selinux_inode_getsecurity),
LSM_HOOK_INIT(inode_setsecurity, selinux_inode_setsecurity),
LSM_HOOK_INIT(inode_listsecurity, selinux_inode_listsecurity),
- LSM_HOOK_INIT(inode_getsecid, selinux_inode_getsecid),
+ LSM_HOOK_INIT(inode_getlsmprop, selinux_inode_getlsmprop),
LSM_HOOK_INIT(inode_copy_up, selinux_inode_copy_up),
LSM_HOOK_INIT(inode_copy_up_xattr, selinux_inode_copy_up_xattr),
LSM_HOOK_INIT(path_notify, selinux_path_notify),
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index e74e22c4232f..5c3cb2837105 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -1649,15 +1649,17 @@ static int smack_inode_listsecurity(struct inode *inode, char *buffer,
}
/**
- * smack_inode_getsecid - Extract inode's security id
+ * smack_inode_getlsmprop - Extract inode's security id
* @inode: inode to extract the info from
- * @secid: where result will be saved
+ * @prop: where result will be saved
*/
-static void smack_inode_getsecid(struct inode *inode, u32 *secid)
+static void smack_inode_getlsmprop(struct inode *inode, struct lsm_prop *prop)
{
struct smack_known *skp = smk_of_inode(inode);
- *secid = skp->smk_secid;
+ prop->smack.skp = skp;
+ /* scaffolding */
+ prop->scaffold.secid = skp->smk_secid;
}
/*
@@ -5110,7 +5112,7 @@ static struct security_hook_list smack_hooks[] __ro_after_init = {
LSM_HOOK_INIT(inode_getsecurity, smack_inode_getsecurity),
LSM_HOOK_INIT(inode_setsecurity, smack_inode_setsecurity),
LSM_HOOK_INIT(inode_listsecurity, smack_inode_listsecurity),
- LSM_HOOK_INIT(inode_getsecid, smack_inode_getsecid),
+ LSM_HOOK_INIT(inode_getlsmprop, smack_inode_getlsmprop),
LSM_HOOK_INIT(file_alloc_security, smack_file_alloc_security),
LSM_HOOK_INIT(file_ioctl, smack_file_ioctl),
--
2.46.0
next prev parent reply other threads:[~2024-10-09 17:35 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20241009173222.12219-1-casey.ref@schaufler-ca.com>
2024-10-09 17:32 ` [PATCH v4 00/13] LSM: Move away from secids Casey Schaufler
2024-10-09 17:32 ` [PATCH v4 01/13] LSM: Add the lsm_prop data structure Casey Schaufler
2024-10-11 3:08 ` [PATCH v4 1/13] " Paul Moore
2024-10-11 15:45 ` Casey Schaufler
2024-10-11 7:36 ` [PATCH v4 01/13] " John Johansen
2024-10-09 17:32 ` [PATCH v4 02/13] LSM: Use lsm_prop in security_audit_rule_match Casey Schaufler
2024-10-09 17:32 ` [PATCH v4 03/13] LSM: Add lsmprop_to_secctx hook Casey Schaufler
2024-10-09 17:32 ` [PATCH v4 04/13] Audit: maintain an lsm_prop in audit_context Casey Schaufler
2024-10-11 3:08 ` [PATCH v4 4/13] " Paul Moore
2024-10-11 15:52 ` Casey Schaufler
2024-10-11 16:11 ` Paul Moore
2024-10-11 16:34 ` Casey Schaufler
2024-10-11 18:42 ` Paul Moore
2024-10-09 17:32 ` [PATCH v4 05/13] LSM: Use lsm_prop in security_ipc_getsecid Casey Schaufler
2024-10-11 3:08 ` [PATCH v4 5/13] " Paul Moore
2024-10-09 17:32 ` [PATCH v4 06/13] Audit: Update shutdown LSM data Casey Schaufler
2024-10-09 17:32 ` [PATCH v4 07/13] LSM: Use lsm_prop in security_current_getsecid Casey Schaufler
2024-10-09 17:32 ` Casey Schaufler [this message]
2024-10-09 17:32 ` [PATCH v4 09/13] Audit: use an lsm_prop in audit_names Casey Schaufler
2024-10-09 17:32 ` [PATCH v4 10/13] LSM: Create new security_cred_getlsmprop LSM hook Casey Schaufler
2024-10-09 17:32 ` [PATCH v4 11/13] Audit: Change context data from secid to lsm_prop Casey Schaufler
2024-10-09 17:32 ` [PATCH v4 12/13] Use lsm_prop for audit data Casey Schaufler
2024-10-09 17:32 ` [PATCH v4 13/13] LSM: Remove lsm_prop scaffolding Casey Schaufler
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20241009173222.12219-9-casey@schaufler-ca.com \
--to=casey@schaufler-ca.com \
--cc=jmorris@namei.org \
--cc=john.johansen@canonical.com \
--cc=keescook@chromium.org \
--cc=linux-integrity@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-security-module@vger.kernel.org \
--cc=mic@digikod.net \
--cc=paul@paul-moore.com \
--cc=penguin-kernel@i-love.sakura.ne.jp \
--cc=selinux@vger.kernel.org \
--cc=serge@hallyn.com \
--cc=stephen.smalley.work@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®