[13/59] LSM: Use lsm_export in the secctx_to_secid hooks

Message ID	20190409213946.1667-14-casey@schaufler-ca.com (mailing list archive)
State	Not Applicable
Headers	show Return-Path: <selinux-owner@kernel.org> 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 Subject: [PATCH 13/59] LSM: Use lsm_export in the secctx_to_secid hooks Date: Tue, 9 Apr 2019 14:39:00 -0700 Message-Id: <20190409213946.1667-14-casey@schaufler-ca.com> In-Reply-To: <20190409213946.1667-1-casey@schaufler-ca.com> References: <20190409213946.1667-1-casey@schaufler-ca.com> Sender: selinux-owner@vger.kernel.org Precedence: bulk
Series	LSM: Module stacking for AppArmor \| expand [00/59] LSM: Module stacking for AppArmor [01/59] LSM: Infrastructure management of the superblock [02/59] LSM: Infrastructure management of the sock security [03/59] LSM: Infrastructure management of the key security blob [04/59] LSM: Create an lsm_export data structure. [05/59] LSM: Use lsm_export in the inode_getsecid hooks [06/59] LSM: Use lsm_export in the cred_getsecid hooks [07/59] LSM: Use lsm_export in the ipc_getsecid and task_getsecid hooks [08/59] LSM: Use lsm_export in the kernel_ask_as hooks [09/59] LSM: Use lsm_export in the getpeersec_dgram hooks [10/59] LSM: Use lsm_export in the audit_rule_match hooks [11/59] LSM: Fix logical operation in lsm_export checks [12/59] LSM: Use lsm_export in the secid_to_secctx hooks [13/59] LSM: Use lsm_export in the secctx_to_secid hooks [14/59] LSM: Use lsm_export in security_audit_rule_match [15/59] LSM: Use lsm_export in security_kernel_act_as [16/59] LSM: Use lsm_export in security_socket_getpeersec_dgram [17/59] LSM: Use lsm_export in security_secctx_to_secid [18/59] LSM: Use lsm_export in security_secid_to_secctx [19/59] LSM: Use lsm_export in security_ipc_getsecid [20/59] LSM: Use lsm_export in security_task_getsecid [21/59] LSM: Use lsm_export in security_inode_getsecid [22/59] LSM: Use lsm_export in security_cred_getsecid [23/59] Audit: Change audit_sig_sid to audit_sig_lsm [24/59] Audit: Convert target_sid to an lsm_export structure [25/59] Audit: Convert osid to an lsm_export structure [26/59] IMA: Clean out lsm_export scaffolding [27/59] NET: Store LSM access information in the socket blob for UDS [28/59] NET: Remove scaffolding on secmarks [29/59] NET: Remove scaffolding on new secmarks [30/59] NET: Remove netfilter scaffolding for lsm_export [31/59] Netlabel: Replace secids with lsm_export [32/59] LSM: Remove lsm_export scaffolding functions [33/59] IMA: FIXUP prototype using lsm_export [34/59] Smack: Restore the release_secctx hook [35/59] AppArmor: Remove unnecessary hook stub [36/59] LSM: Limit calls to certain module hooks [37/59] LSM: Create a data structure for a security context [38/59] LSM: Use lsm_context in secid_to_secctx hooks [39/59] LSM: Use lsm_context in secctx_to_secid hooks [40/59] LSM: Use lsm_context in inode_getsecctx hooks [41/59] LSM: Use lsm_context in inode_notifysecctx hooks [42/59] LSM: Use lsm_context in dentry_init_security hooks [43/59] LSM: Use lsm_context in security_dentry_init_security [44/59] LSM: Use lsm_context in security_inode_notifysecctx [45/59] LSM: Use lsm_context in security_inode_getsecctx [46/59] LSM: Use lsm_context in security_secctx_to_secid [47/59] LSM: Use lsm_context in release_secctx hooks [48/59] LSM: Use lsm_context in security_release_secctx [49/59] LSM: Use lsm_context in security_secid_to_secctx [50/59] fs: remove lsm_context scaffolding [51/59] LSM: Add the release function to the lsm_context [52/59] LSM: Use lsm_context in inode_setsecctx hooks [53/59] LSM: Use lsm_context in security_inode_setsecctx [54/59] kernfs: remove lsm_context scaffolding [55/59] LSM: Remove unused macro [56/59] LSM: Special handling for secctx lsm hooks [57/59] SELinux: Use blob offset in current_sid [58/59] LSM: Specify which LSM to display with /proc/self/attr/display [59/59] AppArmor: Remove the exclusive flag

Message ID

20190409213946.1667-14-casey@schaufler-ca.com (mailing list archive)

State

Not Applicable

Headers

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
Subject: [PATCH 13/59] LSM: Use lsm_export in the secctx_to_secid hooks
Date: Tue,  9 Apr 2019 14:39:00 -0700
Message-Id: <20190409213946.1667-14-casey@schaufler-ca.com>
In-Reply-To: <20190409213946.1667-1-casey@schaufler-ca.com>
References: <20190409213946.1667-1-casey@schaufler-ca.com>
Sender: selinux-owner@vger.kernel.org
Precedence: bulk

Series

LSM: Module stacking for AppArmor | expand

Commit Message

Casey Schaufler April 9, 2019, 9:39 p.m. UTC

Convert the secctx_to_secid hooks to use the lsm_export
structure instead of a u32 secid. There is some scaffolding
involved that will be removed when security_secctx_to_secid()
is updated.

Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
---
 include/linux/lsm_hooks.h         |  7 ++++---
 security/apparmor/include/secid.h |  3 ++-
 security/apparmor/secid.c         |  9 +++++----
 security/security.c               |  8 ++++++--
 security/selinux/hooks.c          | 12 +++++++++---
 security/smack/smack_lsm.c        |  7 ++++---
 6 files changed, 30 insertions(+), 16 deletions(-)

diff --git a/include/linux/lsm_hooks.h b/include/linux/lsm_hooks.h
index 11ace5c923bd..af0bcdf8fcfe 100644
--- a/include/linux/lsm_hooks.h
+++ b/include/linux/lsm_hooks.h
@@ -1327,8 +1327,8 @@ 
  *	context.
  *	@seclen pointer which contains the length of the data
  * @secctx_to_secid:
- *	Convert security context to secid.
- *	@secid contains the pointer to the generated security ID.
+ *	Convert security context to exported lsm data.
+ *	@l contains the pointer to the generated security data.
  *	@secdata contains the security context.
  *
  * @release_secctx:
@@ -1674,7 +1674,8 @@  union security_list_options {
 	int (*ismaclabel)(const char *name);
 	int (*secid_to_secctx)(struct lsm_export *l, char **secdata,
 				u32 *seclen);
-	int (*secctx_to_secid)(const char *secdata, u32 seclen, u32 *secid);
+	int (*secctx_to_secid)(const char *secdata, u32 seclen,
+				struct lsm_export *l);
 	void (*release_secctx)(char *secdata, u32 seclen);
 
 	void (*inode_invalidate_secctx)(struct inode *inode);
diff --git a/security/apparmor/include/secid.h b/security/apparmor/include/secid.h
index 03369183f512..5381eff03d4f 100644
--- a/security/apparmor/include/secid.h
+++ b/security/apparmor/include/secid.h
@@ -27,7 +27,8 @@  struct aa_label;
 
 struct aa_label *aa_secid_to_label(struct lsm_export *l);
 int apparmor_secid_to_secctx(struct lsm_export *l, char **secdata, u32 *seclen);
-int apparmor_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid);
+int apparmor_secctx_to_secid(const char *secdata, u32 seclen,
+			     struct lsm_export *l);
 void apparmor_release_secctx(char *secdata, u32 seclen);
 
 
diff --git a/security/apparmor/secid.c b/security/apparmor/secid.c
index ab4dc165e43e..69d98a89db75 100644
--- a/security/apparmor/secid.c
+++ b/security/apparmor/secid.c
@@ -75,9 +75,9 @@  struct aa_label *aa_secid_to_label(struct lsm_export *l)
 	return label;
 }
 
-static inline void aa_import_secid(struct lsm_export *l, u32 secid)
+static inline void aa_export_secid(struct lsm_export *l, u32 secid)
 {
-	l->flags = LSM_EXPORT_APPARMOR;
+	l->flags |= LSM_EXPORT_APPARMOR;
 	l->apparmor = secid;
 }
 
@@ -111,7 +111,8 @@  int apparmor_secid_to_secctx(struct lsm_export *l, char **secdata, u32 *seclen)
 	return 0;
 }
 
-int apparmor_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid)
+int apparmor_secctx_to_secid(const char *secdata, u32 seclen,
+			     struct lsm_export *l)
 {
 	struct aa_label *label;
 
@@ -119,7 +120,7 @@  int apparmor_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid)
 				    seclen, GFP_KERNEL, false, false);
 	if (IS_ERR(label))
 		return PTR_ERR(label);
-	*secid = label->secid;
+	aa_export_secid(l, label->secid);
 
 	return 0;
 }
diff --git a/security/security.c b/security/security.c
index adf4cb768665..1645ebe06715 100644
--- a/security/security.c
+++ b/security/security.c
@@ -2012,8 +2012,12 @@  EXPORT_SYMBOL(security_secid_to_secctx);
 
 int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid)
 {
-	*secid = 0;
-	return call_int_hook(secctx_to_secid, 0, secdata, seclen, secid);
+	struct lsm_export data = { .flags = LSM_EXPORT_NONE };
+	int rc;
+
+	rc = call_int_hook(secctx_to_secid, 0, secdata, seclen, &data);
+	lsm_export_secid(&data, secid);
+	return rc;
 }
 EXPORT_SYMBOL(security_secctx_to_secid);
 
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 16d902158e8a..7dd333f133db 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -6311,10 +6311,16 @@  static int selinux_secid_to_secctx(struct lsm_export *l, char **secdata,
 				       secdata, seclen);
 }
 
-static int selinux_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid)
+static int selinux_secctx_to_secid(const char *secdata, u32 seclen,
+				   struct lsm_export *l)
 {
-	return security_context_to_sid(&selinux_state, secdata, seclen,
-				       secid, GFP_KERNEL);
+	u32 secid;
+	int rc;
+
+	rc = security_context_to_sid(&selinux_state, secdata, seclen,
+				     &secid, GFP_KERNEL);
+	selinux_export_secid(l, secid);
+	return rc;
 }
 
 static void selinux_release_secctx(char *secdata, u32 seclen)
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index 809af981f14c..ecd636e5c75c 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -4456,14 +4456,15 @@  static int smack_secid_to_secctx(struct lsm_export *l, char **secdata,
  *
  * Exists for audit and networking code.
  */
-static int smack_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid)
+static int smack_secctx_to_secid(const char *secdata, u32 seclen,
+				 struct lsm_export *l)
 {
 	struct smack_known *skp = smk_find_entry(secdata);
 
 	if (skp)
-		*secid = skp->smk_secid;
+		smack_export_secid(l, skp->smk_secid);
 	else
-		*secid = 0;
+		smack_export_secid(l, 0);
 	return 0;
 }

[13/59] LSM: Use lsm_export in the secctx_to_secid hooks

Commit Message

Patch