diff mbox series

[17/59] LSM: Use lsm_export in security_secctx_to_secid

Message ID 20190409213946.1667-18-casey@schaufler-ca.com (mailing list archive)
State Not Applicable
Headers show
Series LSM: Module stacking for AppArmor | expand

Commit Message

Casey Schaufler April 9, 2019, 9:39 p.m. UTC 
Convert security_secctx_to_secid to use the lsm_export structure
instead of a u32 secid. There is some scaffolding involved
that will be removed when the related data is updated.

Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
---
 include/linux/security.h          |  5 +++--
 kernel/cred.c                     |  4 +---
 net/netfilter/nft_meta.c          |  4 +++-
 net/netfilter/xt_SECMARK.c        |  5 +++--
 net/netlabel/netlabel_unlabeled.c |  8 ++++++--
 security/security.c               | 11 ++++-------
 6 files changed, 20 insertions(+), 17 deletions(-)
diff mbox series

Patch

diff --git a/include/linux/security.h b/include/linux/security.h
index e3f5c61b9b2c..991d2d2e290e 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -437,7 +437,8 @@  int security_setprocattr(const char *lsm, const char *name, void *value,
 int security_netlink_send(struct sock *sk, struct sk_buff *skb);
 int security_ismaclabel(const char *name);
 int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen);
-int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid);
+int security_secctx_to_secid(const char *secdata, u32 seclen,
+			     struct lsm_export *l);
 void security_release_secctx(char *secdata, u32 seclen);
 
 void security_inode_invalidate_secctx(struct inode *inode);
@@ -1220,7 +1221,7 @@  static inline int security_secid_to_secctx(u32 secid, char **secdata, u32 *secle
 
 static inline int security_secctx_to_secid(const char *secdata,
 					   u32 seclen,
-					   u32 *secid)
+					   struct lsm_export *l)
 {
 	return -EOPNOTSUPP;
 }
diff --git a/kernel/cred.c b/kernel/cred.c
index 40a3fde22667..7792538b1ca6 100644
--- a/kernel/cred.c
+++ b/kernel/cred.c
@@ -725,14 +725,12 @@  EXPORT_SYMBOL(set_security_override);
 int set_security_override_from_ctx(struct cred *new, const char *secctx)
 {
 	struct lsm_export le;
-	u32 secid;
 	int ret;
 
-	ret = security_secctx_to_secid(secctx, strlen(secctx), &secid);
+	ret = security_secctx_to_secid(secctx, strlen(secctx), &le);
 	if (ret < 0)
 		return ret;
 
-	lsm_export_to_all(&le, secid);
 	return set_security_override(new, &le);
 }
 EXPORT_SYMBOL(set_security_override_from_ctx);
diff --git a/net/netfilter/nft_meta.c b/net/netfilter/nft_meta.c
index 987d2d6ce624..598bea8e4799 100644
--- a/net/netfilter/nft_meta.c
+++ b/net/netfilter/nft_meta.c
@@ -576,13 +576,15 @@  static const struct nla_policy nft_secmark_policy[NFTA_SECMARK_MAX + 1] = {
 
 static int nft_secmark_compute_secid(struct nft_secmark *priv)
 {
+	struct lsm_export le;
 	u32 tmp_secid = 0;
 	int err;
 
-	err = security_secctx_to_secid(priv->ctx, strlen(priv->ctx), &tmp_secid);
+	err = security_secctx_to_secid(priv->ctx, strlen(priv->ctx), &le);
 	if (err)
 		return err;
 
+	lsm_export_secid(&le, &tmp_secid);
 	if (!tmp_secid)
 		return -ENOENT;
 
diff --git a/net/netfilter/xt_SECMARK.c b/net/netfilter/xt_SECMARK.c
index f16202d26c20..2def8d8898e6 100644
--- a/net/netfilter/xt_SECMARK.c
+++ b/net/netfilter/xt_SECMARK.c
@@ -49,13 +49,13 @@  secmark_tg(struct sk_buff *skb, const struct xt_action_param *par)
 
 static int checkentry_lsm(struct xt_secmark_target_info *info)
 {
+	struct lsm_export le;
 	int err;
 
 	info->secctx[SECMARK_SECCTX_MAX - 1] = '\0';
 	info->secid = 0;
 
-	err = security_secctx_to_secid(info->secctx, strlen(info->secctx),
-				       &info->secid);
+	err = security_secctx_to_secid(info->secctx, strlen(info->secctx), &le);
 	if (err) {
 		if (err == -EINVAL)
 			pr_info_ratelimited("invalid security context \'%s\'\n",
@@ -63,6 +63,7 @@  static int checkentry_lsm(struct xt_secmark_target_info *info)
 		return err;
 	}
 
+	lsm_export_secid(&le, &info->secid);
 	if (!info->secid) {
 		pr_info_ratelimited("unable to map security context \'%s\'\n",
 				    info->secctx);
diff --git a/net/netlabel/netlabel_unlabeled.c b/net/netlabel/netlabel_unlabeled.c
index c92894c3e40a..fc38934ccb35 100644
--- a/net/netlabel/netlabel_unlabeled.c
+++ b/net/netlabel/netlabel_unlabeled.c
@@ -896,6 +896,7 @@  static int netlbl_unlabel_staticadd(struct sk_buff *skb,
 	void *mask;
 	u32 addr_len;
 	u32 secid;
+	struct lsm_export le;
 	struct netlbl_audit audit_info;
 
 	/* Don't allow users to add both IPv4 and IPv6 addresses for a
@@ -919,10 +920,11 @@  static int netlbl_unlabel_staticadd(struct sk_buff *skb,
 	ret_val = security_secctx_to_secid(
 		                  nla_data(info->attrs[NLBL_UNLABEL_A_SECCTX]),
 				  nla_len(info->attrs[NLBL_UNLABEL_A_SECCTX]),
-				  &secid);
+				  &le);
 	if (ret_val != 0)
 		return ret_val;
 
+	lsm_export_secid(&le, &secid);
 	return netlbl_unlhsh_add(&init_net,
 				 dev_name, addr, mask, addr_len, secid,
 				 &audit_info);
@@ -947,6 +949,7 @@  static int netlbl_unlabel_staticadddef(struct sk_buff *skb,
 	void *mask;
 	u32 addr_len;
 	u32 secid;
+	struct lsm_export le;
 	struct netlbl_audit audit_info;
 
 	/* Don't allow users to add both IPv4 and IPv6 addresses for a
@@ -968,10 +971,11 @@  static int netlbl_unlabel_staticadddef(struct sk_buff *skb,
 	ret_val = security_secctx_to_secid(
 		                  nla_data(info->attrs[NLBL_UNLABEL_A_SECCTX]),
 				  nla_len(info->attrs[NLBL_UNLABEL_A_SECCTX]),
-				  &secid);
+				  &le);
 	if (ret_val != 0)
 		return ret_val;
 
+	lsm_export_secid(&le, &secid);
 	return netlbl_unlhsh_add(&init_net,
 				 NULL, addr, mask, addr_len, secid,
 				 &audit_info);
diff --git a/security/security.c b/security/security.c
index d8300a6400c3..868e9ae6b48c 100644
--- a/security/security.c
+++ b/security/security.c
@@ -1967,14 +1967,11 @@  int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
 }
 EXPORT_SYMBOL(security_secid_to_secctx);
 
-int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid)
+int security_secctx_to_secid(const char *secdata, u32 seclen,
+			     struct lsm_export *l)
 {
-	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;
+	lsm_export_init(l);
+	return call_int_hook(secctx_to_secid, 0, secdata, seclen, l);
 }
 EXPORT_SYMBOL(security_secctx_to_secid);