Merge tag 'selinux-pr-20220321' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux

Pull selinux updates from Paul Moore:
 "We've got a number of SELinux patches queued up, the highlights are:

   - Fixup the security_fs_context_parse_param() LSM hook so it executes
     all of the LSM hook implementations unless a serious error occurs.

     We also correct the SELinux hook implementation so that it returns
     zero on success.

   - In addition to a few SELinux mount option parsing fixes, we
     simplified the parsing by moving it earlier in the process.

     The logic was that it was unlikely an admin/user would use the new
     mount API and not have the policy loaded before passing the SELinux
     options.

   - Properly fixed the LSM/SELinux/SCTP hooks with the addition of the
     security_sctp_assoc_established() hook.

     This work was done in conjunction with the netdev folks and should
     complete the move of the SCTP labeling from the endpoints to the
     associations.

   - Fixed a variety of sparse warnings caused by changes in the "__rcu"
     markings of some core kernel structures.

   - Ensure we access the superblock's LSM security blob using the
     stacking-safe accessors.

   - Added the ability for the kernel to always allow FIOCLEX and
     FIONCLEX if the "ioctl_skip_cloexec" policy capability is
     specified.

   - Various constifications improvements, type casting improvements,
     additional return value checks, and dead code/parameter removal.

   - Documentation fixes"

* tag 'selinux-pr-20220321' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux: (23 commits)
  selinux: shorten the policy capability enum names
  docs: fix 'make htmldocs' warning in SCTP.rst
  selinux: allow FIOCLEX and FIONCLEX with policy capability
  selinux: use correct type for context length
  selinux: drop return statement at end of void functions
  security: implement sctp_assoc_established hook in selinux
  security: add sctp_assoc_established hook
  selinux: parse contexts for mount options early
  selinux: various sparse fixes
  selinux: try to use preparsed sid before calling parse_sid()
  selinux: Fix selinux_sb_mnt_opts_compat()
  LSM: general protection fault in legacy_parse_param
  selinux: fix a type cast problem in cred_init_security()
  selinux: drop unused macro
  selinux: simplify cred_init_security
  selinux: do not discard const qualifier in cast
  selinux: drop unused parameter of avtab_insert_node
  selinux: drop cast to same type
  selinux: enclose macro arguments in parenthesis
  selinux: declare name parameter of hash_eval const
  ...

Documentation/security/SCTP.rst

@@ -15,10 +15,7 @@ For security module support, three SCTP specific hooks have been implemented::
     security_sctp_assoc_request()
     security_sctp_bind_connect()
     security_sctp_sk_clone()
-
-Also the following security hook has been utilised::
-
-    security_inet_conn_established()
+    security_sctp_assoc_established()
 
 The usage of these hooks are described below with the SELinux implementation
 described in the `SCTP SELinux Support`_ chapter.
@@ -122,11 +119,12 @@ calls **sctp_peeloff**\(3).
     @newsk - pointer to new sock structure.
 
 
-security_inet_conn_established()
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-Called when a COOKIE ACK is received::
+security_sctp_assoc_established()
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Called when a COOKIE ACK is received, and the peer secid will be
+saved into ``@asoc->peer_secid`` for client::
 
-    @sk  - pointer to sock structure.
+    @asoc - pointer to sctp association structure.
     @skb - pointer to skbuff of the COOKIE ACK packet.
 
 
@@ -134,7 +132,7 @@ Security Hooks used for Association Establishment
 -------------------------------------------------
 
 The following diagram shows the use of ``security_sctp_bind_connect()``,
-``security_sctp_assoc_request()``, ``security_inet_conn_established()`` when
+``security_sctp_assoc_request()``, ``security_sctp_assoc_established()`` when
 establishing an association.
 ::
 
@@ -172,7 +170,7 @@ establishing an association.
           <------------------------------------------- COOKIE ACK
           |                                               |
     sctp_sf_do_5_1E_ca                                    |
- Call security_inet_conn_established()                    |
+ Call security_sctp_assoc_established()                   |
  to set the peer label.                                   |
           |                                               |
           |                               If SCTP_SOCKET_TCP or peeled off
@@ -198,7 +196,7 @@ hooks with the SELinux specifics expanded below::
     security_sctp_assoc_request()
     security_sctp_bind_connect()
     security_sctp_sk_clone()
-    security_inet_conn_established()
+    security_sctp_assoc_established()
 
 
 security_sctp_assoc_request()
@@ -271,12 +269,12 @@ sockets sid and peer sid to that contained in the ``@asoc sid`` and
     @newsk - pointer to new sock structure.
 
 
-security_inet_conn_established()
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+security_sctp_assoc_established()
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 Called when a COOKIE ACK is received where it sets the connection's peer sid
 to that in ``@skb``::
 
-    @sk  - pointer to sock structure.
+    @asoc - pointer to sctp association structure.
     @skb - pointer to skbuff of the COOKIE ACK packet.
 
 

include/linux/lsm_hook_defs.h

@@ -332,6 +332,8 @@ LSM_HOOK(int, 0, sctp_bind_connect, struct sock *sk, int optname,
 	 struct sockaddr *address, int addrlen)
 LSM_HOOK(void, LSM_RET_VOID, sctp_sk_clone, struct sctp_association *asoc,
 	 struct sock *sk, struct sock *newsk)
+LSM_HOOK(int, 0, sctp_assoc_established, struct sctp_association *asoc,
+	 struct sk_buff *skb)
 #endif /* CONFIG_SECURITY_NETWORK */
 
 #ifdef CONFIG_SECURITY_INFINIBAND

include/linux/lsm_hooks.h

@@ -1046,6 +1046,11 @@
  *	@asoc pointer to current sctp association structure.
  *	@sk pointer to current sock structure.
  *	@newsk pointer to new sock structure.
+ * @sctp_assoc_established:
+ *	Passes the @asoc and @chunk->skb of the association COOKIE_ACK packet
+ *	to the security module.
+ *	@asoc pointer to sctp association structure.
+ *	@skb pointer to skbuff of association packet.
  *
  * Security hooks for Infiniband
  *

include/linux/security.h

@@ -1422,6 +1422,8 @@ int security_sctp_bind_connect(struct sock *sk, int optname,
 			       struct sockaddr *address, int addrlen);
 void security_sctp_sk_clone(struct sctp_association *asoc, struct sock *sk,
 			    struct sock *newsk);
+int security_sctp_assoc_established(struct sctp_association *asoc,
+				    struct sk_buff *skb);
 
 #else	/* CONFIG_SECURITY_NETWORK */
 static inline int security_unix_stream_connect(struct sock *sock,
@@ -1641,6 +1643,12 @@ static inline void security_sctp_sk_clone(struct sctp_association *asoc,
 					  struct sock *newsk)
 {
 }
+
+static inline int security_sctp_assoc_established(struct sctp_association *asoc,
+						  struct sk_buff *skb)
+{
+	return 0;
+}
 #endif	/* CONFIG_SECURITY_NETWORK */
 
 #ifdef CONFIG_SECURITY_INFINIBAND

net/sctp/sm_statefuns.c

@@ -930,6 +930,11 @@ enum sctp_disposition sctp_sf_do_5_1E_ca(struct net *net,
 	if (!sctp_vtag_verify(chunk, asoc))
 		return sctp_sf_pdiscard(net, ep, asoc, type, arg, commands);
 
+	/* Set peer label for connection. */
+	if (security_sctp_assoc_established((struct sctp_association *)asoc,
+					    chunk->skb))
+		return sctp_sf_pdiscard(net, ep, asoc, type, arg, commands);
+
 	/* Verify that the chunk length for the COOKIE-ACK is OK.
 	 * If we don't do this, any bundled chunks may be junked.
 	 */
@@ -945,9 +950,6 @@ enum sctp_disposition sctp_sf_do_5_1E_ca(struct net *net,
 	 */
 	sctp_add_cmd_sf(commands, SCTP_CMD_INIT_COUNTER_RESET, SCTP_NULL());
 
-	/* Set peer label for connection. */
-	security_inet_conn_established(ep->base.sk, chunk->skb);
-
 	/* RFC 2960 5.1 Normal Establishment of an Association
 	 *
 	 * E) Upon reception of the COOKIE ACK, endpoint "A" will move

security/security.c

@@ -884,9 +884,22 @@ int security_fs_context_dup(struct fs_context *fc, struct fs_context *src_fc)
 	return call_int_hook(fs_context_dup, 0, fc, src_fc);
 }
 
-int security_fs_context_parse_param(struct fs_context *fc, struct fs_parameter *param)
+int security_fs_context_parse_param(struct fs_context *fc,
+				    struct fs_parameter *param)
 {
-	return call_int_hook(fs_context_parse_param, -ENOPARAM, fc, param);
+	struct security_hook_list *hp;
+	int trc;
+	int rc = -ENOPARAM;
+
+	hlist_for_each_entry(hp, &security_hook_heads.fs_context_parse_param,
+			     list) {
+		trc = hp->hook.fs_context_parse_param(fc, param);
+		if (trc == 0)
+			rc = 0;
+		else if (trc != -ENOPARAM)
+			return trc;
+	}
+	return rc;
 }
 
 int security_sb_alloc(struct super_block *sb)
@@ -2391,6 +2404,13 @@ void security_sctp_sk_clone(struct sctp_association *asoc, struct sock *sk,
 }
 EXPORT_SYMBOL(security_sctp_sk_clone);
 
+int security_sctp_assoc_established(struct sctp_association *asoc,
+				    struct sk_buff *skb)
+{
+	return call_int_hook(sctp_assoc_established, 0, asoc, skb);
+}
+EXPORT_SYMBOL(security_sctp_assoc_established);
+
 #endif	/* CONFIG_SECURITY_NETWORK */
 
 #ifdef CONFIG_SECURITY_INFINIBAND

security/selinux/ibpkey.c

@@ -104,7 +104,7 @@ static void sel_ib_pkey_insert(struct sel_ib_pkey *pkey)
 
 		tail = list_entry(
 			rcu_dereference_protected(
-				sel_ib_pkey_hash[idx].list.prev,
+				list_tail_rcu(&sel_ib_pkey_hash[idx].list),
 				lockdep_is_held(&sel_ib_pkey_lock)),
 			struct sel_ib_pkey, list);
 		list_del_rcu(&tail->list);

security/selinux/ima.c

@@ -29,7 +29,7 @@ static char *selinux_ima_collect_state(struct selinux_state *state)
 	buf_len = strlen("initialized=0;enforcing=0;checkreqprot=0;") + 1;
 
 	len = strlen(on);
-	for (i = 0; i < __POLICYDB_CAPABILITY_MAX; i++)
+	for (i = 0; i < __POLICYDB_CAP_MAX; i++)
 		buf_len += strlen(selinux_policycap_names[i]) + len;
 
 	buf = kzalloc(buf_len, GFP_KERNEL);
@@ -54,7 +54,7 @@ static char *selinux_ima_collect_state(struct selinux_state *state)
 	rc = strlcat(buf, checkreqprot_get(state) ? on : off, buf_len);
 	WARN_ON(rc >= buf_len);
 
-	for (i = 0; i < __POLICYDB_CAPABILITY_MAX; i++) {
+	for (i = 0; i < __POLICYDB_CAP_MAX; i++) {
 		rc = strlcat(buf, selinux_policycap_names[i], buf_len);
 		WARN_ON(rc >= buf_len);
 

security/selinux/include/policycap.h

@@ -4,17 +4,18 @@
 
 /* Policy capabilities */
 enum {
-	POLICYDB_CAPABILITY_NETPEER,
-	POLICYDB_CAPABILITY_OPENPERM,
-	POLICYDB_CAPABILITY_EXTSOCKCLASS,
-	POLICYDB_CAPABILITY_ALWAYSNETWORK,
-	POLICYDB_CAPABILITY_CGROUPSECLABEL,
-	POLICYDB_CAPABILITY_NNP_NOSUID_TRANSITION,
-	POLICYDB_CAPABILITY_GENFS_SECLABEL_SYMLINKS,
-	__POLICYDB_CAPABILITY_MAX
+	POLICYDB_CAP_NETPEER,
+	POLICYDB_CAP_OPENPERM,
+	POLICYDB_CAP_EXTSOCKCLASS,
+	POLICYDB_CAP_ALWAYSNETWORK,
+	POLICYDB_CAP_CGROUPSECLABEL,
+	POLICYDB_CAP_NNP_NOSUID_TRANSITION,
+	POLICYDB_CAP_GENFS_SECLABEL_SYMLINKS,
+	POLICYDB_CAP_IOCTL_SKIP_CLOEXEC,
+	__POLICYDB_CAP_MAX
 };
-#define POLICYDB_CAPABILITY_MAX (__POLICYDB_CAPABILITY_MAX - 1)
+#define POLICYDB_CAP_MAX (__POLICYDB_CAP_MAX - 1)
 
-extern const char *selinux_policycap_names[__POLICYDB_CAPABILITY_MAX];
+extern const char *selinux_policycap_names[__POLICYDB_CAP_MAX];
 
 #endif /* _SELINUX_POLICYCAP_H_ */

security/selinux/include/policycap_names.h

@@ -5,14 +5,15 @@
 #include "policycap.h"
 
 /* Policy capability names */
-const char *selinux_policycap_names[__POLICYDB_CAPABILITY_MAX] = {
+const char *selinux_policycap_names[__POLICYDB_CAP_MAX] = {
 	"network_peer_controls",
 	"open_perms",
 	"extended_socket_class",
 	"always_check_network",
 	"cgroup_seclabel",
 	"nnp_nosuid_transition",
-	"genfs_seclabel_symlinks"
+	"genfs_seclabel_symlinks",
+	"ioctl_skip_cloexec"
 };
 
 #endif /* _SELINUX_POLICYCAP_NAMES_H_ */

security/selinux/include/security.h

@@ -96,7 +96,7 @@ struct selinux_state {
 #endif
 	bool checkreqprot;
 	bool initialized;
-	bool policycap[__POLICYDB_CAPABILITY_MAX];
+	bool policycap[__POLICYDB_CAP_MAX];
 
 	struct page *status_page;
 	struct mutex status_lock;
@@ -174,49 +174,56 @@ static inline bool selinux_policycap_netpeer(void)
 {
 	struct selinux_state *state = &selinux_state;
 
-	return READ_ONCE(state->policycap[POLICYDB_CAPABILITY_NETPEER]);
+	return READ_ONCE(state->policycap[POLICYDB_CAP_NETPEER]);
 }
 
 static inline bool selinux_policycap_openperm(void)
 {
 	struct selinux_state *state = &selinux_state;
 
-	return READ_ONCE(state->policycap[POLICYDB_CAPABILITY_OPENPERM]);
+	return READ_ONCE(state->policycap[POLICYDB_CAP_OPENPERM]);
 }
 
 static inline bool selinux_policycap_extsockclass(void)
 {
 	struct selinux_state *state = &selinux_state;
 
-	return READ_ONCE(state->policycap[POLICYDB_CAPABILITY_EXTSOCKCLASS]);
+	return READ_ONCE(state->policycap[POLICYDB_CAP_EXTSOCKCLASS]);
 }
 
 static inline bool selinux_policycap_alwaysnetwork(void)
 {
 	struct selinux_state *state = &selinux_state;
 
-	return READ_ONCE(state->policycap[POLICYDB_CAPABILITY_ALWAYSNETWORK]);
+	return READ_ONCE(state->policycap[POLICYDB_CAP_ALWAYSNETWORK]);
 }
 
 static inline bool selinux_policycap_cgroupseclabel(void)
 {
 	struct selinux_state *state = &selinux_state;
 
-	return READ_ONCE(state->policycap[POLICYDB_CAPABILITY_CGROUPSECLABEL]);
+	return READ_ONCE(state->policycap[POLICYDB_CAP_CGROUPSECLABEL]);
 }
 
 static inline bool selinux_policycap_nnp_nosuid_transition(void)
 {
 	struct selinux_state *state = &selinux_state;
 
-	return READ_ONCE(state->policycap[POLICYDB_CAPABILITY_NNP_NOSUID_TRANSITION]);
+	return READ_ONCE(state->policycap[POLICYDB_CAP_NNP_NOSUID_TRANSITION]);
 }
 
 static inline bool selinux_policycap_genfs_seclabel_symlinks(void)
 {
 	struct selinux_state *state = &selinux_state;
 
-	return READ_ONCE(state->policycap[POLICYDB_CAPABILITY_GENFS_SECLABEL_SYMLINKS]);
+	return READ_ONCE(state->policycap[POLICYDB_CAP_GENFS_SECLABEL_SYMLINKS]);
+}
+
+static inline bool selinux_policycap_ioctl_skip_cloexec(void)
+{
+	struct selinux_state *state = &selinux_state;
+
+	return READ_ONCE(state->policycap[POLICYDB_CAP_IOCTL_SKIP_CLOEXEC]);
 }
 
 struct selinux_policy_convert_data;
@@ -254,8 +261,8 @@ struct av_decision {
 #define XPERMS_AUDITALLOW 2
 #define XPERMS_DONTAUDIT 4
 
-#define security_xperm_set(perms, x) (perms[x >> 5] |= 1 << (x & 0x1f))
-#define security_xperm_test(perms, x) (1 & (perms[x >> 5] >> (x & 0x1f)))
+#define security_xperm_set(perms, x) ((perms)[(x) >> 5] |= 1 << ((x) & 0x1f))
+#define security_xperm_test(perms, x) (1 & ((perms)[(x) >> 5] >> ((x) & 0x1f)))
 struct extended_perms_data {
 	u32 p[8];
 };
@@ -386,11 +393,11 @@ int security_get_allow_unknown(struct selinux_state *state);
 int security_fs_use(struct selinux_state *state, struct super_block *sb);
 
 int security_genfs_sid(struct selinux_state *state,
-		       const char *fstype, char *name, u16 sclass,
+		       const char *fstype, const char *path, u16 sclass,
 		       u32 *sid);
 
 int selinux_policy_genfs_sid(struct selinux_policy *policy,
-		       const char *fstype, char *name, u16 sclass,
+		       const char *fstype, const char *path, u16 sclass,
 		       u32 *sid);
 
 #ifdef CONFIG_NETLABEL

security/selinux/netnode.c

@@ -107,7 +107,7 @@ static struct sel_netnode *sel_netnode_find(const void *addr, u16 family)
 
 	switch (family) {
 	case PF_INET:
-		idx = sel_netnode_hashfn_ipv4(*(__be32 *)addr);
+		idx = sel_netnode_hashfn_ipv4(*(const __be32 *)addr);
 		break;
 	case PF_INET6:
 		idx = sel_netnode_hashfn_ipv6(addr);
@@ -121,7 +121,7 @@ static struct sel_netnode *sel_netnode_find(const void *addr, u16 family)
 		if (node->nsec.family == family)
 			switch (family) {
 			case PF_INET:
-				if (node->nsec.addr.ipv4 == *(__be32 *)addr)
+				if (node->nsec.addr.ipv4 == *(const __be32 *)addr)
 					return node;
 				break;
 			case PF_INET6:
@@ -164,7 +164,8 @@ static void sel_netnode_insert(struct sel_netnode *node)
 	if (sel_netnode_hash[idx].size == SEL_NETNODE_HASH_BKT_LIMIT) {
 		struct sel_netnode *tail;
 		tail = list_entry(
-			rcu_dereference_protected(sel_netnode_hash[idx].list.prev,
+			rcu_dereference_protected(
+				list_tail_rcu(&sel_netnode_hash[idx].list),
 				lockdep_is_held(&sel_netnode_lock)),
 			struct sel_netnode, list);
 		list_del_rcu(&tail->list);

security/selinux/netport.c

@@ -113,7 +113,7 @@ static void sel_netport_insert(struct sel_netport *port)
 		struct sel_netport *tail;
 		tail = list_entry(
 			rcu_dereference_protected(
-				sel_netport_hash[idx].list.prev,
+				list_tail_rcu(&sel_netport_hash[idx].list),
 				lockdep_is_held(&sel_netport_lock)),
 			struct sel_netport, list);
 		list_del_rcu(&tail->list);

security/selinux/selinuxfs.c

@@ -1983,7 +1983,7 @@ static int sel_make_policycap(struct selinux_fs_info *fsi)
 	struct dentry *dentry = NULL;
 	struct inode *inode = NULL;
 
-	for (iter = 0; iter <= POLICYDB_CAPABILITY_MAX; iter++) {
+	for (iter = 0; iter <= POLICYDB_CAP_MAX; iter++) {
 		if (iter < ARRAY_SIZE(selinux_policycap_names))
 			dentry = d_alloc_name(fsi->policycap_dir,
 					      selinux_policycap_names[iter]);
@@ -2127,6 +2127,8 @@ static int sel_fill_super(struct super_block *sb, struct fs_context *fc)
 	}
 
 	ret = sel_make_avc_files(dentry);
+	if (ret)
+		goto err;
 
 	dentry = sel_make_dir(sb->s_root, "ss", &fsi->last_ino);
 	if (IS_ERR(dentry)) {

security/selinux/ss/avtab.c

@@ -67,7 +67,7 @@ static inline int avtab_hash(const struct avtab_key *keyp, u32 mask)
 
 static struct avtab_node*
 avtab_insert_node(struct avtab *h, int hvalue,
-		  struct avtab_node *prev, struct avtab_node *cur,
+		  struct avtab_node *prev,
 		  const struct avtab_key *key, const struct avtab_datum *datum)
 {
 	struct avtab_node *newnode;
@@ -137,7 +137,7 @@ static int avtab_insert(struct avtab *h, const struct avtab_key *key,
 			break;
 	}
 
-	newnode = avtab_insert_node(h, hvalue, prev, cur, key, datum);
+	newnode = avtab_insert_node(h, hvalue, prev, key, datum);
 	if (!newnode)
 		return -ENOMEM;
 
@@ -177,7 +177,7 @@ struct avtab_node *avtab_insert_nonunique(struct avtab *h,
 		    key->target_class < cur->key.target_class)
 			break;
 	}
-	return avtab_insert_node(h, hvalue, prev, cur, key, datum);
+	return avtab_insert_node(h, hvalue, prev, key, datum);
 }
 
 struct avtab_datum *avtab_search(struct avtab *h, const struct avtab_key *key)

security/selinux/ss/conditional.c

@@ -567,8 +567,6 @@ void cond_compute_xperms(struct avtab *ctab, struct avtab_key *key,
 		if (node->key.specified & AVTAB_ENABLED)
 			services_compute_xperms_decision(xpermd, node);
 	}
-	return;
-
 }
 /* Determine whether additional permissions are granted by the conditional
  * av table, and if so, add them to the result

security/selinux/ss/ebitmap.c

@@ -359,7 +359,6 @@ void ebitmap_destroy(struct ebitmap *e)
 
 	e->highbit = 0;
 	e->node = NULL;
-	return;
 }
 
 int ebitmap_read(struct ebitmap *e, void *fp)

security/selinux/ss/ebitmap.h

@@ -118,9 +118,9 @@ static inline void ebitmap_node_clr_bit(struct ebitmap_node *n,
 }
 
 #define ebitmap_for_each_positive_bit(e, n, bit)	\
-	for (bit = ebitmap_start_positive(e, &n);	\
-	     bit < ebitmap_length(e);			\
-	     bit = ebitmap_next_positive(e, &n, bit))	\
+	for ((bit) = ebitmap_start_positive(e, &(n));	\
+	     (bit) < ebitmap_length(e);			\
+	     (bit) = ebitmap_next_positive(e, &(n), bit))	\
 
 int ebitmap_cmp(struct ebitmap *e1, struct ebitmap *e2);
 int ebitmap_cpy(struct ebitmap *dst, struct ebitmap *src);

security/selinux/ss/mls.c

@@ -156,7 +156,6 @@ void mls_sid_to_context(struct policydb *p,
 	}
 
 	*scontext = scontextp;
-	return;
 }
 
 int mls_level_isvalid(struct policydb *p, struct mls_level *l)

security/selinux/ss/policydb.c

@@ -41,8 +41,6 @@
 #include "mls.h"
 #include "services.h"
 
-#define _DEBUG_HASHES
-
 #ifdef DEBUG_HASHES
 static const char *symtab_name[SYM_NUM] = {
 	"common prefixes",
@@ -704,7 +702,7 @@ static void symtab_hash_eval(struct symtab *s)
 }
 
 #else
-static inline void hash_eval(struct hashtab *h, char *hash_name)
+static inline void hash_eval(struct hashtab *h, const char *hash_name)
 {
 }
 #endif

security/selinux/ss/services.c

@@ -529,8 +529,6 @@ static void security_dump_masked_av(struct policydb *policydb,
 	/* release scontext/tcontext */
 	kfree(tcontext_name);
 	kfree(scontext_name);
-
-	return;
 }
 
 /*
@@ -1452,7 +1450,7 @@ static int string_to_context_struct(struct policydb *pol,
 	/* Parse the security context. */
 
 	rc = -EINVAL;
-	scontextp = (char *) scontext;
+	scontextp = scontext;
 
 	/* Extract the user. */
 	p = scontextp;
@@ -2875,7 +2873,7 @@ int security_get_user_sids(struct selinux_state *state,
  */
 static inline int __security_genfs_sid(struct selinux_policy *policy,
 				       const char *fstype,
-				       char *path,
+				       const char *path,
 				       u16 orig_sclass,
 				       u32 *sid)
 {
@@ -2928,7 +2926,7 @@ static inline int __security_genfs_sid(struct selinux_policy *policy,
  */
 int security_genfs_sid(struct selinux_state *state,
 		       const char *fstype,
-		       char *path,
+		       const char *path,
 		       u16 orig_sclass,
 		       u32 *sid)
 {
@@ -2952,7 +2950,7 @@ int security_genfs_sid(struct selinux_state *state,
 
 int selinux_policy_genfs_sid(struct selinux_policy *policy,
 			const char *fstype,
-			char *path,
+			const char *path,
 			u16 orig_sclass,
 			u32 *sid)
 {

security/selinux/ss/sidtab.c

@@ -27,8 +27,8 @@ struct sidtab_str_cache {
 	char str[];
 };
 
-#define index_to_sid(index) (index + SECINITSID_NUM + 1)
-#define sid_to_index(sid) (sid - (SECINITSID_NUM + 1))
+#define index_to_sid(index) ((index) + SECINITSID_NUM + 1)
+#define sid_to_index(sid) ((sid) - (SECINITSID_NUM + 1))
 
 int sidtab_init(struct sidtab *s)
 {

security/selinux/xfrm.c

@@ -347,7 +347,7 @@ int selinux_xfrm_state_alloc_acquire(struct xfrm_state *x,
 	int rc;
 	struct xfrm_sec_ctx *ctx;
 	char *ctx_str = NULL;
-	int str_len;
+	u32 str_len;
 
 	if (!polsec)
 		return 0;