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authorPaul Moore <paul.moore@hp.com>2006-11-17 17:38:46 -0500
committerDavid S. Miller <davem@sunset.davemloft.net>2006-12-02 21:24:07 -0800
commit701a90bad99b8081a824cca52c178c8fc8f46bb2 (patch)
tree5fed88e6707e9122d7f16e4c5d8fea7c69e090ac /security
parentc6fa82a9dd6160e0bc980cb0401c16bf62f2fe66 (diff)
downloadleg-kernel-701a90bad99b8081a824cca52c178c8fc8f46bb2.tar.gz
NetLabel: make netlbl_lsm_secattr struct easier/quicker to understand
The existing netlbl_lsm_secattr struct required the LSM to check all of the fields to determine if any security attributes were present resulting in a lot of work in the common case of no attributes. This patch adds a 'flags' field which is used to indicate which attributes are present in the structure; this should allow the LSM to do a quick comparison to determine if the structure holds any security attributes. Example: if (netlbl_lsm_secattr->flags) /* security attributes present */ else /* NO security attributes present */ Signed-off-by: Paul Moore <paul.moore@hp.com> Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'security')
-rw-r--r--security/selinux/ss/services.c24
1 files changed, 16 insertions, 8 deletions
diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c
index 408820486af0..1f5bbb246d28 100644
--- a/security/selinux/ss/services.c
+++ b/security/selinux/ss/services.c
@@ -2254,8 +2254,6 @@ static void selinux_netlbl_cache_add(struct sk_buff *skb, struct context *ctx)
cache = kzalloc(sizeof(*cache), GFP_ATOMIC);
if (cache == NULL)
goto netlbl_cache_add_return;
- secattr.cache->free = selinux_netlbl_cache_free;
- secattr.cache->data = (void *)cache;
cache->type = NETLBL_CACHE_T_MLS;
if (ebitmap_cpy(&cache->data.mls_label.level[0].cat,
@@ -2268,6 +2266,10 @@ static void selinux_netlbl_cache_add(struct sk_buff *skb, struct context *ctx)
cache->data.mls_label.level[0].sens = ctx->range.level[0].sens;
cache->data.mls_label.level[1].sens = ctx->range.level[0].sens;
+ secattr.cache->free = selinux_netlbl_cache_free;
+ secattr.cache->data = (void *)cache;
+ secattr.flags = NETLBL_SECATTR_CACHE;
+
netlbl_cache_add(skb, &secattr);
netlbl_cache_add_return:
@@ -2313,7 +2315,7 @@ static int selinux_netlbl_secattr_to_sid(struct sk_buff *skb,
POLICY_RDLOCK;
- if (secattr->cache) {
+ if (secattr->flags & NETLBL_SECATTR_CACHE) {
cache = NETLBL_CACHE(secattr->cache->data);
switch (cache->type) {
case NETLBL_CACHE_T_SID:
@@ -2346,7 +2348,7 @@ static int selinux_netlbl_secattr_to_sid(struct sk_buff *skb,
default:
goto netlbl_secattr_to_sid_return;
}
- } else if (secattr->mls_lvl_vld) {
+ } else if (secattr->flags & NETLBL_SECATTR_MLS_LVL) {
ctx = sidtab_search(&sidtab, base_sid);
if (ctx == NULL)
goto netlbl_secattr_to_sid_return;
@@ -2355,7 +2357,7 @@ static int selinux_netlbl_secattr_to_sid(struct sk_buff *skb,
ctx_new.role = ctx->role;
ctx_new.type = ctx->type;
mls_import_lvl(&ctx_new, secattr->mls_lvl, secattr->mls_lvl);
- if (secattr->mls_cat) {
+ if (secattr->flags & NETLBL_SECATTR_MLS_CAT) {
if (mls_import_cat(&ctx_new,
secattr->mls_cat,
secattr->mls_cat_len,
@@ -2414,11 +2416,13 @@ static int selinux_netlbl_skbuff_getsid(struct sk_buff *skb,
netlbl_secattr_init(&secattr);
rc = netlbl_skbuff_getattr(skb, &secattr);
- if (rc == 0)
+ if (rc == 0 && secattr.flags != NETLBL_SECATTR_NONE)
rc = selinux_netlbl_secattr_to_sid(skb,
&secattr,
base_sid,
sid);
+ else
+ *sid = SECSID_NULL;
netlbl_secattr_destroy(&secattr);
return rc;
@@ -2455,7 +2459,6 @@ static int selinux_netlbl_socket_setsid(struct socket *sock, u32 sid)
secattr.domain = kstrdup(policydb.p_type_val_to_name[ctx->type - 1],
GFP_ATOMIC);
mls_export_lvl(ctx, &secattr.mls_lvl, NULL);
- secattr.mls_lvl_vld = 1;
rc = mls_export_cat(ctx,
&secattr.mls_cat,
&secattr.mls_cat_len,
@@ -2464,6 +2467,10 @@ static int selinux_netlbl_socket_setsid(struct socket *sock, u32 sid)
if (rc != 0)
goto netlbl_socket_setsid_return;
+ secattr.flags |= NETLBL_SECATTR_DOMAIN | NETLBL_SECATTR_MLS_LVL;
+ if (secattr.mls_cat)
+ secattr.flags |= NETLBL_SECATTR_MLS_CAT;
+
rc = netlbl_socket_setattr(sock, &secattr);
if (rc == 0)
sksec->nlbl_state = NLBL_LABELED;
@@ -2564,6 +2571,7 @@ void selinux_netlbl_sock_graft(struct sock *sk, struct socket *sock)
netlbl_secattr_init(&secattr);
if (netlbl_sock_getattr(sk, &secattr) == 0 &&
+ secattr.flags != NETLBL_SECATTR_NONE &&
selinux_netlbl_secattr_to_sid(NULL,
&secattr,
SECINITSID_UNLABELED,
@@ -2756,7 +2764,7 @@ int selinux_netlbl_socket_setsockopt(struct socket *sock,
sksec->nlbl_state == NLBL_LABELED) {
netlbl_secattr_init(&secattr);
rc = netlbl_socket_getattr(sock, &secattr);
- if (rc == 0 && (secattr.cache || secattr.mls_lvl_vld))
+ if (rc == 0 && secattr.flags != NETLBL_SECATTR_NONE)
rc = -EACCES;
netlbl_secattr_destroy(&secattr);
}