aboutsummaryrefslogtreecommitdiff
path: root/net/netlabel
diff options
context:
space:
mode:
Diffstat (limited to 'net/netlabel')
-rw-r--r--net/netlabel/netlabel_cipso_v4.c90
-rw-r--r--net/netlabel/netlabel_domainhash.c48
-rw-r--r--net/netlabel/netlabel_kapi.c212
-rw-r--r--net/netlabel/netlabel_mgmt.c42
-rw-r--r--net/netlabel/netlabel_unlabeled.c48
-rw-r--r--net/netlabel/netlabel_user.c7
-rw-r--r--net/netlabel/netlabel_user.h31
7 files changed, 332 insertions, 146 deletions
diff --git a/net/netlabel/netlabel_cipso_v4.c b/net/netlabel/netlabel_cipso_v4.c
index a6ce1d6d5c5..73e0ff469bf 100644
--- a/net/netlabel/netlabel_cipso_v4.c
+++ b/net/netlabel/netlabel_cipso_v4.c
@@ -130,12 +130,12 @@ static int netlbl_cipsov4_add_common(struct genl_info *info,
nla_for_each_nested(nla, info->attrs[NLBL_CIPSOV4_A_TAGLST], nla_rem)
if (nla->nla_type == NLBL_CIPSOV4_A_TAG) {
- if (iter > CIPSO_V4_TAG_MAXCNT)
+ if (iter >= CIPSO_V4_TAG_MAXCNT)
return -EINVAL;
doi_def->tags[iter++] = nla_get_u8(nla);
}
- if (iter < CIPSO_V4_TAG_MAXCNT)
- doi_def->tags[iter] = CIPSO_V4_TAG_INVALID;
+ while (iter < CIPSO_V4_TAG_MAXCNT)
+ doi_def->tags[iter++] = CIPSO_V4_TAG_INVALID;
return 0;
}
@@ -162,6 +162,7 @@ static int netlbl_cipsov4_add_std(struct genl_info *info)
struct nlattr *nla_b;
int nla_a_rem;
int nla_b_rem;
+ u32 iter;
if (!info->attrs[NLBL_CIPSOV4_A_TAGLST] ||
!info->attrs[NLBL_CIPSOV4_A_MLSLVLLST])
@@ -185,20 +186,31 @@ static int netlbl_cipsov4_add_std(struct genl_info *info)
ret_val = netlbl_cipsov4_add_common(info, doi_def);
if (ret_val != 0)
goto add_std_failure;
+ ret_val = -EINVAL;
nla_for_each_nested(nla_a,
info->attrs[NLBL_CIPSOV4_A_MLSLVLLST],
nla_a_rem)
if (nla_a->nla_type == NLBL_CIPSOV4_A_MLSLVL) {
+ if (nla_validate_nested(nla_a,
+ NLBL_CIPSOV4_A_MAX,
+ netlbl_cipsov4_genl_policy) != 0)
+ goto add_std_failure;
nla_for_each_nested(nla_b, nla_a, nla_b_rem)
switch (nla_b->nla_type) {
case NLBL_CIPSOV4_A_MLSLVLLOC:
+ if (nla_get_u32(nla_b) >
+ CIPSO_V4_MAX_LOC_LVLS)
+ goto add_std_failure;
if (nla_get_u32(nla_b) >=
doi_def->map.std->lvl.local_size)
doi_def->map.std->lvl.local_size =
nla_get_u32(nla_b) + 1;
break;
case NLBL_CIPSOV4_A_MLSLVLREM:
+ if (nla_get_u32(nla_b) >
+ CIPSO_V4_MAX_REM_LVLS)
+ goto add_std_failure;
if (nla_get_u32(nla_b) >=
doi_def->map.std->lvl.cipso_size)
doi_def->map.std->lvl.cipso_size =
@@ -206,9 +218,6 @@ static int netlbl_cipsov4_add_std(struct genl_info *info)
break;
}
}
- if (doi_def->map.std->lvl.local_size > CIPSO_V4_MAX_LOC_LVLS ||
- doi_def->map.std->lvl.cipso_size > CIPSO_V4_MAX_REM_LVLS)
- goto add_std_failure;
doi_def->map.std->lvl.local = kcalloc(doi_def->map.std->lvl.local_size,
sizeof(u32),
GFP_KERNEL);
@@ -223,6 +232,10 @@ static int netlbl_cipsov4_add_std(struct genl_info *info)
ret_val = -ENOMEM;
goto add_std_failure;
}
+ for (iter = 0; iter < doi_def->map.std->lvl.local_size; iter++)
+ doi_def->map.std->lvl.local[iter] = CIPSO_V4_INV_LVL;
+ for (iter = 0; iter < doi_def->map.std->lvl.cipso_size; iter++)
+ doi_def->map.std->lvl.cipso[iter] = CIPSO_V4_INV_LVL;
nla_for_each_nested(nla_a,
info->attrs[NLBL_CIPSOV4_A_MLSLVLLST],
nla_a_rem)
@@ -230,11 +243,6 @@ static int netlbl_cipsov4_add_std(struct genl_info *info)
struct nlattr *lvl_loc;
struct nlattr *lvl_rem;
- if (nla_validate_nested(nla_a,
- NLBL_CIPSOV4_A_MAX,
- netlbl_cipsov4_genl_policy) != 0)
- goto add_std_failure;
-
lvl_loc = nla_find_nested(nla_a,
NLBL_CIPSOV4_A_MLSLVLLOC);
lvl_rem = nla_find_nested(nla_a,
@@ -264,12 +272,18 @@ static int netlbl_cipsov4_add_std(struct genl_info *info)
nla_for_each_nested(nla_b, nla_a, nla_b_rem)
switch (nla_b->nla_type) {
case NLBL_CIPSOV4_A_MLSCATLOC:
+ if (nla_get_u32(nla_b) >
+ CIPSO_V4_MAX_LOC_CATS)
+ goto add_std_failure;
if (nla_get_u32(nla_b) >=
doi_def->map.std->cat.local_size)
doi_def->map.std->cat.local_size =
nla_get_u32(nla_b) + 1;
break;
case NLBL_CIPSOV4_A_MLSCATREM:
+ if (nla_get_u32(nla_b) >
+ CIPSO_V4_MAX_REM_CATS)
+ goto add_std_failure;
if (nla_get_u32(nla_b) >=
doi_def->map.std->cat.cipso_size)
doi_def->map.std->cat.cipso_size =
@@ -277,9 +291,6 @@ static int netlbl_cipsov4_add_std(struct genl_info *info)
break;
}
}
- if (doi_def->map.std->cat.local_size > CIPSO_V4_MAX_LOC_CATS ||
- doi_def->map.std->cat.cipso_size > CIPSO_V4_MAX_REM_CATS)
- goto add_std_failure;
doi_def->map.std->cat.local = kcalloc(
doi_def->map.std->cat.local_size,
sizeof(u32),
@@ -296,6 +307,10 @@ static int netlbl_cipsov4_add_std(struct genl_info *info)
ret_val = -ENOMEM;
goto add_std_failure;
}
+ for (iter = 0; iter < doi_def->map.std->cat.local_size; iter++)
+ doi_def->map.std->cat.local[iter] = CIPSO_V4_INV_CAT;
+ for (iter = 0; iter < doi_def->map.std->cat.cipso_size; iter++)
+ doi_def->map.std->cat.cipso[iter] = CIPSO_V4_INV_CAT;
nla_for_each_nested(nla_a,
info->attrs[NLBL_CIPSOV4_A_MLSCATLST],
nla_a_rem)
@@ -407,12 +422,14 @@ static int netlbl_cipsov4_add(struct sk_buff *skb, struct genl_info *info)
audit_buf = netlbl_audit_start_common(AUDIT_MAC_CIPSOV4_ADD,
&audit_info);
- audit_log_format(audit_buf,
- " cipso_doi=%u cipso_type=%s res=%u",
- doi,
- type_str,
- ret_val == 0 ? 1 : 0);
- audit_log_end(audit_buf);
+ if (audit_buf != NULL) {
+ audit_log_format(audit_buf,
+ " cipso_doi=%u cipso_type=%s res=%u",
+ doi,
+ type_str,
+ ret_val == 0 ? 1 : 0);
+ audit_log_end(audit_buf);
+ }
return ret_val;
}
@@ -452,17 +469,13 @@ static int netlbl_cipsov4_list(struct sk_buff *skb, struct genl_info *info)
}
list_start:
- ans_skb = nlmsg_new(NLMSG_GOODSIZE * nlsze_mult, GFP_KERNEL);
+ ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE * nlsze_mult, GFP_KERNEL);
if (ans_skb == NULL) {
ret_val = -ENOMEM;
goto list_failure;
}
- data = netlbl_netlink_hdr_put(ans_skb,
- info->snd_pid,
- info->snd_seq,
- netlbl_cipsov4_gnl_family.id,
- 0,
- NLBL_CIPSOV4_C_LIST);
+ data = genlmsg_put_reply(ans_skb, info, &netlbl_cipsov4_gnl_family,
+ 0, NLBL_CIPSOV4_C_LIST);
if (data == NULL) {
ret_val = -ENOMEM;
goto list_failure;
@@ -568,7 +581,7 @@ list_start:
genlmsg_end(ans_skb, data);
- ret_val = genlmsg_unicast(ans_skb, info->snd_pid);
+ ret_val = genlmsg_reply(ans_skb, info);
if (ret_val != 0)
goto list_failure;
@@ -607,12 +620,9 @@ static int netlbl_cipsov4_listall_cb(struct cipso_v4_doi *doi_def, void *arg)
struct netlbl_cipsov4_doiwalk_arg *cb_arg = arg;
void *data;
- data = netlbl_netlink_hdr_put(cb_arg->skb,
- NETLINK_CB(cb_arg->nl_cb->skb).pid,
- cb_arg->seq,
- netlbl_cipsov4_gnl_family.id,
- NLM_F_MULTI,
- NLBL_CIPSOV4_C_LISTALL);
+ data = genlmsg_put(cb_arg->skb, NETLINK_CB(cb_arg->nl_cb->skb).pid,
+ cb_arg->seq, &netlbl_cipsov4_gnl_family,
+ NLM_F_MULTI, NLBL_CIPSOV4_C_LISTALL);
if (data == NULL)
goto listall_cb_failure;
@@ -687,11 +697,13 @@ static int netlbl_cipsov4_remove(struct sk_buff *skb, struct genl_info *info)
audit_buf = netlbl_audit_start_common(AUDIT_MAC_CIPSOV4_DEL,
&audit_info);
- audit_log_format(audit_buf,
- " cipso_doi=%u res=%u",
- doi,
- ret_val == 0 ? 1 : 0);
- audit_log_end(audit_buf);
+ if (audit_buf != NULL) {
+ audit_log_format(audit_buf,
+ " cipso_doi=%u res=%u",
+ doi,
+ ret_val == 0 ? 1 : 0);
+ audit_log_end(audit_buf);
+ }
return ret_val;
}
diff --git a/net/netlabel/netlabel_domainhash.c b/net/netlabel/netlabel_domainhash.c
index af4371d3b45..f46a0aeec44 100644
--- a/net/netlabel/netlabel_domainhash.c
+++ b/net/netlabel/netlabel_domainhash.c
@@ -202,7 +202,6 @@ int netlbl_domhsh_add(struct netlbl_dom_map *entry,
int ret_val;
u32 bkt;
struct audit_buffer *audit_buf;
- char *audit_domain;
switch (entry->type) {
case NETLBL_NLTYPE_UNLABELED:
@@ -243,24 +242,24 @@ int netlbl_domhsh_add(struct netlbl_dom_map *entry,
} else
ret_val = -EINVAL;
- if (entry->domain != NULL)
- audit_domain = entry->domain;
- else
- audit_domain = "(default)";
audit_buf = netlbl_audit_start_common(AUDIT_MAC_MAP_ADD, audit_info);
- audit_log_format(audit_buf, " nlbl_domain=%s", audit_domain);
- switch (entry->type) {
- case NETLBL_NLTYPE_UNLABELED:
- audit_log_format(audit_buf, " nlbl_protocol=unlbl");
- break;
- case NETLBL_NLTYPE_CIPSOV4:
+ if (audit_buf != NULL) {
audit_log_format(audit_buf,
- " nlbl_protocol=cipsov4 cipso_doi=%u",
- entry->type_def.cipsov4->doi);
- break;
+ " nlbl_domain=%s",
+ entry->domain ? entry->domain : "(default)");
+ switch (entry->type) {
+ case NETLBL_NLTYPE_UNLABELED:
+ audit_log_format(audit_buf, " nlbl_protocol=unlbl");
+ break;
+ case NETLBL_NLTYPE_CIPSOV4:
+ audit_log_format(audit_buf,
+ " nlbl_protocol=cipsov4 cipso_doi=%u",
+ entry->type_def.cipsov4->doi);
+ break;
+ }
+ audit_log_format(audit_buf, " res=%u", ret_val == 0 ? 1 : 0);
+ audit_log_end(audit_buf);
}
- audit_log_format(audit_buf, " res=%u", ret_val == 0 ? 1 : 0);
- audit_log_end(audit_buf);
rcu_read_unlock();
@@ -310,7 +309,6 @@ int netlbl_domhsh_remove(const char *domain, struct netlbl_audit *audit_info)
int ret_val = -ENOENT;
struct netlbl_dom_map *entry;
struct audit_buffer *audit_buf;
- char *audit_domain;
rcu_read_lock();
if (domain != NULL)
@@ -348,16 +346,14 @@ int netlbl_domhsh_remove(const char *domain, struct netlbl_audit *audit_info)
spin_unlock(&netlbl_domhsh_def_lock);
}
- if (entry->domain != NULL)
- audit_domain = entry->domain;
- else
- audit_domain = "(default)";
audit_buf = netlbl_audit_start_common(AUDIT_MAC_MAP_DEL, audit_info);
- audit_log_format(audit_buf,
- " nlbl_domain=%s res=%u",
- audit_domain,
- ret_val == 0 ? 1 : 0);
- audit_log_end(audit_buf);
+ if (audit_buf != NULL) {
+ audit_log_format(audit_buf,
+ " nlbl_domain=%s res=%u",
+ entry->domain ? entry->domain : "(default)",
+ ret_val == 0 ? 1 : 0);
+ audit_log_end(audit_buf);
+ }
if (ret_val == 0)
call_rcu(&entry->rcu, netlbl_domhsh_free_entry);
diff --git a/net/netlabel/netlabel_kapi.c b/net/netlabel/netlabel_kapi.c
index ff971103fd0..e03a3282c55 100644
--- a/net/netlabel/netlabel_kapi.c
+++ b/net/netlabel/netlabel_kapi.c
@@ -40,6 +40,207 @@
#include "netlabel_user.h"
/*
+ * Security Attribute Functions
+ */
+
+/**
+ * netlbl_secattr_catmap_walk - Walk a LSM secattr catmap looking for a bit
+ * @catmap: the category bitmap
+ * @offset: the offset to start searching at, in bits
+ *
+ * Description:
+ * This function walks a LSM secattr category bitmap starting at @offset and
+ * returns the spot of the first set bit or -ENOENT if no bits are set.
+ *
+ */
+int netlbl_secattr_catmap_walk(struct netlbl_lsm_secattr_catmap *catmap,
+ u32 offset)
+{
+ struct netlbl_lsm_secattr_catmap *iter = catmap;
+ u32 node_idx;
+ u32 node_bit;
+ NETLBL_CATMAP_MAPTYPE bitmap;
+
+ if (offset > iter->startbit) {
+ while (offset >= (iter->startbit + NETLBL_CATMAP_SIZE)) {
+ iter = iter->next;
+ if (iter == NULL)
+ return -ENOENT;
+ }
+ node_idx = (offset - iter->startbit) / NETLBL_CATMAP_MAPSIZE;
+ node_bit = offset - iter->startbit -
+ (NETLBL_CATMAP_MAPSIZE * node_idx);
+ } else {
+ node_idx = 0;
+ node_bit = 0;
+ }
+ bitmap = iter->bitmap[node_idx] >> node_bit;
+
+ for (;;) {
+ if (bitmap != 0) {
+ while ((bitmap & NETLBL_CATMAP_BIT) == 0) {
+ bitmap >>= 1;
+ node_bit++;
+ }
+ return iter->startbit +
+ (NETLBL_CATMAP_MAPSIZE * node_idx) + node_bit;
+ }
+ if (++node_idx >= NETLBL_CATMAP_MAPCNT) {
+ if (iter->next != NULL) {
+ iter = iter->next;
+ node_idx = 0;
+ } else
+ return -ENOENT;
+ }
+ bitmap = iter->bitmap[node_idx];
+ node_bit = 0;
+ }
+
+ return -ENOENT;
+}
+
+/**
+ * netlbl_secattr_catmap_walk_rng - Find the end of a string of set bits
+ * @catmap: the category bitmap
+ * @offset: the offset to start searching at, in bits
+ *
+ * Description:
+ * This function walks a LSM secattr category bitmap starting at @offset and
+ * returns the spot of the first cleared bit or -ENOENT if the offset is past
+ * the end of the bitmap.
+ *
+ */
+int netlbl_secattr_catmap_walk_rng(struct netlbl_lsm_secattr_catmap *catmap,
+ u32 offset)
+{
+ struct netlbl_lsm_secattr_catmap *iter = catmap;
+ u32 node_idx;
+ u32 node_bit;
+ NETLBL_CATMAP_MAPTYPE bitmask;
+ NETLBL_CATMAP_MAPTYPE bitmap;
+
+ if (offset > iter->startbit) {
+ while (offset >= (iter->startbit + NETLBL_CATMAP_SIZE)) {
+ iter = iter->next;
+ if (iter == NULL)
+ return -ENOENT;
+ }
+ node_idx = (offset - iter->startbit) / NETLBL_CATMAP_MAPSIZE;
+ node_bit = offset - iter->startbit -
+ (NETLBL_CATMAP_MAPSIZE * node_idx);
+ } else {
+ node_idx = 0;
+ node_bit = 0;
+ }
+ bitmask = NETLBL_CATMAP_BIT << node_bit;
+
+ for (;;) {
+ bitmap = iter->bitmap[node_idx];
+ while (bitmask != 0 && (bitmap & bitmask) != 0) {
+ bitmask <<= 1;
+ node_bit++;
+ }
+
+ if (bitmask != 0)
+ return iter->startbit +
+ (NETLBL_CATMAP_MAPSIZE * node_idx) +
+ node_bit - 1;
+ else if (++node_idx >= NETLBL_CATMAP_MAPCNT) {
+ if (iter->next == NULL)
+ return iter->startbit + NETLBL_CATMAP_SIZE - 1;
+ iter = iter->next;
+ node_idx = 0;
+ }
+ bitmask = NETLBL_CATMAP_BIT;
+ node_bit = 0;
+ }
+
+ return -ENOENT;
+}
+
+/**
+ * netlbl_secattr_catmap_setbit - Set a bit in a LSM secattr catmap
+ * @catmap: the category bitmap
+ * @bit: the bit to set
+ * @flags: memory allocation flags
+ *
+ * Description:
+ * Set the bit specified by @bit in @catmap. Returns zero on success,
+ * negative values on failure.
+ *
+ */
+int netlbl_secattr_catmap_setbit(struct netlbl_lsm_secattr_catmap *catmap,
+ u32 bit,
+ gfp_t flags)
+{
+ struct netlbl_lsm_secattr_catmap *iter = catmap;
+ u32 node_bit;
+ u32 node_idx;
+
+ while (iter->next != NULL &&
+ bit >= (iter->startbit + NETLBL_CATMAP_SIZE))
+ iter = iter->next;
+ if (bit >= (iter->startbit + NETLBL_CATMAP_SIZE)) {
+ iter->next = netlbl_secattr_catmap_alloc(flags);
+ if (iter->next == NULL)
+ return -ENOMEM;
+ iter = iter->next;
+ iter->startbit = bit & ~(NETLBL_CATMAP_SIZE - 1);
+ }
+
+ /* gcc always rounds to zero when doing integer division */
+ node_idx = (bit - iter->startbit) / NETLBL_CATMAP_MAPSIZE;
+ node_bit = bit - iter->startbit - (NETLBL_CATMAP_MAPSIZE * node_idx);
+ iter->bitmap[node_idx] |= NETLBL_CATMAP_BIT << node_bit;
+
+ return 0;
+}
+
+/**
+ * netlbl_secattr_catmap_setrng - Set a range of bits in a LSM secattr catmap
+ * @catmap: the category bitmap
+ * @start: the starting bit
+ * @end: the last bit in the string
+ * @flags: memory allocation flags
+ *
+ * Description:
+ * Set a range of bits, starting at @start and ending with @end. Returns zero
+ * on success, negative values on failure.
+ *
+ */
+int netlbl_secattr_catmap_setrng(struct netlbl_lsm_secattr_catmap *catmap,
+ u32 start,
+ u32 end,
+ gfp_t flags)
+{
+ int ret_val = 0;
+ struct netlbl_lsm_secattr_catmap *iter = catmap;
+ u32 iter_max_spot;
+ u32 spot;
+
+ /* XXX - This could probably be made a bit faster by combining writes
+ * to the catmap instead of setting a single bit each time, but for
+ * right now skipping to the start of the range in the catmap should
+ * be a nice improvement over calling the individual setbit function
+ * repeatedly from a loop. */
+
+ while (iter->next != NULL &&
+ start >= (iter->startbit + NETLBL_CATMAP_SIZE))
+ iter = iter->next;
+ iter_max_spot = iter->startbit + NETLBL_CATMAP_SIZE;
+
+ for (spot = start; spot <= end && ret_val == 0; spot++) {
+ if (spot >= iter_max_spot && iter->next != NULL) {
+ iter = iter->next;
+ iter_max_spot = iter->startbit + NETLBL_CATMAP_SIZE;
+ }
+ ret_val = netlbl_secattr_catmap_setbit(iter, spot, GFP_ATOMIC);
+ }
+
+ return ret_val;
+}
+
+/*
* LSM Functions
*/
@@ -62,6 +263,9 @@ int netlbl_socket_setattr(const struct socket *sock,
int ret_val = -ENOENT;
struct netlbl_dom_map *dom_entry;
+ if ((secattr->flags & NETLBL_SECATTR_DOMAIN) == 0)
+ return -ENOENT;
+
rcu_read_lock();
dom_entry = netlbl_domhsh_getentry(secattr->domain);
if (dom_entry == NULL)
@@ -146,10 +350,8 @@ int netlbl_socket_getattr(const struct socket *sock,
int netlbl_skbuff_getattr(const struct sk_buff *skb,
struct netlbl_lsm_secattr *secattr)
{
- int ret_val;
-
- ret_val = cipso_v4_skbuff_getattr(skb, secattr);
- if (ret_val == 0)
+ if (CIPSO_V4_OPTEXIST(skb) &&
+ cipso_v4_skbuff_getattr(skb, secattr) == 0)
return 0;
return netlbl_unlabel_getattr(secattr);
@@ -200,7 +402,7 @@ void netlbl_cache_invalidate(void)
int netlbl_cache_add(const struct sk_buff *skb,
const struct netlbl_lsm_secattr *secattr)
{
- if (secattr->cache == NULL)
+ if ((secattr->flags & NETLBL_SECATTR_CACHE) == 0)
return -ENOMSG;
if (CIPSO_V4_OPTEXIST(skb))
diff --git a/net/netlabel/netlabel_mgmt.c b/net/netlabel/netlabel_mgmt.c
index 53c9079ad2c..e8c80f33f3d 100644
--- a/net/netlabel/netlabel_mgmt.c
+++ b/net/netlabel/netlabel_mgmt.c
@@ -188,12 +188,9 @@ static int netlbl_mgmt_listall_cb(struct netlbl_dom_map *entry, void *arg)
struct netlbl_domhsh_walk_arg *cb_arg = arg;
void *data;
- data = netlbl_netlink_hdr_put(cb_arg->skb,
- NETLINK_CB(cb_arg->nl_cb->skb).pid,
- cb_arg->seq,
- netlbl_mgmt_gnl_family.id,
- NLM_F_MULTI,
- NLBL_MGMT_C_LISTALL);
+ data = genlmsg_put(cb_arg->skb, NETLINK_CB(cb_arg->nl_cb->skb).pid,
+ cb_arg->seq, &netlbl_mgmt_gnl_family,
+ NLM_F_MULTI, NLBL_MGMT_C_LISTALL);
if (data == NULL)
goto listall_cb_failure;
@@ -356,15 +353,11 @@ static int netlbl_mgmt_listdef(struct sk_buff *skb, struct genl_info *info)
void *data;
struct netlbl_dom_map *entry;
- ans_skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (ans_skb == NULL)
return -ENOMEM;
- data = netlbl_netlink_hdr_put(ans_skb,
- info->snd_pid,
- info->snd_seq,
- netlbl_mgmt_gnl_family.id,
- 0,
- NLBL_MGMT_C_LISTDEF);
+ data = genlmsg_put_reply(ans_skb, info, &netlbl_mgmt_gnl_family,
+ 0, NLBL_MGMT_C_LISTDEF);
if (data == NULL)
goto listdef_failure;
@@ -390,7 +383,7 @@ static int netlbl_mgmt_listdef(struct sk_buff *skb, struct genl_info *info)
genlmsg_end(ans_skb, data);
- ret_val = genlmsg_unicast(ans_skb, info->snd_pid);
+ ret_val = genlmsg_reply(ans_skb, info);
if (ret_val != 0)
goto listdef_failure;
return 0;
@@ -422,12 +415,9 @@ static int netlbl_mgmt_protocols_cb(struct sk_buff *skb,
int ret_val = -ENOMEM;
void *data;
- data = netlbl_netlink_hdr_put(skb,
- NETLINK_CB(cb->skb).pid,
- cb->nlh->nlmsg_seq,
- netlbl_mgmt_gnl_family.id,
- NLM_F_MULTI,
- NLBL_MGMT_C_PROTOCOLS);
+ data = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq,
+ &netlbl_mgmt_gnl_family, NLM_F_MULTI,
+ NLBL_MGMT_C_PROTOCOLS);
if (data == NULL)
goto protocols_cb_failure;
@@ -492,15 +482,11 @@ static int netlbl_mgmt_version(struct sk_buff *skb, struct genl_info *info)
struct sk_buff *ans_skb = NULL;
void *data;
- ans_skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (ans_skb == NULL)
return -ENOMEM;
- data = netlbl_netlink_hdr_put(ans_skb,
- info->snd_pid,
- info->snd_seq,
- netlbl_mgmt_gnl_family.id,
- 0,
- NLBL_MGMT_C_VERSION);
+ data = genlmsg_put_reply(ans_skb, info, &netlbl_mgmt_gnl_family,
+ 0, NLBL_MGMT_C_VERSION);
if (data == NULL)
goto version_failure;
@@ -512,7 +498,7 @@ static int netlbl_mgmt_version(struct sk_buff *skb, struct genl_info *info)
genlmsg_end(ans_skb, data);
- ret_val = genlmsg_unicast(ans_skb, info->snd_pid);
+ ret_val = genlmsg_reply(ans_skb, info);
if (ret_val != 0)
goto version_failure;
return 0;
diff --git a/net/netlabel/netlabel_unlabeled.c b/net/netlabel/netlabel_unlabeled.c
index 1833ad233b3..5bc37181662 100644
--- a/net/netlabel/netlabel_unlabeled.c
+++ b/net/netlabel/netlabel_unlabeled.c
@@ -35,6 +35,7 @@
#include <linux/socket.h>
#include <linux/string.h>
#include <linux/skbuff.h>
+#include <linux/audit.h>
#include <net/sock.h>
#include <net/netlink.h>
#include <net/genetlink.h>
@@ -47,7 +48,8 @@
#include "netlabel_unlabeled.h"
/* Accept unlabeled packets flag */
-static atomic_t netlabel_unlabel_accept_flg = ATOMIC_INIT(0);
+static DEFINE_SPINLOCK(netlabel_unlabel_acceptflg_lock);
+static u8 netlabel_unlabel_acceptflg = 0;
/* NetLabel Generic NETLINK CIPSOv4 family */
static struct genl_family netlbl_unlabel_gnl_family = {
@@ -82,13 +84,20 @@ static void netlbl_unlabel_acceptflg_set(u8 value,
struct audit_buffer *audit_buf;
u8 old_val;
- old_val = atomic_read(&netlabel_unlabel_accept_flg);
- atomic_set(&netlabel_unlabel_accept_flg, value);
+ rcu_read_lock();
+ old_val = netlabel_unlabel_acceptflg;
+ spin_lock(&netlabel_unlabel_acceptflg_lock);
+ netlabel_unlabel_acceptflg = value;
+ spin_unlock(&netlabel_unlabel_acceptflg_lock);
+ rcu_read_unlock();
audit_buf = netlbl_audit_start_common(AUDIT_MAC_UNLBL_ALLOW,
audit_info);
- audit_log_format(audit_buf, " unlbl_accept=%u old=%u", value, old_val);
- audit_log_end(audit_buf);
+ if (audit_buf != NULL) {
+ audit_log_format(audit_buf,
+ " unlbl_accept=%u old=%u", value, old_val);
+ audit_log_end(audit_buf);
+ }
}
/*
@@ -138,29 +147,27 @@ static int netlbl_unlabel_list(struct sk_buff *skb, struct genl_info *info)
struct sk_buff *ans_skb;
void *data;
- ans_skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (ans_skb == NULL)
goto list_failure;
- data = netlbl_netlink_hdr_put(ans_skb,
- info->snd_pid,
- info->snd_seq,
- netlbl_unlabel_gnl_family.id,
- 0,
- NLBL_UNLABEL_C_LIST);
+ data = genlmsg_put_reply(ans_skb, info, &netlbl_unlabel_gnl_family,
+ 0, NLBL_UNLABEL_C_LIST);
if (data == NULL) {
ret_val = -ENOMEM;
goto list_failure;
}
+ rcu_read_lock();
ret_val = nla_put_u8(ans_skb,
NLBL_UNLABEL_A_ACPTFLG,
- atomic_read(&netlabel_unlabel_accept_flg));
+ netlabel_unlabel_acceptflg);
+ rcu_read_unlock();
if (ret_val != 0)
goto list_failure;
genlmsg_end(ans_skb, data);
- ret_val = genlmsg_unicast(ans_skb, info->snd_pid);
+ ret_val = genlmsg_reply(ans_skb, info);
if (ret_val != 0)
goto list_failure;
return 0;
@@ -240,10 +247,17 @@ int netlbl_unlabel_genl_init(void)
*/
int netlbl_unlabel_getattr(struct netlbl_lsm_secattr *secattr)
{
- if (atomic_read(&netlabel_unlabel_accept_flg) == 1)
- return netlbl_secattr_init(secattr);
+ int ret_val;
- return -ENOMSG;
+ rcu_read_lock();
+ if (netlabel_unlabel_acceptflg == 1) {
+ netlbl_secattr_init(secattr);
+ ret_val = 0;
+ } else
+ ret_val = -ENOMSG;
+ rcu_read_unlock();
+
+ return ret_val;
}
/**
diff --git a/net/netlabel/netlabel_user.c b/net/netlabel/netlabel_user.c
index 98a416381e6..42f12bd6596 100644
--- a/net/netlabel/netlabel_user.c
+++ b/net/netlabel/netlabel_user.c
@@ -46,6 +46,10 @@
#include "netlabel_cipso_v4.h"
#include "netlabel_user.h"
+/* do not do any auditing if audit_enabled == 0, see kernel/audit.c for
+ * details */
+extern int audit_enabled;
+
/*
* NetLabel NETLINK Setup Functions
*/
@@ -101,6 +105,9 @@ struct audit_buffer *netlbl_audit_start_common(int type,
char *secctx;
u32 secctx_len;
+ if (audit_enabled == 0)
+ return NULL;
+
audit_buf = audit_log_start(audit_ctx, GFP_ATOMIC, type);
if (audit_buf == NULL)
return NULL;
diff --git a/net/netlabel/netlabel_user.h b/net/netlabel/netlabel_user.h
index 47967ef3296..6d7f4ab46c2 100644
--- a/net/netlabel/netlabel_user.h
+++ b/net/netlabel/netlabel_user.h
@@ -42,37 +42,6 @@
/* NetLabel NETLINK helper functions */
/**
- * netlbl_netlink_hdr_put - Write the NETLINK buffers into a sk_buff
- * @skb: the packet
- * @pid: the PID of the receipient
- * @seq: the sequence number
- * @type: the generic NETLINK message family type
- * @cmd: command
- *
- * Description:
- * Write both a NETLINK nlmsghdr structure and a Generic NETLINK genlmsghdr
- * struct to the packet. Returns a pointer to the start of the payload buffer
- * on success or NULL on failure.
- *
- */
-static inline void *netlbl_netlink_hdr_put(struct sk_buff *skb,
- u32 pid,
- u32 seq,
- int type,
- int flags,
- u8 cmd)
-{
- return genlmsg_put(skb,
- pid,
- seq,
- type,
- 0,
- flags,
- cmd,
- NETLBL_PROTO_VERSION);
-}
-
-/**
* netlbl_netlink_auditinfo - Fetch the audit information from a NETLINK msg
* @skb: the packet
* @audit_info: NetLabel audit information
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-31 08:06:04 +0000