@@ -2047,6 +2047,7 @@ struct lsm_blob_sizes {
int lbs_cred;
int lbs_file;
int lbs_inode;
+ int lbs_sock;
int lbs_superblock;
int lbs_ipc;
int lbs_msg_msg;
@@ -55,7 +55,11 @@ struct aa_sk_ctx {
struct aa_label *peer;
};
-#define SK_CTX(X) ((X)->sk_security)
+static inline struct aa_sk_ctx *aa_sock(const struct sock *sk)
+{
+ return sk->sk_security + apparmor_blob_sizes.lbs_sock;
+}
+
#define SOCK_ctx(X) SOCK_INODE(X)->i_security
#define DEFINE_AUDIT_NET(NAME, OP, SK, F, T, P) \
struct lsm_network_audit NAME ## _net = { .sk = (SK), \
@@ -757,33 +757,15 @@ static int apparmor_task_kill(struct task_struct *target, struct kernel_siginfo
return error;
}
-/**
- * apparmor_sk_alloc_security - allocate and attach the sk_security field
- */
-static int apparmor_sk_alloc_security(struct sock *sk, int family, gfp_t flags)
-{
- struct aa_sk_ctx *ctx;
-
- ctx = kzalloc(sizeof(*ctx), flags);
- if (!ctx)
- return -ENOMEM;
-
- SK_CTX(sk) = ctx;
-
- return 0;
-}
-
/**
* apparmor_sk_free_security - free the sk_security field
*/
static void apparmor_sk_free_security(struct sock *sk)
{
- struct aa_sk_ctx *ctx = SK_CTX(sk);
+ struct aa_sk_ctx *ctx = aa_sock(sk);
- SK_CTX(sk) = NULL;
aa_put_label(ctx->label);
aa_put_label(ctx->peer);
- kfree(ctx);
}
/**
@@ -792,8 +774,8 @@ static void apparmor_sk_free_security(struct sock *sk)
static void apparmor_sk_clone_security(const struct sock *sk,
struct sock *newsk)
{
- struct aa_sk_ctx *ctx = SK_CTX(sk);
- struct aa_sk_ctx *new = SK_CTX(newsk);
+ struct aa_sk_ctx *ctx = aa_sock(sk);
+ struct aa_sk_ctx *new = aa_sock(newsk);
new->label = aa_get_label(ctx->label);
new->peer = aa_get_label(ctx->peer);
@@ -844,7 +826,7 @@ static int apparmor_socket_post_create(struct socket *sock, int family,
label = aa_get_current_label();
if (sock->sk) {
- struct aa_sk_ctx *ctx = SK_CTX(sock->sk);
+ struct aa_sk_ctx *ctx = aa_sock(sock->sk);
aa_put_label(ctx->label);
ctx->label = aa_get_label(label);
@@ -1029,7 +1011,7 @@ static int apparmor_socket_shutdown(struct socket *sock, int how)
*/
static int apparmor_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
{
- struct aa_sk_ctx *ctx = SK_CTX(sk);
+ struct aa_sk_ctx *ctx = aa_sock(sk);
if (!skb->secmark)
return 0;
@@ -1042,7 +1024,7 @@ static int apparmor_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
static struct aa_label *sk_peer_label(struct sock *sk)
{
- struct aa_sk_ctx *ctx = SK_CTX(sk);
+ struct aa_sk_ctx *ctx = aa_sock(sk);
if (ctx->peer)
return ctx->peer;
@@ -1126,7 +1108,7 @@ static int apparmor_socket_getpeersec_dgram(struct socket *sock,
*/
static void apparmor_sock_graft(struct sock *sk, struct socket *parent)
{
- struct aa_sk_ctx *ctx = SK_CTX(sk);
+ struct aa_sk_ctx *ctx = aa_sock(sk);
if (!ctx->label)
ctx->label = aa_get_current_label();
@@ -1136,7 +1118,7 @@ static void apparmor_sock_graft(struct sock *sk, struct socket *parent)
static int apparmor_inet_conn_request(struct sock *sk, struct sk_buff *skb,
struct request_sock *req)
{
- struct aa_sk_ctx *ctx = SK_CTX(sk);
+ struct aa_sk_ctx *ctx = aa_sock(sk);
if (!skb->secmark)
return 0;
@@ -1153,6 +1135,7 @@ struct lsm_blob_sizes apparmor_blob_sizes __lsm_ro_after_init = {
.lbs_cred = sizeof(struct aa_task_ctx *),
.lbs_file = sizeof(struct aa_file_ctx),
.lbs_task = sizeof(struct aa_task_ctx),
+ .lbs_sock = sizeof(struct aa_sk_ctx),
};
static struct security_hook_list apparmor_hooks[] __lsm_ro_after_init = {
@@ -1189,7 +1172,6 @@ static struct security_hook_list apparmor_hooks[] __lsm_ro_after_init = {
LSM_HOOK_INIT(getprocattr, apparmor_getprocattr),
LSM_HOOK_INIT(setprocattr, apparmor_setprocattr),
- LSM_HOOK_INIT(sk_alloc_security, apparmor_sk_alloc_security),
LSM_HOOK_INIT(sk_free_security, apparmor_sk_free_security),
LSM_HOOK_INIT(sk_clone_security, apparmor_sk_clone_security),
@@ -1581,7 +1563,7 @@ static unsigned int apparmor_ip_postroute(void *priv,
if (sk == NULL)
return NF_ACCEPT;
- ctx = SK_CTX(sk);
+ ctx = aa_sock(sk);
if (!apparmor_secmark_check(ctx->label, OP_SENDMSG, AA_MAY_SEND,
skb->secmark, sk))
return NF_ACCEPT;
@@ -32,6 +32,7 @@
#include <linux/string.h>
#include <linux/msg.h>
#include <net/flow.h>
+#include <net/sock.h>
#define MAX_LSM_EVM_XATTR 2
@@ -172,6 +173,7 @@ static void __init lsm_set_blob_sizes(struct lsm_blob_sizes *needed)
lsm_set_blob_size(&needed->lbs_inode, &blob_sizes.lbs_inode);
lsm_set_blob_size(&needed->lbs_ipc, &blob_sizes.lbs_ipc);
lsm_set_blob_size(&needed->lbs_msg_msg, &blob_sizes.lbs_msg_msg);
+ lsm_set_blob_size(&needed->lbs_sock, &blob_sizes.lbs_sock);
lsm_set_blob_size(&needed->lbs_superblock, &blob_sizes.lbs_superblock);
lsm_set_blob_size(&needed->lbs_task, &blob_sizes.lbs_task);
}
@@ -306,6 +308,7 @@ static void __init ordered_lsm_init(void)
init_debug("inode blob size = %d\n", blob_sizes.lbs_inode);
init_debug("ipc blob size = %d\n", blob_sizes.lbs_ipc);
init_debug("msg_msg blob size = %d\n", blob_sizes.lbs_msg_msg);
+ init_debug("sock blob size = %d\n", blob_sizes.lbs_sock);
init_debug("superblock blob size = %d\n", blob_sizes.lbs_superblock);
init_debug("task blob size = %d\n", blob_sizes.lbs_task);
@@ -605,6 +608,28 @@ static void __init lsm_early_task(struct task_struct *task)
panic("%s: Early task alloc failed.\n", __func__);
}
+/**
+ * lsm_sock_alloc - allocate a composite sock blob
+ * @sock: the sock that needs a blob
+ * @priority: allocation mode
+ *
+ * Allocate the sock blob for all the modules
+ *
+ * Returns 0, or -ENOMEM if memory can't be allocated.
+ */
+int lsm_sock_alloc(struct sock *sock, gfp_t priority)
+{
+ if (blob_sizes.lbs_sock == 0) {
+ sock->sk_security = NULL;
+ return 0;
+ }
+
+ sock->sk_security = kzalloc(blob_sizes.lbs_sock, priority);
+ if (sock->sk_security == NULL)
+ return -ENOMEM;
+ return 0;
+}
+
/**
* lsm_superblock_alloc - allocate a composite superblock blob
* @sb: the superblock that needs a blob
@@ -2048,12 +2073,21 @@ EXPORT_SYMBOL(security_socket_getpeersec_dgram);
int security_sk_alloc(struct sock *sk, int family, gfp_t priority)
{
- return call_int_hook(sk_alloc_security, 0, sk, family, priority);
+ int rc = lsm_sock_alloc(sk, priority);
+
+ if (unlikely(rc))
+ return rc;
+ rc = call_int_hook(sk_alloc_security, 0, sk, family, priority);
+ if (unlikely(rc))
+ security_sk_free(sk);
+ return rc;
}
void security_sk_free(struct sock *sk)
{
call_void_hook(sk_free_security, sk);
+ kfree(sk->sk_security);
+ sk->sk_security = NULL;
}
void security_sk_clone(const struct sock *sk, struct sock *newsk)
@@ -4319,7 +4319,7 @@ static int socket_sockcreate_sid(const struct task_security_struct *tsec,
static int sock_has_perm(struct sock *sk, u32 perms)
{
- struct sk_security_struct *sksec = sk->sk_security;
+ struct sk_security_struct *sksec = selinux_sock(sk);
struct common_audit_data ad;
struct lsm_network_audit net = {0,};
@@ -4376,7 +4376,7 @@ static int selinux_socket_post_create(struct socket *sock, int family,
isec->initialized = LABEL_INITIALIZED;
if (sock->sk) {
- sksec = sock->sk->sk_security;
+ sksec = selinux_sock(sock->sk);
sksec->sclass = sclass;
sksec->sid = sid;
/* Allows detection of the first association on this socket */
@@ -4392,8 +4392,8 @@ static int selinux_socket_post_create(struct socket *sock, int family,
static int selinux_socket_socketpair(struct socket *socka,
struct socket *sockb)
{
- struct sk_security_struct *sksec_a = socka->sk->sk_security;
- struct sk_security_struct *sksec_b = sockb->sk->sk_security;
+ struct sk_security_struct *sksec_a = selinux_sock(socka->sk);
+ struct sk_security_struct *sksec_b = selinux_sock(sockb->sk);
sksec_a->peer_sid = sksec_b->sid;
sksec_b->peer_sid = sksec_a->sid;
@@ -4408,7 +4408,7 @@ static int selinux_socket_socketpair(struct socket *socka,
static int selinux_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen)
{
struct sock *sk = sock->sk;
- struct sk_security_struct *sksec = sk->sk_security;
+ struct sk_security_struct *sksec = selinux_sock(sk);
u16 family;
int err;
@@ -4540,7 +4540,7 @@ static int selinux_socket_connect_helper(struct socket *sock,
struct sockaddr *address, int addrlen)
{
struct sock *sk = sock->sk;
- struct sk_security_struct *sksec = sk->sk_security;
+ struct sk_security_struct *sksec = selinux_sock(sk);
int err;
err = sock_has_perm(sk, SOCKET__CONNECT);
@@ -4711,9 +4711,9 @@ static int selinux_socket_unix_stream_connect(struct sock *sock,
struct sock *other,
struct sock *newsk)
{
- struct sk_security_struct *sksec_sock = sock->sk_security;
- struct sk_security_struct *sksec_other = other->sk_security;
- struct sk_security_struct *sksec_new = newsk->sk_security;
+ struct sk_security_struct *sksec_sock = selinux_sock(sock);
+ struct sk_security_struct *sksec_other = selinux_sock(other);
+ struct sk_security_struct *sksec_new = selinux_sock(newsk);
struct common_audit_data ad;
struct lsm_network_audit net = {0,};
int err;
@@ -4745,8 +4745,8 @@ static int selinux_socket_unix_stream_connect(struct sock *sock,
static int selinux_socket_unix_may_send(struct socket *sock,
struct socket *other)
{
- struct sk_security_struct *ssec = sock->sk->sk_security;
- struct sk_security_struct *osec = other->sk->sk_security;
+ struct sk_security_struct *ssec = selinux_sock(sock->sk);
+ struct sk_security_struct *osec = selinux_sock(other->sk);
struct common_audit_data ad;
struct lsm_network_audit net = {0,};
@@ -4788,7 +4788,7 @@ static int selinux_sock_rcv_skb_compat(struct sock *sk, struct sk_buff *skb,
u16 family)
{
int err = 0;
- struct sk_security_struct *sksec = sk->sk_security;
+ struct sk_security_struct *sksec = selinux_sock(sk);
u32 sk_sid = sksec->sid;
struct common_audit_data ad;
struct lsm_network_audit net = {0,};
@@ -4821,7 +4821,7 @@ static int selinux_sock_rcv_skb_compat(struct sock *sk, struct sk_buff *skb,
static int selinux_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
{
int err;
- struct sk_security_struct *sksec = sk->sk_security;
+ struct sk_security_struct *sksec = selinux_sock(sk);
u16 family = sk->sk_family;
u32 sk_sid = sksec->sid;
struct common_audit_data ad;
@@ -4889,13 +4889,15 @@ static int selinux_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
return err;
}
-static int selinux_socket_getpeersec_stream(struct socket *sock, char __user *optval,
- int __user *optlen, unsigned len)
+static int selinux_socket_getpeersec_stream(struct socket *sock,
+ __user char *optval,
+ __user int *optlen,
+ unsigned int len)
{
int err = 0;
char *scontext;
u32 scontext_len;
- struct sk_security_struct *sksec = sock->sk->sk_security;
+ struct sk_security_struct *sksec = selinux_sock(sock->sk);
u32 peer_sid = SECSID_NULL;
if (sksec->sclass == SECCLASS_UNIX_STREAM_SOCKET ||
@@ -4955,34 +4957,27 @@ static int selinux_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *
static int selinux_sk_alloc_security(struct sock *sk, int family, gfp_t priority)
{
- struct sk_security_struct *sksec;
-
- sksec = kzalloc(sizeof(*sksec), priority);
- if (!sksec)
- return -ENOMEM;
+ struct sk_security_struct *sksec = selinux_sock(sk);
sksec->peer_sid = SECINITSID_UNLABELED;
sksec->sid = SECINITSID_UNLABELED;
sksec->sclass = SECCLASS_SOCKET;
selinux_netlbl_sk_security_reset(sksec);
- sk->sk_security = sksec;
return 0;
}
static void selinux_sk_free_security(struct sock *sk)
{
- struct sk_security_struct *sksec = sk->sk_security;
+ struct sk_security_struct *sksec = selinux_sock(sk);
- sk->sk_security = NULL;
selinux_netlbl_sk_security_free(sksec);
- kfree(sksec);
}
static void selinux_sk_clone_security(const struct sock *sk, struct sock *newsk)
{
- struct sk_security_struct *sksec = sk->sk_security;
- struct sk_security_struct *newsksec = newsk->sk_security;
+ struct sk_security_struct *sksec = selinux_sock(sk);
+ struct sk_security_struct *newsksec = selinux_sock(newsk);
newsksec->sid = sksec->sid;
newsksec->peer_sid = sksec->peer_sid;
@@ -4996,7 +4991,7 @@ static void selinux_sk_getsecid(struct sock *sk, u32 *secid)
if (!sk)
*secid = SECINITSID_ANY_SOCKET;
else {
- struct sk_security_struct *sksec = sk->sk_security;
+ struct sk_security_struct *sksec = selinux_sock(sk);
*secid = sksec->sid;
}
@@ -5006,7 +5001,7 @@ static void selinux_sock_graft(struct sock *sk, struct socket *parent)
{
struct inode_security_struct *isec =
inode_security_novalidate(SOCK_INODE(parent));
- struct sk_security_struct *sksec = sk->sk_security;
+ struct sk_security_struct *sksec = selinux_sock(sk);
if (sk->sk_family == PF_INET || sk->sk_family == PF_INET6 ||
sk->sk_family == PF_UNIX)
@@ -5021,7 +5016,7 @@ static void selinux_sock_graft(struct sock *sk, struct socket *parent)
static int selinux_sctp_assoc_request(struct sctp_endpoint *ep,
struct sk_buff *skb)
{
- struct sk_security_struct *sksec = ep->base.sk->sk_security;
+ struct sk_security_struct *sksec = selinux_sock(ep->base.sk);
struct common_audit_data ad;
struct lsm_network_audit net = {0,};
u8 peerlbl_active;
@@ -5172,8 +5167,8 @@ static int selinux_sctp_bind_connect(struct sock *sk, int optname,
static void selinux_sctp_sk_clone(struct sctp_endpoint *ep, struct sock *sk,
struct sock *newsk)
{
- struct sk_security_struct *sksec = sk->sk_security;
- struct sk_security_struct *newsksec = newsk->sk_security;
+ struct sk_security_struct *sksec = selinux_sock(sk);
+ struct sk_security_struct *newsksec = selinux_sock(newsk);
/* If policy does not support SECCLASS_SCTP_SOCKET then call
* the non-sctp clone version.
@@ -5190,7 +5185,7 @@ static void selinux_sctp_sk_clone(struct sctp_endpoint *ep, struct sock *sk,
static int selinux_inet_conn_request(struct sock *sk, struct sk_buff *skb,
struct request_sock *req)
{
- struct sk_security_struct *sksec = sk->sk_security;
+ struct sk_security_struct *sksec = selinux_sock(sk);
int err;
u16 family = req->rsk_ops->family;
u32 connsid;
@@ -5211,7 +5206,7 @@ static int selinux_inet_conn_request(struct sock *sk, struct sk_buff *skb,
static void selinux_inet_csk_clone(struct sock *newsk,
const struct request_sock *req)
{
- struct sk_security_struct *newsksec = newsk->sk_security;
+ struct sk_security_struct *newsksec = selinux_sock(newsk);
newsksec->sid = req->secid;
newsksec->peer_sid = req->peer_secid;
@@ -5228,7 +5223,7 @@ static void selinux_inet_csk_clone(struct sock *newsk,
static void selinux_inet_conn_established(struct sock *sk, struct sk_buff *skb)
{
u16 family = sk->sk_family;
- struct sk_security_struct *sksec = sk->sk_security;
+ struct sk_security_struct *sksec = selinux_sock(sk);
/* handle mapped IPv4 packets arriving via IPv6 sockets */
if (family == PF_INET6 && skb->protocol == htons(ETH_P_IP))
@@ -5312,7 +5307,7 @@ static int selinux_tun_dev_attach_queue(void *security)
static int selinux_tun_dev_attach(struct sock *sk, void *security)
{
struct tun_security_struct *tunsec = security;
- struct sk_security_struct *sksec = sk->sk_security;
+ struct sk_security_struct *sksec = selinux_sock(sk);
/* we don't currently perform any NetLabel based labeling here and it
* isn't clear that we would want to do so anyway; while we could apply
@@ -5353,7 +5348,7 @@ static int selinux_nlmsg_perm(struct sock *sk, struct sk_buff *skb)
int err = 0;
u32 perm;
struct nlmsghdr *nlh;
- struct sk_security_struct *sksec = sk->sk_security;
+ struct sk_security_struct *sksec = selinux_sock(sk);
if (skb->len < NLMSG_HDRLEN) {
err = -EINVAL;
@@ -5494,7 +5489,7 @@ static unsigned int selinux_ip_output(struct sk_buff *skb,
return NF_ACCEPT;
/* standard practice, label using the parent socket */
- sksec = sk->sk_security;
+ sksec = selinux_sock(sk);
sid = sksec->sid;
} else
sid = SECINITSID_KERNEL;
@@ -5533,7 +5528,7 @@ static unsigned int selinux_ip_postroute_compat(struct sk_buff *skb,
if (sk == NULL)
return NF_ACCEPT;
- sksec = sk->sk_security;
+ sksec = selinux_sock(sk);
ad.type = LSM_AUDIT_DATA_NET;
ad.u.net = &net;
@@ -5625,7 +5620,7 @@ static unsigned int selinux_ip_postroute(struct sk_buff *skb,
u32 skb_sid;
struct sk_security_struct *sksec;
- sksec = sk->sk_security;
+ sksec = selinux_sock(sk);
if (selinux_skb_peerlbl_sid(skb, family, &skb_sid))
return NF_DROP;
/* At this point, if the returned skb peerlbl is SECSID_NULL
@@ -5654,7 +5649,7 @@ static unsigned int selinux_ip_postroute(struct sk_buff *skb,
} else {
/* Locally generated packet, fetch the security label from the
* associated socket. */
- struct sk_security_struct *sksec = sk->sk_security;
+ struct sk_security_struct *sksec = selinux_sock(sk);
peer_sid = sksec->sid;
secmark_perm = PACKET__SEND;
}
@@ -6633,6 +6628,7 @@ struct lsm_blob_sizes selinux_blob_sizes __lsm_ro_after_init = {
.lbs_inode = sizeof(struct inode_security_struct),
.lbs_ipc = sizeof(struct ipc_security_struct),
.lbs_msg_msg = sizeof(struct msg_security_struct),
+ .lbs_sock = sizeof(struct sk_security_struct),
.lbs_superblock = sizeof(struct superblock_security_struct),
};
@@ -194,4 +194,9 @@ static inline struct superblock_security_struct *selinux_superblock(
return superblock->s_security + selinux_blob_sizes.lbs_superblock;
}
+static inline struct sk_security_struct *selinux_sock(const struct sock *sock)
+{
+ return sock->sk_security + selinux_blob_sizes.lbs_sock;
+}
+
#endif /* _SELINUX_OBJSEC_H_ */
@@ -31,6 +31,7 @@
#include <linux/gfp.h>
#include <linux/ip.h>
#include <linux/ipv6.h>
+#include <linux/lsm_hooks.h>
#include <net/sock.h>
#include <net/netlabel.h>
#include <net/ip.h>
@@ -81,7 +82,7 @@ static int selinux_netlbl_sidlookup_cached(struct sk_buff *skb,
static struct netlbl_lsm_secattr *selinux_netlbl_sock_genattr(struct sock *sk)
{
int rc;
- struct sk_security_struct *sksec = sk->sk_security;
+ struct sk_security_struct *sksec = selinux_sock(sk);
struct netlbl_lsm_secattr *secattr;
if (sksec->nlbl_secattr != NULL)
@@ -114,7 +115,7 @@ static struct netlbl_lsm_secattr *selinux_netlbl_sock_getattr(
const struct sock *sk,
u32 sid)
{
- struct sk_security_struct *sksec = sk->sk_security;
+ struct sk_security_struct *sksec = selinux_sock(sk);
struct netlbl_lsm_secattr *secattr = sksec->nlbl_secattr;
if (secattr == NULL)
@@ -249,7 +250,7 @@ int selinux_netlbl_skbuff_setsid(struct sk_buff *skb,
* being labeled by it's parent socket, if it is just exit */
sk = skb_to_full_sk(skb);
if (sk != NULL) {
- struct sk_security_struct *sksec = sk->sk_security;
+ struct sk_security_struct *sksec = selinux_sock(sk);
if (sksec->nlbl_state != NLBL_REQSKB)
return 0;
@@ -287,7 +288,7 @@ int selinux_netlbl_sctp_assoc_request(struct sctp_endpoint *ep,
{
int rc;
struct netlbl_lsm_secattr secattr;
- struct sk_security_struct *sksec = ep->base.sk->sk_security;
+ struct sk_security_struct *sksec = selinux_sock(ep->base.sk);
struct sockaddr *addr;
struct sockaddr_in addr4;
#if IS_ENABLED(CONFIG_IPV6)
@@ -370,7 +371,7 @@ int selinux_netlbl_inet_conn_request(struct request_sock *req, u16 family)
*/
void selinux_netlbl_inet_csk_clone(struct sock *sk, u16 family)
{
- struct sk_security_struct *sksec = sk->sk_security;
+ struct sk_security_struct *sksec = selinux_sock(sk);
if (family == PF_INET)
sksec->nlbl_state = NLBL_LABELED;
@@ -388,8 +389,8 @@ void selinux_netlbl_inet_csk_clone(struct sock *sk, u16 family)
*/
void selinux_netlbl_sctp_sk_clone(struct sock *sk, struct sock *newsk)
{
- struct sk_security_struct *sksec = sk->sk_security;
- struct sk_security_struct *newsksec = newsk->sk_security;
+ struct sk_security_struct *sksec = selinux_sock(sk);
+ struct sk_security_struct *newsksec = selinux_sock(newsk);
newsksec->nlbl_state = sksec->nlbl_state;
}
@@ -407,7 +408,7 @@ void selinux_netlbl_sctp_sk_clone(struct sock *sk, struct sock *newsk)
int selinux_netlbl_socket_post_create(struct sock *sk, u16 family)
{
int rc;
- struct sk_security_struct *sksec = sk->sk_security;
+ struct sk_security_struct *sksec = selinux_sock(sk);
struct netlbl_lsm_secattr *secattr;
if (family != PF_INET && family != PF_INET6)
@@ -522,7 +523,7 @@ int selinux_netlbl_socket_setsockopt(struct socket *sock,
{
int rc = 0;
struct sock *sk = sock->sk;
- struct sk_security_struct *sksec = sk->sk_security;
+ struct sk_security_struct *sksec = selinux_sock(sk);
struct netlbl_lsm_secattr secattr;
if (selinux_netlbl_option(level, optname) &&
@@ -560,7 +561,7 @@ static int selinux_netlbl_socket_connect_helper(struct sock *sk,
struct sockaddr *addr)
{
int rc;
- struct sk_security_struct *sksec = sk->sk_security;
+ struct sk_security_struct *sksec = selinux_sock(sk);
struct netlbl_lsm_secattr *secattr;
/* connected sockets are allowed to disconnect when the address family
@@ -599,7 +600,7 @@ static int selinux_netlbl_socket_connect_helper(struct sock *sk,
int selinux_netlbl_socket_connect_locked(struct sock *sk,
struct sockaddr *addr)
{
- struct sk_security_struct *sksec = sk->sk_security;
+ struct sk_security_struct *sksec = selinux_sock(sk);
if (sksec->nlbl_state != NLBL_REQSKB &&
sksec->nlbl_state != NLBL_CONNLABELED)
@@ -375,6 +375,11 @@ static inline struct smack_known **smack_ipc(const struct kern_ipc_perm *ipc)
return ipc->security + smack_blob_sizes.lbs_ipc;
}
+static inline struct socket_smack *smack_sock(const struct sock *sock)
+{
+ return sock->sk_security + smack_blob_sizes.lbs_sock;
+}
+
static inline struct superblock_smack *smack_superblock(
const struct super_block *superblock)
{
@@ -1439,7 +1439,7 @@ static int smack_inode_getsecurity(struct inode *inode,
if (sock == NULL || sock->sk == NULL)
return -EOPNOTSUPP;
- ssp = sock->sk->sk_security;
+ ssp = smack_sock(sock->sk);
if (strcmp(name, XATTR_SMACK_IPIN) == 0)
isp = ssp->smk_in;
@@ -1821,7 +1821,7 @@ static int smack_file_receive(struct file *file)
if (inode->i_sb->s_magic == SOCKFS_MAGIC) {
sock = SOCKET_I(inode);
- ssp = sock->sk->sk_security;
+ ssp = smack_sock(sock->sk);
tsp = smack_cred(current_cred());
/*
* If the receiving process can't write to the
@@ -2231,11 +2231,7 @@ static void smack_task_to_inode(struct task_struct *p, struct inode *inode)
static int smack_sk_alloc_security(struct sock *sk, int family, gfp_t gfp_flags)
{
struct smack_known *skp = smk_of_current();
- struct socket_smack *ssp;
-
- ssp = kzalloc(sizeof(struct socket_smack), gfp_flags);
- if (ssp == NULL)
- return -ENOMEM;
+ struct socket_smack *ssp = smack_sock(sk);
/*
* Sockets created by kernel threads receive web label.
@@ -2249,11 +2245,10 @@ static int smack_sk_alloc_security(struct sock *sk, int family, gfp_t gfp_flags)
}
ssp->smk_packet = NULL;
- sk->sk_security = ssp;
-
return 0;
}
+#ifdef SMACK_IPV6_PORT_LABELING
/**
* smack_sk_free_security - Free a socket blob
* @sk: the socket
@@ -2262,7 +2257,6 @@ static int smack_sk_alloc_security(struct sock *sk, int family, gfp_t gfp_flags)
*/
static void smack_sk_free_security(struct sock *sk)
{
-#ifdef SMACK_IPV6_PORT_LABELING
struct smk_port_label *spp;
if (sk->sk_family == PF_INET6) {
@@ -2275,9 +2269,8 @@ static void smack_sk_free_security(struct sock *sk)
}
rcu_read_unlock();
}
-#endif
- kfree(sk->sk_security);
}
+#endif
/**
* smack_ipv4host_label - check host based restrictions
@@ -2395,7 +2388,7 @@ static struct smack_known *smack_ipv6host_label(struct sockaddr_in6 *sip)
static int smack_netlabel(struct sock *sk, int labeled)
{
struct smack_known *skp;
- struct socket_smack *ssp = sk->sk_security;
+ struct socket_smack *ssp = smack_sock(sk);
int rc = 0;
/*
@@ -2440,7 +2433,7 @@ static int smack_netlabel_send(struct sock *sk, struct sockaddr_in *sap)
int rc;
int sk_lbl;
struct smack_known *hkp;
- struct socket_smack *ssp = sk->sk_security;
+ struct socket_smack *ssp = smack_sock(sk);
struct smk_audit_info ad;
rcu_read_lock();
@@ -2516,7 +2509,7 @@ static void smk_ipv6_port_label(struct socket *sock, struct sockaddr *address)
{
struct sock *sk = sock->sk;
struct sockaddr_in6 *addr6;
- struct socket_smack *ssp = sock->sk->sk_security;
+ struct socket_smack *ssp = smack_sock(sock->sk);
struct smk_port_label *spp;
unsigned short port = 0;
@@ -2603,7 +2596,7 @@ static int smk_ipv6_port_check(struct sock *sk, struct sockaddr_in6 *address,
int act)
{
struct smk_port_label *spp;
- struct socket_smack *ssp = sk->sk_security;
+ struct socket_smack *ssp = smack_sock(sk);
struct smack_known *skp = NULL;
unsigned short port;
struct smack_known *object;
@@ -2697,7 +2690,7 @@ static int smack_inode_setsecurity(struct inode *inode, const char *name,
if (sock == NULL || sock->sk == NULL)
return -EOPNOTSUPP;
- ssp = sock->sk->sk_security;
+ ssp = smack_sock(sock->sk);
if (strcmp(name, XATTR_SMACK_IPIN) == 0)
ssp->smk_in = skp;
@@ -2745,7 +2738,7 @@ static int smack_socket_post_create(struct socket *sock, int family,
* Sockets created by kernel threads receive web label.
*/
if (unlikely(current->flags & PF_KTHREAD)) {
- ssp = sock->sk->sk_security;
+ ssp = smack_sock(sock->sk);
ssp->smk_in = &smack_known_web;
ssp->smk_out = &smack_known_web;
}
@@ -2770,8 +2763,8 @@ static int smack_socket_post_create(struct socket *sock, int family,
static int smack_socket_socketpair(struct socket *socka,
struct socket *sockb)
{
- struct socket_smack *asp = socka->sk->sk_security;
- struct socket_smack *bsp = sockb->sk->sk_security;
+ struct socket_smack *asp = smack_sock(socka->sk);
+ struct socket_smack *bsp = smack_sock(sockb->sk);
asp->smk_packet = bsp->smk_out;
bsp->smk_packet = asp->smk_out;
@@ -2825,7 +2818,7 @@ static int smack_socket_connect(struct socket *sock, struct sockaddr *sap,
return 0;
#ifdef SMACK_IPV6_SECMARK_LABELING
- ssp = sock->sk->sk_security;
+ ssp = smack_sock(sock->sk);
#endif
switch (sock->sk->sk_family) {
@@ -3566,9 +3559,9 @@ static int smack_unix_stream_connect(struct sock *sock,
{
struct smack_known *skp;
struct smack_known *okp;
- struct socket_smack *ssp = sock->sk_security;
- struct socket_smack *osp = other->sk_security;
- struct socket_smack *nsp = newsk->sk_security;
+ struct socket_smack *ssp = smack_sock(sock);
+ struct socket_smack *osp = smack_sock(other);
+ struct socket_smack *nsp = smack_sock(newsk);
struct smk_audit_info ad;
int rc = 0;
#ifdef CONFIG_AUDIT
@@ -3614,8 +3607,8 @@ static int smack_unix_stream_connect(struct sock *sock,
*/
static int smack_unix_may_send(struct socket *sock, struct socket *other)
{
- struct socket_smack *ssp = sock->sk->sk_security;
- struct socket_smack *osp = other->sk->sk_security;
+ struct socket_smack *ssp = smack_sock(sock->sk);
+ struct socket_smack *osp = smack_sock(other->sk);
struct smk_audit_info ad;
int rc;
@@ -3652,7 +3645,7 @@ static int smack_socket_sendmsg(struct socket *sock, struct msghdr *msg,
struct sockaddr_in6 *sap = (struct sockaddr_in6 *) msg->msg_name;
#endif
#ifdef SMACK_IPV6_SECMARK_LABELING
- struct socket_smack *ssp = sock->sk->sk_security;
+ struct socket_smack *ssp = smack_sock(sock->sk);
struct smack_known *rsp;
#endif
int rc = 0;
@@ -3817,7 +3810,7 @@ static int smk_skb_to_addr_ipv6(struct sk_buff *skb, struct sockaddr_in6 *sip)
static int smack_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
{
struct netlbl_lsm_secattr secattr;
- struct socket_smack *ssp = sk->sk_security;
+ struct socket_smack *ssp = smack_sock(sk);
struct smack_known *skp = NULL;
int rc = 0;
struct smk_audit_info ad;
@@ -3934,7 +3927,7 @@ static int smack_socket_getpeersec_stream(struct socket *sock,
int slen = 1;
int rc = 0;
- ssp = sock->sk->sk_security;
+ ssp = smack_sock(sock->sk);
if (ssp->smk_packet != NULL) {
rcp = ssp->smk_packet->smk_known;
slen = strlen(rcp) + 1;
@@ -3984,7 +3977,7 @@ static int smack_socket_getpeersec_dgram(struct socket *sock,
switch (family) {
case PF_UNIX:
- ssp = sock->sk->sk_security;
+ ssp = smack_sock(sock->sk);
s = ssp->smk_out->smk_secid;
break;
case PF_INET:
@@ -3997,7 +3990,7 @@ static int smack_socket_getpeersec_dgram(struct socket *sock,
* Translate what netlabel gave us.
*/
if (sock != NULL && sock->sk != NULL)
- ssp = sock->sk->sk_security;
+ ssp = smack_sock(sock->sk);
netlbl_secattr_init(&secattr);
rc = netlbl_skbuff_getattr(skb, family, &secattr);
if (rc == 0) {
@@ -4035,7 +4028,7 @@ static void smack_sock_graft(struct sock *sk, struct socket *parent)
(sk->sk_family != PF_INET && sk->sk_family != PF_INET6))
return;
- ssp = sk->sk_security;
+ ssp = smack_sock(sk);
ssp->smk_in = skp;
ssp->smk_out = skp;
/* cssp->smk_packet is already set in smack_inet_csk_clone() */
@@ -4055,7 +4048,7 @@ static int smack_inet_conn_request(struct sock *sk, struct sk_buff *skb,
{
u16 family = sk->sk_family;
struct smack_known *skp;
- struct socket_smack *ssp = sk->sk_security;
+ struct socket_smack *ssp = smack_sock(sk);
struct netlbl_lsm_secattr secattr;
struct sockaddr_in addr;
struct iphdr *hdr;
@@ -4154,7 +4147,7 @@ static int smack_inet_conn_request(struct sock *sk, struct sk_buff *skb,
static void smack_inet_csk_clone(struct sock *sk,
const struct request_sock *req)
{
- struct socket_smack *ssp = sk->sk_security;
+ struct socket_smack *ssp = smack_sock(sk);
struct smack_known *skp;
if (req->peer_secid != 0) {
@@ -4558,6 +4551,7 @@ struct lsm_blob_sizes smack_blob_sizes __lsm_ro_after_init = {
.lbs_inode = sizeof(struct inode_smack),
.lbs_ipc = sizeof(struct smack_known *),
.lbs_msg_msg = sizeof(struct smack_known *),
+ .lbs_sock = sizeof(struct socket_smack),
.lbs_superblock = sizeof(struct superblock_smack),
};
@@ -4667,7 +4661,9 @@ static struct security_hook_list smack_hooks[] __lsm_ro_after_init = {
LSM_HOOK_INIT(socket_getpeersec_stream, smack_socket_getpeersec_stream),
LSM_HOOK_INIT(socket_getpeersec_dgram, smack_socket_getpeersec_dgram),
LSM_HOOK_INIT(sk_alloc_security, smack_sk_alloc_security),
+#ifdef SMACK_IPV6_PORT_LABELING
LSM_HOOK_INIT(sk_free_security, smack_sk_free_security),
+#endif
LSM_HOOK_INIT(sock_graft, smack_sock_graft),
LSM_HOOK_INIT(inet_conn_request, smack_inet_conn_request),
LSM_HOOK_INIT(inet_csk_clone, smack_inet_csk_clone),
@@ -31,8 +31,8 @@ static unsigned int smack_ipv6_output(void *priv,
struct socket_smack *ssp;
struct smack_known *skp;
- if (sk && sk->sk_security) {
- ssp = sk->sk_security;
+ if (sk && smack_sock(sk)) {
+ ssp = smack_sock(sk);
skp = ssp->smk_out;
skb->secmark = skp->smk_secid;
}
@@ -49,8 +49,8 @@ static unsigned int smack_ipv4_output(void *priv,
struct socket_smack *ssp;
struct smack_known *skp;
- if (sk && sk->sk_security) {
- ssp = sk->sk_security;
+ if (sk && smack_sock(sk)) {
+ ssp = smack_sock(sk);
skp = ssp->smk_out;
skb->secmark = skp->smk_secid;
}