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SELinux: Convert avc_audit to use lsm_audit.h

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Convert avc_audit in security/selinux/avc.c to use lsm_audit.h,
for better maintainability and for less code duplication.

 - changed selinux to use common_audit_data instead of
   avc_audit_data
 - eliminated code in avc.c and used code from lsm_audit.h instead.

I have tested to make sure that the avcs look the same before and
after this patch.

Signed-off-by: Thomas Liu <tliu@redhat.com>
Acked-by: Eric Paris <eparis@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
Thomas Liu
2009-07-10 10:31:04 -04:00
committed by James Morris
parent 65c3f0a2d0
commit 8113a8d80f
8 changed files with 134 additions and 297 deletions
Download Patch File Download Diff File Expand all files Collapse all files

142
security/selinux/hooks.c
View File

@@ -1478,14 +1478,14 @@ static int task_has_capability(struct task_struct *tsk,
const struct cred *cred,
int cap, int audit)
{
struct avc_audit_data ad;
struct common_audit_data ad;
struct av_decision avd;
u16 sclass;
u32 sid = cred_sid(cred);
u32 av = CAP_TO_MASK(cap);
int rc;
AVC_AUDIT_DATA_INIT(&ad, CAP);
COMMON_AUDIT_DATA_INIT(&ad, CAP);
ad.tsk = tsk;
ad.u.cap = cap;
@@ -1524,10 +1524,10 @@ static int task_has_system(struct task_struct *tsk,
static int inode_has_perm(const struct cred *cred,
struct inode *inode,
u32 perms,
struct avc_audit_data *adp)
struct common_audit_data *adp)
{
struct inode_security_struct *isec;
struct avc_audit_data ad;
struct common_audit_data ad;
u32 sid;
if (unlikely(IS_PRIVATE(inode)))
@@ -1538,7 +1538,7 @@ static int inode_has_perm(const struct cred *cred,
if (!adp) {
adp = &ad;
AVC_AUDIT_DATA_INIT(&ad, FS);
COMMON_AUDIT_DATA_INIT(&ad, FS);
ad.u.fs.inode = inode;
}
@@ -1554,9 +1554,9 @@ static inline int dentry_has_perm(const struct cred *cred,
u32 av)
{
struct inode *inode = dentry->d_inode;
struct avc_audit_data ad;
struct common_audit_data ad;
AVC_AUDIT_DATA_INIT(&ad, FS);
COMMON_AUDIT_DATA_INIT(&ad, FS);
ad.u.fs.path.mnt = mnt;
ad.u.fs.path.dentry = dentry;
return inode_has_perm(cred, inode, av, &ad);
@@ -1576,11 +1576,11 @@ static int file_has_perm(const struct cred *cred,
{
struct file_security_struct *fsec = file->f_security;
struct inode *inode = file->f_path.dentry->d_inode;
struct avc_audit_data ad;
struct common_audit_data ad;
u32 sid = cred_sid(cred);
int rc;
AVC_AUDIT_DATA_INIT(&ad, FS);
COMMON_AUDIT_DATA_INIT(&ad, FS);
ad.u.fs.path = file->f_path;
if (sid != fsec->sid) {
@@ -1611,7 +1611,7 @@ static int may_create(struct inode *dir,
struct inode_security_struct *dsec;
struct superblock_security_struct *sbsec;
u32 sid, newsid;
struct avc_audit_data ad;
struct common_audit_data ad;
int rc;
dsec = dir->i_security;
@@ -1620,7 +1620,7 @@ static int may_create(struct inode *dir,
sid = tsec->sid;
newsid = tsec->create_sid;
AVC_AUDIT_DATA_INIT(&ad, FS);
COMMON_AUDIT_DATA_INIT(&ad, FS);
ad.u.fs.path.dentry = dentry;
rc = avc_has_perm(sid, dsec->sid, SECCLASS_DIR,
@@ -1664,7 +1664,7 @@ static int may_link(struct inode *dir,
{
struct inode_security_struct *dsec, *isec;
struct avc_audit_data ad;
struct common_audit_data ad;
u32 sid = current_sid();
u32 av;
int rc;
@@ -1672,7 +1672,7 @@ static int may_link(struct inode *dir,
dsec = dir->i_security;
isec = dentry->d_inode->i_security;
AVC_AUDIT_DATA_INIT(&ad, FS);
COMMON_AUDIT_DATA_INIT(&ad, FS);
ad.u.fs.path.dentry = dentry;
av = DIR__SEARCH;
@@ -1707,7 +1707,7 @@ static inline int may_rename(struct inode *old_dir,
struct dentry *new_dentry)
{
struct inode_security_struct *old_dsec, *new_dsec, *old_isec, *new_isec;
struct avc_audit_data ad;
struct common_audit_data ad;
u32 sid = current_sid();
u32 av;
int old_is_dir, new_is_dir;
@@ -1718,7 +1718,7 @@ static inline int may_rename(struct inode *old_dir,
old_is_dir = S_ISDIR(old_dentry->d_inode->i_mode);
new_dsec = new_dir->i_security;
AVC_AUDIT_DATA_INIT(&ad, FS);
COMMON_AUDIT_DATA_INIT(&ad, FS);
ad.u.fs.path.dentry = old_dentry;
rc = avc_has_perm(sid, old_dsec->sid, SECCLASS_DIR,
@@ -1760,7 +1760,7 @@ static inline int may_rename(struct inode *old_dir,
static int superblock_has_perm(const struct cred *cred,
struct super_block *sb,
u32 perms,
struct avc_audit_data *ad)
struct common_audit_data *ad)
{
struct superblock_security_struct *sbsec;
u32 sid = cred_sid(cred);
@@ -2100,7 +2100,7 @@ static int selinux_bprm_set_creds(struct linux_binprm *bprm)
const struct task_security_struct *old_tsec;
struct task_security_struct *new_tsec;
struct inode_security_struct *isec;
struct avc_audit_data ad;
struct common_audit_data ad;
struct inode *inode = bprm->file->f_path.dentry->d_inode;
int rc;
@@ -2138,7 +2138,7 @@ static int selinux_bprm_set_creds(struct linux_binprm *bprm)
return rc;
}
AVC_AUDIT_DATA_INIT(&ad, FS);
COMMON_AUDIT_DATA_INIT(&ad, FS);
ad.u.fs.path = bprm->file->f_path;
if (bprm->file->f_path.mnt->mnt_flags & MNT_NOSUID)
@@ -2231,7 +2231,7 @@ extern struct dentry *selinux_null;
static inline void flush_unauthorized_files(const struct cred *cred,
struct files_struct *files)
{
struct avc_audit_data ad;
struct common_audit_data ad;
struct file *file, *devnull = NULL;
struct tty_struct *tty;
struct fdtable *fdt;
@@ -2265,7 +2265,7 @@ static inline void flush_unauthorized_files(const struct cred *cred,
/* Revalidate access to inherited open files. */
AVC_AUDIT_DATA_INIT(&ad, FS);
COMMON_AUDIT_DATA_INIT(&ad, FS);
spin_lock(&files->file_lock);
for (;;) {
@@ -2514,7 +2514,7 @@ out:
static int selinux_sb_kern_mount(struct super_block *sb, int flags, void *data)
{
const struct cred *cred = current_cred();
struct avc_audit_data ad;
struct common_audit_data ad;
int rc;
rc = superblock_doinit(sb, data);
@@ -2525,7 +2525,7 @@ static int selinux_sb_kern_mount(struct super_block *sb, int flags, void *data)
if (flags & MS_KERNMOUNT)
return 0;
AVC_AUDIT_DATA_INIT(&ad, FS);
COMMON_AUDIT_DATA_INIT(&ad, FS);
ad.u.fs.path.dentry = sb->s_root;
return superblock_has_perm(cred, sb, FILESYSTEM__MOUNT, &ad);
}
@@ -2533,9 +2533,9 @@ static int selinux_sb_kern_mount(struct super_block *sb, int flags, void *data)
static int selinux_sb_statfs(struct dentry *dentry)
{
const struct cred *cred = current_cred();
struct avc_audit_data ad;
struct common_audit_data ad;
AVC_AUDIT_DATA_INIT(&ad, FS);
COMMON_AUDIT_DATA_INIT(&ad, FS);
ad.u.fs.path.dentry = dentry->d_sb->s_root;
return superblock_has_perm(cred, dentry->d_sb, FILESYSTEM__GETATTR, &ad);
}
@@ -2755,7 +2755,7 @@ static int selinux_inode_setxattr(struct dentry *dentry, const char *name,
struct inode *inode = dentry->d_inode;
struct inode_security_struct *isec = inode->i_security;
struct superblock_security_struct *sbsec;
struct avc_audit_data ad;
struct common_audit_data ad;
u32 newsid, sid = current_sid();
int rc = 0;
@@ -2769,7 +2769,7 @@ static int selinux_inode_setxattr(struct dentry *dentry, const char *name,
if (!is_owner_or_cap(inode))
return -EPERM;
AVC_AUDIT_DATA_INIT(&ad, FS);
COMMON_AUDIT_DATA_INIT(&ad, FS);
ad.u.fs.path.dentry = dentry;
rc = avc_has_perm(sid, isec->sid, isec->sclass,
@@ -3401,7 +3401,7 @@ static void selinux_task_to_inode(struct task_struct *p,
/* Returns error only if unable to parse addresses */
static int selinux_parse_skb_ipv4(struct sk_buff *skb,
struct avc_audit_data *ad, u8 *proto)
struct common_audit_data *ad, u8 *proto)
{
int offset, ihlen, ret = -EINVAL;
struct iphdr _iph, *ih;
@@ -3482,7 +3482,7 @@ out:
/* Returns error only if unable to parse addresses */
static int selinux_parse_skb_ipv6(struct sk_buff *skb,
struct avc_audit_data *ad, u8 *proto)
struct common_audit_data *ad, u8 *proto)
{
u8 nexthdr;
int ret = -EINVAL, offset;
@@ -3553,7 +3553,7 @@ out:
#endif /* IPV6 */
static int selinux_parse_skb(struct sk_buff *skb, struct avc_audit_data *ad,
static int selinux_parse_skb(struct sk_buff *skb, struct common_audit_data *ad,
char **_addrp, int src, u8 *proto)
{
char *addrp;
@@ -3635,7 +3635,7 @@ static int socket_has_perm(struct task_struct *task, struct socket *sock,
u32 perms)
{
struct inode_security_struct *isec;
struct avc_audit_data ad;
struct common_audit_data ad;
u32 sid;
int err = 0;
@@ -3645,7 +3645,7 @@ static int socket_has_perm(struct task_struct *task, struct socket *sock,
goto out;
sid = task_sid(task);
AVC_AUDIT_DATA_INIT(&ad, NET);
COMMON_AUDIT_DATA_INIT(&ad, NET);
ad.u.net.sk = sock->sk;
err = avc_has_perm(sid, isec->sid, isec->sclass, perms, &ad);
@@ -3732,7 +3732,7 @@ static int selinux_socket_bind(struct socket *sock, struct sockaddr *address, in
if (family == PF_INET || family == PF_INET6) {
char *addrp;
struct inode_security_struct *isec;
struct avc_audit_data ad;
struct common_audit_data ad;
struct sockaddr_in *addr4 = NULL;
struct sockaddr_in6 *addr6 = NULL;
unsigned short snum;
@@ -3761,7 +3761,7 @@ static int selinux_socket_bind(struct socket *sock, struct sockaddr *address, in
snum, &sid);
if (err)
goto out;
AVC_AUDIT_DATA_INIT(&ad, NET);
COMMON_AUDIT_DATA_INIT(&ad, NET);
ad.u.net.sport = htons(snum);
ad.u.net.family = family;
err = avc_has_perm(isec->sid, sid,
@@ -3794,7 +3794,7 @@ static int selinux_socket_bind(struct socket *sock, struct sockaddr *address, in
if (err)
goto out;
AVC_AUDIT_DATA_INIT(&ad, NET);
COMMON_AUDIT_DATA_INIT(&ad, NET);
ad.u.net.sport = htons(snum);
ad.u.net.family = family;
@@ -3828,7 +3828,7 @@ static int selinux_socket_connect(struct socket *sock, struct sockaddr *address,
isec = SOCK_INODE(sock)->i_security;
if (isec->sclass == SECCLASS_TCP_SOCKET ||
isec->sclass == SECCLASS_DCCP_SOCKET) {
struct avc_audit_data ad;
struct common_audit_data ad;
struct sockaddr_in *addr4 = NULL;
struct sockaddr_in6 *addr6 = NULL;
unsigned short snum;
@@ -3853,7 +3853,7 @@ static int selinux_socket_connect(struct socket *sock, struct sockaddr *address,
perm = (isec->sclass == SECCLASS_TCP_SOCKET) ?
TCP_SOCKET__NAME_CONNECT : DCCP_SOCKET__NAME_CONNECT;
AVC_AUDIT_DATA_INIT(&ad, NET);
COMMON_AUDIT_DATA_INIT(&ad, NET);
ad.u.net.dport = htons(snum);
ad.u.net.family = sk->sk_family;
err = avc_has_perm(isec->sid, sid, isec->sclass, perm, &ad);
@@ -3943,13 +3943,13 @@ static int selinux_socket_unix_stream_connect(struct socket *sock,
struct sk_security_struct *ssec;
struct inode_security_struct *isec;
struct inode_security_struct *other_isec;
struct avc_audit_data ad;
struct common_audit_data ad;
int err;
isec = SOCK_INODE(sock)->i_security;
other_isec = SOCK_INODE(other)->i_security;
AVC_AUDIT_DATA_INIT(&ad, NET);
COMMON_AUDIT_DATA_INIT(&ad, NET);
ad.u.net.sk = other->sk;
err = avc_has_perm(isec->sid, other_isec->sid,
@@ -3975,13 +3975,13 @@ static int selinux_socket_unix_may_send(struct socket *sock,
{
struct inode_security_struct *isec;
struct inode_security_struct *other_isec;
struct avc_audit_data ad;
struct common_audit_data ad;
int err;
isec = SOCK_INODE(sock)->i_security;
other_isec = SOCK_INODE(other)->i_security;
AVC_AUDIT_DATA_INIT(&ad, NET);
COMMON_AUDIT_DATA_INIT(&ad, NET);
ad.u.net.sk = other->sk;
err = avc_has_perm(isec->sid, other_isec->sid,
@@ -3994,7 +3994,7 @@ static int selinux_socket_unix_may_send(struct socket *sock,
static int selinux_inet_sys_rcv_skb(int ifindex, char *addrp, u16 family,
u32 peer_sid,
struct avc_audit_data *ad)
struct common_audit_data *ad)
{
int err;
u32 if_sid;
@@ -4022,10 +4022,10 @@ static int selinux_sock_rcv_skb_compat(struct sock *sk, struct sk_buff *skb,
struct sk_security_struct *sksec = sk->sk_security;
u32 peer_sid;
u32 sk_sid = sksec->sid;
struct avc_audit_data ad;
struct common_audit_data ad;
char *addrp;
AVC_AUDIT_DATA_INIT(&ad, NET);
COMMON_AUDIT_DATA_INIT(&ad, NET);
ad.u.net.netif = skb->iif;
ad.u.net.family = family;
err = selinux_parse_skb(skb, &ad, &addrp, 1, NULL);
@@ -4063,7 +4063,7 @@ static int selinux_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
struct sk_security_struct *sksec = sk->sk_security;
u16 family = sk->sk_family;
u32 sk_sid = sksec->sid;
struct avc_audit_data ad;
struct common_audit_data ad;
char *addrp;
u8 secmark_active;
u8 peerlbl_active;
@@ -4087,7 +4087,7 @@ static int selinux_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
if (!secmark_active && !peerlbl_active)
return 0;
AVC_AUDIT_DATA_INIT(&ad, NET);
COMMON_AUDIT_DATA_INIT(&ad, NET);
ad.u.net.netif = skb->iif;
ad.u.net.family = family;
err = selinux_parse_skb(skb, &ad, &addrp, 1, NULL);
@@ -4345,7 +4345,7 @@ static unsigned int selinux_ip_forward(struct sk_buff *skb, int ifindex,
int err;
char *addrp;
u32 peer_sid;
struct avc_audit_data ad;
struct common_audit_data ad;
u8 secmark_active;
u8 netlbl_active;
u8 peerlbl_active;
@@ -4362,7 +4362,7 @@ static unsigned int selinux_ip_forward(struct sk_buff *skb, int ifindex,
if (selinux_skb_peerlbl_sid(skb, family, &peer_sid) != 0)
return NF_DROP;
AVC_AUDIT_DATA_INIT(&ad, NET);
COMMON_AUDIT_DATA_INIT(&ad, NET);
ad.u.net.netif = ifindex;
ad.u.net.family = family;
if (selinux_parse_skb(skb, &ad, &addrp, 1, NULL) != 0)
@@ -4450,7 +4450,7 @@ static unsigned int selinux_ip_postroute_compat(struct sk_buff *skb,
{
struct sock *sk = skb->sk;
struct sk_security_struct *sksec;
struct avc_audit_data ad;
struct common_audit_data ad;
char *addrp;
u8 proto;
@@ -4458,7 +4458,7 @@ static unsigned int selinux_ip_postroute_compat(struct sk_buff *skb,
return NF_ACCEPT;
sksec = sk->sk_security;
AVC_AUDIT_DATA_INIT(&ad, NET);
COMMON_AUDIT_DATA_INIT(&ad, NET);
ad.u.net.netif = ifindex;
ad.u.net.family = family;
if (selinux_parse_skb(skb, &ad, &addrp, 0, &proto))
@@ -4482,7 +4482,7 @@ static unsigned int selinux_ip_postroute(struct sk_buff *skb, int ifindex,
u32 secmark_perm;
u32 peer_sid;
struct sock *sk;
struct avc_audit_data ad;
struct common_audit_data ad;
char *addrp;
u8 secmark_active;
u8 peerlbl_active;
@@ -4541,7 +4541,7 @@ static unsigned int selinux_ip_postroute(struct sk_buff *skb, int ifindex,
secmark_perm = PACKET__SEND;
}
AVC_AUDIT_DATA_INIT(&ad, NET);
COMMON_AUDIT_DATA_INIT(&ad, NET);
ad.u.net.netif = ifindex;
ad.u.net.family = family;
if (selinux_parse_skb(skb, &ad, &addrp, 0, NULL))
@@ -4611,13 +4611,13 @@ static int selinux_netlink_send(struct sock *sk, struct sk_buff *skb)
static int selinux_netlink_recv(struct sk_buff *skb, int capability)
{
int err;
struct avc_audit_data ad;
struct common_audit_data ad;
err = cap_netlink_recv(skb, capability);
if (err)
return err;
AVC_AUDIT_DATA_INIT(&ad, CAP);
COMMON_AUDIT_DATA_INIT(&ad, CAP);
ad.u.cap = capability;
return avc_has_perm(NETLINK_CB(skb).sid, NETLINK_CB(skb).sid,
@@ -4676,12 +4676,12 @@ static int ipc_has_perm(struct kern_ipc_perm *ipc_perms,
u32 perms)
{
struct ipc_security_struct *isec;
struct avc_audit_data ad;
struct common_audit_data ad;
u32 sid = current_sid();
isec = ipc_perms->security;
AVC_AUDIT_DATA_INIT(&ad, IPC);
COMMON_AUDIT_DATA_INIT(&ad, IPC);
ad.u.ipc_id = ipc_perms->key;
return avc_has_perm(sid, isec->sid, isec->sclass, perms, &ad);
@@ -4701,7 +4701,7 @@ static void selinux_msg_msg_free_security(struct msg_msg *msg)
static int selinux_msg_queue_alloc_security(struct msg_queue *msq)
{
struct ipc_security_struct *isec;
struct avc_audit_data ad;
struct common_audit_data ad;
u32 sid = current_sid();
int rc;
@@ -4711,7 +4711,7 @@ static int selinux_msg_queue_alloc_security(struct msg_queue *msq)
isec = msq->q_perm.security;
AVC_AUDIT_DATA_INIT(&ad, IPC);
COMMON_AUDIT_DATA_INIT(&ad, IPC);
ad.u.ipc_id = msq->q_perm.key;
rc = avc_has_perm(sid, isec->sid, SECCLASS_MSGQ,
@@ -4731,12 +4731,12 @@ static void selinux_msg_queue_free_security(struct msg_queue *msq)
static int selinux_msg_queue_associate(struct msg_queue *msq, int msqflg)
{
struct ipc_security_struct *isec;
struct avc_audit_data ad;
struct common_audit_data ad;
u32 sid = current_sid();
isec = msq->q_perm.security;
AVC_AUDIT_DATA_INIT(&ad, IPC);
COMMON_AUDIT_DATA_INIT(&ad, IPC);
ad.u.ipc_id = msq->q_perm.key;
return avc_has_perm(sid, isec->sid, SECCLASS_MSGQ,
@@ -4775,7 +4775,7 @@ static int selinux_msg_queue_msgsnd(struct msg_queue *msq, struct msg_msg *msg,
{
struct ipc_security_struct *isec;
struct msg_security_struct *msec;
struct avc_audit_data ad;
struct common_audit_data ad;
u32 sid = current_sid();
int rc;
@@ -4796,7 +4796,7 @@ static int selinux_msg_queue_msgsnd(struct msg_queue *msq, struct msg_msg *msg,
return rc;
}
AVC_AUDIT_DATA_INIT(&ad, IPC);
COMMON_AUDIT_DATA_INIT(&ad, IPC);
ad.u.ipc_id = msq->q_perm.key;
/* Can this process write to the queue? */
@@ -4820,14 +4820,14 @@ static int selinux_msg_queue_msgrcv(struct msg_queue *msq, struct msg_msg *msg,
{
struct ipc_security_struct *isec;
struct msg_security_struct *msec;
struct avc_audit_data ad;
struct common_audit_data ad;
u32 sid = task_sid(target);
int rc;
isec = msq->q_perm.security;
msec = msg->security;
AVC_AUDIT_DATA_INIT(&ad, IPC);
COMMON_AUDIT_DATA_INIT(&ad, IPC);
ad.u.ipc_id = msq->q_perm.key;
rc = avc_has_perm(sid, isec->sid,
@@ -4842,7 +4842,7 @@ static int selinux_msg_queue_msgrcv(struct msg_queue *msq, struct msg_msg *msg,
static int selinux_shm_alloc_security(struct shmid_kernel *shp)
{
struct ipc_security_struct *isec;
struct avc_audit_data ad;
struct common_audit_data ad;
u32 sid = current_sid();
int rc;
@@ -4852,7 +4852,7 @@ static int selinux_shm_alloc_security(struct shmid_kernel *shp)
isec = shp->shm_perm.security;
AVC_AUDIT_DATA_INIT(&ad, IPC);
COMMON_AUDIT_DATA_INIT(&ad, IPC);
ad.u.ipc_id = shp->shm_perm.key;
rc = avc_has_perm(sid, isec->sid, SECCLASS_SHM,
@@ -4872,12 +4872,12 @@ static void selinux_shm_free_security(struct shmid_kernel *shp)
static int selinux_shm_associate(struct shmid_kernel *shp, int shmflg)
{
struct ipc_security_struct *isec;
struct avc_audit_data ad;
struct common_audit_data ad;
u32 sid = current_sid();
isec = shp->shm_perm.security;
AVC_AUDIT_DATA_INIT(&ad, IPC);
COMMON_AUDIT_DATA_INIT(&ad, IPC);
ad.u.ipc_id = shp->shm_perm.key;
return avc_has_perm(sid, isec->sid, SECCLASS_SHM,
@@ -4934,7 +4934,7 @@ static int selinux_shm_shmat(struct shmid_kernel *shp,
static int selinux_sem_alloc_security(struct sem_array *sma)
{
struct ipc_security_struct *isec;
struct avc_audit_data ad;
struct common_audit_data ad;
u32 sid = current_sid();
int rc;
@@ -4944,7 +4944,7 @@ static int selinux_sem_alloc_security(struct sem_array *sma)
isec = sma->sem_perm.security;
AVC_AUDIT_DATA_INIT(&ad, IPC);
COMMON_AUDIT_DATA_INIT(&ad, IPC);
ad.u.ipc_id = sma->sem_perm.key;
rc = avc_has_perm(sid, isec->sid, SECCLASS_SEM,
@@ -4964,12 +4964,12 @@ static void selinux_sem_free_security(struct sem_array *sma)
static int selinux_sem_associate(struct sem_array *sma, int semflg)
{
struct ipc_security_struct *isec;
struct avc_audit_data ad;
struct common_audit_data ad;
u32 sid = current_sid();
isec = sma->sem_perm.security;
AVC_AUDIT_DATA_INIT(&ad, IPC);
COMMON_AUDIT_DATA_INIT(&ad, IPC);
ad.u.ipc_id = sma->sem_perm.key;
return avc_has_perm(sid, isec->sid, SECCLASS_SEM,