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sem/security: Pass kern_ipc_perm not sem_array into the sem security hooks

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All of the implementations of security hooks that take sem_array only
access sem_perm the struct kern_ipc_perm member.  This means the
dependencies of the sem security hooks can be simplified by passing
the kern_ipc_perm member of sem_array.

Making this change will allow struct sem and struct sem_array
to become private to ipc/sem.c.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman
2018-03-22 20:52:43 -05:00
parent dd206bec9a
commit aefad9593e
6 changed files with 53 additions and 57 deletions
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22
security/smack/smack_lsm.c
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@@ -3077,9 +3077,9 @@ static int smack_shm_shmat(struct shmid_kernel *shp, char __user *shmaddr,
*
* Returns a pointer to the smack value
*/
static struct smack_known *smack_of_sem(struct sem_array *sma)
static struct smack_known *smack_of_sem(struct kern_ipc_perm *sma)
{
return (struct smack_known *)sma->sem_perm.security;
return (struct smack_known *)sma->security;
}
/**
@@ -3088,9 +3088,9 @@ static struct smack_known *smack_of_sem(struct sem_array *sma)
*
* Returns 0
*/
static int smack_sem_alloc_security(struct sem_array *sma)
static int smack_sem_alloc_security(struct kern_ipc_perm *sma)
{
struct kern_ipc_perm *isp = &sma->sem_perm;
struct kern_ipc_perm *isp = sma;
struct smack_known *skp = smk_of_current();
isp->security = skp;
@@ -3103,9 +3103,9 @@ static int smack_sem_alloc_security(struct sem_array *sma)
*
* Clears the blob pointer
*/
static void smack_sem_free_security(struct sem_array *sma)
static void smack_sem_free_security(struct kern_ipc_perm *sma)
{
struct kern_ipc_perm *isp = &sma->sem_perm;
struct kern_ipc_perm *isp = sma;
isp->security = NULL;
}
@@ -3117,7 +3117,7 @@ static void smack_sem_free_security(struct sem_array *sma)
*
* Returns 0 if current has the requested access, error code otherwise
*/
static int smk_curacc_sem(struct sem_array *sma, int access)
static int smk_curacc_sem(struct kern_ipc_perm *sma, int access)
{
struct smack_known *ssp = smack_of_sem(sma);
struct smk_audit_info ad;
@@ -3125,7 +3125,7 @@ static int smk_curacc_sem(struct sem_array *sma, int access)
#ifdef CONFIG_AUDIT
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_IPC);
ad.a.u.ipc_id = sma->sem_perm.id;
ad.a.u.ipc_id = sma->id;
#endif
rc = smk_curacc(ssp, access, &ad);
rc = smk_bu_current("sem", ssp, access, rc);
@@ -3139,7 +3139,7 @@ static int smk_curacc_sem(struct sem_array *sma, int access)
*
* Returns 0 if current has the requested access, error code otherwise
*/
static int smack_sem_associate(struct sem_array *sma, int semflg)
static int smack_sem_associate(struct kern_ipc_perm *sma, int semflg)
{
int may;
@@ -3154,7 +3154,7 @@ static int smack_sem_associate(struct sem_array *sma, int semflg)
*
* Returns 0 if current has the requested access, error code otherwise
*/
static int smack_sem_semctl(struct sem_array *sma, int cmd)
static int smack_sem_semctl(struct kern_ipc_perm *sma, int cmd)
{
int may;
@@ -3198,7 +3198,7 @@ static int smack_sem_semctl(struct sem_array *sma, int cmd)
*
* Returns 0 if access is allowed, error code otherwise
*/
static int smack_sem_semop(struct sem_array *sma, struct sembuf *sops,
static int smack_sem_semop(struct kern_ipc_perm *sma, struct sembuf *sops,
unsigned nsops, int alter)
{
return smk_curacc_sem(sma, MAY_READWRITE);