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shm/security: Pass kern_ipc_perm not shmid_kernel into the shm security hooks

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All of the implementations of security hooks that take shmid_kernel only
access shm_perm the struct kern_ipc_perm member.  This means the
dependencies of the shm security hooks can be simplified by passing
the kern_ipc_perm member of shmid_kernel..

Making this change will allow struct shmid_kernel to become private to ipc/shm.c.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman
2018-03-22 21:08:27 -05:00
parent aefad9593e
commit 7191adff2a
6 changed files with 52 additions and 56 deletions
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22
security/smack/smack_lsm.c
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@@ -2950,9 +2950,9 @@ static void smack_msg_msg_free_security(struct msg_msg *msg)
*
* Returns a pointer to the smack value
*/
static struct smack_known *smack_of_shm(struct shmid_kernel *shp)
static struct smack_known *smack_of_shm(struct kern_ipc_perm *shp)
{
return (struct smack_known *)shp->shm_perm.security;
return (struct smack_known *)shp->security;
}
/**
@@ -2961,9 +2961,9 @@ static struct smack_known *smack_of_shm(struct shmid_kernel *shp)
*
* Returns 0
*/
static int smack_shm_alloc_security(struct shmid_kernel *shp)
static int smack_shm_alloc_security(struct kern_ipc_perm *shp)
{
struct kern_ipc_perm *isp = &shp->shm_perm;
struct kern_ipc_perm *isp = shp;
struct smack_known *skp = smk_of_current();
isp->security = skp;
@@ -2976,9 +2976,9 @@ static int smack_shm_alloc_security(struct shmid_kernel *shp)
*
* Clears the blob pointer
*/
static void smack_shm_free_security(struct shmid_kernel *shp)
static void smack_shm_free_security(struct kern_ipc_perm *shp)
{
struct kern_ipc_perm *isp = &shp->shm_perm;
struct kern_ipc_perm *isp = shp;
isp->security = NULL;
}
@@ -2990,7 +2990,7 @@ static void smack_shm_free_security(struct shmid_kernel *shp)
*
* Returns 0 if current has the requested access, error code otherwise
*/
static int smk_curacc_shm(struct shmid_kernel *shp, int access)
static int smk_curacc_shm(struct kern_ipc_perm *shp, int access)
{
struct smack_known *ssp = smack_of_shm(shp);
struct smk_audit_info ad;
@@ -2998,7 +2998,7 @@ static int smk_curacc_shm(struct shmid_kernel *shp, int access)
#ifdef CONFIG_AUDIT
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_IPC);
ad.a.u.ipc_id = shp->shm_perm.id;
ad.a.u.ipc_id = shp->id;
#endif
rc = smk_curacc(ssp, access, &ad);
rc = smk_bu_current("shm", ssp, access, rc);
@@ -3012,7 +3012,7 @@ static int smk_curacc_shm(struct shmid_kernel *shp, int access)
*
* Returns 0 if current has the requested access, error code otherwise
*/
static int smack_shm_associate(struct shmid_kernel *shp, int shmflg)
static int smack_shm_associate(struct kern_ipc_perm *shp, int shmflg)
{
int may;
@@ -3027,7 +3027,7 @@ static int smack_shm_associate(struct shmid_kernel *shp, int shmflg)
*
* Returns 0 if current has the requested access, error code otherwise
*/
static int smack_shm_shmctl(struct shmid_kernel *shp, int cmd)
static int smack_shm_shmctl(struct kern_ipc_perm *shp, int cmd)
{
int may;
@@ -3062,7 +3062,7 @@ static int smack_shm_shmctl(struct shmid_kernel *shp, int cmd)
*
* Returns 0 if current has the requested access, error code otherwise
*/
static int smack_shm_shmat(struct shmid_kernel *shp, char __user *shmaddr,
static int smack_shm_shmat(struct kern_ipc_perm *shp, char __user *shmaddr,
int shmflg)
{
int may;