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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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21
include/linux/security.h
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@@ -49,7 +49,6 @@ struct qstr;
struct iattr;
struct fown_struct;
struct file_operations;
struct shmid_kernel;
struct msg_msg;
struct msg_queue;
struct xattr;
@@ -362,11 +361,11 @@ int security_msg_queue_msgsnd(struct msg_queue *msq,
struct msg_msg *msg, int msqflg);
int security_msg_queue_msgrcv(struct msg_queue *msq, struct msg_msg *msg,
struct task_struct *target, long type, int mode);
int security_shm_alloc(struct shmid_kernel *shp);
void security_shm_free(struct shmid_kernel *shp);
int security_shm_associate(struct shmid_kernel *shp, int shmflg);
int security_shm_shmctl(struct shmid_kernel *shp, int cmd);
int security_shm_shmat(struct shmid_kernel *shp, char __user *shmaddr, int shmflg);
int security_shm_alloc(struct kern_ipc_perm *shp);
void security_shm_free(struct kern_ipc_perm *shp);
int security_shm_associate(struct kern_ipc_perm *shp, int shmflg);
int security_shm_shmctl(struct kern_ipc_perm *shp, int cmd);
int security_shm_shmat(struct kern_ipc_perm *shp, char __user *shmaddr, int shmflg);
int security_sem_alloc(struct kern_ipc_perm *sma);
void security_sem_free(struct kern_ipc_perm *sma);
int security_sem_associate(struct kern_ipc_perm *sma, int semflg);
@@ -1077,26 +1076,26 @@ static inline int security_msg_queue_msgrcv(struct msg_queue *msq,
return 0;
}
static inline int security_shm_alloc(struct shmid_kernel *shp)
static inline int security_shm_alloc(struct kern_ipc_perm *shp)
{
return 0;
}
static inline void security_shm_free(struct shmid_kernel *shp)
static inline void security_shm_free(struct kern_ipc_perm *shp)
{ }
static inline int security_shm_associate(struct shmid_kernel *shp,
static inline int security_shm_associate(struct kern_ipc_perm *shp,
int shmflg)
{
return 0;
}
static inline int security_shm_shmctl(struct shmid_kernel *shp, int cmd)
static inline int security_shm_shmctl(struct kern_ipc_perm *shp, int cmd)
{
return 0;
}
static inline int security_shm_shmat(struct shmid_kernel *shp,
static inline int security_shm_shmat(struct kern_ipc_perm *shp,
char __user *shmaddr, int shmflg)
{
return 0;