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ipc/smack: Tidy up from the change in type of the ipc security hooks

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Rename the variables shp, sma, msq to isp. As that is how the code already
refers to those variables.

Collapse smack_of_shm, smack_of_sem, and smack_of_msq into smack_of_ipc,
as the three functions had become completely identical.

Collapse smack_shm_alloc_security, smack_sem_alloc_security and
smack_msg_queue_alloc_security into smack_ipc_alloc_security as the three
functions had become identical.

Collapse smack_shm_free_security, smack_sem_free_security and
smack_msg_queue_free_security into smack_ipc_free_security as the
three functions had become identical.

Requested-by: Casey Schaufler <casey@schaufler-ca.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman 2018-03-23 23:56:19 -05:00
parent 50ab44b1c5
commit 0d79cbf83b
1 changed files with 58 additions and 139 deletions
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197
security/smack/smack_lsm.c
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@ -2945,25 +2945,24 @@ static void smack_msg_msg_free_security(struct msg_msg *msg)
}
/**
* smack_of_shm - the smack pointer for the shm
* @shp: the object
* smack_of_ipc - the smack pointer for the ipc
* @isp: the object
*
* Returns a pointer to the smack value
*/
static struct smack_known *smack_of_shm(struct kern_ipc_perm *shp)
static struct smack_known *smack_of_ipc(struct kern_ipc_perm *isp)
{
return (struct smack_known *)shp->security;
return (struct smack_known *)isp->security;
}
/**
* smack_shm_alloc_security - Set the security blob for shm
* @shp: the object
* smack_ipc_alloc_security - Set the security blob for ipc
* @isp: the object
*
* Returns 0
*/
static int smack_shm_alloc_security(struct kern_ipc_perm *shp)
static int smack_ipc_alloc_security(struct kern_ipc_perm *isp)
{
struct kern_ipc_perm *isp = shp;
struct smack_known *skp = smk_of_current();
isp->security = skp;
@ -2971,34 +2970,32 @@ static int smack_shm_alloc_security(struct kern_ipc_perm *shp)
}
/**
* smack_shm_free_security - Clear the security blob for shm
* @shp: the object
* smack_ipc_free_security - Clear the security blob for ipc
* @isp: the object
*
* Clears the blob pointer
*/
static void smack_shm_free_security(struct kern_ipc_perm *shp)
static void smack_ipc_free_security(struct kern_ipc_perm *isp)
{
struct kern_ipc_perm *isp = shp;
isp->security = NULL;
}
/**
* smk_curacc_shm : check if current has access on shm
* @shp : the object
* @isp : the object
* @access : access requested
*
* Returns 0 if current has the requested access, error code otherwise
*/
static int smk_curacc_shm(struct kern_ipc_perm *shp, int access)
static int smk_curacc_shm(struct kern_ipc_perm *isp, int access)
{
struct smack_known *ssp = smack_of_shm(shp);
struct smack_known *ssp = smack_of_ipc(isp);
struct smk_audit_info ad;
int rc;
#ifdef CONFIG_AUDIT
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_IPC);
ad.a.u.ipc_id = shp->id;
ad.a.u.ipc_id = isp->id;
#endif
rc = smk_curacc(ssp, access, &ad);
rc = smk_bu_current("shm", ssp, access, rc);
@ -3007,27 +3004,27 @@ static int smk_curacc_shm(struct kern_ipc_perm *shp, int access)
/**
* smack_shm_associate - Smack access check for shm
* @shp: the object
* @isp: the object
* @shmflg: access requested
*
* Returns 0 if current has the requested access, error code otherwise
*/
static int smack_shm_associate(struct kern_ipc_perm *shp, int shmflg)
static int smack_shm_associate(struct kern_ipc_perm *isp, int shmflg)
{
int may;
may = smack_flags_to_may(shmflg);
return smk_curacc_shm(shp, may);
return smk_curacc_shm(isp, may);
}
/**
* smack_shm_shmctl - Smack access check for shm
* @shp: the object
* @isp: the object
* @cmd: what it wants to do
*
* Returns 0 if current has the requested access, error code otherwise
*/
static int smack_shm_shmctl(struct kern_ipc_perm *shp, int cmd)
static int smack_shm_shmctl(struct kern_ipc_perm *isp, int cmd)
{
int may;
@ -3051,81 +3048,42 @@ static int smack_shm_shmctl(struct kern_ipc_perm *shp, int cmd)
default:
return -EINVAL;
}
return smk_curacc_shm(shp, may);
return smk_curacc_shm(isp, may);
}
/**
* smack_shm_shmat - Smack access for shmat
* @shp: the object
* @isp: the object
* @shmaddr: unused
* @shmflg: access requested
*
* Returns 0 if current has the requested access, error code otherwise
*/
static int smack_shm_shmat(struct kern_ipc_perm *shp, char __user *shmaddr,
static int smack_shm_shmat(struct kern_ipc_perm *ipc, char __user *shmaddr,
int shmflg)
{
int may;
may = smack_flags_to_may(shmflg);
return smk_curacc_shm(shp, may);
}
/**
* smack_of_sem - the smack pointer for the sem
* @sma: the object
*
* Returns a pointer to the smack value
*/
static struct smack_known *smack_of_sem(struct kern_ipc_perm *sma)
{
return (struct smack_known *)sma->security;
}
/**
* smack_sem_alloc_security - Set the security blob for sem
* @sma: the object
*
* Returns 0
*/
static int smack_sem_alloc_security(struct kern_ipc_perm *sma)
{
struct kern_ipc_perm *isp = sma;
struct smack_known *skp = smk_of_current();
isp->security = skp;
return 0;
}
/**
* smack_sem_free_security - Clear the security blob for sem
* @sma: the object
*
* Clears the blob pointer
*/
static void smack_sem_free_security(struct kern_ipc_perm *sma)
{
struct kern_ipc_perm *isp = sma;
isp->security = NULL;
return smk_curacc_shm(ipc, may);
}
/**
* smk_curacc_sem : check if current has access on sem
* @sma : the object
* @isp : the object
* @access : access requested
*
* Returns 0 if current has the requested access, error code otherwise
*/
static int smk_curacc_sem(struct kern_ipc_perm *sma, int access)
static int smk_curacc_sem(struct kern_ipc_perm *isp, int access)
{
struct smack_known *ssp = smack_of_sem(sma);
struct smack_known *ssp = smack_of_ipc(isp);
struct smk_audit_info ad;
int rc;
#ifdef CONFIG_AUDIT
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_IPC);
ad.a.u.ipc_id = sma->id;
ad.a.u.ipc_id = isp->id;
#endif
rc = smk_curacc(ssp, access, &ad);
rc = smk_bu_current("sem", ssp, access, rc);
@ -3134,27 +3092,27 @@ static int smk_curacc_sem(struct kern_ipc_perm *sma, int access)
/**
* smack_sem_associate - Smack access check for sem
* @sma: the object
* @isp: the object
* @semflg: access requested
*
* Returns 0 if current has the requested access, error code otherwise
*/
static int smack_sem_associate(struct kern_ipc_perm *sma, int semflg)
static int smack_sem_associate(struct kern_ipc_perm *isp, int semflg)
{
int may;
may = smack_flags_to_may(semflg);
return smk_curacc_sem(sma, may);
return smk_curacc_sem(isp, may);
}
/**
* smack_sem_shmctl - Smack access check for sem
* @sma: the object
* @isp: the object
* @cmd: what it wants to do
*
* Returns 0 if current has the requested access, error code otherwise
*/
static int smack_sem_semctl(struct kern_ipc_perm *sma, int cmd)
static int smack_sem_semctl(struct kern_ipc_perm *isp, int cmd)
{
int may;
@ -3184,12 +3142,12 @@ static int smack_sem_semctl(struct kern_ipc_perm *sma, int cmd)
return -EINVAL;
}
return smk_curacc_sem(sma, may);
return smk_curacc_sem(isp, may);
}
/**
* smack_sem_semop - Smack checks of semaphore operations
* @sma: the object
* @isp: the object
* @sops: unused
* @nsops: unused
* @alter: unused
@ -3198,67 +3156,28 @@ static int smack_sem_semctl(struct kern_ipc_perm *sma, int cmd)
*
* Returns 0 if access is allowed, error code otherwise
*/
static int smack_sem_semop(struct kern_ipc_perm *sma, struct sembuf *sops,
static int smack_sem_semop(struct kern_ipc_perm *isp, struct sembuf *sops,
unsigned nsops, int alter)
{
return smk_curacc_sem(sma, MAY_READWRITE);
}
/**
* smack_msg_alloc_security - Set the security blob for msg
* @msq: the object
*
* Returns 0
*/
static int smack_msg_queue_alloc_security(struct kern_ipc_perm *msq)
{
struct kern_ipc_perm *kisp = msq;
struct smack_known *skp = smk_of_current();
kisp->security = skp;
return 0;
}
/**
* smack_msg_free_security - Clear the security blob for msg
* @msq: the object
*
* Clears the blob pointer
*/
static void smack_msg_queue_free_security(struct kern_ipc_perm *msq)
{
struct kern_ipc_perm *kisp = msq;
kisp->security = NULL;
}
/**
* smack_of_msq - the smack pointer for the msq
* @msq: the object
*
* Returns a pointer to the smack label entry
*/
static struct smack_known *smack_of_msq(struct kern_ipc_perm *msq)
{
return (struct smack_known *)msq->security;
return smk_curacc_sem(isp, MAY_READWRITE);
}
/**
* smk_curacc_msq : helper to check if current has access on msq
* @msq : the msq
* @isp : the msq
* @access : access requested
*
* return 0 if current has access, error otherwise
*/
static int smk_curacc_msq(struct kern_ipc_perm *msq, int access)
static int smk_curacc_msq(struct kern_ipc_perm *isp, int access)
{
struct smack_known *msp = smack_of_msq(msq);
struct smack_known *msp = smack_of_ipc(isp);
struct smk_audit_info ad;
int rc;
#ifdef CONFIG_AUDIT
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_IPC);
ad.a.u.ipc_id = msq->id;
ad.a.u.ipc_id = isp->id;
#endif
rc = smk_curacc(msp, access, &ad);
rc = smk_bu_current("msq", msp, access, rc);
@ -3267,27 +3186,27 @@ static int smk_curacc_msq(struct kern_ipc_perm *msq, int access)
/**
* smack_msg_queue_associate - Smack access check for msg_queue
* @msq: the object
* @isp: the object
* @msqflg: access requested
*
* Returns 0 if current has the requested access, error code otherwise
*/
static int smack_msg_queue_associate(struct kern_ipc_perm *msq, int msqflg)
static int smack_msg_queue_associate(struct kern_ipc_perm *isp, int msqflg)
{
int may;
may = smack_flags_to_may(msqflg);
return smk_curacc_msq(msq, may);
return smk_curacc_msq(isp, may);
}
/**
* smack_msg_queue_msgctl - Smack access check for msg_queue
* @msq: the object
* @isp: the object
* @cmd: what it wants to do
*
* Returns 0 if current has the requested access, error code otherwise
*/
static int smack_msg_queue_msgctl(struct kern_ipc_perm *msq, int cmd)
static int smack_msg_queue_msgctl(struct kern_ipc_perm *isp, int cmd)
{
int may;
@ -3310,29 +3229,29 @@ static int smack_msg_queue_msgctl(struct kern_ipc_perm *msq, int cmd)
return -EINVAL;
}
return smk_curacc_msq(msq, may);
return smk_curacc_msq(isp, may);
}
/**
* smack_msg_queue_msgsnd - Smack access check for msg_queue
* @msq: the object
* @isp: the object
* @msg: unused
* @msqflg: access requested
*
* Returns 0 if current has the requested access, error code otherwise
*/
static int smack_msg_queue_msgsnd(struct kern_ipc_perm *msq, struct msg_msg *msg,
static int smack_msg_queue_msgsnd(struct kern_ipc_perm *isp, struct msg_msg *msg,
int msqflg)
{
int may;
may = smack_flags_to_may(msqflg);
return smk_curacc_msq(msq, may);
return smk_curacc_msq(isp, may);
}
/**
* smack_msg_queue_msgsnd - Smack access check for msg_queue
* @msq: the object
* @isp: the object
* @msg: unused
* @target: unused
* @type: unused
@ -3340,10 +3259,10 @@ static int smack_msg_queue_msgsnd(struct kern_ipc_perm *msq, struct msg_msg *msg
*
* Returns 0 if current has read and write access, error code otherwise
*/
static int smack_msg_queue_msgrcv(struct kern_ipc_perm *msq, struct msg_msg *msg,
static int smack_msg_queue_msgrcv(struct kern_ipc_perm *isp, struct msg_msg *msg,
struct task_struct *target, long type, int mode)
{
return smk_curacc_msq(msq, MAY_READWRITE);
return smk_curacc_msq(isp, MAY_READWRITE);
}
/**
@ -4756,21 +4675,21 @@ static struct security_hook_list smack_hooks[] __lsm_ro_after_init = {
LSM_HOOK_INIT(msg_msg_alloc_security, smack_msg_msg_alloc_security),
LSM_HOOK_INIT(msg_msg_free_security, smack_msg_msg_free_security),
LSM_HOOK_INIT(msg_queue_alloc_security, smack_msg_queue_alloc_security),
LSM_HOOK_INIT(msg_queue_free_security, smack_msg_queue_free_security),
LSM_HOOK_INIT(msg_queue_alloc_security, smack_ipc_alloc_security),
LSM_HOOK_INIT(msg_queue_free_security, smack_ipc_free_security),
LSM_HOOK_INIT(msg_queue_associate, smack_msg_queue_associate),
LSM_HOOK_INIT(msg_queue_msgctl, smack_msg_queue_msgctl),
LSM_HOOK_INIT(msg_queue_msgsnd, smack_msg_queue_msgsnd),
LSM_HOOK_INIT(msg_queue_msgrcv, smack_msg_queue_msgrcv),
LSM_HOOK_INIT(shm_alloc_security, smack_shm_alloc_security),
LSM_HOOK_INIT(shm_free_security, smack_shm_free_security),
LSM_HOOK_INIT(shm_alloc_security, smack_ipc_alloc_security),
LSM_HOOK_INIT(shm_free_security, smack_ipc_free_security),
LSM_HOOK_INIT(shm_associate, smack_shm_associate),
LSM_HOOK_INIT(shm_shmctl, smack_shm_shmctl),
LSM_HOOK_INIT(shm_shmat, smack_shm_shmat),
LSM_HOOK_INIT(sem_alloc_security, smack_sem_alloc_security),
LSM_HOOK_INIT(sem_free_security, smack_sem_free_security),
LSM_HOOK_INIT(sem_alloc_security, smack_ipc_alloc_security),
LSM_HOOK_INIT(sem_free_security, smack_ipc_free_security),
LSM_HOOK_INIT(sem_associate, smack_sem_associate),
LSM_HOOK_INIT(sem_semctl, smack_sem_semctl),
LSM_HOOK_INIT(sem_semop, smack_sem_semop),