msg/security: Pass kern_ipc_perm not msg_queue into the msg_queue security hooks
All of the implementations of security hooks that take msg_queue only access q_perm the struct kern_ipc_perm member. This means the dependencies of the msg_queue security hooks can be simplified by passing the kern_ipc_perm member of msg_queue. Making this change will allow struct msg_queue to become private to ipc/msg.c. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman
Родитель
7191adff2a
Коммит
d8c6e85432
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@ -1575,13 +1575,13 @@ union security_list_options {
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int (*msg_msg_alloc_security)(struct msg_msg *msg);
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void (*msg_msg_free_security)(struct msg_msg *msg);
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int (*msg_queue_alloc_security)(struct msg_queue *msq);
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void (*msg_queue_free_security)(struct msg_queue *msq);
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int (*msg_queue_associate)(struct msg_queue *msq, int msqflg);
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int (*msg_queue_msgctl)(struct msg_queue *msq, int cmd);
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int (*msg_queue_msgsnd)(struct msg_queue *msq, struct msg_msg *msg,
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int (*msg_queue_alloc_security)(struct kern_ipc_perm *msq);
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void (*msg_queue_free_security)(struct kern_ipc_perm *msq);
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int (*msg_queue_associate)(struct kern_ipc_perm *msq, int msqflg);
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int (*msg_queue_msgctl)(struct kern_ipc_perm *msq, int cmd);
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int (*msg_queue_msgsnd)(struct kern_ipc_perm *msq, struct msg_msg *msg,
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int msqflg);
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int (*msg_queue_msgrcv)(struct msg_queue *msq, struct msg_msg *msg,
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int (*msg_queue_msgrcv)(struct kern_ipc_perm *msq, struct msg_msg *msg,
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struct task_struct *target, long type,
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int mode);
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@ -50,7 +50,6 @@ struct iattr;
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struct fown_struct;
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struct file_operations;
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struct msg_msg;
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struct msg_queue;
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struct xattr;
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struct xfrm_sec_ctx;
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struct mm_struct;
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@ -353,13 +352,13 @@ int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag);
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void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid);
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int security_msg_msg_alloc(struct msg_msg *msg);
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void security_msg_msg_free(struct msg_msg *msg);
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int security_msg_queue_alloc(struct msg_queue *msq);
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void security_msg_queue_free(struct msg_queue *msq);
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int security_msg_queue_associate(struct msg_queue *msq, int msqflg);
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int security_msg_queue_msgctl(struct msg_queue *msq, int cmd);
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int security_msg_queue_msgsnd(struct msg_queue *msq,
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int security_msg_queue_alloc(struct kern_ipc_perm *msq);
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void security_msg_queue_free(struct kern_ipc_perm *msq);
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int security_msg_queue_associate(struct kern_ipc_perm *msq, int msqflg);
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int security_msg_queue_msgctl(struct kern_ipc_perm *msq, int cmd);
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int security_msg_queue_msgsnd(struct kern_ipc_perm *msq,
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struct msg_msg *msg, int msqflg);
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int security_msg_queue_msgrcv(struct msg_queue *msq, struct msg_msg *msg,
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int security_msg_queue_msgrcv(struct kern_ipc_perm *msq, struct msg_msg *msg,
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struct task_struct *target, long type, int mode);
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int security_shm_alloc(struct kern_ipc_perm *shp);
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void security_shm_free(struct kern_ipc_perm *shp);
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@ -1043,32 +1042,32 @@ static inline int security_msg_msg_alloc(struct msg_msg *msg)
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static inline void security_msg_msg_free(struct msg_msg *msg)
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{ }
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static inline int security_msg_queue_alloc(struct msg_queue *msq)
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static inline int security_msg_queue_alloc(struct kern_ipc_perm *msq)
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{
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return 0;
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}
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static inline void security_msg_queue_free(struct msg_queue *msq)
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static inline void security_msg_queue_free(struct kern_ipc_perm *msq)
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{ }
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static inline int security_msg_queue_associate(struct msg_queue *msq,
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static inline int security_msg_queue_associate(struct kern_ipc_perm *msq,
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int msqflg)
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{
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return 0;
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}
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static inline int security_msg_queue_msgctl(struct msg_queue *msq, int cmd)
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static inline int security_msg_queue_msgctl(struct kern_ipc_perm *msq, int cmd)
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{
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return 0;
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}
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static inline int security_msg_queue_msgsnd(struct msg_queue *msq,
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static inline int security_msg_queue_msgsnd(struct kern_ipc_perm *msq,
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struct msg_msg *msg, int msqflg)
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{
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return 0;
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}
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static inline int security_msg_queue_msgrcv(struct msg_queue *msq,
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static inline int security_msg_queue_msgrcv(struct kern_ipc_perm *msq,
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struct msg_msg *msg,
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struct task_struct *target,
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long type, int mode)
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18
ipc/msg.c
18
ipc/msg.c
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@ -101,7 +101,7 @@ static void msg_rcu_free(struct rcu_head *head)
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struct kern_ipc_perm *p = container_of(head, struct kern_ipc_perm, rcu);
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struct msg_queue *msq = container_of(p, struct msg_queue, q_perm);
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security_msg_queue_free(msq);
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security_msg_queue_free(&msq->q_perm);
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kvfree(msq);
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}
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@ -127,7 +127,7 @@ static int newque(struct ipc_namespace *ns, struct ipc_params *params)
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msq->q_perm.key = key;
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msq->q_perm.security = NULL;
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retval = security_msg_queue_alloc(msq);
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retval = security_msg_queue_alloc(&msq->q_perm);
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if (retval) {
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kvfree(msq);
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return retval;
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@ -258,9 +258,7 @@ static void freeque(struct ipc_namespace *ns, struct kern_ipc_perm *ipcp)
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*/
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static inline int msg_security(struct kern_ipc_perm *ipcp, int msgflg)
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{
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struct msg_queue *msq = container_of(ipcp, struct msg_queue, q_perm);
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return security_msg_queue_associate(msq, msgflg);
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return security_msg_queue_associate(ipcp, msgflg);
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}
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SYSCALL_DEFINE2(msgget, key_t, key, int, msgflg)
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@ -380,7 +378,7 @@ static int msgctl_down(struct ipc_namespace *ns, int msqid, int cmd,
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msq = container_of(ipcp, struct msg_queue, q_perm);
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err = security_msg_queue_msgctl(msq, cmd);
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err = security_msg_queue_msgctl(&msq->q_perm, cmd);
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if (err)
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goto out_unlock1;
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@ -502,7 +500,7 @@ static int msgctl_stat(struct ipc_namespace *ns, int msqid,
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if (ipcperms(ns, &msq->q_perm, S_IRUGO))
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goto out_unlock;
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err = security_msg_queue_msgctl(msq, cmd);
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err = security_msg_queue_msgctl(&msq->q_perm, cmd);
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if (err)
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goto out_unlock;
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@ -718,7 +716,7 @@ static inline int pipelined_send(struct msg_queue *msq, struct msg_msg *msg,
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list_for_each_entry_safe(msr, t, &msq->q_receivers, r_list) {
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if (testmsg(msg, msr->r_msgtype, msr->r_mode) &&
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!security_msg_queue_msgrcv(msq, msg, msr->r_tsk,
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!security_msg_queue_msgrcv(&msq->q_perm, msg, msr->r_tsk,
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msr->r_msgtype, msr->r_mode)) {
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list_del(&msr->r_list);
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@ -784,7 +782,7 @@ static long do_msgsnd(int msqid, long mtype, void __user *mtext,
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goto out_unlock0;
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}
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err = security_msg_queue_msgsnd(msq, msg, msgflg);
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err = security_msg_queue_msgsnd(&msq->q_perm, msg, msgflg);
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if (err)
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goto out_unlock0;
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@ -960,7 +958,7 @@ static struct msg_msg *find_msg(struct msg_queue *msq, long *msgtyp, int mode)
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list_for_each_entry(msg, &msq->q_messages, m_list) {
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if (testmsg(msg, *msgtyp, mode) &&
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!security_msg_queue_msgrcv(msq, msg, current,
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!security_msg_queue_msgrcv(&msq->q_perm, msg, current,
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*msgtyp, mode)) {
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if (mode == SEARCH_LESSEQUAL && msg->m_type != 1) {
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*msgtyp = msg->m_type - 1;
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@ -1163,33 +1163,33 @@ void security_msg_msg_free(struct msg_msg *msg)
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call_void_hook(msg_msg_free_security, msg);
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}
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int security_msg_queue_alloc(struct msg_queue *msq)
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int security_msg_queue_alloc(struct kern_ipc_perm *msq)
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{
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return call_int_hook(msg_queue_alloc_security, 0, msq);
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}
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void security_msg_queue_free(struct msg_queue *msq)
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void security_msg_queue_free(struct kern_ipc_perm *msq)
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{
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call_void_hook(msg_queue_free_security, msq);
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}
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int security_msg_queue_associate(struct msg_queue *msq, int msqflg)
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int security_msg_queue_associate(struct kern_ipc_perm *msq, int msqflg)
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{
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return call_int_hook(msg_queue_associate, 0, msq, msqflg);
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}
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int security_msg_queue_msgctl(struct msg_queue *msq, int cmd)
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int security_msg_queue_msgctl(struct kern_ipc_perm *msq, int cmd)
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{
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return call_int_hook(msg_queue_msgctl, 0, msq, cmd);
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}
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int security_msg_queue_msgsnd(struct msg_queue *msq,
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int security_msg_queue_msgsnd(struct kern_ipc_perm *msq,
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struct msg_msg *msg, int msqflg)
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{
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return call_int_hook(msg_queue_msgsnd, 0, msq, msg, msqflg);
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}
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int security_msg_queue_msgrcv(struct msg_queue *msq, struct msg_msg *msg,
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int security_msg_queue_msgrcv(struct kern_ipc_perm *msq, struct msg_msg *msg,
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struct task_struct *target, long type, int mode)
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{
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return call_int_hook(msg_queue_msgrcv, 0, msq, msg, target, type, mode);
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@ -5532,52 +5532,52 @@ static void selinux_msg_msg_free_security(struct msg_msg *msg)
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}
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/* message queue security operations */
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static int selinux_msg_queue_alloc_security(struct msg_queue *msq)
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static int selinux_msg_queue_alloc_security(struct kern_ipc_perm *msq)
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{
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struct ipc_security_struct *isec;
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struct common_audit_data ad;
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u32 sid = current_sid();
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int rc;
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rc = ipc_alloc_security(&msq->q_perm, SECCLASS_MSGQ);
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rc = ipc_alloc_security(msq, SECCLASS_MSGQ);
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if (rc)
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return rc;
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isec = msq->q_perm.security;
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isec = msq->security;
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ad.type = LSM_AUDIT_DATA_IPC;
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ad.u.ipc_id = msq->q_perm.key;
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ad.u.ipc_id = msq->key;
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rc = avc_has_perm(sid, isec->sid, SECCLASS_MSGQ,
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MSGQ__CREATE, &ad);
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if (rc) {
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ipc_free_security(&msq->q_perm);
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ipc_free_security(msq);
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return rc;
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}
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return 0;
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}
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static void selinux_msg_queue_free_security(struct msg_queue *msq)
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static void selinux_msg_queue_free_security(struct kern_ipc_perm *msq)
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{
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ipc_free_security(&msq->q_perm);
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ipc_free_security(msq);
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}
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static int selinux_msg_queue_associate(struct msg_queue *msq, int msqflg)
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static int selinux_msg_queue_associate(struct kern_ipc_perm *msq, int msqflg)
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{
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struct ipc_security_struct *isec;
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struct common_audit_data ad;
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u32 sid = current_sid();
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isec = msq->q_perm.security;
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isec = msq->security;
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ad.type = LSM_AUDIT_DATA_IPC;
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ad.u.ipc_id = msq->q_perm.key;
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ad.u.ipc_id = msq->key;
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return avc_has_perm(sid, isec->sid, SECCLASS_MSGQ,
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MSGQ__ASSOCIATE, &ad);
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}
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static int selinux_msg_queue_msgctl(struct msg_queue *msq, int cmd)
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static int selinux_msg_queue_msgctl(struct kern_ipc_perm *msq, int cmd)
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{
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int err;
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int perms;
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@ -5602,11 +5602,11 @@ static int selinux_msg_queue_msgctl(struct msg_queue *msq, int cmd)
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return 0;
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}
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err = ipc_has_perm(&msq->q_perm, perms);
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err = ipc_has_perm(msq, perms);
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return err;
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}
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static int selinux_msg_queue_msgsnd(struct msg_queue *msq, struct msg_msg *msg, int msqflg)
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static int selinux_msg_queue_msgsnd(struct kern_ipc_perm *msq, struct msg_msg *msg, int msqflg)
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{
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struct ipc_security_struct *isec;
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struct msg_security_struct *msec;
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@ -5614,7 +5614,7 @@ static int selinux_msg_queue_msgsnd(struct msg_queue *msq, struct msg_msg *msg,
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u32 sid = current_sid();
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int rc;
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isec = msq->q_perm.security;
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isec = msq->security;
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msec = msg->security;
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/*
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@ -5632,7 +5632,7 @@ static int selinux_msg_queue_msgsnd(struct msg_queue *msq, struct msg_msg *msg,
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}
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ad.type = LSM_AUDIT_DATA_IPC;
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ad.u.ipc_id = msq->q_perm.key;
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ad.u.ipc_id = msq->key;
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/* Can this process write to the queue? */
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rc = avc_has_perm(sid, isec->sid, SECCLASS_MSGQ,
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@ -5649,7 +5649,7 @@ static int selinux_msg_queue_msgsnd(struct msg_queue *msq, struct msg_msg *msg,
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return rc;
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}
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static int selinux_msg_queue_msgrcv(struct msg_queue *msq, struct msg_msg *msg,
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static int selinux_msg_queue_msgrcv(struct kern_ipc_perm *msq, struct msg_msg *msg,
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struct task_struct *target,
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long type, int mode)
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{
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@ -5659,11 +5659,11 @@ static int selinux_msg_queue_msgrcv(struct msg_queue *msq, struct msg_msg *msg,
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u32 sid = task_sid(target);
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int rc;
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isec = msq->q_perm.security;
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isec = msq->security;
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msec = msg->security;
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ad.type = LSM_AUDIT_DATA_IPC;
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ad.u.ipc_id = msq->q_perm.key;
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ad.u.ipc_id = msq->key;
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rc = avc_has_perm(sid, isec->sid,
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SECCLASS_MSGQ, MSGQ__READ, &ad);
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|
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@ -3210,9 +3210,9 @@ static int smack_sem_semop(struct kern_ipc_perm *sma, struct sembuf *sops,
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*
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* Returns 0
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*/
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static int smack_msg_queue_alloc_security(struct msg_queue *msq)
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static int smack_msg_queue_alloc_security(struct kern_ipc_perm *msq)
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{
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struct kern_ipc_perm *kisp = &msq->q_perm;
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struct kern_ipc_perm *kisp = msq;
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struct smack_known *skp = smk_of_current();
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kisp->security = skp;
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@ -3225,9 +3225,9 @@ static int smack_msg_queue_alloc_security(struct msg_queue *msq)
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*
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* Clears the blob pointer
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*/
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static void smack_msg_queue_free_security(struct msg_queue *msq)
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static void smack_msg_queue_free_security(struct kern_ipc_perm *msq)
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{
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struct kern_ipc_perm *kisp = &msq->q_perm;
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struct kern_ipc_perm *kisp = msq;
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kisp->security = NULL;
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}
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@ -3238,9 +3238,9 @@ static void smack_msg_queue_free_security(struct msg_queue *msq)
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*
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* Returns a pointer to the smack label entry
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*/
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static struct smack_known *smack_of_msq(struct msg_queue *msq)
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static struct smack_known *smack_of_msq(struct kern_ipc_perm *msq)
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{
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return (struct smack_known *)msq->q_perm.security;
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return (struct smack_known *)msq->security;
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}
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|
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/**
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|
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@ -3250,7 +3250,7 @@ static struct smack_known *smack_of_msq(struct msg_queue *msq)
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*
|
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* return 0 if current has access, error otherwise
|
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*/
|
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static int smk_curacc_msq(struct msg_queue *msq, int access)
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static int smk_curacc_msq(struct kern_ipc_perm *msq, int access)
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{
|
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struct smack_known *msp = smack_of_msq(msq);
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struct smk_audit_info ad;
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|
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@ -3258,7 +3258,7 @@ static int smk_curacc_msq(struct msg_queue *msq, int access)
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#ifdef CONFIG_AUDIT
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smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_IPC);
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ad.a.u.ipc_id = msq->q_perm.id;
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ad.a.u.ipc_id = msq->id;
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#endif
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rc = smk_curacc(msp, access, &ad);
|
||||
rc = smk_bu_current("msq", msp, access, rc);
|
||||
|
|
@ -3272,7 +3272,7 @@ static int smk_curacc_msq(struct msg_queue *msq, int access)
|
|||
*
|
||||
* Returns 0 if current has the requested access, error code otherwise
|
||||
*/
|
||||
static int smack_msg_queue_associate(struct msg_queue *msq, int msqflg)
|
||||
static int smack_msg_queue_associate(struct kern_ipc_perm *msq, int msqflg)
|
||||
{
|
||||
int may;
|
||||
|
||||
|
|
@ -3287,7 +3287,7 @@ static int smack_msg_queue_associate(struct msg_queue *msq, int msqflg)
|
|||
*
|
||||
* Returns 0 if current has the requested access, error code otherwise
|
||||
*/
|
||||
static int smack_msg_queue_msgctl(struct msg_queue *msq, int cmd)
|
||||
static int smack_msg_queue_msgctl(struct kern_ipc_perm *msq, int cmd)
|
||||
{
|
||||
int may;
|
||||
|
||||
|
|
@ -3321,7 +3321,7 @@ static int smack_msg_queue_msgctl(struct msg_queue *msq, int cmd)
|
|||
*
|
||||
* Returns 0 if current has the requested access, error code otherwise
|
||||
*/
|
||||
static int smack_msg_queue_msgsnd(struct msg_queue *msq, struct msg_msg *msg,
|
||||
static int smack_msg_queue_msgsnd(struct kern_ipc_perm *msq, struct msg_msg *msg,
|
||||
int msqflg)
|
||||
{
|
||||
int may;
|
||||
|
|
@ -3340,7 +3340,7 @@ static int smack_msg_queue_msgsnd(struct msg_queue *msq, struct msg_msg *msg,
|
|||
*
|
||||
* Returns 0 if current has read and write access, error code otherwise
|
||||
*/
|
||||
static int smack_msg_queue_msgrcv(struct msg_queue *msq, struct msg_msg *msg,
|
||||
static int smack_msg_queue_msgrcv(struct kern_ipc_perm *msq, struct msg_msg *msg,
|
||||
struct task_struct *target, long type, int mode)
|
||||
{
|
||||
return smk_curacc_msq(msq, MAY_READWRITE);
|
||||
|
|
|
|||
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Ссылка в новой задаче