*
* mostly rewritten, threaded and wake-one semantics added
* MSGMAX limit removed, sysctl's added
- * (c) 1999 Manfred Spraul <manfreds@colorfullife.com>
+ * (c) 1999 Manfred Spraul <manfred@colorfullife.com>
+ *
+ * support for audit of ipc object properties and permission changes
+ * Dustin Kirkland <dustin.kirkland@us.ibm.com>
*/
+#include <linux/capability.h>
#include <linux/config.h>
#include <linux/slab.h>
#include <linux/msg.h>
#include <linux/syscalls.h>
#include <linux/audit.h>
#include <linux/seq_file.h>
+#include <linux/mutex.h>
+
#include <asm/current.h>
#include <asm/uaccess.h>
#include "util.h"
* removes the message queue from message queue ID
* array, and cleans up all the messages associated with this queue.
*
- * msg_ids.sem and the spinlock for this message queue is hold
- * before freeque() is called. msg_ids.sem remains locked on exit.
+ * msg_ids.mutex and the spinlock for this message queue is hold
+ * before freeque() is called. msg_ids.mutex remains locked on exit.
*/
static void freeque (struct msg_queue *msq, int id)
{
int id, ret = -EPERM;
struct msg_queue *msq;
- down(&msg_ids.sem);
+ mutex_lock(&msg_ids.mutex);
if (key == IPC_PRIVATE)
ret = newque(key, msgflg);
else if ((id = ipc_findkey(&msg_ids, key)) == -1) { /* key not used */
ret = -EEXIST;
} else {
msq = msg_lock(id);
- if(msq==NULL)
- BUG();
+ BUG_ON(msq==NULL);
if (ipcperms(&msq->q_perm, msgflg))
ret = -EACCES;
else {
}
msg_unlock(msq);
}
- up(&msg_ids.sem);
+ mutex_unlock(&msg_ids.mutex);
return ret;
}
msginfo.msgmnb = msg_ctlmnb;
msginfo.msgssz = MSGSSZ;
msginfo.msgseg = MSGSEG;
- down(&msg_ids.sem);
+ mutex_lock(&msg_ids.mutex);
if (cmd == MSG_INFO) {
msginfo.msgpool = msg_ids.in_use;
msginfo.msgmap = atomic_read(&msg_hdrs);
msginfo.msgtql = MSGTQL;
}
max_id = msg_ids.max_id;
- up(&msg_ids.sem);
+ mutex_unlock(&msg_ids.mutex);
if (copy_to_user (buf, &msginfo, sizeof(struct msginfo)))
return -EFAULT;
return (max_id < 0) ? 0: max_id;
return -EFAULT;
if (copy_msqid_from_user (&setbuf, buf, version))
return -EFAULT;
- if ((err = audit_ipc_perms(setbuf.qbytes, setbuf.uid, setbuf.gid, setbuf.mode)))
- return err;
break;
case IPC_RMID:
break;
return -EINVAL;
}
- down(&msg_ids.sem);
+ mutex_lock(&msg_ids.mutex);
msq = msg_lock(msqid);
err=-EINVAL;
if (msq == NULL)
if (msg_checkid(msq,msqid))
goto out_unlock_up;
ipcp = &msq->q_perm;
+
+ err = audit_ipc_obj(ipcp);
+ if (err)
+ goto out_unlock_up;
+
err = -EPERM;
if (current->euid != ipcp->cuid &&
current->euid != ipcp->uid && !capable(CAP_SYS_ADMIN))
switch (cmd) {
case IPC_SET:
{
+ err = audit_ipc_set_perm(setbuf.qbytes, setbuf.uid, setbuf.gid, setbuf.mode, ipcp);
+ if (err)
+ goto out_unlock_up;
+
err = -EPERM;
if (setbuf.qbytes > msg_ctlmnb && !capable(CAP_SYS_RESOURCE))
goto out_unlock_up;
}
err = 0;
out_up:
- up(&msg_ids.sem);
+ mutex_unlock(&msg_ids.mutex);
return err;
out_unlock_up:
msg_unlock(msq);