X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=ipc%2Fmsg.c;h=cd92d342953e500717557a475f09dca9535c6c1a;hb=8ab6f3f706f5cb91bc0793afc95c8809837ece05;hp=60c1e5c23418116326fdd36bd05c5b65cd93643c;hpb=53846a21c1766326bb14ce8ab6e997a0c120675d;p=linux-2.6

diff --git a/ipc/msg.c b/ipc/msg.c
index 60c1e5c234..cd92d34295 100644
--- a/ipc/msg.c
+++ b/ipc/msg.c
@@ -13,10 +13,12 @@
  * mostly rewritten, threaded and wake-one semantics added
  * MSGMAX limit removed, sysctl's added
  * (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/spinlock.h>
@@ -28,6 +30,8 @@
 #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"
@@ -179,8 +183,8 @@ static void expunge_all(struct msg_queue* msq, int res)
  * 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)
 {
@@ -208,7 +212,7 @@ asmlinkage long sys_msgget (key_t key, int msgflg)
 	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 */
@@ -231,7 +235,7 @@ asmlinkage long sys_msgget (key_t key, int msgflg)
 		}
 		msg_unlock(msq);
 	}
-	up(&msg_ids.sem);
+	mutex_unlock(&msg_ids.mutex);
 	return ret;
 }
 
@@ -361,7 +365,7 @@ asmlinkage long sys_msgctl (int msqid, int cmd, struct msqid_ds __user *buf)
 		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);
@@ -372,7 +376,7 @@ asmlinkage long sys_msgctl (int msqid, int cmd, struct msqid_ds __user *buf)
 			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;
@@ -428,8 +432,6 @@ asmlinkage long sys_msgctl (int msqid, int cmd, struct msqid_ds __user *buf)
 			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;
@@ -437,7 +439,7 @@ asmlinkage long sys_msgctl (int msqid, int cmd, struct msqid_ds __user *buf)
 		return  -EINVAL;
 	}
 
-	down(&msg_ids.sem);
+	mutex_lock(&msg_ids.mutex);
 	msq = msg_lock(msqid);
 	err=-EINVAL;
 	if (msq == NULL)
@@ -447,6 +449,16 @@ asmlinkage long sys_msgctl (int msqid, int cmd, struct msqid_ds __user *buf)
 	if (msg_checkid(msq,msqid))
 		goto out_unlock_up;
 	ipcp = &msq->q_perm;
+
+	err = audit_ipc_obj(ipcp);
+	if (err)
+		goto out_unlock_up;
+	if (cmd==IPC_SET) {
+		err = audit_ipc_set_perm(setbuf.qbytes, setbuf.uid, setbuf.gid, setbuf.mode);
+		if (err)
+			goto out_unlock_up;
+	}
+
 	err = -EPERM;
 	if (current->euid != ipcp->cuid && 
 	    current->euid != ipcp->uid && !capable(CAP_SYS_ADMIN))
@@ -488,7 +500,7 @@ asmlinkage long sys_msgctl (int msqid, int cmd, struct msqid_ds __user *buf)
 	}
 	err = 0;
 out_up:
-	up(&msg_ids.sem);
+	mutex_unlock(&msg_ids.mutex);
 	return err;
 out_unlock_up:
 	msg_unlock(msq);