X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=ipc%2Fmqueue.c;h=1511714a95851dc8af01ee2421907c5b0d23725c;hb=20ca73bc792be9625af184cbec36e1372611d1c3;hp=4e776f9c80e7c1fbe0da01a1dcdc9f63c04ebd89;hpb=bf785ee0aeea7a3e717cb1e11df4135b6cbde7da;p=karo-tx-linux.git

diff --git a/ipc/mqueue.c b/ipc/mqueue.c
index 4e776f9c80e7..1511714a9585 100644
--- a/ipc/mqueue.c
+++ b/ipc/mqueue.c
@@ -8,6 +8,8 @@
  * Lockless receive & send, fd based notify:
  * 			    Manfred Spraul	    (manfred@colorfullife.com)
  *
+ * Audit:                   George Wilson           (ltcgcw@us.ibm.com)
+ *
  * This file is released under the GPL.
  */
 
@@ -24,7 +26,10 @@
 #include <linux/skbuff.h>
 #include <linux/netlink.h>
 #include <linux/syscalls.h>
+#include <linux/audit.h>
 #include <linux/signal.h>
+#include <linux/mutex.h>
+
 #include <net/sock.h>
 #include "util.h"
 
@@ -51,7 +56,6 @@
 #define HARD_MSGMAX 	(131072/sizeof(void*))
 #define DFLT_MSGSIZEMAX 8192	/* max message size */
 
-#define NOTIFY_COOKIE_LEN	32
 
 struct ext_wait_queue {		/* queue of sleeping tasks */
 	struct task_struct *task;
@@ -599,15 +603,16 @@ static int mq_attr_ok(struct mq_attr *attr)
 static struct file *do_create(struct dentry *dir, struct dentry *dentry,
 			int oflag, mode_t mode, struct mq_attr __user *u_attr)
 {
-	struct file *filp;
 	struct mq_attr attr;
 	int ret;
 
-	if (u_attr != NULL) {
+	if (u_attr) {
+		ret = -EFAULT;
 		if (copy_from_user(&attr, u_attr, sizeof(attr)))
-			return ERR_PTR(-EFAULT);
+			goto out;
+		ret = -EINVAL;
 		if (!mq_attr_ok(&attr))
-			return ERR_PTR(-EINVAL);
+			goto out;
 		/* store for use during create */
 		dentry->d_fsdata = &attr;
 	}
@@ -616,13 +621,14 @@ static struct file *do_create(struct dentry *dir, struct dentry *dentry,
 	ret = vfs_create(dir->d_inode, dentry, mode, NULL);
 	dentry->d_fsdata = NULL;
 	if (ret)
-		return ERR_PTR(ret);
+		goto out;
 
-	filp = dentry_open(dentry, mqueue_mnt, oflag);
-	if (!IS_ERR(filp))
-		dget(dentry);
+	return dentry_open(dentry, mqueue_mnt, oflag);
 
-	return filp;
+out:
+	dput(dentry);
+	mntput(mqueue_mnt);
+	return ERR_PTR(ret);
 }
 
 /* Opens existing queue */
@@ -630,20 +636,20 @@ static struct file *do_open(struct dentry *dentry, int oflag)
 {
 static int oflag2acc[O_ACCMODE] = { MAY_READ, MAY_WRITE,
 					MAY_READ | MAY_WRITE };
-	struct file *filp;
 
-	if ((oflag & O_ACCMODE) == (O_RDWR | O_WRONLY))
+	if ((oflag & O_ACCMODE) == (O_RDWR | O_WRONLY)) {
+		dput(dentry);
+		mntput(mqueue_mnt);
 		return ERR_PTR(-EINVAL);
+	}
 
-	if (permission(dentry->d_inode, oflag2acc[oflag & O_ACCMODE], NULL))
+	if (permission(dentry->d_inode, oflag2acc[oflag & O_ACCMODE], NULL)) {
+		dput(dentry);
+		mntput(mqueue_mnt);
 		return ERR_PTR(-EACCES);
+	}
 
-	filp = dentry_open(dentry, mqueue_mnt, oflag);
-
-	if (!IS_ERR(filp))
-		dget(dentry);
-
-	return filp;
+	return dentry_open(dentry, mqueue_mnt, oflag);
 }
 
 asmlinkage long sys_mq_open(const char __user *u_name, int oflag, mode_t mode,
@@ -654,6 +660,10 @@ asmlinkage long sys_mq_open(const char __user *u_name, int oflag, mode_t mode,
 	char *name;
 	int fd, error;
 
+	error = audit_mq_open(oflag, mode, u_attr);
+	if (error != 0)
+		return error;
+
 	if (IS_ERR(name = getname(u_name)))
 		return PTR_ERR(name);
 
@@ -671,17 +681,20 @@ asmlinkage long sys_mq_open(const char __user *u_name, int oflag, mode_t mode,
 
 	if (oflag & O_CREAT) {
 		if (dentry->d_inode) {	/* entry already exists */
-			filp = (oflag & O_EXCL) ? ERR_PTR(-EEXIST) :
-					do_open(dentry, oflag);
+			error = -EEXIST;
+			if (oflag & O_EXCL)
+				goto out;
+			filp = do_open(dentry, oflag);
 		} else {
 			filp = do_create(mqueue_mnt->mnt_root, dentry,
 						oflag, mode, u_attr);
 		}
-	} else
-		filp = (dentry->d_inode) ? do_open(dentry, oflag) :
-					ERR_PTR(-ENOENT);
-
-	dput(dentry);
+	} else {
+		error = -ENOENT;
+		if (!dentry->d_inode)
+			goto out;
+		filp = do_open(dentry, oflag);
+	}
 
 	if (IS_ERR(filp)) {
 		error = PTR_ERR(filp);
@@ -692,8 +705,10 @@ asmlinkage long sys_mq_open(const char __user *u_name, int oflag, mode_t mode,
 	fd_install(fd, filp);
 	goto out_upsem;
 
-out_putfd:
+out:
+	dput(dentry);
 	mntput(mqueue_mnt);
+out_putfd:
 	put_unused_fd(fd);
 out_err:
 	fd = error;
@@ -754,7 +769,7 @@ out_unlock:
  * The receiver accepts the message and returns without grabbing the queue
  * spinlock. Therefore an intermediate STATE_PENDING state and memory barriers
  * are necessary. The same algorithm is used for sysv semaphores, see
- * ipc/sem.c fore more details.
+ * ipc/sem.c for more details.
  *
  * The same algorithm is used for senders.
  */
@@ -806,6 +821,10 @@ asmlinkage long sys_mq_timedsend(mqd_t mqdes, const char __user *u_msg_ptr,
 	long timeout;
 	int ret;
 
+	ret = audit_mq_timedsend(mqdes, msg_len, msg_prio, u_abs_timeout);
+	if (ret != 0)
+		return ret;
+
 	if (unlikely(msg_prio >= (unsigned long) MQ_PRIO_MAX))
 		return -EINVAL;
 
@@ -888,6 +907,10 @@ asmlinkage ssize_t sys_mq_timedreceive(mqd_t mqdes, char __user *u_msg_ptr,
 	struct mqueue_inode_info *info;
 	struct ext_wait_queue wait;
 
+	ret = audit_mq_timedreceive(mqdes, msg_len, u_msg_prio, u_abs_timeout);
+	if (ret != 0)
+		return ret;
+
 	timeout = prepare_timeout(u_abs_timeout);
 
 	ret = -EBADF;
@@ -967,6 +990,10 @@ asmlinkage long sys_mq_notify(mqd_t mqdes,
 	struct mqueue_inode_info *info;
 	struct sk_buff *nc;
 
+	ret = audit_mq_notify(mqdes, u_notification);
+	if (ret != 0)
+		return ret;
+
 	nc = NULL;
 	sock = NULL;
 	if (u_notification != NULL) {
@@ -1011,7 +1038,8 @@ retry:
 				goto out;
 			}
 
-			ret = netlink_attachskb(sock, nc, 0, MAX_SCHEDULE_TIMEOUT);
+			ret = netlink_attachskb(sock, nc, 0,
+					MAX_SCHEDULE_TIMEOUT, NULL);
 			if (ret == 1)
 		       		goto retry;
 			if (ret) {
@@ -1106,6 +1134,9 @@ asmlinkage long sys_mq_getsetattr(mqd_t mqdes,
 	omqstat = info->attr;
 	omqstat.mq_flags = filp->f_flags & O_NONBLOCK;
 	if (u_mqstat) {
+		ret = audit_mq_getsetattr(mqdes, &mqstat);
+		if (ret != 0)
+			goto out;
 		if (mqstat.mq_flags & O_NONBLOCK)
 			filp->f_flags |= O_NONBLOCK;
 		else