switch mqueue syscalls to fget_light()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 14 insertions, 12 deletions

diff --git a/ipc/mqueue.c b/ipc/mqueue.c
index 9a08acc9e649..5db1b69500fd 100644
--- a/ipc/mqueue.c
+++ b/ipc/mqueue.c
@@ -953,7 +953,7 @@ SYSCALL_DEFINE5(mq_timedsend, mqd_t, mqdes, const char __user *, u_msg_ptr,
         ktime_t expires, *timeout = NULL;
         struct timespec ts;
         struct posix_msg_tree_node *new_leaf = NULL;
-        int ret = 0;
+        int ret = 0, fput_needed;
 
         if (u_abs_timeout) {
                 int res = prepare_timeout(u_abs_timeout, &expires, &ts);
@@ -967,7 +967,7 @@ SYSCALL_DEFINE5(mq_timedsend, mqd_t, mqdes, const char __user *, u_msg_ptr,
 
         audit_mq_sendrecv(mqdes, msg_len, msg_prio, timeout ? &ts : NULL);
 
-        filp = fget(mqdes);
+        filp = fget_light(mqdes, &fput_needed);
         if (unlikely(!filp)) {
                 ret = -EBADF;
                 goto out;
@@ -1056,7 +1056,7 @@ out_free:
         if (ret)
                 free_msg(msg_ptr);
 out_fput:
-        fput(filp);
+        fput_light(filp, fput_needed);
 out:
         return ret;
 }
@@ -1074,6 +1074,7 @@ SYSCALL_DEFINE5(mq_timedreceive, mqd_t, mqdes, char __user *, u_msg_ptr,
         ktime_t expires, *timeout = NULL;
         struct timespec ts;
         struct posix_msg_tree_node *new_leaf = NULL;
+        int fput_needed;
 
         if (u_abs_timeout) {
                 int res = prepare_timeout(u_abs_timeout, &expires, &ts);
@@ -1084,7 +1085,7 @@ SYSCALL_DEFINE5(mq_timedreceive, mqd_t, mqdes, char __user *, u_msg_ptr,
 
         audit_mq_sendrecv(mqdes, msg_len, 0, timeout ? &ts : NULL);
 
-        filp = fget(mqdes);
+        filp = fget_light(mqdes, &fput_needed);
         if (unlikely(!filp)) {
                 ret = -EBADF;
                 goto out;
@@ -1160,7 +1161,7 @@ SYSCALL_DEFINE5(mq_timedreceive, mqd_t, mqdes, char __user *, u_msg_ptr,
                 free_msg(msg_ptr);
         }
 out_fput:
-        fput(filp);
+        fput_light(filp, fput_needed);
 out:
         return ret;
 }
@@ -1173,7 +1174,7 @@ out:
 SYSCALL_DEFINE2(mq_notify, mqd_t, mqdes,
                 const struct sigevent __user *, u_notification)
 {
-        int ret;
+        int ret, fput_needed;
         struct file *filp;
         struct sock *sock;
         struct inode *inode;
@@ -1220,13 +1221,13 @@ SYSCALL_DEFINE2(mq_notify, mqd_t, mqdes,
                         skb_put(nc, NOTIFY_COOKIE_LEN);
                         /* and attach it to the socket */
 retry:
-                        filp = fget(notification.sigev_signo);
+                        filp = fget_light(notification.sigev_signo, &fput_needed);
                         if (!filp) {
                                 ret = -EBADF;
                                 goto out;
                         }
                         sock = netlink_getsockbyfilp(filp);
-                        fput(filp);
+                        fput_light(filp, fput_needed);
                         if (IS_ERR(sock)) {
                                 ret = PTR_ERR(sock);
                                 sock = NULL;
@@ -1245,7 +1246,7 @@ retry:
                 }
         }
 
-        filp = fget(mqdes);
+        filp = fget_light(mqdes, &fput_needed);
         if (!filp) {
                 ret = -EBADF;
                 goto out;
@@ -1292,7 +1293,7 @@ retry:
         }
         spin_unlock(&info->lock);
 out_fput:
-        fput(filp);
+        fput_light(filp, fput_needed);
 out:
         if (sock) {
                 netlink_detachskb(sock, nc);
@@ -1308,6 +1309,7 @@ SYSCALL_DEFINE3(mq_getsetattr, mqd_t, mqdes,
 {
         int ret;
         struct mq_attr mqstat, omqstat;
+        int fput_needed;
         struct file *filp;
         struct inode *inode;
         struct mqueue_inode_info *info;
@@ -1319,7 +1321,7 @@ SYSCALL_DEFINE3(mq_getsetattr, mqd_t, mqdes,
                         return -EINVAL;
         }
 
-        filp = fget(mqdes);
+        filp = fget_light(mqdes, &fput_needed);
         if (!filp) {
                 ret = -EBADF;
                 goto out;
@@ -1356,7 +1358,7 @@ SYSCALL_DEFINE3(mq_getsetattr, mqd_t, mqdes,
                 ret = -EFAULT;
 
 out_fput:
-        fput(filp);
+        fput_light(filp, fput_needed);
 out:
         return ret;
 }