vfs: Don't let __fdget_pos() get FMODE_PATH files

[~andy/linux] / fs / file.c

diff --git a/fs/file.c b/fs/file.c
index 60a45e9f53231379c87b9ee75cb64eb8d6d71979..eb56a13dab3ed5561a9521b2b2d1a6000a7158a3 100644 (file)
--- a/fs/file.c
+++ b/fs/file.c
@@ -713,27 +713,16 @@ unsigned long __fdget_raw(unsigned int fd)
 
 unsigned long __fdget_pos(unsigned int fd)
 {
-       struct files_struct *files = current->files;
-       struct file *file;
-       unsigned long v;
-
-       if (atomic_read(&files->count) == 1) {
-               file = __fcheck_files(files, fd);
-               v = 0;
-       } else {
-               file = __fget(fd, 0);
-               v = FDPUT_FPUT;
-       }
-       if (!file)
-               return 0;
+       unsigned long v = __fdget(fd);
+       struct file *file = (struct file *)(v & ~3);
 
-       if (file->f_mode & FMODE_ATOMIC_POS) {
+       if (file && (file->f_mode & FMODE_ATOMIC_POS)) {
                if (file_count(file) > 1) {
                        v |= FDPUT_POS_UNLOCK;
                        mutex_lock(&file->f_pos_lock);
                }
        }
-       return v | (unsigned long)file;
+       return v;
 }
 
 /*