don't leak O_CLOEXEC into ->f_flags

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

fs/open.c

@@ -814,7 +814,7 @@ static inline int build_open_flags(int flags, umode_t mode, struct open_flags *o
 		op->mode = 0;
 
 	/* Must never be set by userspace */
-	flags &= ~FMODE_NONOTIFY;
+	flags &= ~FMODE_NONOTIFY & ~O_CLOEXEC;
 
 	/*
 	 * O_SYNC is implemented as __O_SYNC|O_DSYNC.  As many places only

fs/proc/fd.c

@@ -36,7 +36,7 @@ static int seq_show(struct seq_file *m, void *v)
 		if (file) {
 			struct fdtable *fdt = files_fdtable(files);
 
-			f_flags = file->f_flags & ~O_CLOEXEC;
+			f_flags = file->f_flags;
 			if (close_on_exec(fd, fdt))
 				f_flags |= O_CLOEXEC;