1 files changed, 6 insertions, 1 deletions

diff --git a/fs/fcntl.c b/fs/fcntl.c
index 9679fcbdeaa0..ce12a6885115 100644
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
@@ -139,8 +139,13 @@ asmlinkage long sys_dup3(unsigned int oldfd, unsigned int newfd, int flags)
         if (!(file = fcheck(oldfd)))
                 goto out_unlock;
         err = newfd;
-        if (newfd == oldfd)
+        if (unlikely(newfd == oldfd)) {
+                if (flags & O_CLOEXEC) {
+                        fdt = files_fdtable(files);
+                        FD_SET(newfd, fdt->close_on_exec);
+                }
                 goto out_unlock;
+        }
         err = -EBADF;
         if (newfd >= current->signal->rlim[RLIMIT_NOFILE].rlim_cur)
                 goto out_unlock;