These changes are a raw update to a vanilla kernel 4.1.10, with the

[kvmfornfv.git] / kernel / fs / cifs / ioctl.c

diff --git a/kernel/fs/cifs/ioctl.c b/kernel/fs/cifs/ioctl.c
index 8b7898b..64a9bca 100644 (file)
--- a/kernel/fs/cifs/ioctl.c
+++ b/kernel/fs/cifs/ioctl.c
@@ -67,6 +67,12 @@ static long cifs_ioctl_clone(unsigned int xid, struct file *dst_file,
                goto out_drop_write;
        }
 
+       if (src_file.file->f_op->unlocked_ioctl != cifs_ioctl) {
+               rc = -EBADF;
+               cifs_dbg(VFS, "src file seems to be from a different filesystem type\n");
+               goto out_fput;
+       }
+
        if ((!src_file.file->private_data) || (!dst_file->private_data)) {
                rc = -EBADF;
                cifs_dbg(VFS, "missing cifsFileInfo on copy range src file\n");