diff --git a/fs/nfs/nfs42proc.c b/fs/nfs/nfs42proc.c
index 93f4d8257525..da94bf2afd07 100644
--- a/fs/nfs/nfs42proc.c
+++ b/fs/nfs/nfs42proc.c
@@ -1077,6 +1077,9 @@ static int _nfs42_proc_clone(struct rpc_message *msg, struct file *src_f,
 	status = nfs4_call_sync(server->client, server, msg,
 				&args.seq_args, &res.seq_res, 0);
 	if (status == 0) {
+		/* a zero-length count means clone to EOF in src */
+		if (count == 0 && res.dst_fattr->valid & NFS_ATTR_FATTR_SIZE)
+			count = nfs_size_to_loff_t(res.dst_fattr->size) - dst_offset;
 		nfs42_copy_dest_done(dst_inode, dst_offset, count);
 		status = nfs_post_op_update_inode(dst_inode, res.dst_fattr);
 	}