From 673bce11cedde3cc33c154d2b8e2d41139dcef72 Mon Sep 17 00:00:00 2001
From: Dmitry Chagin <dchagin@FreeBSD.org>
Date: Mon, 11 Apr 2022 23:33:27 +0300
Subject: [PATCH] linux(4): Copyout actual size of addr to the user space in
 accept().

Differential Revision:	https://reviews.freebsd.org/D34727
---
 sys/compat/linux/linux_socket.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/sys/compat/linux/linux_socket.c b/sys/compat/linux/linux_socket.c
index 622e25651db..d7e17596fde 100644
--- a/sys/compat/linux/linux_socket.c
+++ b/sys/compat/linux/linux_socket.c
@@ -1046,11 +1046,9 @@ linux_accept_common(struct thread *td, int s, l_uintptr_t addr,
 
 	if (len != 0) {
 		error = linux_copyout_sockaddr(sa, PTRIN(addr), len);
-
-		/*
-		 * XXX: We should also copyout the len, shouldn't we?
-		 */
-
+		if (error == 0)
+			error = copyout(&len, PTRIN(namelen),
+			    sizeof(len));
 		if (error != 0) {
 			fdclose(td, fp, td->td_retval[0]);
 			td->td_retval[0] = 0;