From a2471c154b72c0d154e881379fd1ab79e80b9c70 Mon Sep 17 00:00:00 2001
From: Claude Jordan <45038457+cljord@users.noreply.github.com>
Date: Mon, 31 May 2021 23:35:19 +0200
Subject: [PATCH] Add check_open(sock) to _sockname (#41000)

Not checking could lead to a segfault on closed TCPSockets in getpeername

Fixes #40993

(cherry picked from commit 28e30a395318da5892e73c0e7b4ad6dbb0a14199)
---
 stdlib/Sockets/src/Sockets.jl | 1 +
 1 file changed, 1 insertion(+)

diff --git a/stdlib/Sockets/src/Sockets.jl b/stdlib/Sockets/src/Sockets.jl
index 99dab5e61e01e4..1e5b90cdda3902 100644
--- a/stdlib/Sockets/src/Sockets.jl
+++ b/stdlib/Sockets/src/Sockets.jl
@@ -806,6 +806,7 @@ socket is connected to. Valid only for connected TCP sockets.
 getpeername(sock::TCPSocket) = _sockname(sock, false)
 
 function _sockname(sock, self=true)
+    sock.status == StatusInit || check_open(sock)
     rport = Ref{Cushort}(0)
     raddress = zeros(UInt8, 16)
     rfamily = Ref{Cuint}(0)