From 889ce9b964f329410c97e9fbe3204c87078d13d4 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
---
 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 65884bc190cace..6952aa9bd8a0fd 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)