From 58403f841526600ab8a899b0a3265d368a9209bd Mon Sep 17 00:00:00 2001
From: He Sun <bochang.sh@antfin.com>
Date: Thu, 23 Apr 2020 20:23:20 +0800
Subject: [PATCH] Fix panic when dropping unix socket

When a unix socket only calls function listen, its object is not created
but its status becomes listening. At this time closing the socket would
cause a panic before this commit.
---
 src/libos/src/net/unix_socket.rs | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/libos/src/net/unix_socket.rs b/src/libos/src/net/unix_socket.rs
index 45421793..5fc2808e 100644
--- a/src/libos/src/net/unix_socket.rs
+++ b/src/libos/src/net/unix_socket.rs
@@ -286,8 +286,10 @@ impl UnixSocket {
 impl Drop for UnixSocket {
     fn drop(&mut self) {
         if let Status::Listening = self.status {
-            let path = &self.obj.as_ref().unwrap().path;
-            UnixSocketObject::remove(path);
+            // Only remove the object when there is one
+            if let Some(obj) = self.obj.as_ref() {
+                UnixSocketObject::remove(&obj.path);
+            }
         }
     }
 }