[PATCH 3/4] char-socket: avoid double call tcp_chr_free_connection

[Li Feng]

double call tcp_chr_free_connection generates a crash.

Signed-off-by: Li Feng <fen...@smartx.com>
---
 chardev/char-socket.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/chardev/char-socket.c b/chardev/char-socket.c
index 185fe38dda..43aab8f24b 100644
--- a/chardev/char-socket.c
+++ b/chardev/char-socket.c
@@ -476,6 +476,11 @@ static void tcp_chr_disconnect_locked(Chardev *chr)
     SocketChardev *s = SOCKET_CHARDEV(chr);
     bool emit_close = s->state == TCP_CHARDEV_STATE_CONNECTED;
 
+    /* avoid re-enter when socket read/write error and disconnect event. */
+    if (s->state == TCP_CHARDEV_STATE_DISCONNECTED) {
+        return;
+    }
+
     tcp_chr_free_connection(chr);
 
     if (s->listener) {
-- 
2.11.0


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