[PATCH v1] chardev/char-socket: fix double free of err after socket is disconnected

[Derek Su]

The err is freed in check_report_connect_error() conditionally,
calling error_free() directly may lead to a double-free bug.

Signed-off-by: Derek Su <dereksu@qnap.com>
---
 chardev/char-socket.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/chardev/char-socket.c b/chardev/char-socket.c
index afebeec5c3..a009bed5ee 100644
--- a/chardev/char-socket.c
+++ b/chardev/char-socket.c
@@ -1086,7 +1086,11 @@ static void qemu_chr_socket_connected(QIOTask *task, 
void *opaque)
     if (qio_task_propagate_error(task, &err)) {
         tcp_chr_change_state(s, TCP_CHARDEV_STATE_DISCONNECTED);
         check_report_connect_error(chr, err);
-        error_free(err);
+
+        if (!s->connect_err_reported) {
+            error_free(err);
+        }
+
         goto cleanup;
     }
 
-- 
2.17.1