cancelled_cb() (which is triggered when the GCancellable's "cancelled"
signal is emitted) called spice_usb_acl_helper_close_acl(), which calls
spice_usb_acl_helper_cleanup(), which in turn calls
g_cancellable_disconnect(). Calling g_cancellable_disconnect() from
within a "cancelled" handler results in a dealock, as mentioned in the
documentation. Instead of closing the acl here, simply cancel the task
here. The cleanup() call will happen when the SpiceUsbAclHelper object
is destroyed.
---
 src/usb-acl-helper.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/usb-acl-helper.c b/src/usb-acl-helper.c
index 4ed57b9..9a08fea 100644
--- a/src/usb-acl-helper.c
+++ b/src/usb-acl-helper.c
@@ -162,7 +162,7 @@ static void cancelled_cb(GCancellable *cancellable, 
gpointer user_data)
 {
     SpiceUsbAclHelper *self = SPICE_USB_ACL_HELPER(user_data);
 
-    spice_usb_acl_helper_close_acl(self);
+    spice_usb_acl_helper_cancel(self);
 }
 
 static void helper_child_watch_cb(GPid pid, gint status, gpointer user_data)
-- 
2.4.3

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