In qcs_free() we're calling a few other functions after releasing
qcs->sd. None of them make use of it for now but with traces that
will change. Make sure to clear qcs->sd after releasing it.
/* Release stream endpoint descriptor. */
BUG_ON(qcs->sd && !se_fl_test(qcs->sd, SE_FL_ORPHAN));
sedesc_free(qcs->sd);
+ qcs->sd = NULL;
/* Release app-layer context. */
if (qcs->ctx && qcc->app_ops->detach)