Re: [PATCH v2 0/3] vhost_task: Fix a bug where KVM wakes an exited task

On 2025-08-27 12:41:04 [-0700], Sean Christopherson wrote:

quoted

Michael,

Sean,

would the bellow work by chance? It is a quick shot but it looks
symmetrical…

diff --git a/kernel/vhost_task.c b/kernel/vhost_task.c
index bc738fa90c1d6..27107dcc1cbfe 100644
--- a/kernel/vhost_task.c
+++ b/kernel/vhost_task.c

@@ -100,6 +100,7 @@ void vhost_task_stop(struct vhost_task *vtsk)
         * freeing it below.
         */
        wait_for_completion(&vtsk->exited);
+       put_task_struct(vtsk->task);
        kfree(vtsk);
 }
 EXPORT_SYMBOL_GPL(vhost_task_stop);

@@ -148,7 +149,7 @@ struct vhost_task *vhost_task_create(bool (*fn)(void *),
                return ERR_CAST(tsk);
        }

-       vtsk->task = tsk;
+       vtsk->task = get_task_struct(tsk);
        return vtsk;
 }
 EXPORT_SYMBOL_GPL(vhost_task_create);

Sebastian