From a7285698eec94644db32121ad806760188afe1fa Mon Sep 17 00:00:00 2001 From: Bjorn Andersson Date: Wed, 9 Oct 2019 10:27:26 +0800 Subject: [PATCH] net: qrtr: Stop rx_worker before freeing node [ Upstream commit 73f0c11d11329a0d6d205d4312b6e5d2512af7c5 ] As the endpoint is unregistered there might still be work pending to handle incoming messages, which will result in a use after free scenario. The plan is to remove the rx_worker, but until then (and for stable@) ensure that the work is stopped before the node is freed. Fixes: bdabad3e363d ("net: Add Qualcomm IPC router") Cc: stable@vger.kernel.org Signed-off-by: Bjorn Andersson Signed-off-by: Jakub Kicinski Signed-off-by: Greg Kroah-Hartman Signed-off-by: Yang Yingliang --- net/qrtr/qrtr.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/qrtr/qrtr.c b/net/qrtr/qrtr.c index 86e1e37eb4e8..5c75118539bb 100644 --- a/net/qrtr/qrtr.c +++ b/net/qrtr/qrtr.c @@ -157,6 +157,7 @@ static void __qrtr_node_release(struct kref *kref) list_del(&node->item); mutex_unlock(&qrtr_node_lock); + cancel_work_sync(&node->work); skb_queue_purge(&node->rx_queue); kfree(node); } -- GitLab