From 73f0c11d11329a0d6d205d4312b6e5d2512af7c5 Mon Sep 17 00:00:00 2001 From: Bjorn Andersson Date: Wed, 18 Sep 2019 10:21:17 -0700 Subject: [PATCH] net: qrtr: Stop rx_worker before freeing node 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 --- net/qrtr/qrtr.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/qrtr/qrtr.c b/net/qrtr/qrtr.c index 6c8b0f6d28f9..88f98f27ad88 100644 --- a/net/qrtr/qrtr.c +++ b/net/qrtr/qrtr.c @@ -150,6 +150,7 @@ 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); } -- 2.34.1