From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 840BEC10F14 for ; Thu, 3 Oct 2019 16:01:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 51390207FF for ; Thu, 3 Oct 2019 16:01:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570118489; bh=mSLDmx+iybjyvDtPw8sV0QEKfRQ/7mwleZH38IGkP24=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=mN2vO1ghGi8C51Ob4PgSeq05BkXWmKfxwxu5sfsaiBMwwZ9DrfJsB1mnCZMl+nIS2 3MiU424IdAkZeqzExTW8lSRj2S9OKhe0H2jQ4VseYlaXuWmBSvgu2rxKMBcIMInY1o G4uufor3ategAO9MkPIH6lrp+rLu1oHd4anWtKGo= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730357AbfJCQB3 (ORCPT ); Thu, 3 Oct 2019 12:01:29 -0400 Received: from mail.kernel.org ([198.145.29.99]:45692 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730951AbfJCQB0 (ORCPT ); Thu, 3 Oct 2019 12:01:26 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id CBEDE21848; Thu, 3 Oct 2019 16:01:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570118485; bh=mSLDmx+iybjyvDtPw8sV0QEKfRQ/7mwleZH38IGkP24=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=H1zf5+7CfGSEWlC+jDLGyusJQ8aXOZRW2MWkc5QJAUpFp/v6TwMMp3knhjnHD47Qf Bf5Wk8gs/IxFxWD8HhkkW0UXJM7vf48ahNbMsLWDc8Bu8aylVRxkGFFeE7JdcodCiv IWvKvSIjiNqd3FQ65YNXxUCnialrWAYfqWmPuPEQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Bjorn Andersson , Jakub Kicinski Subject: [PATCH 4.9 027/129] net: qrtr: Stop rx_worker before freeing node Date: Thu, 3 Oct 2019 17:52:30 +0200 Message-Id: <20191003154331.480674156@linuxfoundation.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191003154318.081116689@linuxfoundation.org> References: <20191003154318.081116689@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Bjorn Andersson [ 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 --- net/qrtr/qrtr.c | 1 + 1 file changed, 1 insertion(+) --- a/net/qrtr/qrtr.c +++ b/net/qrtr/qrtr.c @@ -126,6 +126,7 @@ static void __qrtr_node_release(struct k list_del(&node->item); mutex_unlock(&qrtr_node_lock); + cancel_work_sync(&node->work); skb_queue_purge(&node->rx_queue); kfree(node); }