Received: by 2002:a25:8b91:0:0:0:0:0 with SMTP id j17csp6120125ybl; Sun, 22 Dec 2019 23:55:47 -0800 (PST) X-Google-Smtp-Source: APXvYqzNdU2ppeks2k6HQMO26vKYoy6mVsrwp4PQJ+etntvxhTxBOEIunC/rqFIVDHYSfpODvhM5 X-Received: by 2002:a9d:7d85:: with SMTP id j5mr14072232otn.86.1577087747492; Sun, 22 Dec 2019 23:55:47 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1577087747; cv=none; d=google.com; s=arc-20160816; b=gBLrzEJ3LmjtmnEhNeem9tWBuFzz5uH8Bv1w+Q1SBMdp4ypAoKwC91volBbxR3ehU+ 72X5OCNdH6/8gJ4Mw4Si0zsPgBMBSpRb2U1OqX2/7LhQPVhwEakatqrPFPYcWQKD8oaQ 4zkr0MS38XJrVwdya/fW46xoYrS22/IczvVhoLPP74cMjXE5YBLSy/aLxa1iHawugkVI SYr2wq38BpXiAiY2PaR3OVay2l56faeGt1LGVY24L81GMNqw0di2BAky9HPzObYEhJ5z s81F0H9AcZ9JMP5kemPbYoo4f/g5EH1GFNxDoXFWXxdk9WpB64fZxDnFjProkrOszi8/ xgSQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:in-reply-to:content-disposition :mime-version:references:message-id:subject:cc:to:from:date :dkim-signature; bh=IR1G2ZLqxAdrOFAFSoE1b7pFdftQavza12r5NzOWDNA=; b=pTMcizQMe2jAWm2AkSf/PJdFsYjKVKE3HQRSlq1/HzTiwIunZidSR2JZEELS5f7ZPU XnfBM0OrBeHA2LV3+1gyLU6RX86cwjufXXQH3/3SR+8ZVvYRnW1C/9Akjq8pAyc8gyaN /2NsDAPZaFzLZLcs/Crk3tHBbHtpcbYWBC7Ep2PXmAH8TWPwk1Fs+2+HDbHMHQE4cSA2 Qkb2y7oppVY5WYfhngJryPD73Cl927z1S8NI6ey4Oia6LEkXnZ5GaNU0e/VFVmLdPFPc dSS0JsdqzlghJ5MwOjokTyKkV0LTwUG/t+antSxFC1Sb1DBWwDSIPoZD7AmYLe9DWKEE Y3mw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=VUOyLSLH; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id 20si11859038otk.283.2019.12.22.23.55.36; Sun, 22 Dec 2019 23:55:47 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=VUOyLSLH; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726239AbfLWHy4 (ORCPT + 99 others); Mon, 23 Dec 2019 02:54:56 -0500 Received: from mail.kernel.org ([198.145.29.99]:58056 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725810AbfLWHyz (ORCPT ); Mon, 23 Dec 2019 02:54:55 -0500 Received: from localhost (unknown [223.226.34.186]) (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 9ECD0206B7; Mon, 23 Dec 2019 07:54:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1577087695; bh=2yh3uiTddvCjS7EKZmDMOjEsrl7nNSl2DDHRdpfkucM=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=VUOyLSLHEKQDCiquoEAkVHUJzNOQ1BRWseTRI2muai1LY0mcdWKIlB4yiEEVFT1y0 lxyEIc6wq+zY8iiNawNo1RTevyvujkMuWRVRugxr+OSL6g2/v+jiI81N8HtYzoKXWv IYbhaEvFmuMwhd+p5UDGX9XTOmPPnpqmCeUdP/Sk= Date: Mon, 23 Dec 2019 13:24:51 +0530 From: Vinod Koul To: Peter Ujfalusi Cc: "Ardelean, Alexandru" , "dan.j.williams@intel.com" , "dmaengine@vger.kernel.org" , "s.hauer@pengutronix.de" , "linux-kernel@vger.kernel.org" Subject: Re: [PATCH] dmaengine: virt-dma: Fix access after free in vcna_complete() Message-ID: <20191223075451.GE2536@vkoul-mobl> References: <20191220131100.21804-1-peter.ujfalusi@ti.com> <0303ceda023121d9048d2508e28c0306b1871561.camel@analog.com> <486093bc-b1bf-1727-0402-f07606fffd1e@ti.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <486093bc-b1bf-1727-0402-f07606fffd1e@ti.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 20-12-19, 16:50, Peter Ujfalusi wrote: > > > On 20/12/2019 16.01, Ardelean, Alexandru wrote: > > On Fri, 2019-12-20 at 15:11 +0200, Peter Ujfalusi wrote: > >> [External] > >> > >> vchan_vdesc_fini() is freeing up 'vd' so the access to vd->tx_result is > >> via already freed up memory. > >> > >> Move the vchan_vdesc_fini() after invoking the callback to avoid this. > >> > > > > Apologies for seeing this too late: typo in title vcna_complete() -> > > vchan_complete() > > Yep, I also noticed after sending it, I hope Vinod is kind enough and > fix it up when applying ;) In case it wasnt clear, yeah trivial changes while applying are no hassle :) -- ~Vinod