Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752475Ab3FEHDg (ORCPT ); Wed, 5 Jun 2013 03:03:36 -0400 Received: from lgeamrelo01.lge.com ([156.147.1.125]:47653 "EHLO LGEAMRELO01.lge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751959Ab3FEHDY (ORCPT ); Wed, 5 Jun 2013 03:03:24 -0400 X-AuditID: 9c93017d-b7c30ae0000063eb-ee-51aee2ba4eab Date: Wed, 5 Jun 2013 16:03:22 +0900 From: Minchan Kim To: Jiang Liu Cc: Greg Kroah-Hartman , Nitin Gupta , Jerome Marchand , Yijing Wang , Jiang Liu , devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2 08/10] zram: protect sysfs handler from invalid memory access Message-ID: <20130605070322.GH8732@blaptop> References: <1370361968-8764-1-git-send-email-jiang.liu@huawei.com> <1370361968-8764-8-git-send-email-jiang.liu@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1370361968-8764-8-git-send-email-jiang.liu@huawei.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-Brightmail-Tracker: AAAAAA== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 780 Lines: 25 On Wed, Jun 05, 2013 at 12:06:06AM +0800, Jiang Liu wrote: > Use zram->init_lock to protect access to zram->meta, otherwise it > may cause invalid memory access if zram->meta has been freed by > zram_reset_device(). > > This issue may be triggered by: > Thread 1: > while true; do cat mem_used_total; done > Thread 2: > while true; do echo 8M > disksize; echo 1 > reset; done > > Signed-off-by: Jiang Liu > Cc: stable@vger.kernel.org Acked-by: Minchan Kim -- Kind regards, Minchan Kim -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/