From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-ID: <51B1AACD.7070403@redhat.com> Date: Fri, 07 Jun 2013 11:41:33 +0200 From: Jerome Marchand MIME-Version: 1.0 To: Jiang Liu CC: Greg Kroah-Hartman , Nitin Gupta , Minchan Kim , Jiang Liu , devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: Re: [PATCH v3 06/10] zram: protect sysfs handler from invalid memory access References: <1370534851-26056-1-git-send-email-jiang.liu@huawei.com> <1370534851-26056-7-git-send-email-jiang.liu@huawei.com> In-Reply-To: <1370534851-26056-7-git-send-email-jiang.liu@huawei.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: On 06/06/2013 06:07 PM, 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 > Acked-by: Minchan Kim > Cc: stable@vger.kernel.org Acked-by: Jerome Marchand