Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759013AbbLBSch (ORCPT ); Wed, 2 Dec 2015 13:32:37 -0500 Received: from mail-wm0-f47.google.com ([74.125.82.47]:36120 "EHLO mail-wm0-f47.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752465AbbLBScg (ORCPT ); Wed, 2 Dec 2015 13:32:36 -0500 MIME-Version: 1.0 In-Reply-To: <20151202171320.GE8918@ret.masoncoding.com> References: <20151202145907.GA9425@codemonkey.org.uk> <565F0A20.40200@fb.com> <20151202160942.GA16348@codemonkey.org.uk> <20151202171320.GE8918@ret.masoncoding.com> Date: Wed, 2 Dec 2015 21:32:34 +0300 Message-ID: Subject: Re: 4.4rc3 nfsd/btrfs kasan warning. From: Andrey Ryabinin To: Chris Mason , Dave Jones , Josef Bacik , Linux Kernel , "J. Bruce Fields" , Jeff Layton , David Sterba , conchur@web.de Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1232 Lines: 31 2015-12-02 20:14 GMT+03:00 Chris Mason : > On Wed, Dec 02, 2015 at 11:09:43AM -0500, Dave Jones wrote: >> On Wed, Dec 02, 2015 at 10:11:28AM -0500, Josef Bacik wrote: >> > On 12/02/2015 09:59 AM, Dave Jones wrote: >> > > Got a few of these in the logs this morning after an overnight rsync over nfs >> > > to an exported btrfs volume. >> > >> > That's probably us and not NFS, what line is that in >> > setup_cluster_bitmap? Thanks, >> >> If my math is correct, it's this.. >> >> if (entry->offset != bitmap_offset) >> >> I don't seem to be able to trigger it on demand unfortunatly. > > Is it possible we're blowing the stack? It seems pretty tricky to get a > stack out of bounds out of this code without flat out blowing through > it. > I think it just empty bitmaps list. list_first_entry() can't be used on empty list. BTW, there is similar report http://lkml.kernel.org/r/ -- 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/