From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-io0-f172.google.com ([209.85.223.172]:32992 "EHLO mail-io0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932466AbcC2UqU (ORCPT ); Tue, 29 Mar 2016 16:46:20 -0400 Received: by mail-io0-f172.google.com with SMTP id a129so38940138ioe.0 for ; Tue, 29 Mar 2016 13:46:20 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: References: Date: Tue, 29 Mar 2016 14:46:19 -0600 Message-ID: Subject: Re: attempt to mount after crash during rebalance hard crashes server From: Chris Murphy To: "Warren, Daniel" Cc: Btrfs BTRFS Content-Type: text/plain; charset=UTF-8 Sender: linux-btrfs-owner@vger.kernel.org List-ID: On Tue, Mar 29, 2016 at 2:21 PM, Warren, Daniel wrote: > Greetings all, > > I'm running 4.4.0 from deb sid > > My server crashed during a balance after I had added 10 disks to the > original 15, I have not been able to bring the FS up since, it causes > a system crash > > btrfs fi sh looks fine, but when I mount , it crashes the server with > a NULL pointer dereference error > Each Disk in the set is LUKS encrypted > > btrfs fi sh http://pastebin.com/QLTqSU8L > kernel panic http://pastebin.com/aBF6XmzA Panic shows: CPU: 0 PID: 153 Comm: kworker/u8:13 Not tainted 3.16-2-amd64 #1 Debian 3.16.3-2 That's old. Are you sure you're running 4.4.0? > If it's of any use I can run tests before I attempt check --repair I suggest 4.4.5 or newer, and just try a regular mount first. The general sequence is: newer kernel regular mount, then -o recovery, then -o ro, recovery, and then btrfs check without --repair, and posting all of the messages from those attempts. -- Chris Murphy