From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@bugzilla.kernel.org Subject: [Bug 195561] Suspicious persistent EXT4-fs error: ext4_validate_block_bitmap:395: [Proc] bg 17: block 557056: invalid block bitmap Date: Mon, 24 Apr 2017 16:50:08 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT To: linux-ext4@kernel.org Return-path: Received: from mail.wl.linuxfoundation.org ([198.145.29.98]:44148 "EHLO mail.wl.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S974892AbdDXQuM (ORCPT ); Mon, 24 Apr 2017 12:50:12 -0400 Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6E30D28404 for ; Mon, 24 Apr 2017 16:50:11 +0000 (UTC) In-Reply-To: Sender: linux-ext4-owner@vger.kernel.org List-ID: https://bugzilla.kernel.org/show_bug.cgi?id=195561 Andreas Dilger (adilger.kernelbugzilla@dilger.ca) changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |adilger.kernelbugzilla@dilg | |er.ca --- Comment #7 from Andreas Dilger (adilger.kernelbugzilla@dilger.ca) --- Given that the same corruption is happening across different block devices, it points to something other than the block device going bad. It might be a bug in the ext4 code, or some other kernel code that is corrupting the memory (unlikely), or a userspace process that is clobbering this block. It would be worthwhile to save a copy of the corrupted bitmap block for further analysis. It may be possible to identify what is overwriting that block by looking at the content. Collect "dumpe2fs -h" output for the filesystem, so we can see what features are enabled. Collect "dd if=/dev/sda1 of=/tmp/block.dat bs=4k count=1 skip=557056" and then dump it via "od -Ax4 -tx4 -a /tmp/block.dat". You could also potentially add a tracepoint or run blktrace to see which processes are writing to this block. It should only be the jbd2 thread. -- You are receiving this mail because: You are watching the assignee of the bug.