kern/111766: "panic: ffs_blkfree: freeing free block" during disk activity

[Kris Kennaway]

The following reply was made to PR kern/111766; it has been noted by GNATS.

From: Kris Kennaway <kris at obsecurity.org>
To: Alex Mogilnikov <alx at alx2.intellectronika.ru>
Cc: FreeBSD-gnats-submit at FreeBSD.org
Subject: Re: kern/111766: "panic: ffs_blkfree: freeing free block" during disk activity
Date: Tue, 17 Apr 2007 20:49:13 -0400

 On Tue, Apr 17, 2007 at 01:07:09PM -0000, Alex Mogilnikov wrote:
 > 
 > >Number:         111766
 > >Category:       kern
 > >Synopsis:       "panic: ffs_blkfree: freeing free block" during disk activity
 > >Confidential:   no
 > >Severity:       serious
 > >Priority:       medium
 > >Responsible:    freebsd-bugs
 > >State:          open
 > >Quarter:        
 > >Keywords:       
 > >Date-Required:
 > >Class:          sw-bug
 > >Submitter-Id:   current-users
 > >Arrival-Date:   Tue Apr 17 13:40:01 GMT 2007
 > >Closed-Date:
 > >Last-Modified:
 > >Originator:     Alex Mogilnikov
 > >Release:        FreeBSD 6.2-RELEASE-p3 i386
 > >Organization:
 > >Environment:
 > System: FreeBSD alx2.intellectronika.ru 6.2-RELEASE-p3 FreeBSD 6.2-RELEASE-p3 #3: Tue Apr 3 03:12:35 YEKST 2007 alx at alx2.intellectronika.ru:/usr/obj/usr/src/sys/MYKERNEL i386
 > 
 > MB: ASUS A8N-VM
 > HDD: Seagate ST320014A 3.07
 > 
 > >Description:
 > panic: ffs_blkfree: freeing free block during heavy disk activity
 > (while converting large video files, doing filesystem dump, etc.)
 > 
 > This appears after 6.1-R -> 6.2-RC2 upgrade (with the same hardware).
 
 In my experience this often is associated to a failing drive.  Also
 make sure you don't have lingering filesystem corruption (fsck -fy
 from single-user mode).
 
 kris