Re: panic: ffs_blkfree_cg: freeing free block

On Fri, Oct 28, 2011 at 4:34 PM, deeptech71_at_gmail.com
<deeptech71_at_gmail.com> wrote:
> With object files which were built using the original kernel
> configuration file (no debugging symbols included):
>
> #kgdb kernel /var/crash/vmcore.4
> GNU gdb 6.1.1 [FreeBSD]
> Copyright 2004 Free Software Foundation, Inc.
> GDB is free software, covered by the GNU General Public License, and you are
> welcome to change it and/or distribute copies of it under certain conditions.
> Type "show copying" to see the conditions.
> There is absolutely no warranty for GDB.  Type "show warranty" for details.
> This GDB was configured as "i386-marcel-freebsd"...(no debugging
> symbols found)...
> Attempt to extract a component of a value that is not a structure pointer.
> Attempt to extract a component of a value that is not a structure pointer.
> #0  0xc0687d88 in doadump ()
> (kgdb) bt
> #0  0xc0687d88 in doadump ()
> #1  0xc0688302 in kern_reboot ()
> #2  0xc0688768 in panic ()
> #3  0xc07f92bf in ffs_blkfree_cg ()
> #4  0xc07f9417 in ffs_blkfree ()
> #5  0xc0803259 in ffs_indirtrunc ()
> #6  0xc08042e1 in ffs_truncate ()
> #7  0xc083171c in ufs_inactive ()
> #8  0xc0712718 in vinactive ()
> #9  0xc0716e2a in vputx ()
> #10 0xc071affb in kern_unlinkat ()
> #11 0xc071b1a6 in kern_unlink ()
> #12 0xc071b1ca in sys_unlink ()
> #13 0xc089c954 in syscall ()
> #14 0xc0887021 in Xint0x80_syscall ()
> #15 0x00000033 in ?? ()
> Previous frame inner to this frame (corrupt stack?)
>
> wtf?
>
> With object files which were built using a kernel configuration file
> that had ``makeoptions DEBUG=-g'' inserted compared to the original
> configuration file:
>
> #kgdb kernel.debug /var/crash/vmcore.4
> GNU gdb 6.1.1 [FreeBSD]
> Copyright 2004 Free Software Foundation, Inc.
> GDB is free software, covered by the GNU General Public License, and you are
> welcome to change it and/or distribute copies of it under certain conditions.
> Type "show copying" to see the conditions.
> There is absolutely no warranty for GDB.  Type "show warranty" for details.
> This GDB was configured as "i386-marcel-freebsd"...
> Cannot access memory at address 0x0
> (kgdb) bt
> #0  0x00000000 in ?? ()
>
> wtf?

Something stomped on the stack. What was the previous version of
FreeBSD (major.minor.subminor, svn revision) at worked?
Thanks,
-Garrett