[Crash-utility] crash can't read vmlinux on live system?

[Kris Corwin]

> First, is the vmlinuz that the kernel is running created from the ./vmlinux
> file that you're using as an argument?

yes.

> I'm guessing that it continued on and complained
> about not being able to read the the linux_banner string, and then died?

crash exited right after what I posted.

I can run crash on 2.6.9-11 kernels, but not 2.6.9-22.

Here's the -d run.  It looks like I have a memory read issue.

[root at f14 linux-2.6.9-22.0.2.EL]# crash -d7 ./vmlinux
                                                                                                                
crash 4.0-2
Copyright (C) 2002, 2003, 2004, 2005  Red Hat, Inc.
Copyright (C) 2004, 2005  IBM Corporation
Copyright (C) 1999-2005  Hewlett-Packard Co
Copyright (C) 1999, 2002  Silicon Graphics, Inc.
Copyright (C) 1999, 2000, 2001, 2002  Mission Critical Linux, Inc.
This program 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.  Enter "help copying" to see the conditions.
This program has absolutely no warranty.  Enter "help warranty" for details.
                                                                                                                
get_live_memory_source: /dev/mem
/proc/version:
Linux version 2.6.9-prep.qp2.2.5.11.3qsnet (root at f15) (gcc version 3.2.3 20030502 (Red Hat Linux 3.2.3-20)) #3 SMP Tue Feb 21 15:12:39 EST 2006
./vmlinux:
Linux version 2.6.9-prep.qp2.2.5.11.3qsnet (root at f15) (gcc version 3.2.3 20030502 (Red Hat Linux 3.2.3-20)) #3 SMP Tue Feb 21 15:12:39 EST 2006
<readmem: c0153373, KVADDR, "x86_omit_frame_pointer", 4, (ROE), bff71420>
/dev/mem: Operation not permitted
crash: read(/dev/mem, 153373, 0): 4 (ffffffff)
crash: read error: kernel virtual address: c0153373  type: "x86_omit_frame_pointer"
<readmem: c0439d10, KVADDR, "xtime", 8, (FOE), 8349634>
/dev/mem: Operation not permitted
crash: read(/dev/mem, 439d10, 0): 8 (ffffffff)
crash: read error: kernel virtual address: c0439d10  type: "xtime"
[root at f14 linux-2.6.9-22.0.2.EL]# whoami
root
[root at f14 linux-2.6.9-22.0.2.EL]# ls -l /dev/mem
crw-r-----  1 root kmem 1, 1 Feb 22 06:31 /dev/mem