On Thu, Oct 12, 2006 at 02:50:33PM -0700, Steven Truong wrote: Hi Steven, which vmlinux are you using for analysis? First kernel's vmlinux or second kernel's vmlinux. You should be using first kernel's vmlinux. crash is trying to read some symbols from the core file and crash thinks that virtual address for kernel_config_data is ffffffff8123d1e0. I think this is too high a address. I guess this will be the address if you compile your kernel for physical address 16MB. So my first guess is that you are using second kernel's vmlinux for analysis. Which kernel version and kexec-tools version are you using? I am also copying the mail to crash-utility mailing list where folks keep a watch on crash related issues. Thanks Vivek