[Crash-utility] crash: invalid kernel virtual address: 0 type: "memory section"

Hello, I have a couple dumps generated on Ubuntu Trusty LTS (3.13.0-39-generic kernel) which crash fails on. $ ./crash ../ddeb/usr/lib/debug/boot/vmlinux-3.13.0-39-generic ../dump.201412280256 crash 7.0.9 Copyright (C) 2002-2014 Red Hat, Inc. Copyright (C) 2004, 2005, 2006, 2010 IBM Corporation Copyright (C) 1999-2006 Hewlett-Packard Co Copyright (C) 2005, 2006, 2011, 2012 Fujitsu Limited Copyright (C) 2006, 2007 VA Linux Systems Japan K.K. Copyright (C) 2005, 2011 NEC Corporation Copyright (C) 1999, 2002, 2007 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. GNU gdb (GDB) 7.6 Copyright (C) 2013 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-unknown-linux-gnu"... crash: cannot determine thread return address please wait... (gathering kmem slab cache data) crash: invalid kernel virtual address: 1c type: "kmem_cache objsize/object_size" crash: failed to read pageflag_names entry please wait... (gathering module symbol data) WARNING: invalid kernel module size: 0 crash: cannot determine idle task addresses from init_tasks[] or runqueues[] crash: cannot resolve "init_task_union" vmlinux-3.13.0-39-generic was extracted from Ubuntu ddeb: $ file ../ddeb/usr/lib/debug/boot/vmlinux-3.13.0-39-generic ../ddeb/usr/lib/debug/boot/vmlinux-3.13.0-39-generic: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), statically linked, BuildID[sha1]=c4fa631d2cc34a0b2628a5de01a04e81a0667555, not stripped With -d8 I get: ... <read_diskdump: addr: ffffffffffffffff paddr: 7fffffff cnt: 1> read_diskdump: paddr/pfn: 7fffffff/7ffff -> cache physical page: 7ffff000 crash: invalid kernel virtual address: 0 type: "memory section" The entire -d8 output is attached. Bogus "base kernel version" stands out immediately and I'm pretty sure I've seen "0.0.0" in there a couple times with exactly the same dump. against kt->utsname.release being all zeroes. Eddy Gonzalo (CC'ed) can probably provide access to the dumps if needed. Thanks, Ilya