Public bug reported:
Ubuntu version:
$ lsb_release -rd
Description: Ubuntu 17.10
Release: 17.10
Package version:
$ apt-cache policy crash
crash:
Installed: 7.1.9-1
Candidate: 7.1.9-1
Version table:
*** 7.1.9-1 500
500 http://cn.archive.ubuntu.com/ubuntu artful/main amd64 Packages
100 /var/lib/dpkg/status
The error:
$ sudo crash /usr/lib/debug/boot/vmlinux-4.13.0-17-generic
crash 7.1.9
Copyright (C) 2002-2016 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"...
WARNING: kernel relocated [654MB]: patching 95415 gdb minimal_symbol
values
crash: read error: kernel virtual address: ffffffffaac47710 type:
"page_offset_base"
crash: this kernel may be configured with CONFIG_STRICT_DEVMEM, which
renders /dev/mem unusable as a live memory source.
crash: trying /proc/kcore as an alternative to /dev/mem
crash: cannot resolve "init_level4_pgt"
Reported also in:
https://bugzilla.redhat.com/show_bug.cgi?id=1516954
Fixed in:
https://github.com/crash-utility/crash/commit/a16324a2f05c0947a83e26a5de7c756de4603da9#diff-2e50715241f69338dda2b8adf90db04a
How to fix:
Please upgrade the package to latest crash version (7.2.0).
** Affects: crash (Ubuntu)
Importance: Undecided
Status: New
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Packages, which is subscribed to crash in Ubuntu.
https://bugs.launchpad.net/bugs/1736425
Title:
crash: cannot resolve "init_level4_pgt
Status in crash package in Ubuntu:
New
Bug description:
Ubuntu version:
$ lsb_release -rd
Description: Ubuntu 17.10
Release: 17.10
Package version:
$ apt-cache policy crash
crash:
Installed: 7.1.9-1
Candidate: 7.1.9-1
Version table:
*** 7.1.9-1 500
500 http://cn.archive.ubuntu.com/ubuntu artful/main amd64 Packages
100 /var/lib/dpkg/status
The error:
$ sudo crash /usr/lib/debug/boot/vmlinux-4.13.0-17-generic
crash 7.1.9
Copyright (C) 2002-2016 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"...
WARNING: kernel relocated [654MB]: patching 95415 gdb minimal_symbol
values
crash: read error: kernel virtual address: ffffffffaac47710 type:
"page_offset_base"
crash: this kernel may be configured with CONFIG_STRICT_DEVMEM, which
renders /dev/mem unusable as a live memory source.
crash: trying /proc/kcore as an alternative to /dev/mem
crash: cannot resolve "init_level4_pgt"
Reported also in:
https://bugzilla.redhat.com/show_bug.cgi?id=1516954
Fixed in:
https://github.com/crash-utility/crash/commit/a16324a2f05c0947a83e26a5de7c756de4603da9#diff-2e50715241f69338dda2b8adf90db04a
How to fix:
Please upgrade the package to latest crash version (7.2.0).
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/crash/+bug/1736425/+subscriptions
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