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Message #151981
[Bug 1523606] Re: Incompatibility with 4.2 prints: crash: page excluded: kernel virtual address: ffff88105b1a0000 type: "fill_task_struct"
Hello Dave, or anyone else affected,
Accepted crash into trusty-proposed. The package will build now and be
available at https://launchpad.net/ubuntu/+source/crash/7.0.3-3ubuntu4.4
in a few hours, and then in the -proposed repository.
Please help us by testing this new package. See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to
enable and use -proposed. Your feedback will aid us getting this update
out to other Ubuntu users.
If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, and change the tag
from verification-needed to verification-done. If it does not fix the
bug for you, please add a comment stating that, and change the tag to
verification-failed. In either case, details of your testing will help
us make a better decision.
Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in
advance!
** Changed in: crash (Ubuntu Trusty)
Status: In Progress => Fix Committed
** Tags added: verification-needed
** Changed in: crash (Ubuntu Vivid)
Status: In Progress => Fix Committed
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https://bugs.launchpad.net/bugs/1523606
Title:
Incompatibility with 4.2 prints: crash: page excluded: kernel virtual
address: ffff88105b1a0000 type: "fill_task_struct"
Status in crash package in Ubuntu:
Fix Released
Status in crash source package in Trusty:
Fix Committed
Status in crash source package in Vivid:
Fix Committed
Status in crash source package in Wily:
Fix Committed
Status in crash source package in Xenial:
Fix Released
Bug description:
[Impact]
* Crash prints
"crash: page excluded: kernel virtual address: ffff8808595a0000 type: "fill_task_struct" "
on dumps for 4.2 and newer levels of the kernel.
* This is related to variable task_struct_size being variable on 4.2 and newer kernels.
[Test Case]
An example of the issue.
$ crash ddeb/usr/lib/debug/boot/vmlinux-4.2.0-18-generic 00092116-dump.201511300126
crash 7.0.3
Copyright (C) 2002-2013 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"...
please wait... (gathering task table data)
crash: page excluded: kernel virtual address: ffff88105b1a0000 type: "fill_task_struct"
crash: page excluded: kernel virtual address: ffff881052fa8000 type:
"fill_task_struct"
crash: page excluded: kernel virtual address: ffff880111770000 type:
"fill_task_struct"
crash: page excluded: kernel virtual address: ffff880836578000 type:
"fill_task_struct"
crash: page excluded: kernel virtual address: ffff880859e68000 type:
"fill_task_struct"
crash: page excluded: kernel virtual address: ffff88085b858000 type:
"fill_task_struct"
crash: page excluded: kernel virtual address: ffff88084c448000 type:
"fill_task_struct"
crash: page excluded: kernel virtual address: ffff88105b530000 type:
"fill_task_struct"
crash: page excluded: kernel virtual address: ffff8808595a0000 type:
"fill_task_struct"
crash: page excluded: kernel virtual address: ffff8801065a0000 type:
"fill_task_struct"
crash: page excluded: kernel virtual address: ffff8808488d0000 type:
"fill_task_struct"
crash: page excluded: kernel virtual address: ffff880859dd0000 type:
"fill_task_struct"
crash: page excluded: kernel virtual address: ffff880855750000 type:
"fill_task_struct"
crash: page excluded: kernel virtual address: ffff881058cd0000 type:
"fill_task_struct"
crash: page excluded: kernel virtual address: ffff880bb5150000 type: "fill_task_struct"
KERNEL: ddeb/usr/lib/debug/boot/vmlinux-4.2.0-18-generic
DUMPFILE: 00092116-dump.201511300126 [PARTIAL DUMP]
CPUS: 24
DATE: Thu Jan 1 00:00:00 1970
UPTIME: 3 days, 13:28:22
LOAD AVERAGE: 528.67, 526.12, 465.03
TASKS: 1208
NODENAME: <redacted>
RELEASE: 4.2.0-18-generic
VERSION: #22~14.04.1-Ubuntu SMP Fri Nov 6 22:20:11 UTC 2015
MACHINE: x86_64 (2397 Mhz)
MEMORY: 63.9 GB
PANIC: "Kernel panic - not syncing: NMI IOCK error: Not continuing"
PID: 0
COMMAND: "swapper/0"
TASK: ffffffff81c14500 (1 of 24) [THREAD_INFO: ffffffff81c00000]
CPU: 0
STATE: TASK_RUNNING (PANIC)
[Regression Potential]
* Change is available in upstream crash
* This has been tested with both 3.13 and 4.2 crash dumps.
[Other Info]
* https://github.com/crash-utility/crash/commit/80b49a879e0ba8ce7c365a2fd88693128a79310f
is the fix for this issue.
* Related conversation on mailing list.
https://www.redhat.com/archives/crash-utility/2015-November/msg00022.html
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References