| 2020-03-30 08:47:21 |
yamato |
bug |
|
|
added bug |
| 2020-03-30 08:52:35 |
yamato |
description |
Thank you for reading this report.
This may caused by bugs in kernel, not in kdump. If so, I will report this to kernel team.
I need your comment to solve this.
[Impact]
* Kdump kernel can't be loaded using linux kernel 4.15.0-76.
[Environment]
Description: Ubuntu 18.04.4 LTS
Release: 18.04
uname:
Linux ubuntu 4.15.0-76-generic #86-Ubuntu SMP Fri Jan 17 17:24:28 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
Secure boot is enabled.
[Test case]
1)After OS booted, run systemctl status kdump-tools shows these messages below:
....
● kdump-tools.service - Kernel crash dump capture service
Loaded: loaded (/lib/systemd/system/kdump-tools.service; enabled; vendor preset: enabled)
Active: active (exited) since Fri 2020-03-27 16:40:31 JST; 5min ago
Process: 895 ExecStart=/etc/init.d/kdump-tools start (code=exited, status=0/SUCCESS)
Main PID: 895 (code=exited, status=0/SUCCESS)
Mar 27 16:40:31 ubuntu systemd[1]: Starting Kernel crash dump capture service...
Mar 27 16:40:31 ubuntu kdump-tools[895]: Starting kdump-tools: * Creating symlink /var/lib/kdump/vmlinuz
Mar 27 16:40:31 ubuntu kdump-tools[895]: * Creating symlink /var/lib/kdump/initrd.img
Mar 27 16:40:31 ubuntu kdump-tools[895]: kexec_file_load failed: Exec format error
Mar 27 16:40:31 ubuntu kdump-tools[895]: * failed to load kdump kernel
Mar 27 16:40:31 ubuntu systemd[1]: Started Kernel crash dump capture service.
....
2)Run kexec directly:
$ sudo /sbin/kexec -p --command-line="/boot/vmlinuz-4.15.0-76-generic root=UUID=29a89ad8-8923-435e-a88c-aaf5cb379568 ro mce=ignore_ce reset_devices systemd.unit=kdump-tools-dump.service nr_cpus=1 irqpoll nousb ata_piix.prefer_ms_hyperv=0" --initrd=/boot/initrd.img-4.15.0-76-generic /boot/vmlinuz-4.15.0-64-generic
Then,these messages are shown:
Cannot open /proc/kcore: Operation not permitted
Cannot read /proc/kcore: Operation not permitted
Cannot load /boot/vmlinuz-4.15.0-76-generic
On dmesg, these messages are shown:
....
[ 538.524718] Lockdown: /proc/kcore is restricted; see man kernel_lockdown.7
....
3) Changing OS kernel to older one(I used 4.15.0-64), kdump kernel can be loaded.
$ sudo systemctl status kdump-tools
● kdump-tools.service - Kernel crash dump capture service
Loaded: loaded (/lib/systemd/system/kdump-tools.service; enabled; vendor preset: enabled)
Active: active (exited) since Wed 2020-03-25 13:39:03 JST; 5 days ago
Main PID: 832 (code=exited, status=0/SUCCESS)
Tasks: 0 (limit: 4915)
CGroup: /system.slice/kdump-tools.service
Mar 25 13:39:02 ctrl-edgen systemd[1]: Starting Kernel crash dump capture service...
Mar 25 13:39:02 ctrl-edgen kdump-tools[832]: Starting kdump-tools: * Creating symlink /var/lib/kdump/vmlinuz
Mar 25 13:39:02 ctrl-edgen kdump-tools[832]: * Creating symlink /var/lib/kdump/initrd.img
Mar 25 13:39:03 ctrl-edgen kdump-tools[832]: * loaded kdump kernel
Mar 25 13:39:03 ctrl-edgen kdump-tools[938]: loaded kdump kernel
Mar 25 13:39:03 ctrl-edgen systemd[1]: Started Kernel crash dump capture service. |
Thank you for reading this report.
This may caused by bugs in kernel, not in kdump. If so, I will report this to kernel team.
I need your comment to solve this.
[Impact]
* Kdump kernel can't be loaded using linux kernel 4.15.0-76.
[Environment]
Description: Ubuntu 18.04.4 LTS
Release: 18.04
uname:
Linux ubuntu 4.15.0-76-generic #86-Ubuntu SMP Fri Jan 17 17:24:28 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
Secure boot is enabled.
Versions:
* kexec-tools/bionic-updates,now 1:2.0.16-1ubuntu1.1
* kdump-tools/bionic-updates,now 1:1.6.5-1ubuntu1~18.04.4
[Test case]
1)After OS booted, run systemctl status kdump-tools shows these messages below:
....
● kdump-tools.service - Kernel crash dump capture service
Loaded: loaded (/lib/systemd/system/kdump-tools.service; enabled; vendor preset: enabled)
Active: active (exited) since Fri 2020-03-27 16:40:31 JST; 5min ago
Process: 895 ExecStart=/etc/init.d/kdump-tools start (code=exited, status=0/SUCCESS)
Main PID: 895 (code=exited, status=0/SUCCESS)
Mar 27 16:40:31 ubuntu systemd[1]: Starting Kernel crash dump capture service...
Mar 27 16:40:31 ubuntu kdump-tools[895]: Starting kdump-tools: * Creating symlink /var/lib/kdump/vmlinuz
Mar 27 16:40:31 ubuntu kdump-tools[895]: * Creating symlink /var/lib/kdump/initrd.img
Mar 27 16:40:31 ubuntu kdump-tools[895]: kexec_file_load failed: Exec format error
Mar 27 16:40:31 ubuntu kdump-tools[895]: * failed to load kdump kernel
Mar 27 16:40:31 ubuntu systemd[1]: Started Kernel crash dump capture service.
....
2)Run kexec directly:
$ sudo /sbin/kexec -p --command-line="/boot/vmlinuz-4.15.0-76-generic root=UUID=29a89ad8-8923-435e-a88c-aaf5cb379568 ro mce=ignore_ce reset_devices systemd.unit=kdump-tools-dump.service nr_cpus=1 irqpoll nousb ata_piix.prefer_ms_hyperv=0" --initrd=/boot/initrd.img-4.15.0-76-generic /boot/vmlinuz-4.15.0-64-generic
Then,these messages are shown:
Cannot open /proc/kcore: Operation not permitted
Cannot read /proc/kcore: Operation not permitted
Cannot load /boot/vmlinuz-4.15.0-76-generic
On dmesg, these messages are shown:
....
[ 538.524718] Lockdown: /proc/kcore is restricted; see man kernel_lockdown.7
....
3) Changing OS kernel to older one(I used 4.15.0-64), kdump kernel can be loaded.
$ sudo systemctl status kdump-tools
● kdump-tools.service - Kernel crash dump capture service
Loaded: loaded (/lib/systemd/system/kdump-tools.service; enabled; vendor preset: enabled)
Active: active (exited) since Wed 2020-03-25 13:39:03 JST; 5 days ago
Main PID: 832 (code=exited, status=0/SUCCESS)
Tasks: 0 (limit: 4915)
CGroup: /system.slice/kdump-tools.service
Mar 25 13:39:02 ctrl-edgen systemd[1]: Starting Kernel crash dump capture service...
Mar 25 13:39:02 ctrl-edgen kdump-tools[832]: Starting kdump-tools: * Creating symlink /var/lib/kdump/vmlinuz
Mar 25 13:39:02 ctrl-edgen kdump-tools[832]: * Creating symlink /var/lib/kdump/initrd.img
Mar 25 13:39:03 ctrl-edgen kdump-tools[832]: * loaded kdump kernel
Mar 25 13:39:03 ctrl-edgen kdump-tools[938]: loaded kdump kernel
Mar 25 13:39:03 ctrl-edgen systemd[1]: Started Kernel crash dump capture service. |
|
| 2020-03-31 15:53:00 |
Guilherme G. Piccoli |
bug |
|
|
added subscriber Guilherme G. Piccoli |
| 2020-04-01 01:25:27 |
yamato |
description |
Thank you for reading this report.
This may caused by bugs in kernel, not in kdump. If so, I will report this to kernel team.
I need your comment to solve this.
[Impact]
* Kdump kernel can't be loaded using linux kernel 4.15.0-76.
[Environment]
Description: Ubuntu 18.04.4 LTS
Release: 18.04
uname:
Linux ubuntu 4.15.0-76-generic #86-Ubuntu SMP Fri Jan 17 17:24:28 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
Secure boot is enabled.
Versions:
* kexec-tools/bionic-updates,now 1:2.0.16-1ubuntu1.1
* kdump-tools/bionic-updates,now 1:1.6.5-1ubuntu1~18.04.4
[Test case]
1)After OS booted, run systemctl status kdump-tools shows these messages below:
....
● kdump-tools.service - Kernel crash dump capture service
Loaded: loaded (/lib/systemd/system/kdump-tools.service; enabled; vendor preset: enabled)
Active: active (exited) since Fri 2020-03-27 16:40:31 JST; 5min ago
Process: 895 ExecStart=/etc/init.d/kdump-tools start (code=exited, status=0/SUCCESS)
Main PID: 895 (code=exited, status=0/SUCCESS)
Mar 27 16:40:31 ubuntu systemd[1]: Starting Kernel crash dump capture service...
Mar 27 16:40:31 ubuntu kdump-tools[895]: Starting kdump-tools: * Creating symlink /var/lib/kdump/vmlinuz
Mar 27 16:40:31 ubuntu kdump-tools[895]: * Creating symlink /var/lib/kdump/initrd.img
Mar 27 16:40:31 ubuntu kdump-tools[895]: kexec_file_load failed: Exec format error
Mar 27 16:40:31 ubuntu kdump-tools[895]: * failed to load kdump kernel
Mar 27 16:40:31 ubuntu systemd[1]: Started Kernel crash dump capture service.
....
2)Run kexec directly:
$ sudo /sbin/kexec -p --command-line="/boot/vmlinuz-4.15.0-76-generic root=UUID=29a89ad8-8923-435e-a88c-aaf5cb379568 ro mce=ignore_ce reset_devices systemd.unit=kdump-tools-dump.service nr_cpus=1 irqpoll nousb ata_piix.prefer_ms_hyperv=0" --initrd=/boot/initrd.img-4.15.0-76-generic /boot/vmlinuz-4.15.0-64-generic
Then,these messages are shown:
Cannot open /proc/kcore: Operation not permitted
Cannot read /proc/kcore: Operation not permitted
Cannot load /boot/vmlinuz-4.15.0-76-generic
On dmesg, these messages are shown:
....
[ 538.524718] Lockdown: /proc/kcore is restricted; see man kernel_lockdown.7
....
3) Changing OS kernel to older one(I used 4.15.0-64), kdump kernel can be loaded.
$ sudo systemctl status kdump-tools
● kdump-tools.service - Kernel crash dump capture service
Loaded: loaded (/lib/systemd/system/kdump-tools.service; enabled; vendor preset: enabled)
Active: active (exited) since Wed 2020-03-25 13:39:03 JST; 5 days ago
Main PID: 832 (code=exited, status=0/SUCCESS)
Tasks: 0 (limit: 4915)
CGroup: /system.slice/kdump-tools.service
Mar 25 13:39:02 ctrl-edgen systemd[1]: Starting Kernel crash dump capture service...
Mar 25 13:39:02 ctrl-edgen kdump-tools[832]: Starting kdump-tools: * Creating symlink /var/lib/kdump/vmlinuz
Mar 25 13:39:02 ctrl-edgen kdump-tools[832]: * Creating symlink /var/lib/kdump/initrd.img
Mar 25 13:39:03 ctrl-edgen kdump-tools[832]: * loaded kdump kernel
Mar 25 13:39:03 ctrl-edgen kdump-tools[938]: loaded kdump kernel
Mar 25 13:39:03 ctrl-edgen systemd[1]: Started Kernel crash dump capture service. |
Thank you for reading this report.
This may caused by bugs in kernel, not in kdump. If so, I will report this to kernel team.
I need your comment to solve this.
[Impact]
* Kdump kernel can't be loaded using linux kernel 4.15.0-76.
[Environment]
Description: Ubuntu 18.04.4 LTS
Release: 18.04
uname:
Linux ubuntu 4.15.0-76-generic #86-Ubuntu SMP Fri Jan 17 17:24:28 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
Secure boot is enabled.
Versions:
* kexec-tools/bionic-updates,now 1:2.0.16-1ubuntu1.1
* kdump-tools/bionic-updates,now 1:1.6.5-1ubuntu1~18.04.4
[Test case]
1)After OS booted, run systemctl status kdump-tools shows these messages below:
....
● kdump-tools.service - Kernel crash dump capture service
Loaded: loaded (/lib/systemd/system/kdump-tools.service; enabled; vendor preset: enabled)
Active: active (exited) since Fri 2020-03-27 16:40:31 JST; 5min ago
Process: 895 ExecStart=/etc/init.d/kdump-tools start (code=exited, status=0/SUCCESS)
Main PID: 895 (code=exited, status=0/SUCCESS)
Mar 27 16:40:31 ubuntu systemd[1]: Starting Kernel crash dump capture service...
Mar 27 16:40:31 ubuntu kdump-tools[895]: Starting kdump-tools: * Creating symlink /var/lib/kdump/vmlinuz
Mar 27 16:40:31 ubuntu kdump-tools[895]: * Creating symlink /var/lib/kdump/initrd.img
Mar 27 16:40:31 ubuntu kdump-tools[895]: kexec_file_load failed: Exec format error
Mar 27 16:40:31 ubuntu kdump-tools[895]: * failed to load kdump kernel
Mar 27 16:40:31 ubuntu systemd[1]: Started Kernel crash dump capture service.
....
2)Run kexec directly:
$ sudo /sbin/kexec -p --command-line="/boot/vmlinuz-4.15.0-76-generic root=UUID=29a89ad8-8923-435e-a88c-aaf5cb379568 ro mce=ignore_ce reset_devices systemd.unit=kdump-tools-dump.service nr_cpus=1 irqpoll nousb ata_piix.prefer_ms_hyperv=0" --initrd=/boot/initrd.img-4.15.0-76-generic /boot/vmlinuz-4.15.0-64-generic
Then,these messages are shown:
Cannot open /proc/kcore: Operation not permitted
Cannot read /proc/kcore: Operation not permitted
Cannot load /boot/vmlinuz-4.15.0-76-generic
On dmesg, these messages are shown:
....
[ 538.524718] Lockdown: /proc/kcore is restricted; see man kernel_lockdown.7
....
3) Changing OS kernel to older one(I used 4.15.0-64), kdump kernel can be loaded.
$ sudo systemctl status kdump-tools
● kdump-tools.service - Kernel crash dump capture service
Loaded: loaded (/lib/systemd/system/kdump-tools.service; enabled; vendor preset: enabled)
Active: active (exited) since Wed 2020-03-25 13:39:03 JST; 5 days ago
Main PID: 832 (code=exited, status=0/SUCCESS)
Tasks: 0 (limit: 4915)
CGroup: /system.slice/kdump-tools.service
Mar 25 13:39:02 ubuntu systemd[1]: Starting Kernel crash dump capture service...
Mar 25 13:39:02 ubuntu kdump-tools[832]: Starting kdump-tools: * Creating symlink /var/lib/kdump/vmlinuz
Mar 25 13:39:02 ubuntu kdump-tools[832]: * Creating symlink /var/lib/kdump/initrd.img
Mar 25 13:39:03 ubuntu kdump-tools[832]: * loaded kdump kernel
Mar 25 13:39:03 ubuntu kdump-tools[938]: loaded kdump kernel
Mar 25 13:39:03 ubuntu systemd[1]: Started Kernel crash dump capture service. |
|
| 2020-04-03 20:18:41 |
Guilherme G. Piccoli |
makedumpfile (Ubuntu): assignee |
|
Guilherme G. Piccoli (gpiccoli) |
|
| 2020-04-03 20:18:45 |
Guilherme G. Piccoli |
makedumpfile (Ubuntu): importance |
Undecided |
High |
|
| 2020-04-07 07:53:00 |
yamato |
attachment added |
|
sosreport on kernel 4.15.0-64. https://bugs.launchpad.net/ubuntu/+source/makedumpfile/+bug/1869672/+attachment/5348454/+files/sosreport-advanced-kdumpon64-2020-04-07-mhgdfqe.tar.xz |
|
| 2020-04-07 07:53:55 |
yamato |
attachment added |
|
sosreport on kernel 4.15.0-76 https://bugs.launchpad.net/ubuntu/+source/makedumpfile/+bug/1869672/+attachment/5348455/+files/sosreport-advanced-kdumpon76-2020-04-07-jyfwofm.tar.xz |
|
| 2020-04-22 21:28:19 |
Guilherme G. Piccoli |
makedumpfile (Ubuntu): status |
New |
Confirmed |
|
| 2020-04-22 21:28:32 |
Guilherme G. Piccoli |
nominated for series |
|
Ubuntu Bionic |
|
| 2020-04-22 21:28:32 |
Guilherme G. Piccoli |
bug task added |
|
makedumpfile (Ubuntu Bionic) |
|
| 2020-04-22 21:28:44 |
Guilherme G. Piccoli |
makedumpfile (Ubuntu Bionic): status |
New |
Confirmed |
|
| 2020-04-22 21:28:48 |
Guilherme G. Piccoli |
makedumpfile (Ubuntu Bionic): status |
Confirmed |
In Progress |
|
| 2020-04-22 21:28:52 |
Guilherme G. Piccoli |
makedumpfile (Ubuntu): status |
Confirmed |
In Progress |
|
| 2020-04-22 21:28:55 |
Guilherme G. Piccoli |
makedumpfile (Ubuntu Bionic): importance |
Undecided |
High |
|
| 2020-04-22 21:28:57 |
Guilherme G. Piccoli |
makedumpfile (Ubuntu Bionic): assignee |
|
Guilherme G. Piccoli (gpiccoli) |
|
| 2020-04-24 13:02:38 |
Guilherme G. Piccoli |
summary |
kdump kernel can't be loaded using kernel 4.15.0-76 |
Kdump broken since 4.15.0-65 on secureboot - purgatory cannot load |
|
| 2020-04-24 13:02:57 |
Guilherme G. Piccoli |
bug task added |
|
linux (Ubuntu) |
|
| 2020-04-24 13:03:09 |
Guilherme G. Piccoli |
bug task deleted |
makedumpfile (Ubuntu) |
|
|
| 2020-04-24 13:03:16 |
Guilherme G. Piccoli |
linux (Ubuntu): status |
New |
In Progress |
|
| 2020-04-24 13:03:19 |
Guilherme G. Piccoli |
linux (Ubuntu Bionic): status |
New |
In Progress |
|
| 2020-04-24 13:03:23 |
Guilherme G. Piccoli |
linux (Ubuntu): importance |
Undecided |
High |
|
| 2020-04-24 13:03:25 |
Guilherme G. Piccoli |
linux (Ubuntu Bionic): importance |
Undecided |
High |
|
| 2020-04-24 13:03:27 |
Guilherme G. Piccoli |
linux (Ubuntu): assignee |
|
Guilherme G. Piccoli (gpiccoli) |
|
| 2020-04-24 13:03:30 |
Guilherme G. Piccoli |
linux (Ubuntu Bionic): assignee |
|
Guilherme G. Piccoli (gpiccoli) |
|
| 2020-04-24 13:13:25 |
Guilherme G. Piccoli |
tags |
|
seg |
|
| 2020-04-24 14:12:57 |
Guilherme G. Piccoli |
attachment added |
|
0001-UBUNTU-SAUCE-x86-purgatory-Fix-Makefile-to-prevent-u.patch https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1869672/+attachment/5359499/+files/0001-UBUNTU-SAUCE-x86-purgatory-Fix-Makefile-to-prevent-u.patch |
|
| 2020-04-24 14:32:17 |
Guilherme G. Piccoli |
description |
Thank you for reading this report.
This may caused by bugs in kernel, not in kdump. If so, I will report this to kernel team.
I need your comment to solve this.
[Impact]
* Kdump kernel can't be loaded using linux kernel 4.15.0-76.
[Environment]
Description: Ubuntu 18.04.4 LTS
Release: 18.04
uname:
Linux ubuntu 4.15.0-76-generic #86-Ubuntu SMP Fri Jan 17 17:24:28 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
Secure boot is enabled.
Versions:
* kexec-tools/bionic-updates,now 1:2.0.16-1ubuntu1.1
* kdump-tools/bionic-updates,now 1:1.6.5-1ubuntu1~18.04.4
[Test case]
1)After OS booted, run systemctl status kdump-tools shows these messages below:
....
● kdump-tools.service - Kernel crash dump capture service
Loaded: loaded (/lib/systemd/system/kdump-tools.service; enabled; vendor preset: enabled)
Active: active (exited) since Fri 2020-03-27 16:40:31 JST; 5min ago
Process: 895 ExecStart=/etc/init.d/kdump-tools start (code=exited, status=0/SUCCESS)
Main PID: 895 (code=exited, status=0/SUCCESS)
Mar 27 16:40:31 ubuntu systemd[1]: Starting Kernel crash dump capture service...
Mar 27 16:40:31 ubuntu kdump-tools[895]: Starting kdump-tools: * Creating symlink /var/lib/kdump/vmlinuz
Mar 27 16:40:31 ubuntu kdump-tools[895]: * Creating symlink /var/lib/kdump/initrd.img
Mar 27 16:40:31 ubuntu kdump-tools[895]: kexec_file_load failed: Exec format error
Mar 27 16:40:31 ubuntu kdump-tools[895]: * failed to load kdump kernel
Mar 27 16:40:31 ubuntu systemd[1]: Started Kernel crash dump capture service.
....
2)Run kexec directly:
$ sudo /sbin/kexec -p --command-line="/boot/vmlinuz-4.15.0-76-generic root=UUID=29a89ad8-8923-435e-a88c-aaf5cb379568 ro mce=ignore_ce reset_devices systemd.unit=kdump-tools-dump.service nr_cpus=1 irqpoll nousb ata_piix.prefer_ms_hyperv=0" --initrd=/boot/initrd.img-4.15.0-76-generic /boot/vmlinuz-4.15.0-64-generic
Then,these messages are shown:
Cannot open /proc/kcore: Operation not permitted
Cannot read /proc/kcore: Operation not permitted
Cannot load /boot/vmlinuz-4.15.0-76-generic
On dmesg, these messages are shown:
....
[ 538.524718] Lockdown: /proc/kcore is restricted; see man kernel_lockdown.7
....
3) Changing OS kernel to older one(I used 4.15.0-64), kdump kernel can be loaded.
$ sudo systemctl status kdump-tools
● kdump-tools.service - Kernel crash dump capture service
Loaded: loaded (/lib/systemd/system/kdump-tools.service; enabled; vendor preset: enabled)
Active: active (exited) since Wed 2020-03-25 13:39:03 JST; 5 days ago
Main PID: 832 (code=exited, status=0/SUCCESS)
Tasks: 0 (limit: 4915)
CGroup: /system.slice/kdump-tools.service
Mar 25 13:39:02 ubuntu systemd[1]: Starting Kernel crash dump capture service...
Mar 25 13:39:02 ubuntu kdump-tools[832]: Starting kdump-tools: * Creating symlink /var/lib/kdump/vmlinuz
Mar 25 13:39:02 ubuntu kdump-tools[832]: * Creating symlink /var/lib/kdump/initrd.img
Mar 25 13:39:03 ubuntu kdump-tools[832]: * loaded kdump kernel
Mar 25 13:39:03 ubuntu kdump-tools[938]: loaded kdump kernel
Mar 25 13:39:03 ubuntu systemd[1]: Started Kernel crash dump capture service. |
[Impact]
* Kdump kernel can't be loaded using Linux kernel 4.15.0-65 and newer on Bionic; kexec fails to load using the "new" kexec_file_load() syscall, showing the following messages in dmesg:
kexec: Undefined symbol: __stack_chk_fail
kexec-bzImage64: Loading purgatory failed
* Reason for this was that backport from upstream commit b059f801a937 ("x86/purgatory: Use CFLAGS_REMOVE rather than reset KBUILD_CFLAGS") makes use of a config option guard that wasn't backported to Ubuntu 4.15.x series.
* Also, we found another related issue, an undefined memcpy() symbol, that was related to the above patch too. We propose here a specific fix for Bionic, in the form of the patch attached in comment #18.
[Test case]
* Basically the test consists in booting a signed kernel in a secure boot environment (this is required given Ubuntu kernel is built with CONFIG_KEXEC_VERIFY_SIG so to use kexec_file_load() we must be in a proper signed/secure booted system). It works until 4.15.0-64, and starts to fail after this release, until the current proposed version 4.15.0-97. We can also check kdump-tools service in the failing case, which shows:
systemctl status kdump-tools
[...]
kdump-tools[895]: Starting kdump-tools: * Creating symlink /var/lib/kdump/vmlinuz
kdump-tools[895]: * Creating symlink /var/lib/kdump/initrd.img
kdump-tools[895]: kexec_file_load failed: Exec format error
kdump-tools[895]: * failed to load kdump kernel
[...]
* With the patch attached in the LP, it works normally again and I was able to collect a kdump.
[Regression potential]
* Given the patch is quite simple and fixes the build of purgatory, I think the regression potential is low. One potential regression in future would be on backports to purgatory Makefile, making them more difficult/prone to errors; given purgatory is a pretty untouchable code, I consider the regression potential here to be really low. |
|
| 2020-04-24 14:55:51 |
Guilherme G. Piccoli |
bug task deleted |
makedumpfile (Ubuntu Bionic) |
|
|
| 2020-05-13 05:13:29 |
Khaled El Mously |
linux (Ubuntu Bionic): status |
In Progress |
Fix Committed |
|
| 2020-05-19 18:06:24 |
Ubuntu Kernel Bot |
tags |
seg |
seg verification-needed-bionic |
|
| 2020-05-25 12:28:55 |
Guilherme G. Piccoli |
linux (Ubuntu): status |
In Progress |
Fix Committed |
|
| 2020-05-27 11:55:35 |
Guilherme G. Piccoli |
tags |
seg verification-needed-bionic |
seg verification-done-bionic |
|
| 2020-06-09 21:09:10 |
Launchpad Janitor |
linux (Ubuntu Bionic): status |
Fix Committed |
Fix Released |
|
| 2020-06-09 21:09:10 |
Launchpad Janitor |
cve linked |
|
2020-0543 |
|
| 2020-06-10 15:47:48 |
Guilherme G. Piccoli |
linux (Ubuntu): status |
Fix Committed |
Fix Released |
|
