$ sudo /tmp/tmp.u3jP6LAlnj/usr/local/sbin/kexec --debug -l -c
/boot/vmlinuz-6.5.0-6-generic
arch_process_options:178: command_line: (null)
arch_process_options:180: initrd: (null)
arch_process_options:182: dtb: (null)
arch_process_options:185: console: (null)
Try gzip decompression.
kernel: 0xffff8e4ef010 kernel_size: 0xda0988
set_phys_offset: phys_offset : 0000000040000000 (method : vmcoreinfo pt_note)
get_memory_ranges:+[0] 0000000040000000 - 000000023c58ffff
get_memory_ranges:- 00000000fa000000 - 00000000ffffffff
get_memory_ranges:- 00000001001dc000 - 00000001001dcfff
get_memory_ranges:- 0000000100210000 - 000000010021ffff
get_memory_ranges:- 0000000100220000 - 000000010022ffff
get_memory_ranges:- 0000000100230000 - 000000010023ffff
get_memory_ranges:- 0000000109540000 - 000000010a0fffff
get_memory_ranges:- 000000022fb50000 - 000000022fb50fff
get_memory_ranges:- 000000022fd5d000 - 000000022fd64fff
get_memory_ranges:- 0000000234400000 - 000000023c3fffff
get_memory_ranges:- 000000023c4a6000 - 000000023c4a6fff
get_memory_ranges:- 000000023c580000 - 000000023c58ffff
get_memory_ranges:+[9] 000000023c730000 - 000000023fbfffff
get_memory_ranges:- 000000023dbf1000 - 000000023e7f1fff
get_memory_ranges:- 000000023eaff000 - 000000023ebbefff
get_memory_ranges:- 000000023ebbf000 - 000000023ebbffff
get_memory_ranges:- 000000023ebc0000 - 000000023ebfffff
get_memory_ranges:- 000000023ec02000 - 000000023ec03fff
get_memory_ranges:- 000000023ec04000 - 000000023ec04fff
get_memory_ranges:- 000000023ec05000 - 000000023fbfffff
get_memory_ranges:+[12] 000000023ffe0000 - 000000023fffffff
get_memory_ranges:- 000000023ffe0000 - 000000023fffffff
System RAM ranges;
0000000040000000-00000000f9ffffff (0)
0000000100000000-00000001001dbfff (0)
00000001001dd000-000000010020ffff (0)
0000000100240000-000000010953ffff (0)
000000010a100000-000000022fb4ffff (0)
000000022fb51000-000000022fd5cfff (0)
000000022fd65000-00000002343fffff (0)
000000023c400000-000000023c4a5fff (0)
000000023c4a7000-000000023c57ffff (0)
000000023c730000-000000023dbf0fff (0)
000000023e7f2000-000000023eafefff (0)
000000023ec00000-000000023ec01fff (0)
elf_arm64_probe: Not an ELF executable.
image_arm64_probe: Bad arm64 image header.
pez_arm64_probe: PROBE.
pez_prepare: kexec can only decompress gziped and lzma images.
Cannot determine the file type of /boot/vmlinuz-6.5.0-6-generic
Even git snapshot of kexec-tools cannot handle zstd commpressed zimg
** Summary changed:
- Unable to capture kernel crash dump using arm64 mantic 6.5.0-6-generic
-proposed kernel
+ kexec enable to load/kdump zstd compressed zimg
** Changed in: kdump-tools (Ubuntu)
Status: Incomplete => Invalid
** Changed in: linux (Ubuntu)
Status: Incomplete => Triaged
** Changed in: kexec-tools (Ubuntu)
Importance: Undecided => Wishlist
** Changed in: linux (Ubuntu)
Importance: Undecided => Critical
** Tags added: block-proposed-mantic
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https://bugs.launchpad.net/bugs/2037398
Title:
kexec enable to load/kdump zstd compressed zimg
Status in kdump-tools package in Ubuntu:
Invalid
Status in kexec-tools package in Ubuntu:
Triaged
Status in linux package in Ubuntu:
Triaged
Bug description:
While testing the 6.5.0-6-generic proposed arm64 generic kernel I
encountered issues being able to use kdump.
After enabling -proposed and installing the -proposed 6.5.0-6 kernel
and rebooting I encountered the following:
`kdump-config show` shows `current state: Not ready to kdump` and
looking at the status of the kdump-tools services I see `Cannot
determine the file type of /var/lib/kdump/vmlinuz`
Full output:
```
ubuntu@cloudimg:~$ sudo kdump-config show
DUMP_MODE: kdump
USE_KDUMP: 1
KDUMP_COREDIR: /var/crash
crashkernel addr: 0xde000000
/var/lib/kdump/vmlinuz: symbolic link to /boot/vmlinuz-6.5.0-6-generic
kdump initrd:
/var/lib/kdump/initrd.img: symbolic link to
/var/lib/kdump/initrd.img-6.5.0-6-generic
current state: Not ready to kdump
kexec command:
no kexec command recorded
ubuntu@cloudimg:~$ sudo service kdump-tools status
● kdump-tools.service - Kernel crash dump capture service
Loaded: loaded (/lib/systemd/system/kdump-tools.service; enabled;
preset: enabled)
Active: active (exited) since Tue 2023-09-26 09:21:44 UTC; 5min ago
Process: 515 ExecStart=/etc/init.d/kdump-tools start (code=exited,
status=0/SUCCESS)
Main PID: 515 (code=exited, status=0/SUCCESS)
CPU: 4min 21.329s
Sep 26 09:16:14 cloudimg systemd[1]: Starting kdump-tools.service - Kernel
crash dump capture service...
Sep 26 09:16:24 cloudimg kdump-tools[515]: Starting kdump-tools:
Sep 26 09:16:24 cloudimg kdump-tools[537]: * Creating symlink
/var/lib/kdump/vmlinuz
Sep 26 09:16:32 cloudimg kdump-tools[580]: kdump-tools: Generating
/var/lib/kdump/initrd.img-6.5.0-6-generic
Sep 26 09:21:42 cloudimg kdump-tools[537]: * Creating symlink
/var/lib/kdump/initrd.img
Sep 26 09:21:43 cloudimg kdump-tools[5538]: Cannot determine the file type of
/var/lib/kdump/vmlinuz
Sep 26 09:21:44 cloudimg kdump-tools[537]: * failed to load kdump kernel
Sep 26 09:21:44 cloudimg kdump-tools[5539]: failed to load kdump kernel
Sep 26 09:21:44 cloudimg systemd[1]: Finished kdump-tools.service - Kernel
crash dump capture service.
ubuntu@cloudimg:~$ ls -al /var/lib/kdump/vmlinuz
lrwxrwxrwx 1 root root 29 Sep 26 09:16 /var/lib/kdump/vmlinuz ->
/boot/vmlinuz-6.5.0-6-generic
ubuntu@cloudimg:~$ file /var/lib/kdump/vmlinuz
/var/lib/kdump/vmlinuz: symbolic link to /boot/vmlinuz-6.5.0-6-generic
ubuntu@cloudimg:~$ sudo file /boot/vmlinuz-6.5.0-6-generic
/boot/vmlinuz-6.5.0-6-generic: PE32+ executable (EFI application) Aarch64
(stripped to external PDB), for MS Windows, 2 sections
```
The reboot with 6.5.0-6 was successful and the reboot after linux-crashdump
install was successful too.
I used https://ubuntu.com/server/docs/kernel-crash-dump guide for installing
linux-crashdump and attempting to trigger a dump.
I used arm64 qcow cloud image from http://cloud-
images.ubuntu.com/mantic/20230925/mantic-server-cloudimg-arm64.img to
test the above emulated on amd64.
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