amd64
-----
vm
lxc launch --vm -c limits.cpu=2 -c limits.memory=2GiB
ubuntu-daily:noble noble-vm
lxc shell noble-vm
# uname -rv
6.5.0-9-generic #9-Ubuntu SMP PREEMPT_DYNAMIC Sat Oct 7 01:35:40 UTC
2023
kdump-tools
sudo apt update && apt install -y linux-crashdump # No, Yes
sudo sed 's/crashkernel=[^" ]\+/crashkernel=512M/' -i
/etc/default/grub.d/kdump-tools.cfg
sudo update-grub && sudo reboot
...
# dmesg | grep 'crashkernel.*RAM'
[ 0.018756] Reserving 512MB of memory at 816MB for crashkernel
(System RAM: 2043MB)
# kdump-config status
current state : ready to kdump
crashdump
# echo c >/proc/sysrq-trigger
...
# find /var/crash/
/var/crash/
/var/crash/kdump_lock
/var/crash/kexec_cmd
/var/crash/202311081257
/var/crash/202311081257/dmesg.202311081257
/var/crash/202311081257/dump.202311081257
/var/crash/linux-image-6.5.0-9-generic-202311081257.crash
debug symbols
dpkg -l | awk '$2 ~ /linux-image-[0-9.-]+-generic/ { print $2, $3}' \
| while read pkg version; do \
dbgpkg="linux-image-unsigned-${pkg#linux-image-}-dbgsym"; \
arch=$(dpkg --print-architecture); \
wget
"https://launchpad.net/ubuntu/+archive/primary/+files/${dbgpkg}_${version}_${arch}.ddeb";;
\
done
ar p linux-image-unsigned-*-dbgsym_*.ddeb data.tar.xz | tar xJ
--wildcards './usr/lib/debug/boot/vmlinux-*-generic'
crash (old)
# dpkg -s crash | grep Version:
Version: 8.0.2-1ubuntu1
# crash ./usr/lib/debug/boot/vmlinux-*-generic /var/crash/*/dump.*
...
crash: invalid structure member offset: module_core_size
FILE: kernel.c LINE: 3781 FUNCTION: module_init()
[/usr/bin/crash] error trace: 558bf515829f => 558bf4dd7efc =>
558bf4e64bff => 558bf4eef301
crash (new)
sudo add-apt-repository -y ppa:mfo/noble-crash-v2 && sudo apt
install -y crash
# crash ./usr/lib/debug/boot/vmlinux-*-generic /var/crash/*/dump.*
...
please wait... (determining panic task)
WARNING: active task ffff93c084ed0000 on cpu 0 not found in PID hash
KERNEL: ./usr/lib/debug/boot/vmlinux-6.5.0-9-generic
DUMPFILE: /var/crash/202311081257/dump.202311081257 [PARTIAL DUMP]
CPUS: 2
DATE: Wed Nov 8 12:57:51 UTC 2023
UPTIME: 00:01:42
LOAD AVERAGE: 0.28, 0.18, 0.07
TASKS: 3
NODENAME: noble-vm
RELEASE: 6.5.0-9-generic
VERSION: #9-Ubuntu SMP PREEMPT_DYNAMIC Sat Oct 7 01:35:40 UTC 2023
MACHINE: x86_64 (2495 Mhz)
MEMORY: 2 GB
PANIC: "Kernel panic - not syncing: sysrq triggered crash"
PID: 4488
COMMAND: "bash"
TASK: ffff93c084ed0000 [THREAD_INFO: ffff93c084ed0000]
CPU: 0
STATE: TASK_RUNNING (PANIC)
crash> bt
PID: 4488 TASK: ffff93c084ed0000 CPU: 0 COMMAND: "bash"
#0 [ffffa9c500d0bb38] machine_kexec at ffffffff9dcafa3b
#1 [ffffa9c500d0bb98] __crash_kexec at ffffffff9de133f3
#2 [ffffa9c500d0bc60] panic at ffffffff9dcf60e4
#3 [ffffa9c500d0bce0] sysrq_handle_crash at ffffffff9e6a4b5a
#4 [ffffa9c500d0bcf0] __handle_sysrq at ffffffff9e6a52e3
#5 [ffffa9c500d0bd38] write_sysrq_trigger at ffffffff9e6a5b28
#6 [ffffa9c500d0bd50] proc_reg_write at ffffffff9e1691b9
#7 [ffffa9c500d0bd70] vfs_write at ffffffff9e0af87f
#8 [ffffa9c500d0be10] ksys_write at ffffffff9e0aff83
#9 [ffffa9c500d0be50] __x64_sys_write at ffffffff9e0b0039
#10 [ffffa9c500d0be60] do_syscall_64 at ffffffff9ed399a9
#11 [ffffa9c500d0bf50] entry_SYSCALL_64_after_hwframe at
ffffffff9ee000e6
RIP: 00007fd7ba71b214 RSP: 00007ffd1900fbc8 RFLAGS: 00000202
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fd7ba71b214
RDX: 0000000000000002 RSI: 000055b4326b7d60 RDI: 0000000000000001
RBP: 000055b4326b7d60 R8: 0000000000000073 R9: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000002
R13: 00007fd7ba7ff7a0 R14: 00007fd7ba7fd120 R15: 0000000000000000
ORIG_RAX: 0000000000000001 CS: 0033 SS: 002b
crash> quit
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to crash in Ubuntu.
https://bugs.launchpad.net/bugs/2042357
Title:
Merge crash 8.0.3+ds1-3 into Noble
Status in crash package in Ubuntu:
In Progress
Status in crash package in Debian:
Fix Released
Bug description:
Work in progress; rebasing on 8.0.3+ds1-3, and testing.
...
$ rmadison -a source crash | grep noble
crash | 8.0.2-1ubuntu1 | noble | source
$ rmadison -a source crash -u debian | grep 'unstable '
crash | 8.0.2-1 | unstable | source
crash | 8.0.3+ds1-3 | unstable | source
...
Debian bugs:
https://bugs.debian.org/1054805
Please update crash to 8.0.3
https://bugs.debian.org/1055117
FTBFS: crash 8.0.3-1 is missing gdb-10.2.tar.gz
...
Docs:
https://github.com/canonical/ubuntu-maintainers-handbook/blob/main/PackageMerging.md
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/crash/+bug/2042357/+subscriptions
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