Tested in dump file form in arm64; working.
arm64
-----
vm
SERIES=noble
ARCH=arm64
DISK=${SERIES}_${ARCH}.qcow2
wget
https://cloud-images.ubuntu.com/$SERIES/current/${SERIES}-server-cloudimg-${ARCH}.img
qemu-img create -F qcow2 -b ${SERIES}-server-cloudimg-${ARCH}.img -f
qcow2 $DISK 8G
sudo apt install -y qemu-system-arm qemu-efi
dd if=/dev/zero of=flash1.img bs=1M count=64
dd if=/dev/zero of=flash0.img bs=1M count=64
dd if=/usr/share/qemu-efi/QEMU_EFI.fd of=flash0.img conv=notrunc
qemu-system-aarch64 \
-machine virt -cpu cortex-a57 \
-pflash flash0.img -pflash flash1.img \
\
-smp cpus=2 -m 2048 \
-nodefaults -no-user-config \
-nographic -serial stdio \
\
-drive file=$DISK,if=none,id=drive0 \
-device virtio-blk-device,drive=drive0 \
\
-drive file=test-cidata.iso,media=cdrom \
\
-netdev user,hostfwd=::22222-:22,id=net0 \
-device virtio-net-device,netdev=net0
$ ssh ubuntu@127.0.0.1 -p 22222
$ lsb_release -cs
No LSB modules are available.
noble
$ uname -m
aarch64
$ uname -rv
6.6.0-14-generic #14-Ubuntu SMP PREEMPT_DYNAMIC Thu Nov 30 10:53:08 UTC
2023
kdump-tools
sudo apt update && sudo 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
$ sudo dmesg | grep 'crashkernel reserved:'
[ 0.000000] crashkernel reserved: 0x0000000089800000 -
0x00000000a9800000 (512 MB)
$ sudo kdump-config status
current state : ready to kdump
crashdump
$ echo c | sudo tee /proc/sysrq-trigger
$ find /var/crash
/var/crash
/var/crash/kexec_cmd
/var/crash/202401082101
/var/crash/202401082101/dmesg.202401082101
/var/crash/202401082101/dump.202401082101
/var/crash/kdump_lock
/var/crash/linux-image-6.6.0-14-generic-202401082101.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
sudo add-apt-repository -y ppa:mfo/lp2047861-noble-crash && sudo
apt install -y crash
$ dpkg -s crash | grep Version:
Version: 8.0.4-1ubuntu1
$ crash ./usr/lib/debug/boot/vmlinux-*-generic /var/crash/*/dump.*
...
KERNEL: ./usr/lib/debug/boot/vmlinux-6.6.0-14-generic
DUMPFILE: /var/crash/202401082101/dump.202401082101 [PARTIAL DUMP]
CPUS: 2
DATE: Mon Jan 8 20:58:35 UTC 2024
UPTIME: 00:24:51
LOAD AVERAGE: 0.08, 0.15, 0.67
TASKS: 127
NODENAME: test
RELEASE: 6.6.0-14-generic
VERSION: #14-Ubuntu SMP PREEMPT_DYNAMIC Thu Nov 30 10:53:08 UTC
2023
MACHINE: aarch64 (unknown Mhz)
MEMORY: 2 GB
PANIC: "Kernel panic - not syncing: sysrq triggered crash"
PID: 4928
COMMAND: "tee"
TASK: ffff000000d13300 [THREAD_INFO: ffff000000d13300]
CPU: 0
STATE: TASK_RUNNING (PANIC)
crash> bt
PID: 4928 TASK: ffff000000d13300 CPU: 0 COMMAND: "tee"
#0 [ffff800083f63980] machine_kexec at ffff800080042e70
#1 [ffff800083f63b10] __crash_kexec at ffff8000802017a0
#2 [ffff800083f63b90] panic at ffff8000800c8b68
#3 [ffff800083f63c20] sysrq_handle_crash at ffff800080d3a81c
#4 [ffff800083f63c30] __handle_sysrq at ffff800080d3b694
#5 [ffff800083f63ca0] write_sysrq_trigger at ffff800080d3c1d8
#6 [ffff800083f63cc0] proc_reg_write at ffff8000805d4688
#7 [ffff800083f63d40] vfs_write at ffff8000804faa48
#8 [ffff800083f63d90] ksys_write at ffff8000804faec4
#9 [ffff800083f63dc0] __arm64_sys_write at ffff8000804fafac
#10 [ffff800083f63e10] invoke_syscall at ffff800080033d68
#11 [ffff800083f63e40] el0_svc_common.constprop.0 at ffff800080033e60
#12 [ffff800083f63e70] do_el0_svc at ffff800080033f7c
#13 [ffff800083f63e80] el0_svc at ffff80008158286c
#14 [ffff800083f63ea0] el0t_64_sync_handler at ffff800081582f54
#15 [ffff800083f63fe0] el0t_64_sync at ffff800080011e44
PC: 0000e295c3915c28 LR: 0000e295c38abb6c SP: 0000ffffcb160ac0
X29: 0000ffffcb160ac0 X28: 0000000000000002 X27: 0000000000000002
X26: 0000ffffcb160c08 X25: 0000000000000002 X24: 0000000000000002
X23: 0000000000000002 X22: 0000000000000002 X21: 0000c232444942c0
X20: 0000ffffcb160c08 X19: 0000000000000003 X18: 0000000000000003
X17: 0000e295c38a9c00 X16: 0000c2320e44fdb0 X15: 0000000000000000
X14: ffffffffffffffff X13: 0000000000000000 X12: 000000000000001a
X11: 0101010101010101 X10: 00000000000001b0 X9: 0000000000000028
X8: 0000000000000040 X7: 0000000000000001 X6: 0000000000000000
X5: 00000000fbad2c87 X4: 00000000ffffffff X3: 0000000000000001
X2: 0000000000000002 X1: 0000ffffcb160c08 X0: 0000000000000003
ORIG_X0: 0000000000000003 SYSCALLNO: 40 PSTATE: 20001000
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/2047861
Title:
Merge crash 8.0.4-1 into Noble
Status in crash package in Ubuntu:
In Progress
Bug description:
$ rmadison -a source crash | grep noble
crash | 8.0.3+ds1-3ubuntu1 | noble | source
$ rmadison -a source -u debian -s unstable crash
crash | 8.0.4-1 | unstable | source
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/crash/+bug/2047861/+subscriptions
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