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== Reported by <d.herrendoer...@de.ibm.com> - 2024-12-04 ==
---Problem Description---
[UBUNTU 24.04] OS guest boot issues on 9p filesystem
---uname output---
Linux winlnxnw 6.8.0-45-generic #45-Ubuntu SMP Fri Aug 30 11:09:37 UTC 2024
s390x s390x s390x GNU/Linux
Contact Information = d.herrendoer...@de.ibm.com
Machine Type = 3931-7G4
---Steps to Reproduce---
Run this script (fails with a qemu error message)
#!/bin/bash
# Cleanup target dir
[ -d ./target ] && rm -rf target
mkdir target
# Add configuration updates
mkdir -p ./target/etc/initramfs-tools/
echo 9p >> ./target/etc/initramfs-tools/modules
echo 9pnet_virtio >> ./target/etc/initramfs-tools/modules
# Add the test script
cat > ./target/test_init << EOF
#!/bin/bash
echo "Test for unix domain sockets"
nc -Ul /socket &
sleep 1
echo "Sockets work" | nc -UN /socket || echo "Sockets fail"
echo o > /proc/sysrq-trigger
sleep 999
EOF
chmod 700 ./target/test_init
# Create an Ubuntu 23.10 around it
echo "Creating Ubuntu target OS"
debootstrap --variant=minbase\
--include=udev,kmod,initramfs-tools,systemd,netcat-openbsd,linux-image-generic \
--exclude=man,bash-completion \
noble ./target > /dev/null || exit 1
# Run the test in 9p forwarded filesystem
echo "Running OS in qemu"
qemu-system-s390x \
-m 8192 \
-smp 4 \
-nodefaults -nographic -no-reboot -no-user-config \
-kernel ./target/boot/vmlinuz \
-initrd ./target/boot/initrd.img \
-append 'root=fsRoot rw rootfstype=9p
rootflags=trans=virtio,version=9p2000.L,msize=512000,cache=mmap,posixacl
console=ttysclp0 init=/test_init quiet' \
-fsdev
local,security_model=passthrough,multidevs=remap,id=fsdev-fsRoot,path=./target \
-device virtio-9p-pci,id=fsRoot,fsdev=fsdev-fsRoot,mount_tag=fsRoot \
-device virtio-serial-ccw -device sclpconsole,chardev=console \
-chardev stdio,id=console,signal=off
---Debugger---
A debugger is not configured
Userspace tool obtained from project website: na
Userspace rpm: qemu-(current).deb
Userspace tool common name: qemu
The userspace tool has the following bit modes: both
*Additional Instructions for d.herrendoer...@de.ibm.com:
-Post a private note with access information to the machine that the bug is
occuring on.
-Attach ltrace and strace of userspace application.
** Affects: linux (Ubuntu)
Importance: Undecided
Assignee: Skipper Bug Screeners (skipper-screen-team)
Status: New
** Tags: architecture-s39064 bugnameltc-210802 severity-critical
targetmilestone-inin---
--
[UBUNTU 24.04] OS guest boot issues on 9p filesystem
https://bugs.launchpad.net/bugs/2091099
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