QEMU segfaults

[mrc0mmand]

Looks like the patch for the intermittent segfaults doesn't work (or maybe I f-ed up when rewriting it for the C9S package).

From one of today's runs:

+ timeout --foreground 600 /bin/qemu-system-x86_64 -smp 8 -net none -m 768M -nographic -kernel /boot/vmlinuz-5.14.0-432.el9.x86_64 -drive format=raw,cache=unsafe,file=/var/tmp/systemd-tests/systemd-test.Ok5T1x/basic.img -device virtio-rng-pci,max-bytes=1024,period=1000 -cpu max -initrd /var/tmp/ci-sanity-initramfs-5.14.0-390.el9.x86_64.img -append 'root=LABEL=systemd_boot rw raid=noautodetect rd.luks=0 loglevel=2 init=/usr/lib/systemd/systemd console=ttyS0 SYSTEMD_UNIT_PATH=/usr/lib/systemd/tests/testdata/testsuite-01.units:/usr/lib/systemd/tests/testdata/units: systemd.unit=testsuite.target systemd.wants=testsuite-01.service noresume oops=panic panic=1 softlockup_panic=1 systemd.wants=end.service foo -- -z bar --- baz debug systemd.log_level=debug rd.systemd.log_target=console systemd.default_standard_output=journal+console'
+ tee /var/tmp/systemd-tests/systemd-test.Ok5T1x/console.log
qemu-system-x86_64: warning: Machine type 'pc-i440fx-rhel7.6.0' is deprecated: machine types for previous major releases are deprecated
�c�[?7l�[2J�[0mSeaBIOS (version 1.16.3-2.el9)
Booting from ROM...
early console in setup code
Probing EDD (edd=off to disable)... o�c�[?7l�[2Jtimeout: the monitored command dumped core
..//test-functions: line 637: 123014 Segmentation fault      "${qemu_cmd[@]}" "${qemu_options[@]}" -append "${kernel_params[*]} ${KERNEL_APPEND:-}" 2>&1
     123015 Done                    | tee "${TESTDIR:?}/console.log"
E: qemu failed with exit code 139

The original workarounds were brought back (81d3e80) to make the CI stable again.

AI: investigate (probably build latest QEMU from git and revive #703)

[mrc0mmand]

Replacing the stock QEMU with a git one on C9S:

# XXX
dnf remove -y qemu-kvm
dnf builddep -y --enablerepo crb qemu-kvm
dnf install -y bzip2
git clone https://gitlab.com/qemu-project/qemu --branch staging-8.2
pushd qemu
./configure --target-list=x86_64-softmmu --enable-debug
make -j "$(nproc)"
./build/qemu-system-x86_64 --version
ln -svf "$PWD/build/qemu-system-x86_64" /usr/bin/qemu-system-x86_64
popd

[mrc0mmand]

-> https://gitlab.com/qemu-project/qemu/-/issues/2220#note_1837303030