Package: qemu-system-x86 Version: 1:3.1+dfsg-8+deb10u4 On our kernelci lab, each qemu worker pass an healtcheck job each day and after each job failure, so it is heavily used. The healtcheck job is a Linux boot with a stable release.
Since we upgraded our worker to buster, the qemu x86_64 healthcheck randomly panic with: <6>[ 0.001000] APIC: Switch to symmetric I/O mode setup <6>[ 0.001000] ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1 <3>[ 0.005000] ..MP-BIOS bug: 8254 timer not connected to IO-APIC <6>[ 0.005000] ...trying to set up timer (IRQ0) through the 8259A ... <6>[ 0.005000] ..... (found apic 0 pin 2) ... <6>[ 0.009000] ....... failed. <6>[ 0.009000] ...trying to set up timer as Virtual Wire IRQ... <6>[ 0.009000] ..... failed. <6>[ 0.009000] ...trying to set up timer as ExtINT IRQ... <6>[ 0.009000] ..... failed :(. <0>[ 0.009000] Kernel panic - not syncing: IO-APIC + timer doesn't work! Boot with apic=debug and send a report. Then try booting with the 'noapic' option. <4>[ 0.009000] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.23 #1 <4>[ 0.009000] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 <4>[ 0.009000] Call Trace: <4>[ 0.009000] dump_stack+0x50/0x70 <4>[ 0.009000] panic+0xf6/0x2b7 <4>[ 0.009000] setup_IO_APIC+0x7c3/0x81c <4>[ 0.009000] ? clear_IO_APIC_pin+0xb3/0x100 <4>[ 0.009000] x86_late_time_init+0x1b/0x20 <4>[ 0.009000] start_kernel+0x429/0x4e2 <4>[ 0.009000] secondary_startup_64+0xa4/0xb0 The qemu is called with: /usr/bin/qemu-system-x86_64 -cpu host -enable-kvm -nographic -net nic,model=virtio,macaddr=52:54:00:12:34:58 -net user -m 512 -monitor none -kernel /var/lib/lava/dispatcher/tmp/741722/deployimages-xl6ogak_/kernel/bzImage -append "console=ttyS0,115200 root=/dev/ram0 debug verbose console_msg_format=syslog" -initrd /var/lib/lava/dispatcher/tmp/741722/deployimages-xl6ogak_/ramdisk/rootfs.cpio.gz -drive format=qcow2,file=/var/lib/lava/dispatcher/tmp/741722/apply-overlay-guest-sfn3zqna/lava-guest.qcow2,media=disk,if=ide,id=lavatest We have tried to upgrade the Linux version from 5.0.21 to 5.4.23 without any change. Only our buster worker fail like this. No problem with stretch, and no problem on my gentoo worker (qemu 4.2.0). Since more recent qemu work perfectly, I suspect a bug in the buster release.
