Please check if this commit has solved the issue: https://git.qemu.org/?p=qemu.git;a=commit;h=ebb6ff25cd888a52a64a9adc3692541c6d1d9a42
-- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1839428 Title: qemu core dumped when repeat "system_reset" multiple times during guest boot Status in QEMU: Confirmed Bug description: commit 864ab314f1d924129d06ac7b571f105a2b76a4b2 (HEAD, tag: v4.1.0-rc4, origin/master, origin/HEAD, master) Test arch:x86 and power Steps: 1.Boot up guest with command power cmdline: /usr/libexec/backup/qemu-kvm \ -smp 8 \ -m 4096 \ -nodefaults \ -device virtio-blk-pci,id=image1,drive=drive_image1,bootindex=1,bus=pci.0,addr=0x7 \ -drive file=rhel77-ppc64le-virtio.qcow2,if=none,id=drive_image1,format=qcow2,cache=none \ -chardev stdio,mux=on,id=serial_id_serial0,server,nowait,signal=off \ -device spapr-vty,id=serial111,chardev=serial_id_serial0 \ -mon chardev=serial_id_serial0,mode=readline \ x86 cmdline: /usr/libexec/qemu-kvm \ -m 4096 -smp 8 \ -boot menu=on \ -device virtio-blk-pci,id=image1,drive=drive_image1\ -drive file=rhel77-64-virtio.qcow2,if=none,id=drive_image1,format=qcow2,cache=none \ -vga std \ -vnc :9 \ -nographic \ -device virtio-net-pci,netdev=net0,id=nic0,mac=52:54:00:c4:e7:84 \ -netdev tap,id=net0,script=/etc/qemu-ifup,downscript=/etc/qemu-ifdown,vhost=on \ 2.when guest start to boot up kernel(when no output infomation),run hmp command "system_reset" Result: Sometimes,qemu core dumped with error as following: system_reset (qemu) qemu-system-ppc64: /root/qemu/hw/virtio/virtio.c:225: vring_get_region_caches: Assertion `caches != NULL' failed. b.sh: line 11: 73679 Aborted (core dumped) /usr/local/bin/qemu-system-ppc64 -enable-kvm -smp 8 -m 4096 -nodefaults -device virtio-blk-pci,id=image1,drive=drive_image1,bootindex=1,bus=pci.0,addr=0x7 -drive file=rhel77-ppc64le-virtio.qcow2,if=none,id=drive_image1,format=qcow2,cache=none -chardev stdio,mux=on,id=serial_id_serial0,server,nowait,signal=off -device spapr-vty,id=serial111,chardev=serial_id_serial0 -mon chardev=serial_id_serial0,mode=readline To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1839428/+subscriptions