qemu segfaults with dump-guest-memory

[nasastry]

Environment: HostOS # cat /etc/os-release NAME="CentOS Linux" VERSION="7 (AltArch)" ID="centos" ID_LIKE="rhel fedora" VERSION_ID="7" PRETTY_NAME="CentOS Linux 7 (AltArch)" ANSI_COLOR="0;31" CPE_NAME="cpe:/o:centos:centos:7" HOME_URL="https://www.centos.org/" BUG_REPORT_URL="https://bugs.centos.org/" SIG_FAMILY="AltArch ppc64le"

CENTOS_MANTISBT_PROJECT="CentOS-7" CENTOS_MANTISBT_PROJECT_VERSION="7" REDHAT_SUPPORT_PRODUCT="centos" REDHAT_SUPPORT_PRODUCT_VERSION="7"

# uname -a Linux zzfp365-lp1.aus.stglabs.ibm.com 4.13.0-4.rel.git49564cb.el7.centos.ppc64le #1 SMP Fri Sep 22 22:49:59 -03 2017 ppc64le ppc64le ppc64le GNU/Linux

# rpm -qa | grep qemu qemu-common-2.10.0-2.rel.gitc334a4e.el7.centos.ppc64le qemu-system-ppc-2.10.0-2.rel.gitc334a4e.el7.centos.ppc64le qemu-img-2.10.0-2.rel.gitc334a4e.el7.centos.ppc64le libvirt-daemon-driver-qemu-3.6.0-3.rel.gitdd9401b.el7.centos.ppc64le qemu-2.10.0-2.rel.gitc334a4e.el7.centos.ppc64le ipxe-roms-qemu-20170123-1.git4e85b27.el7_4.1.noarch qemu-system-x86-2.10.0-2.rel.gitc334a4e.el7.centos.ppc64le

Steps to re-produce:

# qemu-system-ppc64 -M none -nographic -m 256 QEMU 2.10.0 monitor - type 'help' for more information (qemu) dump-guest-memory /dev/null Segmentation fault

Mirrored with LTC bug #159859

[gkurz]

This issue is already fixed upstream:

https://github.com/qemu/qemu/commit/b1fde1ef5106c92dd12f1f0cfcb8c76e57d7f681

The new behavior is to reject dump when you don't have a CPU:

(qemu) dump-guest-memory /dev/null this feature or command is not currently supported

[cdeadmin]

------- Comment From bssrikanth@in.ibm.com 2017-12-20 03:50:30 EDT------- Tested on release branch.

[root@ltczzj3 qemu-iotests]# uname -r 4.14.0-1.rel.git68b4afb.el7.centos.ppc64le [root@ltczzj3 qemu-iotests]# qemu-system-ppc64 -M none -nographic -m 256 QEMU 2.11.0 monitor - type 'help' for more information (qemu) dump-guest-memory /dev/null this feature or command is not currently supported