Under the test environment, driver->domainEventState is uninitialized. If a
disk gets dropped, it will attempt to queue an event which will cause a
segmentation fault. This crash does not occur during normal use.
This patch adds a quick check to ensure driver->domainEventState is not NULL
along with a testcase exercising the dropping of disks with startupPolicy set
as 'optional'.
Signed-off-by: Rayhan Faizel <rayhan.faizel@xxxxxxxxx>
---
src/qemu/qemu_domain.c | 3 +-
...tuppolicy-optional-drop.x86_64-latest.args | 33 ++++++++++++++++
...rtuppolicy-optional-drop.x86_64-latest.xml | 38 +++++++++++++++++++
.../disk-startuppolicy-optional-drop.xml | 23 +++++++++++
tests/qemuxmlconftest.c | 2 +
5 files changed, 98 insertions(+), 1 deletion(-)
create mode 100644 tests/qemuxmlconfdata/disk-startuppolicy-optional-drop.x86_64-latest.args
create mode 100644 tests/qemuxmlconfdata/disk-startuppolicy-optional-drop.x86_64-latest.xml
create mode 100644 tests/qemuxmlconfdata/disk-startuppolicy-optional-drop.xml
diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index 7ba2ea4a5e..109c5bbd52 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -7592,7 +7592,8 @@ qemuDomainCheckRemoveOptionalDisk(virQEMUDriver *driver,
virDomainDiskDefFree(disk);
}
- virObjectEventStateQueue(driver->domainEventState, event);
+ if (driver->domainEventState)
+ virObjectEventStateQueue(driver->domainEventState, event);
}
diff --git a/tests/qemuxmlconfdata/disk-startuppolicy-optional-drop.x86_64-latest.args b/tests/qemuxmlconfdata/disk-startuppolicy-optional-drop.x86_64-latest.args
new file mode 100644
index 0000000000..13ddbc1a5d
--- /dev/null
+++ b/tests/qemuxmlconfdata/disk-startuppolicy-optional-drop.x86_64-latest.args
@@ -0,0 +1,33 @@
+LC_ALL=C \
+PATH=/bin \
+HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1 \
+USER=test \
+LOGNAME=test \
+XDG_DATA_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.local/share \
+XDG_CACHE_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.cache \
+XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.config \
+/usr/bin/qemu-system-x86_64 \
+-name guest=QEMUGuest1,debug-threads=on \
+-S \
+-object '{"qom-type":"secret","id":"masterKey0","format":"raw","file":"/var/lib/libvirt/qemu/domain--1-QEMUGuest1/master-key.aes"}' \
+-machine pc,usb=off,dump-guest-core=off,memory-backend=pc.ram,acpi=off \
+-accel tcg \
+-cpu qemu64 \
+-m size=219136k \
+-object '{"qom-type":"memory-backend-ram","id":"pc.ram","size":224395264}' \
+-overcommit mem-lock=off \
+-smp 1,sockets=1,cores=1,threads=1 \
+-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
+-display none \
+-no-user-config \
+-nodefaults \
+-chardev socket,id=charmonitor,fd=1729,server=on,wait=off \
+-mon chardev=charmonitor,id=monitor,mode=control \
+-rtc base=utc \
+-no-shutdown \
+-boot strict=on \
+-device '{"driver":"piix3-usb-uhci","id":"usb","bus":"pci.0","addr":"0x1.0x2"}' \
+-device '{"driver":"lsi","id":"scsi0","bus":"pci.0","addr":"0x2"}' \
+-audiodev '{"id":"audio1","driver":"none"}' \
+-sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny \
+-msg timestamp=on
diff --git a/tests/qemuxmlconfdata/disk-startuppolicy-optional-drop.x86_64-latest.xml b/tests/qemuxmlconfdata/disk-startuppolicy-optional-drop.x86_64-latest.xml
new file mode 100644
index 0000000000..27d0639109
--- /dev/null
+++ b/tests/qemuxmlconfdata/disk-startuppolicy-optional-drop.x86_64-latest.xml
@@ -0,0 +1,38 @@
+<domain type='qemu'>
+ <name>QEMUGuest1</name>
+ <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+ <memory unit='KiB'>219100</memory>
+ <currentMemory unit='KiB'>219100</currentMemory>
+ <vcpu placement='static'>1</vcpu>
+ <os>
+ <type arch='x86_64' machine='pc'>hvm</type>
+ <boot dev='hd'/>
+ </os>
+ <cpu mode='custom' match='exact' check='none'>
+ <model fallback='forbid'>qemu64</model>
+ </cpu>
+ <clock offset='utc'/>
+ <on_poweroff>destroy</on_poweroff>
+ <on_reboot>restart</on_reboot>
+ <on_crash>destroy</on_crash>
+ <devices>
+ <emulator>/usr/bin/qemu-system-x86_64</emulator>
+ <disk type='volume' device='disk'>
+ <driver name='qemu'/>
+ <source pool='inactive' volume='inactive' startupPolicy='optional'/>
+ <target dev='sda' bus='scsi'/>
+ <address type='drive' controller='0' bus='0' target='0' unit='0'/>
+ </disk>
+ <controller type='usb' index='0' model='piix3-uhci'>
+ <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
+ </controller>
+ <controller type='pci' index='0' model='pci-root'/>
+ <controller type='scsi' index='0' model='lsilogic'>
+ <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
+ </controller>
+ <input type='mouse' bus='ps2'/>
+ <input type='keyboard' bus='ps2'/>
+ <audio id='1' type='none'/>
+ <memballoon model='none'/>
+ </devices>
+</domain>
diff --git a/tests/qemuxmlconfdata/disk-startuppolicy-optional-drop.xml b/tests/qemuxmlconfdata/disk-startuppolicy-optional-drop.xml
new file mode 100644
index 0000000000..c6c59978c6
--- /dev/null
+++ b/tests/qemuxmlconfdata/disk-startuppolicy-optional-drop.xml
@@ -0,0 +1,23 @@
+<domain type='qemu'>
+ <name>QEMUGuest1</name>
+ <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+ <memory unit='KiB'>219100</memory>
+ <currentMemory unit='KiB'>219100</currentMemory>
+ <vcpu placement='static'>1</vcpu>
+ <os>
+ <type arch='x86_64' machine='pc'>hvm</type>
+ <boot dev='hd'/>
+ </os>
+ <clock offset='utc'/>
+ <on_poweroff>destroy</on_poweroff>
+ <on_reboot>restart</on_reboot>
+ <on_crash>destroy</on_crash>
+ <devices>
+ <emulator>/usr/bin/qemu-system-x86_64</emulator>
+ <disk type='volume' device='disk'>
+ <source pool='inactive' volume='inactive' startupPolicy='optional'/>
+ <target dev='sda'/>
+ </disk>
+ <memballoon model='none'/>
+ </devices>
+</domain>
diff --git a/tests/qemuxmlconftest.c b/tests/qemuxmlconftest.c
index 5700ea314f..16ecc1b7e4 100644
--- a/tests/qemuxmlconftest.c
+++ b/tests/qemuxmlconftest.c
@@ -2986,6 +2986,8 @@ mymain(void)
DO_TEST_CAPS_LATEST("net-usb")
DO_TEST_CAPS_LATEST("sound-device-virtio")
+ DO_TEST_CAPS_LATEST("disk-startuppolicy-optional-drop")
+
/* check that all input files were actually used here */
if (testConfXMLCheck(existingTestCases) < 0)
ret = -1;
--
2.34.1
