External/libvirt
1
0
Fork 0
mirror of https://gitlab.com/libvirt/libvirt.git synced 2024-12-22 05:35:25 +00:00
Code Issues Packages Projects Releases Wiki Activity

conf: Fix rawio/sgio checks for non-scsi hostdev devices

Browse Source 
The current hostdev parsing logic sets rawio or sgio even if the hostdev type
is not 'scsi'. The rawio field in virDomainHostdevSubsysSCSI overlaps with
wwpn field in virDomainHostdevSubsysSCSIVHost, consequently setting a bogus
pointer value such as 0x1 or 0x2 from virDomainHostdevSubsysSCSIVHost's
point of view. This leads to a segmentation fault when it attempts to free
wwpn.

While setting sgio does not appear to crash, it shares the same flawed logic
as setting rawio.

Instead, we ensure these are set only after the hostdev type check succeeds.
This patch also adds two test cases to exercise both scenarios.

Fixes: bdb95b520c
Signed-off-by: Rayhan Faizel <rayhan.faizel@gmail.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This commit is contained in:
Rayhan Faizel 2024-07-02 20:27:13 +05:30 committed by Michal Privoznik
parent 738b201aad
commit 70e826ec6a
6 changed files with 106 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
src/conf/domain_conf.c
View File

@ -6220,6 +6220,8 @@ virDomainHostdevDefParseXMLSubsys(xmlNodePtr node,
virDomainHostdevSubsysMediatedDev *mdevsrc = &def->source.subsys.u.mdev;
virTristateBool managed;
g_autofree char *model = NULL;
virDomainDeviceSGIO sgio;
virTristateBool rawio;
int rv;
/* @managed can be read from the xml document - it is always an
@ -6259,7 +6261,7 @@ virDomainHostdevDefParseXMLSubsys(xmlNodePtr node,
if ((rv = virXMLPropEnum(node, "sgio",
virDomainDeviceSGIOTypeFromString,
VIR_XML_PROP_NONZERO,
&scsisrc->sgio)) < 0) {
&sgio)) < 0) {
return -1;
}
@ -6269,18 +6271,30 @@ virDomainHostdevDefParseXMLSubsys(xmlNodePtr node,
_("sgio is only supported for scsi host device"));
return -1;
}
/* Set sgio only after checking if hostdev type is 'scsi' to avoid
* clobbering other union structures.
*/
scsisrc->sgio = sgio;
}
if ((rv = virXMLPropTristateBool(node, "rawio",
VIR_XML_PROP_NONE,
&scsisrc->rawio)) < 0) {
&rawio)) < 0) {
return -1;
}
if (rv > 0 && def->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_SCSI) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("rawio is only supported for scsi host device"));
return -1;
if (rv > 0) {
if (def->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_SCSI) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("rawio is only supported for scsi host device"));
return -1;
}
/* Set rawio only after checking if hostdev type is 'scsi' to avoid
* clobbering other union structures.
*/
scsisrc->rawio = rawio;
}
if (def->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_MDEV &&

1
tests/qemuxmlconfdata/hostdev-scsi-vhost-rawio-invalid.x86_64-latest.err Normal file
View File

@ -0,0 +1 @@
XML error: rawio is only supported for scsi host device

41
tests/qemuxmlconfdata/hostdev-scsi-vhost-rawio-invalid.xml Normal file
View File

@ -0,0 +1,41 @@
<domain type='qemu'>
<name>QEMUGuest2</name>
<uuid>c7a5fdbd-edaf-9466-926a-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='block' device='disk'>
<source dev='/dev/HostVG/QEMUGuest2'/>
<target dev='hda' bus='ide'/>
<address type='drive' controller='0' bus='0' target='0' unit='0'/>
</disk>
<controller type='scsi' index='0' model='virtio-scsi'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
</controller>
<controller type='usb' index='0'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
</controller>
<controller type='ide' index='0'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
</controller>
<controller type='pci' index='0' model='pci-root'/>
<input type='mouse' bus='ps2'/>
<input type='keyboard' bus='ps2'/>
<hostdev mode='subsystem' type='scsi_host' rawio='yes'>
<source protocol='vhost' wwpn='naa.5123456789abcde0'/>
</hostdev>
<memballoon model='virtio'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
</memballoon>
</devices>
</domain>

1
tests/qemuxmlconfdata/hostdev-scsi-vhost-sgio-invalid.x86_64-latest.err Normal file
View File

@ -0,0 +1 @@
XML error: sgio is only supported for scsi host device

41
tests/qemuxmlconfdata/hostdev-scsi-vhost-sgio-invalid.xml Normal file
View File

@ -0,0 +1,41 @@
<domain type='qemu'>
<name>QEMUGuest2</name>
<uuid>c7a5fdbd-edaf-9466-926a-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='block' device='disk'>
<source dev='/dev/HostVG/QEMUGuest2'/>
<target dev='hda' bus='ide'/>
<address type='drive' controller='0' bus='0' target='0' unit='0'/>
</disk>
<controller type='scsi' index='0' model='virtio-scsi'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
</controller>
<controller type='usb' index='0'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
</controller>
<controller type='ide' index='0'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
</controller>
<controller type='pci' index='0' model='pci-root'/>
<input type='mouse' bus='ps2'/>
<input type='keyboard' bus='ps2'/>
<hostdev mode='subsystem' type='scsi_host' sgio='filtered'>
<source protocol='vhost' wwpn='naa.5123456789abcde0'/>
</hostdev>
<memballoon model='virtio'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
</memballoon>
</devices>
</domain>

2
tests/qemuxmlconftest.c
View File

@ -2945,6 +2945,8 @@ mymain(void)
DO_TEST_CAPS_LATEST("sound-device-virtio")
DO_TEST_CAPS_LATEST_FAILURE("disk-network-iscsi-zero-hosts-invalid")
DO_TEST_CAPS_LATEST_PARSE_ERROR("hostdev-scsi-vhost-rawio-invalid")
DO_TEST_CAPS_LATEST_PARSE_ERROR("hostdev-scsi-vhost-sgio-invalid")
/* check that all input files were actually used here */
if (testConfXMLCheck(existingTestCases) < 0)