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util: Forbid resetting non-endpoint devices

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It is destructive to attempt reset on a pci- or cardbus-bridge, the
host can crash.  The bridges won't contain any guest data and neither
they can be passed through using vfio/stub.  So, no point in allowing a
reset on them.

Signed-off-by: Shivaprasad G Bhat <sbhat@linux.vnet.ibm.com>
This commit is contained in:
Shivaprasad G Bhat 2017-01-23 19:07:10 +05:30 committed by Martin Kletzander
parent bec9b9b01a
commit bd12889616
1 changed files with 12 additions and 0 deletions
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12
src/util/virpci.c
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@ -933,6 +933,18 @@ virPCIDeviceReset(virPCIDevicePtr dev,
char *drvName = NULL;
int ret = -1;
int fd = -1;
int hdrType = -1;
if (virPCIGetHeaderType(dev, &hdrType) < 0)
return -1;
if (hdrType != VIR_PCI_HEADER_ENDPOINT) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Invalid attempt to reset PCI device %s. "
"Only PCI endpoint devices can be reset"),
dev->name);
return -1;
}
if (activeDevs && virPCIDeviceListFind(activeDevs, dev)) {
virReportError(VIR_ERR_INTERNAL_ERROR,