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vbox: handle errors of virDomainHostdevDefAlloc correctly

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The original code ignored errors of virDomainHostdevDefAlloc,
however, we should properly do error return from the function
if it occurs.

The fix pulls out virDomainHostdevDefAlloc from the loop and
executes it all together before the loop. So we can easily
return on errors without the notion of other memory allocations
in the loop.

The deallocation code is separated from the allocation code
because it will be used by a further patch for fixing other error
handlings.

Reported-by: Laine Stump <laine@laine.org>
Signed-off-by: Ryota Ozaki <ozaki.ryota@gmail.com>
This commit is contained in:
Ryota Ozaki 2013-12-01 23:46:06 +09:00 committed by Daniel Veillard
parent 82b5dd23f3
commit 1ed7e014dd
1 changed files with 15 additions and 4 deletions
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19
src/vbox/vbox_tmpl.c
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@ -2269,6 +2269,12 @@ static void vboxHostDeviceGetXMLDesc(vboxGlobalData *data, virDomainDefPtr def,
if (VIR_ALLOC_N(def->hostdevs, def->nhostdevs) < 0)
goto release_filters;
for (i = 0; i < def->nhostdevs; i++) {
def->hostdevs[i] = virDomainHostdevDefAlloc();
if (!def->hostdevs[i])
goto release_hostdevs;
}
for (i = 0; i < deviceFilters.count; i++) {
PRBool active = PR_FALSE;
IUSBDeviceFilter *deviceFilter = deviceFilters.items[i];
@ -2284,10 +2290,6 @@ static void vboxHostDeviceGetXMLDesc(vboxGlobalData *data, virDomainDefPtr def,
if (!active)
continue;
def->hostdevs[USBFilterCount] = virDomainHostdevDefAlloc();
if (!def->hostdevs[USBFilterCount])
continue;
def->hostdevs[USBFilterCount]->mode =
VIR_DOMAIN_HOSTDEV_MODE_SUBSYS;
def->hostdevs[USBFilterCount]->source.subsys.type =
@ -2322,6 +2324,15 @@ release_controller:
#else
VBOX_RELEASE(USBDeviceFilters);
#endif
return;
release_hostdevs:
for (i = 0; i < def->nhostdevs; i++)
virDomainHostdevDefFree(def->hostdevs[i]);
VIR_FREE(def->hostdevs);
goto release_filters;
}
static char *vboxDomainGetXMLDesc(virDomainPtr dom, unsigned int flags) {