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conf: Perform error checking in virDomainDeviceInfoFormat()

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virXMLFormatElement() might fail, but we were not checking
its return value.

Fixing this requires us to change virDomainDeviceInfoFormat()
so that it can report an error back to the caller.

Introduced-by: 0d6b87335c00451b0923ecc91d617f71e4135bf8
Spotted-by: Coverity
Reported-by: John Ferlan <jferlan@redhat.com>
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
This commit is contained in:
Andrea Bolognani 2018-11-16 16:16:26 +01:00
parent c3a208af0d
commit 240ee7c1d8
1 changed files with 66 additions and 31 deletions
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97
src/conf/domain_conf.c
View File

@ -6418,13 +6418,14 @@ virDomainVirtioOptionsFormat(virBufferPtr buf,
}
static void ATTRIBUTE_NONNULL(2)
static int ATTRIBUTE_NONNULL(2)
virDomainDeviceInfoFormat(virBufferPtr buf,
virDomainDeviceInfoPtr info,
unsigned int flags)
{
virBuffer attrBuf = VIR_BUFFER_INITIALIZER;
virBuffer childBuf = VIR_BUFFER_INITIALIZER;
int ret = -1;
if ((flags & VIR_DOMAIN_DEF_FORMAT_ALLOW_BOOT) && info->bootIndex) {
virBufferAsprintf(buf, "<boot order='%u'", info->bootIndex);
@ -6467,8 +6468,11 @@ virDomainDeviceInfoFormat(virBufferPtr buf,
}
if (info->type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_NONE ||
info->type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_VIRTIO_S390)
return;
info->type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_VIRTIO_S390) {
/* We're done here */
ret = 0;
goto cleanup;
}
virBufferAsprintf(&attrBuf, " type='%s'",
virDomainDeviceAddressTypeToString(info->type));
@ -6562,10 +6566,16 @@ virDomainDeviceInfoFormat(virBufferPtr buf,
break;
}
virXMLFormatElement(buf, "address", &attrBuf, &childBuf);
if (virXMLFormatElement(buf, "address", &attrBuf, &childBuf) < 0)
goto cleanup;
ret = 0;
cleanup:
virBufferFreeAndReset(&attrBuf);
virBufferFreeAndReset(&childBuf);
return ret;
}
static int
@ -24299,8 +24309,10 @@ virDomainDiskDefFormat(virBufferPtr buf,
if (def->src->encryption && !def->src->encryptionInherited &&
virStorageEncryptionFormat(buf, def->src->encryption) < 0)
return -1;
virDomainDeviceInfoFormat(buf, &def->info,
flags | VIR_DOMAIN_DEF_FORMAT_ALLOW_BOOT);
if (virDomainDeviceInfoFormat(buf, &def->info,
flags | VIR_DOMAIN_DEF_FORMAT_ALLOW_BOOT) < 0) {
return -1;
}
if (virDomainDiskDefFormatPrivateData(buf, def, flags, xmlopt) < 0)
return -1;
@ -24475,7 +24487,8 @@ virDomainControllerDefFormat(virBufferPtr buf,
virDomainControllerDriverFormat(&childBuf, def);
virDomainDeviceInfoFormat(&childBuf, &def->info, flags);
if (virDomainDeviceInfoFormat(&childBuf, &def->info, flags) < 0)
goto cleanup;
if (def->type == VIR_DOMAIN_CONTROLLER_TYPE_PCI &&
def->opts.pciopts.pcihole64) {
@ -24613,7 +24626,8 @@ virDomainFSDefFormat(virBufferPtr buf,
if (def->readonly)
virBufferAddLit(buf, "<readonly/>\n");
virDomainDeviceInfoFormat(buf, &def->info, flags);
if (virDomainDeviceInfoFormat(buf, &def->info, flags) < 0)
goto cleanup;
if (def->space_hard_limit)
virBufferAsprintf(buf, "<space_hard_limit unit='bytes'>"
@ -25412,9 +25426,11 @@ virDomainNetDefFormat(virBufferPtr buf,
virDomainNetDefCoalesceFormatXML(buf, def->coalesce);
virDomainDeviceInfoFormat(buf, &def->info,
flags | VIR_DOMAIN_DEF_FORMAT_ALLOW_BOOT
| VIR_DOMAIN_DEF_FORMAT_ALLOW_ROM);
if (virDomainDeviceInfoFormat(buf, &def->info,
flags | VIR_DOMAIN_DEF_FORMAT_ALLOW_BOOT
| VIR_DOMAIN_DEF_FORMAT_ALLOW_ROM) < 0) {
return -1;
}
virBufferAdjustIndent(buf, -2);
virBufferAddLit(buf, "</interface>\n");
@ -25723,7 +25739,8 @@ virDomainChrDefFormat(virBufferPtr buf,
if (virDomainChrTargetDefFormat(buf, def, flags) < 0)
return -1;
virDomainDeviceInfoFormat(buf, &def->info, flags);
if (virDomainDeviceInfoFormat(buf, &def->info, flags) < 0)
return -1;
virBufferAdjustIndent(buf, -2);
virBufferAsprintf(buf, "</%s>\n", elementName);
@ -25772,7 +25789,8 @@ virDomainSmartcardDefFormat(virBufferPtr buf,
_("unexpected smartcard type %d"), def->type);
goto cleanup;
}
virDomainDeviceInfoFormat(&childBuf, &def->info, flags);
if (virDomainDeviceInfoFormat(&childBuf, &def->info, flags) < 0)
goto cleanup;
if (virBufferCheckError(&childBuf) < 0)
goto cleanup;
@ -25843,7 +25861,8 @@ virDomainTPMDefFormat(virBufferPtr buf,
break;
}
virDomainDeviceInfoFormat(buf, &def->info, flags);
if (virDomainDeviceInfoFormat(buf, &def->info, flags) < 0)
return -1;
virBufferAdjustIndent(buf, -2);
virBufferAddLit(buf, "</tpm>\n");
@ -25873,7 +25892,8 @@ virDomainSoundDefFormat(virBufferPtr buf,
for (i = 0; i < def->ncodecs; i++)
virDomainSoundCodecDefFormat(&childBuf, def->codecs[i]);
virDomainDeviceInfoFormat(&childBuf, &def->info, flags);
if (virDomainDeviceInfoFormat(&childBuf, &def->info, flags) < 0)
goto cleanup;
if (virBufferCheckError(&childBuf) < 0)
goto cleanup;
@ -25922,7 +25942,8 @@ virDomainMemballoonDefFormat(virBufferPtr buf,
if (def->period)
virBufferAsprintf(&childrenBuf, "<stats period='%i'/>\n", def->period);
virDomainDeviceInfoFormat(&childrenBuf, &def->info, flags);
if (virDomainDeviceInfoFormat(&childrenBuf, &def->info, flags) < 0)
goto cleanup;
if (def->virtio) {
virBuffer driverBuf = VIR_BUFFER_INITIALIZER;
@ -25965,7 +25986,8 @@ virDomainNVRAMDefFormat(virBufferPtr buf,
{
virBufferAddLit(buf, "<nvram>\n");
virBufferAdjustIndent(buf, 2);
virDomainDeviceInfoFormat(buf, &def->info, flags);
if (virDomainDeviceInfoFormat(buf, &def->info, flags) < 0)
return -1;
virBufferAdjustIndent(buf, -2);
virBufferAddLit(buf, "</nvram>\n");
@ -25998,7 +26020,8 @@ virDomainWatchdogDefFormat(virBufferPtr buf,
goto cleanup;
}
virDomainDeviceInfoFormat(&childBuf, &def->info, flags);
if (virDomainDeviceInfoFormat(&childBuf, &def->info, flags) < 0)
goto cleanup;
if (virBufferCheckError(&childBuf) < 0)
goto cleanup;
@ -26035,7 +26058,8 @@ static int virDomainPanicDefFormat(virBufferPtr buf,
virDomainPanicModelTypeToString(def->model));
virBufferSetChildIndent(&childrenBuf, buf);
virDomainDeviceInfoFormat(&childrenBuf, &def->info, 0);
if (virDomainDeviceInfoFormat(&childrenBuf, &def->info, 0) < 0)
goto cleanup;
if (virBufferCheckError(&childrenBuf) < 0)
goto cleanup;
@ -26087,7 +26111,8 @@ virDomainShmemDefFormat(virBufferPtr buf,
virBufferAddLit(buf, "/>\n");
}
virDomainDeviceInfoFormat(buf, &def->info, flags);
if (virDomainDeviceInfoFormat(buf, &def->info, flags) < 0)
return -1;
virBufferAdjustIndent(buf, -2);
virBufferAddLit(buf, "</shmem>\n");
@ -26144,7 +26169,8 @@ virDomainRNGDefFormat(virBufferPtr buf,
virBufferAddLit(buf, "/>\n");
}
virDomainDeviceInfoFormat(buf, &def->info, flags);
if (virDomainDeviceInfoFormat(buf, &def->info, flags) < 0)
goto cleanup;
virBufferAdjustIndent(buf, -2);
virBufferAddLit(buf, "</rng>\n");
@ -26271,7 +26297,8 @@ virDomainMemoryDefFormat(virBufferPtr buf,
virDomainMemoryTargetDefFormat(buf, def);
virDomainDeviceInfoFormat(buf, &def->info, flags);
if (virDomainDeviceInfoFormat(buf, &def->info, flags) < 0)
return -1;
virBufferAdjustIndent(buf, -2);
virBufferAddLit(buf, "</memory>\n");
@ -26348,7 +26375,8 @@ virDomainVideoDefFormat(virBufferPtr buf,
virBufferAddLit(buf, "/>\n");
}
virDomainDeviceInfoFormat(buf, &def->info, flags);
if (virDomainDeviceInfoFormat(buf, &def->info, flags) < 0)
goto cleanup;
virBufferAdjustIndent(buf, -2);
virBufferAddLit(buf, "</video>\n");
@ -26404,7 +26432,8 @@ virDomainInputDefFormat(virBufferPtr buf,
virBufferAddLit(&childbuf, "/>\n");
}
virBufferEscapeString(&childbuf, "<source evdev='%s'/>\n", def->source.evdev);
virDomainDeviceInfoFormat(&childbuf, &def->info, flags);
if (virDomainDeviceInfoFormat(&childbuf, &def->info, flags) < 0)
goto cleanup;
if (virBufferCheckError(&childbuf) < 0)
goto cleanup;
@ -27004,9 +27033,11 @@ virDomainHostdevDefFormat(virBufferPtr buf,
if (def->shareable)
virBufferAddLit(buf, "<shareable/>\n");
virDomainDeviceInfoFormat(buf, def->info,
flags | VIR_DOMAIN_DEF_FORMAT_ALLOW_BOOT
| VIR_DOMAIN_DEF_FORMAT_ALLOW_ROM);
if (virDomainDeviceInfoFormat(buf, def->info,
flags | VIR_DOMAIN_DEF_FORMAT_ALLOW_BOOT
| VIR_DOMAIN_DEF_FORMAT_ALLOW_ROM) < 0) {
return -1;
}
virBufferAdjustIndent(buf, -2);
virBufferAddLit(buf, "</hostdev>\n");
@ -27032,8 +27063,10 @@ virDomainRedirdevDefFormat(virBufferPtr buf,
if (virDomainChrSourceDefFormat(buf, def->source, flags) < 0)
return -1;
virDomainDeviceInfoFormat(buf, &def->info,
flags | VIR_DOMAIN_DEF_FORMAT_ALLOW_BOOT);
if (virDomainDeviceInfoFormat(buf, &def->info,
flags | VIR_DOMAIN_DEF_FORMAT_ALLOW_BOOT) < 0) {
return -1;
}
virBufferAdjustIndent(buf, -2);
virBufferAddLit(buf, "</redirdev>\n");
return 0;
@ -27095,7 +27128,8 @@ virDomainHubDefFormat(virBufferPtr buf,
goto cleanup;
}
virDomainDeviceInfoFormat(&childBuf, &def->info, flags);
if (virDomainDeviceInfoFormat(&childBuf, &def->info, flags) < 0)
goto cleanup;
if (virBufferCheckError(&childBuf) < 0)
goto cleanup;
@ -27816,7 +27850,8 @@ virDomainVsockDefFormat(virBufferPtr buf,
if (virXMLFormatElement(&childBuf, "cid", &cidAttrBuf, NULL) < 0)
goto cleanup;
virDomainDeviceInfoFormat(&childBuf, &vsock->info, 0);
if (virDomainDeviceInfoFormat(&childBuf, &vsock->info, 0) < 0)
goto cleanup;
if (virXMLFormatElement(buf, "vsock", &attrBuf, &childBuf) < 0)
goto cleanup;