95 lines
3.4 KiB
Diff
95 lines
3.4 KiB
Diff
From 96d171449cb675b48838b955ddd0ba41a783dba1 Mon Sep 17 00:00:00 2001
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Message-ID: <96d171449cb675b48838b955ddd0ba41a783dba1.1772815314.git.jdenemar@redhat.com>
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From: Pavel Hrdina <phrdina@redhat.com>
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Date: Thu, 26 Feb 2026 10:18:23 +0100
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Subject: [PATCH] domain_conf: initialize network hostdev private data
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Currently virDomainNetDef and virDomainActualNetDef use
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virDomainHostdevDef directly as structure and the code doesn't call
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virDomainHostdevDefNew() that would initialize private data.
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This is hackish quick fix to solve a crash that happens in two
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scenarios:
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1. attaching any interface with hostdev backend
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0x0000fffbfc0e2a90 in qemuDomainAttachHostPCIDevice (driver=0xfffbb4006750, vm=0xfffbf001f790, hostdev=0xfffbf400b150) at ../src/qemu/qemu_hotplug.c:1652
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1652 if ((ret = qemuFDPassDirectTransferMonitor(hostdevPriv->vfioDeviceFd, priv->mon)) < 0)
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2. starting VM with interface with hostdev backend using iommufd
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0x00007f6638d5b9ca in qemuProcessOpenVfioDeviceFd (hostdev=hostdev@entry=0x7f6634425ee0) at ../src/qemu/qemu_process.c:7719
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7719 hostdevPriv->vfioDeviceFd = qemuFDPassDirectNew(name, &vfioDeviceFd);
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Proper fix for this issue is to refactor network code to use pointer and to
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use virDomainHostdevDefNew().
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Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
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Reviewed-by: Peter Krempa <pkrempa@redhat.com>
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(cherry picked from commit fe782ed334ea0d4373e6dad093f5815fc925a56b)
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https://issues.redhat.com/browse/RHEL-151916
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Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
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---
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src/conf/domain_conf.c | 23 +++++++++++++++++++++--
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1 file changed, 21 insertions(+), 2 deletions(-)
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diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
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index 16ea9f0b2e..8877aefb7c 100644
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--- a/src/conf/domain_conf.c
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+++ b/src/conf/domain_conf.c
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@@ -3489,6 +3489,20 @@ void virDomainVideoDefFree(virDomainVideoDef *def)
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}
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+static int
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+virDomainHostdevDefPrivateDataNew(virDomainHostdevDef *def,
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+ virDomainXMLOption *xmlopt)
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+{
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+ if (!xmlopt || !xmlopt->privateData.hostdevNew)
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+ return 0;
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+
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+ if (!(def->privateData = xmlopt->privateData.hostdevNew()))
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+ return -1;
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+
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+ return 0;
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+}
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+
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+
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virDomainHostdevDef *
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virDomainHostdevDefNew(virDomainXMLOption *xmlopt)
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{
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@@ -3498,8 +3512,7 @@ virDomainHostdevDefNew(virDomainXMLOption *xmlopt)
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def->info = g_new0(virDomainDeviceInfo, 1);
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- if (xmlopt && xmlopt->privateData.hostdevNew &&
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- !(def->privateData = xmlopt->privateData.hostdevNew())) {
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+ if (virDomainHostdevDefPrivateDataNew(def, xmlopt) < 0) {
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VIR_FREE(def->info);
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VIR_FREE(def);
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return NULL;
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@@ -9675,6 +9688,9 @@ virDomainActualNetDefParseXML(xmlNodePtr node,
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virDomainHostdevDef *hostdev = &actual->data.hostdev.def;
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int type;
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+ if (virDomainHostdevDefPrivateDataNew(hostdev, xmlopt) < 0)
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+ goto error;
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+
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hostdev->parentnet = parent;
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hostdev->info = &parent->info;
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/* The helper function expects type to already be found and
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@@ -10368,6 +10384,9 @@ virDomainNetDefParseXML(virDomainXMLOption *xmlopt,
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g_autofree char *addrtype = virXPathString("string(./source/address/@type)", ctxt);
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int type;
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+ if (virDomainHostdevDefPrivateDataNew(&def->data.hostdev.def, xmlopt) < 0)
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+ return NULL;
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+
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def->data.hostdev.def.parentnet = def;
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def->data.hostdev.def.info = &def->info;
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def->data.hostdev.def.mode = VIR_DOMAIN_HOSTDEV_MODE_SUBSYS;
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--
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2.53.0
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