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lxc: fix variable storage order before call

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virDomainConfNWFilterInstantiate() was called without updated
net->ifname, it caused in some cases throwing error message. If
function failed, change is reverted.

Resolves: https://gitlab.com/libvirt/libvirt/-/issues/658
Signed-off-by: Adam Julis <ajulis@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
This commit is contained in:
Adam Julis 2024-10-15 11:51:38 +02:00 committed by Jiri Denemark
parent f2710260d4
commit 0fd36e9656
1 changed files with 10 additions and 6 deletions
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16
src/lxc/lxc_process.c
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@ -271,6 +271,7 @@ virLXCProcessSetupInterfaceTap(virDomainDef *vm,
{
g_autofree char *parentVeth = NULL;
g_autofree char *containerVeth = NULL;
g_autofree char *backupIfname = NULL;
const virNetDevVPortProfile *vport = virDomainNetGetActualVirtPortProfile(net);
VIR_DEBUG("calling vethCreate()");
@ -315,14 +316,17 @@ virLXCProcessSetupInterfaceTap(virDomainDef *vm,
return NULL;
}
if (net->filter &&
virDomainConfNWFilterInstantiate(vm->name, vm->uuid, net, false) < 0)
return NULL;
/* success is guaranteed, so update the interface object */
g_free(net->ifname);
/* success almost guaranteed, next function needs updated net->ifname */
backupIfname = g_steal_pointer(&net->ifname);
net->ifname = g_steal_pointer(&parentVeth);
if (net->filter &&
virDomainConfNWFilterInstantiate(vm->name, vm->uuid, net, false) < 0) {
g_free(net->ifname);
net->ifname = g_steal_pointer(&backupIfname);
return NULL;
}
return g_steal_pointer(&containerVeth);
}