Merge pull request #5580 from dfr/freebsd-resolv-conf

buildah: fix a nil pointer reference on FreeBSD

run_common.go

@@ -84,12 +84,17 @@ func (b *Builder) createResolvConf(rdir string, chownOpts *idtools.IDPair) (stri
 
 // addResolvConf copies files from host and sets them up to bind mount into container
 func (b *Builder) addResolvConfEntries(file string, networkNameServer []string,
-	namespaces []specs.LinuxNamespace, keepHostServers, ipv6 bool) error {
+	spec *specs.Spec, keepHostServers, ipv6 bool) error {
 	defaultConfig, err := config.Default()
 	if err != nil {
 		return fmt.Errorf("failed to get config: %w", err)
 	}
 
+	var namespaces []specs.LinuxNamespace
+	if spec.Linux != nil {
+		namespaces = spec.Linux.Namespaces
+	}
+
 	dnsServers, dnsSearch, dnsOptions := b.CommonBuildOpts.DNSServers, b.CommonBuildOpts.DNSSearch, b.CommonBuildOpts.DNSOptions
 	nameservers := make([]string, 0, len(defaultConfig.Containers.DNSServers.Get())+len(dnsServers))
 	nameservers = append(nameservers, defaultConfig.Containers.DNSServers.Get()...)
@@ -1254,7 +1259,7 @@ func (b *Builder) runUsingRuntimeSubproc(isolation define.Isolation, options Run
 			}
 
 			if resolvFile != "" {
-				err = b.addResolvConfEntries(resolvFile, netResult.dnsServers, spec.Linux.Namespaces, netResult.keepHostResolvers, netResult.ipv6)
+				err = b.addResolvConfEntries(resolvFile, netResult.dnsServers, spec, netResult.keepHostResolvers, netResult.ipv6)
 				if err != nil {
 					return err
 				}

run_linux.go

@@ -423,7 +423,7 @@ func (b *Builder) Run(command []string, options RunOptions) error {
 		// Only add entries here if we do not have to do setup network,
 		// if we do we have to do it much later after the network setup.
 		if !configureNetwork {
-			err = b.addResolvConfEntries(resolvFile, nil, spec.Linux.Namespaces, false, true)
+			err = b.addResolvConfEntries(resolvFile, nil, spec, false, true)
 			if err != nil {
 				return err
 			}