Merge pull request #2962 from cyphar/golint-fixes

*: clean up remaining golangci-lint failures

.github/workflows/validate.yml

@@ -20,9 +20,7 @@ jobs:
       - uses: golangci/golangci-lint-action@v2
         with:
           # must be specified without patch version
-          version: v1.36
-          # Only show new issues for a pull request.
-          only-new-issues: true
+          version: v1.40
 
   shfmt:
     runs-on: ubuntu-20.04

libcontainer/cgroups/ebpf/devicefilter/devicefilter.go

@@ -110,8 +110,7 @@ func (p *program) appendRule(rule *devices.Rule) error {
 		return errors.New("the program is finalized")
 	}
 
-	bpfType := int32(-1)
-	hasType := true
+	var bpfType int32
 	switch rule.Type {
 	case devices.CharDevice:
 		bpfType = int32(unix.BPF_DEVCG_DEV_CHAR)
@@ -119,7 +118,7 @@ func (p *program) appendRule(rule *devices.Rule) error {
 		bpfType = int32(unix.BPF_DEVCG_DEV_BLOCK)
 	default:
 		// We do not permit 'a', nor any other types we don't know about.
-		return errors.Errorf("invalid Type %q", string(rule.Type))
+		return errors.Errorf("invalid type %q", string(rule.Type))
 	}
 	if rule.Major > math.MaxUint32 {
 		return errors.Errorf("invalid major %d", rule.Major)
@@ -150,12 +149,10 @@ func (p *program) appendRule(rule *devices.Rule) error {
 		nextBlockSym     = "block-" + strconv.Itoa(p.blockID+1)
 		prevBlockLastIdx = len(p.insts) - 1
 	)
-	if hasType {
-		p.insts = append(p.insts,
-			// if (R2 != bpfType) goto next
-			asm.JNE.Imm(asm.R2, bpfType, nextBlockSym),
-		)
-	}
+	p.insts = append(p.insts,
+		// if (R2 != bpfType) goto next
+		asm.JNE.Imm(asm.R2, bpfType, nextBlockSym),
+	)
 	if hasAccess {
 		p.insts = append(p.insts,
 			// if (R3 & bpfAccess != R3 /* use R1 as a temp var */) goto next

libcontainer/cgroups/fs/memory.go

@@ -200,14 +200,6 @@ func (s *MemoryGroup) GetStats(path string, stats *cgroups.Stats) error {
 	return nil
 }
 
-func memoryAssigned(cgroup *configs.Cgroup) bool {
-	return cgroup.Resources.Memory != 0 ||
-		cgroup.Resources.MemoryReservation != 0 ||
-		cgroup.Resources.MemorySwap > 0 ||
-		cgroup.Resources.OomKillDisable ||
-		(cgroup.Resources.MemorySwappiness != nil && int64(*cgroup.Resources.MemorySwappiness) != -1)
-}
-
 func getMemoryData(path, name string) (cgroups.MemoryData, error) {
 	memoryData := cgroups.MemoryData{}
 

libcontainer/integration/seccomp_test.go

@@ -37,7 +37,7 @@ func TestSeccompDenyGetcwdWithErrno(t *testing.T) {
 
 	container, err := newContainer(t, config)
 	ok(t, err)
-	defer container.Destroy()
+	defer container.Destroy() //nolint:errcheck
 
 	buffers := newStdBuffers()
 	pwd := &libcontainer.Process{
@@ -100,7 +100,7 @@ func TestSeccompDenyGetcwd(t *testing.T) {
 
 	container, err := newContainer(t, config)
 	ok(t, err)
-	defer container.Destroy()
+	defer container.Destroy() //nolint:errcheck
 
 	buffers := newStdBuffers()
 	pwd := &libcontainer.Process{
@@ -170,7 +170,7 @@ func TestSeccompPermitWriteConditional(t *testing.T) {
 
 	container, err := newContainer(t, config)
 	ok(t, err)
-	defer container.Destroy()
+	defer container.Destroy() //nolint:errcheck
 
 	buffers := newStdBuffers()
 	dmesg := &libcontainer.Process{
@@ -226,7 +226,7 @@ func TestSeccompDenyWriteConditional(t *testing.T) {
 
 	container, err := newContainer(t, config)
 	ok(t, err)
-	defer container.Destroy()
+	defer container.Destroy() //nolint:errcheck
 
 	buffers := newStdBuffers()
 	dmesg := &libcontainer.Process{

libcontainer/seccomp/patchbpf/enosys_linux_test.go

@@ -106,14 +106,6 @@ var testArches = []string{
 	"s390x",
 }
 
-func archStringToNative(arch string) (nativeArch, error) {
-	scmpArch, err := libseccomp.GetArchFromString(arch)
-	if err != nil {
-		return 0, fmt.Errorf("unknown architecture %q: %v", arch, err)
-	}
-	return archToNative(scmpArch)
-}
-
 func testEnosysStub(t *testing.T, defaultAction configs.Action, arches []string) {
 	explicitSyscalls := []string{
 		"setns",

libcontainer/system/proc.go

@@ -96,7 +96,7 @@ func parseStat(data string) (stat Stat_t, err error) {
 	// one (PID) and two (Name) in the paren-split.
 	parts = strings.Split(data[i+2:], " ")
 	var state int
-	fmt.Sscanf(parts[3-3], "%c", &state)
+	fmt.Sscanf(parts[3-3], "%c", &state) //nolint:staticcheck // "3-3" is more readable in this context.
 	stat.State = State(state)
 	fmt.Sscanf(parts[22-3], "%d", &stat.StartTime)
 	return stat, nil