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Fix: Add nil checks for all Linux spec dereferences #398

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Fix: Add nil checks for all Linux spec dereferences #398

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0b0ce09
fix: add nil checks for all Linux spec dereferences
Yashika0724 Jan 24, 2026
baa6733
fix: add missing Exec nil checks
Yashika0724 Jan 27, 2026
f260fc5
fix: validate Linux spec early during create
Yashika0724 Jan 31, 2026
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10 changes: 7 additions & 3 deletions pkg/unikontainers/unikontainers.go
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Original file line number Diff line number Diff line change
Expand Up @@ -71,6 +71,10 @@ func New(bundlePath string, containerID string, rootDir string, cfg *UruncConfig
return nil, err
}

if spec.Linux == nil {
return nil, fmt.Errorf("Linux platform is required for urunc containers")
}

containerName := spec.Annotations["io.kubernetes.cri.container-name"]
if containerName == "queue-proxy" {
uniklog.Warn("This is a queue-proxy container. Adding IP env.")
Expand Down Expand Up @@ -260,7 +264,7 @@ func (u *Unikontainer) Exec(metrics m.Writer) error {

// ExecArgs
// If memory limit is set in spec, use it instead of the config default value
if u.Spec.Linux.Resources.Memory != nil {
if u.Spec.Linux.Resources != nil && u.Spec.Linux.Resources.Memory != nil {
if u.Spec.Linux.Resources.Memory.Limit != nil {
if *u.Spec.Linux.Resources.Memory.Limit > 0 {
vmmArgs.MemSizeB = uint64(*u.Spec.Linux.Resources.Memory.Limit) // nolint:gosec
Expand Down Expand Up @@ -454,10 +458,10 @@ func (u *Unikontainer) Exec(metrics m.Writer) error {
vmmArgs.Command = unikernelCmd

// pivot
_, err = findNS(u.Spec.Linux.Namespaces, specs.MountNamespace)
// We just want to check if a mount namespace was define din the list
// We just want to check if a mount namespace was defined in the list.
// Therefore, if there was no error and the mount namespace was found
// we can pivot.
_, err = findNS(u.Spec.Linux.Namespaces, specs.MountNamespace)
withPivot := err != nil
err = changeRoot(rootfsParams.MonRootfs, withPivot)
if err != nil {
Expand Down