| 1 | //go:build linux |
| 2 | |
| 3 | package host |
| 4 | |
| 5 | import ( |
| 6 | "os" |
| 7 | "path/filepath" |
| 8 | "testing" |
| 9 | ) |
| 10 | |
| 11 | func TestClaimMaskFilesystemCreateRefusesSymlinkParent(t *testing.T) { |
| 12 | var calls []string |
| 13 | plan9Fix2Systemctl(t, "enabled", &calls) |
| 14 | plan9Fix2MaskOwner(t) |
| 15 | root := t.TempDir() |
| 16 | victim := filepath.Join(root, "victim") |
| 17 | if err := os.Mkdir(victim, 0700); err != nil { |
| 18 | t.Fatal(err) |
| 19 | } |
| 20 | link := filepath.Join(root, "link") |
| 21 | if err := os.Symlink(victim, link); err != nil { |
| 22 | t.Fatal(err) |
| 23 | } |
| 24 | claimEdgeRuntimeMask = filepath.Join(link, "carlos-edge.service") |
| 25 | if _, err := createClaimEdgeMask(t.Context(), plan9Fix2Boot(t)); err == nil { |
| 26 | t.Error("created mask through symlink parent") |
| 27 | } |
| 28 | entries, err := os.ReadDir(victim) |
| 29 | if err != nil || len(entries) != 0 { |
| 30 | t.Fatalf("changed victim directory: %v, %v", entries, err) |
| 31 | } |
| 32 | } |
| 33 | |
| 34 | func TestClaimMaskFilesystemDiscardRefusesSymlinkParent(t *testing.T) { |
| 35 | old := claimEdgeMaskOwner |
| 36 | t.Cleanup(func() { claimEdgeMaskOwner = old }) |
| 37 | root := t.TempDir() |
| 38 | victim := filepath.Join(root, "victim") |
| 39 | if err := os.Mkdir(victim, 0700); err != nil { |
| 40 | t.Fatal(err) |
| 41 | } |
| 42 | path := filepath.Join(victim, "edge-mask") |
| 43 | if err := os.WriteFile(path, []byte("victim"), 0600); err != nil { |
| 44 | t.Fatal(err) |
| 45 | } |
| 46 | link := filepath.Join(root, "link") |
| 47 | if err := os.Symlink(victim, link); err != nil { |
| 48 | t.Fatal(err) |
| 49 | } |
| 50 | claimEdgeMaskOwner = filepath.Join(link, "edge-mask") |
| 51 | if err := discardClaimEdgeMaskRecord(claimEdgeMaskRecord{}, false); err == nil { |
| 52 | t.Error("discard accepted symlink parent") |
| 53 | } |
| 54 | raw, err := os.ReadFile(path) |
| 55 | if err != nil || string(raw) != "victim" { |
| 56 | t.Fatalf("changed victim record: %q, %v", raw, err) |
| 57 | } |
| 58 | } |
| 59 | |
amadan