| 1 | package host |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "fmt" |
| 6 | "os" |
| 7 | "strings" |
| 8 | "testing" |
| 9 | |
| 10 | "github.com/carlosframework/platform/internal/rootstate" |
| 11 | ) |
| 12 | |
| 13 | func TestPlan14OperatorUnitPredecessorStop(t *testing.T) { |
| 14 | for _, attack := range []string{"none", "invocation", "cgroup", "inode", "dropin", "fragment", "missing property", "child remains", "lost stop"} { |
| 15 | t.Run(attack, func(t *testing.T) { |
| 16 | b, in, _ := plan14UnitBindingFixture(t, "console.service", "", "") |
| 17 | binding, err := b.establish(t.Context(), in.Host) |
| 18 | if err != nil { |
| 19 | t.Fatal(err) |
| 20 | } |
| 21 | invocation, group, state := "original", "/system.slice/console.service", "active" |
| 22 | id := rootstate.FileIdentity{Device: 1, Inode: 2} |
| 23 | populated, stops := true, 0 |
| 24 | k := claimPredecessorKernel{group: func(string) (rootstate.FileIdentity, bool, error) { return id, populated, nil }} |
| 25 | k.ctl = func(_ context.Context, args ...string) (string, error) { |
| 26 | if args[0] == "stop" { |
| 27 | stops++ |
| 28 | state = "inactive" |
| 29 | if attack != "child remains" { |
| 30 | populated = false |
| 31 | } |
| 32 | if attack == "lost stop" { |
| 33 | return "", os.ErrInvalid |
| 34 | } |
| 35 | return "", nil |
| 36 | } |
| 37 | out := fmt.Sprintf("ActiveState=%s\nInvocationID=%s\nControlGroup=%s\nFragmentPath=/etc/systemd/system/console.service\nDropInPaths=", state, invocation, group) |
| 38 | switch attack { |
| 39 | case "dropin": |
| 40 | out += "/etc/systemd/system/console.service.d/override.conf" |
| 41 | case "fragment": |
| 42 | out = strings.ReplaceAll(out, "/etc/systemd/system", "/run/systemd/system") |
| 43 | case "missing property": |
| 44 | out = strings.ReplaceAll(out, "\nDropInPaths=", "") |
| 45 | } |
| 46 | return out, nil |
| 47 | } |
| 48 | p, err := k.capture(t.Context(), binding) |
| 49 | if attack == "dropin" || attack == "fragment" || attack == "missing property" { |
| 50 | if err == nil || stops != 0 { |
| 51 | t.Fatal("bad definition accepted", err) |
| 52 | } |
| 53 | return |
| 54 | } |
| 55 | if err != nil { |
| 56 | t.Fatal(err) |
| 57 | } |
| 58 | switch attack { |
| 59 | case "invocation": |
| 60 | invocation = "successor" |
| 61 | case "cgroup": |
| 62 | group = "/system.slice/sibling.service" |
| 63 | case "inode": |
| 64 | id.Inode++ |
| 65 | } |
| 66 | ctx, cancel := context.WithCancel(t.Context()) |
| 67 | if attack == "child remains" { |
| 68 | original := k.ctl |
| 69 | k.ctl = func(ctx context.Context, args ...string) (string, error) { |
| 70 | out, e := original(ctx, args...) |
| 71 | if args[0] == "stop" { |
| 72 | cancel() |
| 73 | } |
| 74 | return out, e |
| 75 | } |
| 76 | } |
| 77 | defer cancel() |
| 78 | err = k.stop(ctx, p) |
| 79 | if attack == "none" { |
| 80 | if err != nil || stops != 1 { |
| 81 | t.Fatal(err, stops) |
| 82 | } |
| 83 | if err = k.stop(t.Context(), p); err != nil || stops != 1 { |
| 84 | t.Fatal("stop replay", err, stops) |
| 85 | } |
| 86 | } else if err == nil { |
| 87 | t.Fatal("unsafe stop accepted") |
| 88 | } |
| 89 | if (attack == "invocation" || attack == "cgroup" || attack == "inode") && stops != 0 { |
| 90 | t.Fatal("stopped successor") |
| 91 | } |
| 92 | if attack == "lost stop" { |
| 93 | if err = k.stop(t.Context(), p); err != nil || stops != 1 { |
| 94 | t.Fatal("lost stop replay", err, stops) |
| 95 | } |
| 96 | } |
| 97 | }) |
| 98 | } |
| 99 | } |
| 100 | |
| 101 | func TestPlan14PredecessorDeviceAcrossBoot(t *testing.T) { |
| 102 | p := claimUnitPredecessor{Unit: "console.service", Invocation: "before", Group: "system.slice/console.service", GroupIdentity: rootstate.FileIdentity{Device: 1, Inode: 2}, Boot: "boot-before"} |
| 103 | state := "inactive" |
| 104 | calls := 0 |
| 105 | k := claimPredecessorKernel{ |
| 106 | boot: func() (string, error) { return "boot-after", nil }, |
| 107 | group: func(string) (rootstate.FileIdentity, bool, error) { |
| 108 | return rootstate.FileIdentity{Device: 8, Inode: 9}, state == "active", nil |
| 109 | }, |
| 110 | ctl: func(_ context.Context, args ...string) (string, error) { |
| 111 | if args[0] != "show" { |
| 112 | calls++ |
| 113 | return "", nil |
| 114 | } |
| 115 | return "ActiveState=" + state + "\nInvocationID=\nControlGroup=\nFragmentPath=/etc/systemd/system/console.service\nDropInPaths=\n", nil |
| 116 | }, |
| 117 | } |
| 118 | if err := k.stop(t.Context(), p); err != nil { |
| 119 | t.Fatal("old boot empty group refused", err) |
| 120 | } |
| 121 | state = "active" |
| 122 | if err := k.stop(t.Context(), p); err == nil { |
| 123 | t.Fatal("old boot authorized stopping new population") |
| 124 | } |
| 125 | if calls != 0 { |
| 126 | t.Fatal("systemctl stop crossed a boot") |
| 127 | } |
| 128 | } |
| 129 | |
amadan