| 1 | package cgroup |
| 2 | |
| 3 | import ( |
| 4 | "reflect" |
| 5 | "strings" |
| 6 | "testing" |
| 7 | ) |
| 8 | |
| 9 | func TestShimSpecRoundTripsExactBytes(t *testing.T) { |
| 10 | in := shimSpec{ |
| 11 | Path: "/run/carlos/exe/app", |
| 12 | Dir: "/data/app dir", |
| 13 | Argv: []string{"app", "", "two words", "line\nbreak", "--db", "/data/x.db"}, |
| 14 | Env: []string{"A=1", "EMPTY=", "EQ=a=b", "BAD=\xff\xfe", "BIG=" + strings.Repeat("x", 1<<20)}, |
| 15 | Expected: "/system.slice/carlos-edge.service/carlos-exec@a.example/g3", |
| 16 | KeepFDs: 5, |
| 17 | TestHold: 2, |
| 18 | SigIgn: 1<<0 | 1<<14 | 1<<63, |
| 19 | } |
| 20 | b, err := encodeShimSpec(in) |
| 21 | if err != nil { |
| 22 | t.Fatal(err) |
| 23 | } |
| 24 | out, err := decodeShimSpec(b) |
| 25 | if err != nil { |
| 26 | t.Fatal(err) |
| 27 | } |
| 28 | if !reflect.DeepEqual(in, out) { |
| 29 | t.Fatalf("round trip changed the spec") |
| 30 | } |
| 31 | } |
| 32 | |
| 33 | // An empty argv and env round-trip as empty, not as one empty string. |
| 34 | func TestShimSpecRoundTripsEmptyLists(t *testing.T) { |
| 35 | in := shimSpec{Path: "/x", Argv: []string{}, Env: []string{}, Expected: "/g", KeepFDs: 3} |
| 36 | b, err := encodeShimSpec(in) |
| 37 | if err != nil { |
| 38 | t.Fatal(err) |
| 39 | } |
| 40 | out, err := decodeShimSpec(b) |
| 41 | if err != nil { |
| 42 | t.Fatal(err) |
| 43 | } |
| 44 | if len(out.Argv) != 0 || len(out.Env) != 0 || out.Path != "/x" || out.Expected != "/g" || out.KeepFDs != 3 { |
| 45 | t.Fatalf("got %+v", out) |
| 46 | } |
| 47 | } |
| 48 | |
| 49 | func TestShimSpecRefusesNUL(t *testing.T) { |
| 50 | if _, err := encodeShimSpec(shimSpec{Path: "/x", Argv: []string{"a\x00b"}, Expected: "/g", KeepFDs: 3}); err == nil { |
| 51 | t.Fatal("a NUL inside argv was encoded") |
| 52 | } |
| 53 | if _, err := encodeShimSpec(shimSpec{Path: "/x", Env: []string{"A=\x00"}, Expected: "/g", KeepFDs: 3}); err == nil { |
| 54 | t.Fatal("a NUL inside env was encoded") |
| 55 | } |
| 56 | if _, err := encodeShimSpec(shimSpec{Path: "/x\x00y", Expected: "/g", KeepFDs: 3}); err == nil { |
| 57 | t.Fatal("a NUL inside the path was encoded") |
| 58 | } |
| 59 | } |
| 60 | |
| 61 | func TestShimSpecRefusesTruncatedAndTrailing(t *testing.T) { |
| 62 | b, _ := encodeShimSpec(shimSpec{Path: "/x", Argv: []string{"x"}, Env: []string{"A=1"}, Expected: "/g", KeepFDs: 3}) |
| 63 | for _, bad := range [][]byte{b[:len(b)-1], append(append([]byte{}, b...), 'z', 0), []byte("carlos-cgexec-0\x00")} { |
| 64 | if _, err := decodeShimSpec(bad); err == nil { |
| 65 | t.Fatalf("decoded a bad spec %q", bad) |
| 66 | } |
| 67 | } |
| 68 | } |
| 69 | |
| 70 | func TestShimSpecRefusesHugeCounts(t *testing.T) { |
| 71 | bad := []byte("carlos-cgexec-2\x00/x\x00\x00/g\x003\x000\x000\x001048577\x00") |
| 72 | if _, err := decodeShimSpec(bad); err == nil { |
| 73 | t.Fatal("decoded an argv count above 1<<20") |
| 74 | } |
| 75 | // The control: the same spec with a count in bounds decodes. |
| 76 | ok := []byte("carlos-cgexec-2\x00/x\x00\x00/g\x003\x000\x000\x000\x000\x00") |
| 77 | if _, err := decodeShimSpec(ok); err != nil { |
| 78 | t.Fatalf("the control spec: %v", err) |
| 79 | } |
| 80 | } |
| 81 | |
| 82 | // The ignored-signal set is a 64-bit number: a bad one, and a spec in the |
| 83 | // encoding before the set was added (magic carlos-cgexec-1), are refused. |
| 84 | func TestShimSpecRefusesBadSigIgnAndTheOldEncoding(t *testing.T) { |
| 85 | for _, bad := range []string{ |
| 86 | "carlos-cgexec-2\x00/x\x00\x00/g\x003\x000\x00x\x000\x000\x00", |
| 87 | "carlos-cgexec-2\x00/x\x00\x00/g\x003\x000\x0018446744073709551616\x000\x000\x00", |
| 88 | "carlos-cgexec-2\x00/x\x00\x00/g\x003\x000\x00-1\x000\x000\x00", |
| 89 | "carlos-cgexec-1\x00/x\x00\x00/g\x003\x000\x000\x000\x00", |
| 90 | } { |
| 91 | if _, err := decodeShimSpec([]byte(bad)); err == nil { |
| 92 | t.Fatalf("decoded a bad spec %q", bad) |
| 93 | } |
| 94 | } |
| 95 | } |
| 96 | |
amadan