tools/testing/selftests/bpf/verifier/unpriv.c

   1 {
   2         "unpriv: return pointer",
   3         .insns = {
   4         BPF_MOV64_REG(BPF_REG_0, BPF_REG_10),
   5         BPF_EXIT_INSN(),
   6         },
   7         .result = ACCEPT,
   8         .result_unpriv = REJECT,
   9         .errstr_unpriv = "R0 leaks addr",
  10         .retval = POINTER_VALUE,
  11 },
  12 {
  13         "unpriv: add const to pointer",
  14         .insns = {
  15         BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 8),
  16         BPF_MOV64_IMM(BPF_REG_0, 0),
  17         BPF_EXIT_INSN(),
  18         },
  19         .result = ACCEPT,
  20 },
  21 {
  22         "unpriv: add pointer to pointer",
  23         .insns = {
  24         BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_10),
  25         BPF_MOV64_IMM(BPF_REG_0, 0),
  26         BPF_EXIT_INSN(),
  27         },
  28         .result = REJECT,
  29         .errstr = "R1 pointer += pointer",
  30 },
  31 {
  32         "unpriv: neg pointer",
  33         .insns = {
  34         BPF_ALU64_IMM(BPF_NEG, BPF_REG_1, 0),
  35         BPF_MOV64_IMM(BPF_REG_0, 0),
  36         BPF_EXIT_INSN(),
  37         },
  38         .result = ACCEPT,
  39         .result_unpriv = REJECT,
  40         .errstr_unpriv = "R1 pointer arithmetic",
  41 },
  42 {
  43         "unpriv: cmp pointer with const",
  44         .insns = {
  45         BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 0),
  46         BPF_MOV64_IMM(BPF_REG_0, 0),
  47         BPF_EXIT_INSN(),
  48         },
  49         .result = ACCEPT,
  50         .result_unpriv = REJECT,
  51         .errstr_unpriv = "R1 pointer comparison",
  52 },
  53 {
  54         "unpriv: cmp pointer with pointer",
  55         .insns = {
  56         BPF_JMP_REG(BPF_JEQ, BPF_REG_1, BPF_REG_10, 0),
  57         BPF_MOV64_IMM(BPF_REG_0, 0),
  58         BPF_EXIT_INSN(),
  59         },
  60         .result = ACCEPT,
  61         .result_unpriv = REJECT,
  62         .errstr_unpriv = "R10 pointer comparison",
  63 },
  64 {
  65         "unpriv: check that printk is disallowed",
  66         .insns = {
  67         BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
  68         BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
  69         BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -8),
  70         BPF_MOV64_IMM(BPF_REG_2, 8),
  71         BPF_MOV64_REG(BPF_REG_3, BPF_REG_1),
  72         BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_trace_printk),
  73         BPF_MOV64_IMM(BPF_REG_0, 0),
  74         BPF_EXIT_INSN(),
  75         },
  76         .errstr_unpriv = "unknown func bpf_trace_printk#6",
  77         .result_unpriv = REJECT,
  78         .result = ACCEPT,
  79         .prog_type = BPF_PROG_TYPE_TRACEPOINT,
  80 },
  81 {
  82         "unpriv: pass pointer to helper function",
  83         .insns = {
  84         BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
  85         BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
  86         BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
  87         BPF_LD_MAP_FD(BPF_REG_1, 0),
  88         BPF_MOV64_REG(BPF_REG_3, BPF_REG_2),
  89         BPF_MOV64_REG(BPF_REG_4, BPF_REG_2),
  90         BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_update_elem),
  91         BPF_MOV64_IMM(BPF_REG_0, 0),
  92         BPF_EXIT_INSN(),
  93         },
  94         .fixup_map_hash_8b = { 3 },
  95         .errstr_unpriv = "R4 leaks addr",
  96         .result_unpriv = REJECT,
  97         .result = ACCEPT,
  98 },
  99 {
 100         "unpriv: indirectly pass pointer on stack to helper function",
 101         .insns = {
 102         BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_10, -8),
 103         BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
 104         BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
 105         BPF_LD_MAP_FD(BPF_REG_1, 0),
 106         BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
 107         BPF_MOV64_IMM(BPF_REG_0, 0),
 108         BPF_EXIT_INSN(),
 109         },
 110         .fixup_map_hash_8b = { 3 },
 111         .errstr = "invalid indirect read from stack off -8+0 size 8",
 112         .result = REJECT,
 113 },
 114 {
 115         "unpriv: mangle pointer on stack 1",
 116         .insns = {
 117         BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_10, -8),
 118         BPF_ST_MEM(BPF_W, BPF_REG_10, -8, 0),
 119         BPF_MOV64_IMM(BPF_REG_0, 0),
 120         BPF_EXIT_INSN(),
 121         },
 122         .errstr_unpriv = "attempt to corrupt spilled",
 123         .result_unpriv = REJECT,
 124         .result = ACCEPT,
 125 },
 126 {
 127         "unpriv: mangle pointer on stack 2",
 128         .insns = {
 129         BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_10, -8),
 130         BPF_ST_MEM(BPF_B, BPF_REG_10, -1, 0),
 131         BPF_MOV64_IMM(BPF_REG_0, 0),
 132         BPF_EXIT_INSN(),
 133         },
 134         .errstr_unpriv = "attempt to corrupt spilled",
 135         .result_unpriv = REJECT,
 136         .result = ACCEPT,
 137 },
 138 {
 139         "unpriv: read pointer from stack in small chunks",
 140         .insns = {
 141         BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_10, -8),
 142         BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_10, -8),
 143         BPF_MOV64_IMM(BPF_REG_0, 0),
 144         BPF_EXIT_INSN(),
 145         },
 146         .errstr = "invalid size",
 147         .result = REJECT,
 148 },
 149 {
 150         "unpriv: write pointer into ctx",
 151         .insns = {
 152         BPF_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_1, 0),
 153         BPF_MOV64_IMM(BPF_REG_0, 0),
 154         BPF_EXIT_INSN(),
 155         },
 156         .errstr_unpriv = "R1 leaks addr",
 157         .result_unpriv = REJECT,
 158         .errstr = "invalid bpf_context access",
 159         .result = REJECT,
 160 },
 161 {
 162         "unpriv: spill/fill of ctx",
 163         .insns = {
 164         BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10),
 165         BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8),
 166         BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0),
 167         BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_6, 0),
 168         BPF_MOV64_IMM(BPF_REG_0, 0),
 169         BPF_EXIT_INSN(),
 170         },
 171         .result = ACCEPT,
 172 },
 173 {
 174         "unpriv: spill/fill of ctx 2",
 175         .insns = {
 176         BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10),
 177         BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8),
 178         BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0),
 179         BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_6, 0),
 180         BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_get_hash_recalc),
 181         BPF_MOV64_IMM(BPF_REG_0, 0),
 182         BPF_EXIT_INSN(),
 183         },
 184         .result = ACCEPT,
 185         .prog_type = BPF_PROG_TYPE_SCHED_CLS,
 186 },
 187 {
 188         "unpriv: spill/fill of ctx 3",
 189         .insns = {
 190         BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10),
 191         BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8),
 192         BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0),
 193         BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_10, 0),
 194         BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_6, 0),
 195         BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_get_hash_recalc),
 196         BPF_EXIT_INSN(),
 197         },
 198         .result = REJECT,
 199         .errstr = "R1 type=fp expected=ctx",
 200         .prog_type = BPF_PROG_TYPE_SCHED_CLS,
 201 },
 202 {
 203         "unpriv: spill/fill of ctx 4",
 204         .insns = {
 205         BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10),
 206         BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8),
 207         BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0),
 208         BPF_MOV64_IMM(BPF_REG_0, 1),
 209         BPF_RAW_INSN(BPF_STX | BPF_XADD | BPF_DW, BPF_REG_10, BPF_REG_0, -8, 0),
 210         BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_6, 0),
 211         BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_get_hash_recalc),
 212         BPF_EXIT_INSN(),
 213         },
 214         .result = REJECT,
 215         .errstr = "R1 type=inv expected=ctx",
 216         .prog_type = BPF_PROG_TYPE_SCHED_CLS,
 217 },
 218 {
 219         "unpriv: spill/fill of different pointers stx",
 220         .insns = {
 221         BPF_MOV64_IMM(BPF_REG_3, 42),
 222         BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10),
 223         BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8),
 224         BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 3),
 225         BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
 226         BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -16),
 227         BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_2, 0),
 228         BPF_JMP_IMM(BPF_JNE, BPF_REG_1, 0, 1),
 229         BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0),
 230         BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_6, 0),
 231         BPF_STX_MEM(BPF_W, BPF_REG_1, BPF_REG_3,
 232                     offsetof(struct __sk_buff, mark)),
 233         BPF_MOV64_IMM(BPF_REG_0, 0),
 234         BPF_EXIT_INSN(),
 235         },
 236         .result = REJECT,
 237         .errstr = "same insn cannot be used with different pointers",
 238         .prog_type = BPF_PROG_TYPE_SCHED_CLS,
 239 },
 240 {
 241         "unpriv: spill/fill of different pointers stx - ctx and sock",
 242         .insns = {
 243         BPF_MOV64_REG(BPF_REG_8, BPF_REG_1),
 244         /* struct bpf_sock *sock = bpf_sock_lookup(...); */
 245         BPF_SK_LOOKUP(sk_lookup_tcp),
 246         BPF_MOV64_REG(BPF_REG_2, BPF_REG_0),
 247         /* u64 foo; */
 248         /* void *target = &foo; */
 249         BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10),
 250         BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8),
 251         BPF_MOV64_REG(BPF_REG_1, BPF_REG_8),
 252         /* if (skb == NULL) *target = sock; */
 253         BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 1),
 254                 BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_2, 0),
 255         /* else *target = skb; */
 256         BPF_JMP_IMM(BPF_JNE, BPF_REG_1, 0, 1),
 257                 BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0),
 258         /* struct __sk_buff *skb = *target; */
 259         BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_6, 0),
 260         /* skb->mark = 42; */
 261         BPF_MOV64_IMM(BPF_REG_3, 42),
 262         BPF_STX_MEM(BPF_W, BPF_REG_1, BPF_REG_3,
 263                     offsetof(struct __sk_buff, mark)),
 264         /* if (sk) bpf_sk_release(sk) */
 265         BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 1),
 266                 BPF_EMIT_CALL(BPF_FUNC_sk_release),
 267         BPF_MOV64_IMM(BPF_REG_0, 0),
 268         BPF_EXIT_INSN(),
 269         },
 270         .result = REJECT,
 271         .errstr = "type=ctx expected=sock",
 272         .prog_type = BPF_PROG_TYPE_SCHED_CLS,
 273 },
 274 {
 275         "unpriv: spill/fill of different pointers stx - leak sock",
 276         .insns = {
 277         BPF_MOV64_REG(BPF_REG_8, BPF_REG_1),
 278         /* struct bpf_sock *sock = bpf_sock_lookup(...); */
 279         BPF_SK_LOOKUP(sk_lookup_tcp),
 280         BPF_MOV64_REG(BPF_REG_2, BPF_REG_0),
 281         /* u64 foo; */
 282         /* void *target = &foo; */
 283         BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10),
 284         BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8),
 285         BPF_MOV64_REG(BPF_REG_1, BPF_REG_8),
 286         /* if (skb == NULL) *target = sock; */
 287         BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 1),
 288                 BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_2, 0),
 289         /* else *target = skb; */
 290         BPF_JMP_IMM(BPF_JNE, BPF_REG_1, 0, 1),
 291                 BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0),
 292         /* struct __sk_buff *skb = *target; */
 293         BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_6, 0),
 294         /* skb->mark = 42; */
 295         BPF_MOV64_IMM(BPF_REG_3, 42),
 296         BPF_STX_MEM(BPF_W, BPF_REG_1, BPF_REG_3,
 297                     offsetof(struct __sk_buff, mark)),
 298         BPF_EXIT_INSN(),
 299         },
 300         .result = REJECT,
 301         //.errstr = "same insn cannot be used with different pointers",
 302         .errstr = "Unreleased reference",
 303         .prog_type = BPF_PROG_TYPE_SCHED_CLS,
 304 },
 305 {
 306         "unpriv: spill/fill of different pointers stx - sock and ctx (read)",
 307         .insns = {
 308         BPF_MOV64_REG(BPF_REG_8, BPF_REG_1),
 309         /* struct bpf_sock *sock = bpf_sock_lookup(...); */
 310         BPF_SK_LOOKUP(sk_lookup_tcp),
 311         BPF_MOV64_REG(BPF_REG_2, BPF_REG_0),
 312         /* u64 foo; */
 313         /* void *target = &foo; */
 314         BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10),
 315         BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8),
 316         BPF_MOV64_REG(BPF_REG_1, BPF_REG_8),
 317         /* if (skb) *target = skb */
 318         BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 1),
 319                 BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0),
 320         /* else *target = sock */
 321         BPF_JMP_IMM(BPF_JNE, BPF_REG_1, 0, 1),
 322                 BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_2, 0),
 323         /* struct bpf_sock *sk = *target; */
 324         BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_6, 0),
 325         /* if (sk) u32 foo = sk->mark; bpf_sk_release(sk); */
 326         BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 2),
 327                 BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1,
 328                             offsetof(struct bpf_sock, mark)),
 329                 BPF_EMIT_CALL(BPF_FUNC_sk_release),
 330         BPF_MOV64_IMM(BPF_REG_0, 0),
 331         BPF_EXIT_INSN(),
 332         },
 333         .result = REJECT,
 334         .errstr = "same insn cannot be used with different pointers",
 335         .prog_type = BPF_PROG_TYPE_SCHED_CLS,
 336 },
 337 {
 338         "unpriv: spill/fill of different pointers stx - sock and ctx (write)",
 339         .insns = {
 340         BPF_MOV64_REG(BPF_REG_8, BPF_REG_1),
 341         /* struct bpf_sock *sock = bpf_sock_lookup(...); */
 342         BPF_SK_LOOKUP(sk_lookup_tcp),
 343         BPF_MOV64_REG(BPF_REG_2, BPF_REG_0),
 344         /* u64 foo; */
 345         /* void *target = &foo; */
 346         BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10),
 347         BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8),
 348         BPF_MOV64_REG(BPF_REG_1, BPF_REG_8),
 349         /* if (skb) *target = skb */
 350         BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 1),
 351                 BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0),
 352         /* else *target = sock */
 353         BPF_JMP_IMM(BPF_JNE, BPF_REG_1, 0, 1),
 354                 BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_2, 0),
 355         /* struct bpf_sock *sk = *target; */
 356         BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_6, 0),
 357         /* if (sk) sk->mark = 42; bpf_sk_release(sk); */
 358         BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 3),
 359                 BPF_MOV64_IMM(BPF_REG_3, 42),
 360                 BPF_STX_MEM(BPF_W, BPF_REG_1, BPF_REG_3,
 361                             offsetof(struct bpf_sock, mark)),
 362                 BPF_EMIT_CALL(BPF_FUNC_sk_release),
 363         BPF_MOV64_IMM(BPF_REG_0, 0),
 364         BPF_EXIT_INSN(),
 365         },
 366         .result = REJECT,
 367         //.errstr = "same insn cannot be used with different pointers",
 368         .errstr = "cannot write into sock",
 369         .prog_type = BPF_PROG_TYPE_SCHED_CLS,
 370 },
 371 {
 372         "unpriv: spill/fill of different pointers ldx",
 373         .insns = {
 374         BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10),
 375         BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8),
 376         BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 3),
 377         BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
 378         BPF_ALU64_IMM(BPF_ADD, BPF_REG_2,
 379                       -(__s32)offsetof(struct bpf_perf_event_data,
 380                                        sample_period) - 8),
 381         BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_2, 0),
 382         BPF_JMP_IMM(BPF_JNE, BPF_REG_1, 0, 1),
 383         BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0),
 384         BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_6, 0),
 385         BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_1,
 386                     offsetof(struct bpf_perf_event_data, sample_period)),
 387         BPF_MOV64_IMM(BPF_REG_0, 0),
 388         BPF_EXIT_INSN(),
 389         },
 390         .result = REJECT,
 391         .errstr = "same insn cannot be used with different pointers",
 392         .prog_type = BPF_PROG_TYPE_PERF_EVENT,
 393 },
 394 {
 395         "unpriv: write pointer into map elem value",
 396         .insns = {
 397         BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
 398         BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
 399         BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
 400         BPF_LD_MAP_FD(BPF_REG_1, 0),
 401         BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
 402         BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 1),
 403         BPF_STX_MEM(BPF_DW, BPF_REG_0, BPF_REG_0, 0),
 404         BPF_EXIT_INSN(),
 405         },
 406         .fixup_map_hash_8b = { 3 },
 407         .errstr_unpriv = "R0 leaks addr",
 408         .result_unpriv = REJECT,
 409         .result = ACCEPT,
 410 },
 411 {
 412         "alu32: mov u32 const",
 413         .insns = {
 414         BPF_MOV32_IMM(BPF_REG_7, 0),
 415         BPF_ALU32_IMM(BPF_AND, BPF_REG_7, 1),
 416         BPF_MOV32_REG(BPF_REG_0, BPF_REG_7),
 417         BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 1),
 418         BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_7, 0),
 419         BPF_EXIT_INSN(),
 420         },
 421         .result = ACCEPT,
 422         .retval = 0,
 423 },
 424 {
 425         "unpriv: partial copy of pointer",
 426         .insns = {
 427         BPF_MOV32_REG(BPF_REG_1, BPF_REG_10),
 428         BPF_MOV64_IMM(BPF_REG_0, 0),
 429         BPF_EXIT_INSN(),
 430         },
 431         .errstr_unpriv = "R10 partial copy",
 432         .result_unpriv = REJECT,
 433         .result = ACCEPT,
 434 },
 435 {
 436         "unpriv: pass pointer to tail_call",
 437         .insns = {
 438         BPF_MOV64_REG(BPF_REG_3, BPF_REG_1),
 439         BPF_LD_MAP_FD(BPF_REG_2, 0),
 440         BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_tail_call),
 441         BPF_MOV64_IMM(BPF_REG_0, 0),
 442         BPF_EXIT_INSN(),
 443         },
 444         .fixup_prog1 = { 1 },
 445         .errstr_unpriv = "R3 leaks addr into helper",
 446         .result_unpriv = REJECT,
 447         .result = ACCEPT,
 448 },
 449 {
 450         "unpriv: cmp map pointer with zero",
 451         .insns = {
 452         BPF_MOV64_IMM(BPF_REG_1, 0),
 453         BPF_LD_MAP_FD(BPF_REG_1, 0),
 454         BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 0),
 455         BPF_MOV64_IMM(BPF_REG_0, 0),
 456         BPF_EXIT_INSN(),
 457         },
 458         .fixup_map_hash_8b = { 1 },
 459         .errstr_unpriv = "R1 pointer comparison",
 460         .result_unpriv = REJECT,
 461         .result = ACCEPT,
 462 },
 463 {
 464         "unpriv: write into frame pointer",
 465         .insns = {
 466         BPF_MOV64_REG(BPF_REG_10, BPF_REG_1),
 467         BPF_MOV64_IMM(BPF_REG_0, 0),
 468         BPF_EXIT_INSN(),
 469         },
 470         .errstr = "frame pointer is read only",
 471         .result = REJECT,
 472 },
 473 {
 474         "unpriv: spill/fill frame pointer",
 475         .insns = {
 476         BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10),
 477         BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8),
 478         BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_10, 0),
 479         BPF_LDX_MEM(BPF_DW, BPF_REG_10, BPF_REG_6, 0),
 480         BPF_MOV64_IMM(BPF_REG_0, 0),
 481         BPF_EXIT_INSN(),
 482         },
 483         .errstr = "frame pointer is read only",
 484         .result = REJECT,
 485 },
 486 {
 487         "unpriv: cmp of frame pointer",
 488         .insns = {
 489         BPF_JMP_IMM(BPF_JEQ, BPF_REG_10, 0, 0),
 490         BPF_MOV64_IMM(BPF_REG_0, 0),
 491         BPF_EXIT_INSN(),
 492         },
 493         .errstr_unpriv = "R10 pointer comparison",
 494         .result_unpriv = REJECT,
 495         .result = ACCEPT,
 496 },
 497 {
 498         "unpriv: adding of fp",
 499         .insns = {
 500         BPF_MOV64_IMM(BPF_REG_0, 0),
 501         BPF_MOV64_IMM(BPF_REG_1, 0),
 502         BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_10),
 503         BPF_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_0, -8),
 504         BPF_EXIT_INSN(),
 505         },
 506         .errstr_unpriv = "R1 stack pointer arithmetic goes out of range",
 507         .result_unpriv = REJECT,
 508         .result = ACCEPT,
 509 },
 510 {
 511         "unpriv: cmp of stack pointer",
 512         .insns = {
 513         BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
 514         BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
 515         BPF_JMP_IMM(BPF_JEQ, BPF_REG_2, 0, 0),
 516         BPF_MOV64_IMM(BPF_REG_0, 0),
 517         BPF_EXIT_INSN(),
 518         },
 519         .errstr_unpriv = "R2 pointer comparison",
 520         .result_unpriv = REJECT,
 521         .result = ACCEPT,
 522 },