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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 | { "precise: test 1", .insns = { BPF_MOV64_IMM(BPF_REG_0, 1), BPF_LD_MAP_FD(BPF_REG_6, 0), BPF_MOV64_REG(BPF_REG_1, BPF_REG_6), BPF_MOV64_REG(BPF_REG_2, BPF_REG_FP), BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8), BPF_ST_MEM(BPF_DW, BPF_REG_FP, -8, 0), BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem), BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1), BPF_EXIT_INSN(), BPF_MOV64_REG(BPF_REG_9, BPF_REG_0), BPF_MOV64_REG(BPF_REG_1, BPF_REG_6), BPF_MOV64_REG(BPF_REG_2, BPF_REG_FP), BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8), BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem), BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1), BPF_EXIT_INSN(), BPF_MOV64_REG(BPF_REG_8, BPF_REG_0), BPF_ALU64_REG(BPF_SUB, BPF_REG_9, BPF_REG_8), /* map_value_ptr -= map_value_ptr */ BPF_MOV64_REG(BPF_REG_2, BPF_REG_9), BPF_JMP_IMM(BPF_JLT, BPF_REG_2, 8, 1), BPF_EXIT_INSN(), BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, 1), /* R2=scalar(umin=1, umax=8) */ BPF_MOV64_REG(BPF_REG_1, BPF_REG_FP), BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -8), BPF_MOV64_IMM(BPF_REG_3, 0), BPF_EMIT_CALL(BPF_FUNC_probe_read_kernel), BPF_EXIT_INSN(), }, .prog_type = BPF_PROG_TYPE_TRACEPOINT, .fixup_map_array_48b = { 1 }, .result = VERBOSE_ACCEPT, .errstr = "mark_precise: frame0: last_idx 26 first_idx 20\ mark_precise: frame0: regs=r2 stack= before 25\ mark_precise: frame0: regs=r2 stack= before 24\ mark_precise: frame0: regs=r2 stack= before 23\ mark_precise: frame0: regs=r2 stack= before 22\ mark_precise: frame0: regs=r2 stack= before 20\ mark_precise: frame0: parent state regs=r2 stack=:\ mark_precise: frame0: last_idx 19 first_idx 10\ mark_precise: frame0: regs=r2,r9 stack= before 19\ mark_precise: frame0: regs=r9 stack= before 18\ mark_precise: frame0: regs=r8,r9 stack= before 17\ mark_precise: frame0: regs=r0,r9 stack= before 15\ mark_precise: frame0: regs=r0,r9 stack= before 14\ mark_precise: frame0: regs=r9 stack= before 13\ mark_precise: frame0: regs=r9 stack= before 12\ mark_precise: frame0: regs=r9 stack= before 11\ mark_precise: frame0: regs=r9 stack= before 10\ mark_precise: frame0: parent state regs= stack=:", }, { "precise: test 2", .insns = { BPF_MOV64_IMM(BPF_REG_0, 1), BPF_LD_MAP_FD(BPF_REG_6, 0), BPF_MOV64_REG(BPF_REG_1, BPF_REG_6), BPF_MOV64_REG(BPF_REG_2, BPF_REG_FP), BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8), BPF_ST_MEM(BPF_DW, BPF_REG_FP, -8, 0), BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem), BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1), BPF_EXIT_INSN(), BPF_MOV64_REG(BPF_REG_9, BPF_REG_0), BPF_MOV64_REG(BPF_REG_1, BPF_REG_6), BPF_MOV64_REG(BPF_REG_2, BPF_REG_FP), BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8), BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem), BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1), BPF_EXIT_INSN(), BPF_MOV64_REG(BPF_REG_8, BPF_REG_0), BPF_ALU64_REG(BPF_SUB, BPF_REG_9, BPF_REG_8), /* map_value_ptr -= map_value_ptr */ BPF_MOV64_REG(BPF_REG_2, BPF_REG_9), BPF_JMP_IMM(BPF_JLT, BPF_REG_2, 8, 1), BPF_EXIT_INSN(), BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, 1), /* R2=scalar(umin=1, umax=8) */ BPF_MOV64_REG(BPF_REG_1, BPF_REG_FP), BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -8), BPF_MOV64_IMM(BPF_REG_3, 0), BPF_EMIT_CALL(BPF_FUNC_probe_read_kernel), BPF_EXIT_INSN(), }, .prog_type = BPF_PROG_TYPE_TRACEPOINT, .fixup_map_array_48b = { 1 }, .result = VERBOSE_ACCEPT, .flags = BPF_F_TEST_STATE_FREQ, .errstr = "26: (85) call bpf_probe_read_kernel#113\ mark_precise: frame0: last_idx 26 first_idx 22\ mark_precise: frame0: regs=r2 stack= before 25\ mark_precise: frame0: regs=r2 stack= before 24\ mark_precise: frame0: regs=r2 stack= before 23\ mark_precise: frame0: regs=r2 stack= before 22\ mark_precise: frame0: parent state regs=r2 stack=:\ mark_precise: frame0: last_idx 20 first_idx 20\ mark_precise: frame0: regs=r2,r9 stack= before 20\ mark_precise: frame0: parent state regs=r2,r9 stack=:\ mark_precise: frame0: last_idx 19 first_idx 17\ mark_precise: frame0: regs=r2,r9 stack= before 19\ mark_precise: frame0: regs=r9 stack= before 18\ mark_precise: frame0: regs=r8,r9 stack= before 17\ mark_precise: frame0: parent state regs= stack=:", }, { "precise: cross frame pruning", .insns = { BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_get_prandom_u32), BPF_MOV64_IMM(BPF_REG_8, 0), BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1), BPF_MOV64_IMM(BPF_REG_8, 1), BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_get_prandom_u32), BPF_MOV64_IMM(BPF_REG_9, 0), BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1), BPF_MOV64_IMM(BPF_REG_9, 1), BPF_MOV64_REG(BPF_REG_1, BPF_REG_0), BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 4), BPF_JMP_IMM(BPF_JEQ, BPF_REG_8, 1, 1), BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_2, 0), BPF_MOV64_IMM(BPF_REG_0, 0), BPF_EXIT_INSN(), BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 0), BPF_EXIT_INSN(), }, .prog_type = BPF_PROG_TYPE_XDP, .flags = BPF_F_TEST_STATE_FREQ, .errstr = "!read_ok", .result = REJECT, }, { "precise: ST zero to stack insn is supported", .insns = { BPF_MOV64_REG(BPF_REG_3, BPF_REG_10), BPF_JMP_IMM(BPF_JNE, BPF_REG_3, 123, 0), /* not a register spill, so we stop precision propagation for R4 here */ BPF_ST_MEM(BPF_DW, BPF_REG_3, -8, 0), BPF_LDX_MEM(BPF_DW, BPF_REG_4, BPF_REG_10, -8), BPF_MOV64_IMM(BPF_REG_0, -1), BPF_JMP_REG(BPF_JGT, BPF_REG_4, BPF_REG_0, 0), BPF_EXIT_INSN(), }, .prog_type = BPF_PROG_TYPE_XDP, .flags = BPF_F_TEST_STATE_FREQ, .errstr = "mark_precise: frame0: last_idx 5 first_idx 5\ mark_precise: frame0: parent state regs=r4 stack=:\ mark_precise: frame0: last_idx 4 first_idx 2\ mark_precise: frame0: regs=r4 stack= before 4\ mark_precise: frame0: regs=r4 stack= before 3\ mark_precise: frame0: last_idx 5 first_idx 5\ mark_precise: frame0: parent state regs=r0 stack=:\ mark_precise: frame0: last_idx 4 first_idx 2\ mark_precise: frame0: regs=r0 stack= before 4\ 5: R0=-1 R4=0", .result = VERBOSE_ACCEPT, .retval = -1, }, { "precise: STX insn causing spi > allocated_stack", .insns = { BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_get_prandom_u32), /* make later reg spill more interesting by having somewhat known scalar */ BPF_ALU64_IMM(BPF_AND, BPF_REG_0, 0xff), BPF_MOV64_REG(BPF_REG_3, BPF_REG_10), BPF_JMP_IMM(BPF_JNE, BPF_REG_3, 123, 0), BPF_STX_MEM(BPF_DW, BPF_REG_3, BPF_REG_0, -8), BPF_LDX_MEM(BPF_DW, BPF_REG_4, BPF_REG_10, -8), BPF_MOV64_IMM(BPF_REG_0, -1), BPF_JMP_REG(BPF_JGT, BPF_REG_4, BPF_REG_0, 0), BPF_EXIT_INSN(), }, .prog_type = BPF_PROG_TYPE_XDP, .flags = BPF_F_TEST_STATE_FREQ, .errstr = "mark_precise: frame0: last_idx 7 first_idx 7\ mark_precise: frame0: parent state regs=r4 stack=-8:\ mark_precise: frame0: last_idx 6 first_idx 4\ mark_precise: frame0: regs=r4 stack=-8 before 6: (b7) r0 = -1\ mark_precise: frame0: regs=r4 stack=-8 before 5: (79) r4 = *(u64 *)(r10 -8)\ mark_precise: frame0: regs= stack=-8 before 4: (7b) *(u64 *)(r3 -8) = r0\ mark_precise: frame0: parent state regs=r0 stack=:\ mark_precise: frame0: last_idx 3 first_idx 3\ mark_precise: frame0: regs=r0 stack= before 3: (55) if r3 != 0x7b goto pc+0\ mark_precise: frame0: regs=r0 stack= before 2: (bf) r3 = r10\ mark_precise: frame0: regs=r0 stack= before 1: (57) r0 &= 255\ mark_precise: frame0: parent state regs=r0 stack=:\ mark_precise: frame0: last_idx 0 first_idx 0\ mark_precise: frame0: regs=r0 stack= before 0: (85) call bpf_get_prandom_u32#7\ mark_precise: frame0: last_idx 7 first_idx 7\ mark_precise: frame0: parent state regs= stack=:", .result = VERBOSE_ACCEPT, .retval = -1, }, { "precise: mark_chain_precision for ARG_CONST_ALLOC_SIZE_OR_ZERO", .insns = { BPF_LDX_MEM(BPF_W, BPF_REG_4, BPF_REG_1, offsetof(struct xdp_md, ingress_ifindex)), BPF_LD_MAP_FD(BPF_REG_6, 0), BPF_MOV64_REG(BPF_REG_1, BPF_REG_6), BPF_MOV64_IMM(BPF_REG_2, 1), BPF_MOV64_IMM(BPF_REG_3, 0), BPF_JMP_IMM(BPF_JEQ, BPF_REG_4, 0, 1), BPF_MOV64_IMM(BPF_REG_2, 0x1000), BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_ringbuf_reserve), BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1), BPF_EXIT_INSN(), BPF_MOV64_REG(BPF_REG_1, BPF_REG_0), BPF_LDX_MEM(BPF_DW, BPF_REG_2, BPF_REG_0, 42), BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_ringbuf_submit), BPF_MOV64_IMM(BPF_REG_0, 0), BPF_EXIT_INSN(), }, .fixup_map_ringbuf = { 1 }, .prog_type = BPF_PROG_TYPE_XDP, .flags = BPF_F_TEST_STATE_FREQ | F_NEEDS_EFFICIENT_UNALIGNED_ACCESS, .errstr = "invalid access to memory, mem_size=1 off=42 size=8", .result = REJECT, }, { "precise: program doesn't prematurely prune branches", .insns = { BPF_ALU64_IMM(BPF_MOV, BPF_REG_6, 0x400), BPF_ALU64_IMM(BPF_MOV, BPF_REG_7, 0), BPF_ALU64_IMM(BPF_MOV, BPF_REG_8, 0), BPF_ALU64_IMM(BPF_MOV, BPF_REG_9, 0x80000000), BPF_ALU64_IMM(BPF_MOD, BPF_REG_6, 0x401), BPF_JMP_IMM(BPF_JA, 0, 0, 0), BPF_JMP_REG(BPF_JLE, BPF_REG_6, BPF_REG_9, 2), BPF_ALU64_IMM(BPF_MOD, BPF_REG_6, 1), BPF_ALU64_IMM(BPF_MOV, BPF_REG_9, 0), BPF_JMP_REG(BPF_JLE, BPF_REG_6, BPF_REG_9, 1), BPF_ALU64_IMM(BPF_MOV, BPF_REG_6, 0), BPF_ALU64_IMM(BPF_MOV, BPF_REG_0, 0), BPF_STX_MEM(BPF_W, BPF_REG_10, BPF_REG_0, -4), BPF_LD_MAP_FD(BPF_REG_4, 0), BPF_ALU64_REG(BPF_MOV, BPF_REG_1, BPF_REG_4), BPF_ALU64_REG(BPF_MOV, BPF_REG_2, BPF_REG_10), BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -4), BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem), BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1), BPF_EXIT_INSN(), BPF_ALU64_IMM(BPF_RSH, BPF_REG_6, 10), BPF_ALU64_IMM(BPF_MUL, BPF_REG_6, 8192), BPF_ALU64_REG(BPF_MOV, BPF_REG_1, BPF_REG_0), BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_6), BPF_LDX_MEM(BPF_DW, BPF_REG_3, BPF_REG_0, 0), BPF_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_3, 0), BPF_EXIT_INSN(), }, .fixup_map_array_48b = { 13 }, .prog_type = BPF_PROG_TYPE_XDP, .result = REJECT, .errstr = "register with unbounded min value is not allowed", }, |