88 lines
2.9 KiB
C
88 lines
2.9 KiB
C
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{
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"bpf_get_stack return R0 within range",
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.insns = {
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BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
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BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
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BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
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BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
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BPF_LD_MAP_FD(BPF_REG_1, 0),
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BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 28),
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BPF_MOV64_REG(BPF_REG_7, BPF_REG_0),
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BPF_MOV64_IMM(BPF_REG_9, sizeof(struct test_val)/2),
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BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
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BPF_MOV64_REG(BPF_REG_2, BPF_REG_7),
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BPF_MOV64_IMM(BPF_REG_3, sizeof(struct test_val)/2),
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BPF_MOV64_IMM(BPF_REG_4, 256),
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BPF_EMIT_CALL(BPF_FUNC_get_stack),
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BPF_MOV64_IMM(BPF_REG_1, 0),
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BPF_MOV64_REG(BPF_REG_8, BPF_REG_0),
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BPF_ALU64_IMM(BPF_LSH, BPF_REG_8, 32),
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BPF_ALU64_IMM(BPF_ARSH, BPF_REG_8, 32),
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BPF_JMP_REG(BPF_JSGT, BPF_REG_1, BPF_REG_8, 16),
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BPF_ALU64_REG(BPF_SUB, BPF_REG_9, BPF_REG_8),
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BPF_MOV64_REG(BPF_REG_2, BPF_REG_7),
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BPF_ALU64_REG(BPF_ADD, BPF_REG_2, BPF_REG_8),
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BPF_MOV64_REG(BPF_REG_1, BPF_REG_9),
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BPF_ALU64_IMM(BPF_LSH, BPF_REG_1, 32),
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BPF_ALU64_IMM(BPF_ARSH, BPF_REG_1, 32),
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BPF_MOV64_REG(BPF_REG_3, BPF_REG_2),
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BPF_ALU64_REG(BPF_ADD, BPF_REG_3, BPF_REG_1),
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BPF_MOV64_REG(BPF_REG_1, BPF_REG_7),
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BPF_MOV64_IMM(BPF_REG_5, sizeof(struct test_val)/2),
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BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_5),
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BPF_JMP_REG(BPF_JGE, BPF_REG_3, BPF_REG_1, 4),
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BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
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BPF_MOV64_REG(BPF_REG_3, BPF_REG_9),
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BPF_MOV64_IMM(BPF_REG_4, 0),
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BPF_EMIT_CALL(BPF_FUNC_get_stack),
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BPF_EXIT_INSN(),
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},
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.fixup_map_hash_48b = { 4 },
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.result = ACCEPT,
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.prog_type = BPF_PROG_TYPE_TRACEPOINT,
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},
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{
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"bpf_get_task_stack return R0 range is refined",
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.insns = {
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BPF_LDX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0),
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BPF_LDX_MEM(BPF_DW, BPF_REG_6, BPF_REG_6, 0), // ctx->meta->seq
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BPF_LDX_MEM(BPF_DW, BPF_REG_7, BPF_REG_1, 8), // ctx->task
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BPF_LD_MAP_FD(BPF_REG_1, 0), // fixup_map_array_48b
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BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
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BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
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BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
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BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
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BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 2),
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_EXIT_INSN(),
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BPF_JMP_IMM(BPF_JNE, BPF_REG_7, 0, 2),
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_EXIT_INSN(),
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BPF_MOV64_REG(BPF_REG_1, BPF_REG_7),
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BPF_MOV64_REG(BPF_REG_2, BPF_REG_0),
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BPF_MOV64_REG(BPF_REG_9, BPF_REG_0), // keep buf for seq_write
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BPF_MOV64_IMM(BPF_REG_3, 48),
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BPF_MOV64_IMM(BPF_REG_4, 0),
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BPF_EMIT_CALL(BPF_FUNC_get_task_stack),
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BPF_JMP_IMM(BPF_JSGT, BPF_REG_0, 0, 2),
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_EXIT_INSN(),
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BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
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BPF_MOV64_REG(BPF_REG_2, BPF_REG_9),
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BPF_MOV64_REG(BPF_REG_3, BPF_REG_0),
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BPF_EMIT_CALL(BPF_FUNC_seq_write),
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_EXIT_INSN(),
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},
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.result = ACCEPT,
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.prog_type = BPF_PROG_TYPE_TRACING,
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.expected_attach_type = BPF_TRACE_ITER,
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.kfunc = "task",
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.runs = -1, // Don't run, just load
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.fixup_map_array_48b = { 3 },
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},
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