| { |
| "ringbuf: invalid reservation offset 1", |
| .insns = { |
| /* reserve 8 byte ringbuf memory */ |
| BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0), |
| BPF_LD_MAP_FD(BPF_REG_1, 0), |
| BPF_MOV64_IMM(BPF_REG_2, 8), |
| BPF_MOV64_IMM(BPF_REG_3, 0), |
| BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_ringbuf_reserve), |
| /* store a pointer to the reserved memory in R6 */ |
| BPF_MOV64_REG(BPF_REG_6, BPF_REG_0), |
| /* check whether the reservation was successful */ |
| BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 7), |
| /* spill R6(mem) into the stack */ |
| BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_6, -8), |
| /* fill it back in R7 */ |
| BPF_LDX_MEM(BPF_DW, BPF_REG_7, BPF_REG_10, -8), |
| /* should be able to access *(R7) = 0 */ |
| BPF_ST_MEM(BPF_DW, BPF_REG_7, 0, 0), |
| /* submit the reserved ringbuf memory */ |
| BPF_MOV64_REG(BPF_REG_1, BPF_REG_7), |
| /* add invalid offset to reserved ringbuf memory */ |
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 0xcafe), |
| BPF_MOV64_IMM(BPF_REG_2, 0), |
| 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 }, |
| .result = REJECT, |
| .errstr = "dereference of modified alloc_mem ptr R1", |
| }, |
| { |
| "ringbuf: invalid reservation offset 2", |
| .insns = { |
| /* reserve 8 byte ringbuf memory */ |
| BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0), |
| BPF_LD_MAP_FD(BPF_REG_1, 0), |
| BPF_MOV64_IMM(BPF_REG_2, 8), |
| BPF_MOV64_IMM(BPF_REG_3, 0), |
| BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_ringbuf_reserve), |
| /* store a pointer to the reserved memory in R6 */ |
| BPF_MOV64_REG(BPF_REG_6, BPF_REG_0), |
| /* check whether the reservation was successful */ |
| BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 7), |
| /* spill R6(mem) into the stack */ |
| BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_6, -8), |
| /* fill it back in R7 */ |
| BPF_LDX_MEM(BPF_DW, BPF_REG_7, BPF_REG_10, -8), |
| /* add invalid offset to reserved ringbuf memory */ |
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_7, 0xcafe), |
| /* should be able to access *(R7) = 0 */ |
| BPF_ST_MEM(BPF_DW, BPF_REG_7, 0, 0), |
| /* submit the reserved ringbuf memory */ |
| BPF_MOV64_REG(BPF_REG_1, BPF_REG_7), |
| BPF_MOV64_IMM(BPF_REG_2, 0), |
| 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 }, |
| .result = REJECT, |
| .errstr = "R7 min value is outside of the allowed memory range", |
| }, |
| { |
| "ringbuf: check passing rb mem to helpers", |
| .insns = { |
| BPF_MOV64_REG(BPF_REG_6, BPF_REG_1), |
| /* reserve 8 byte ringbuf memory */ |
| BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0), |
| BPF_LD_MAP_FD(BPF_REG_1, 0), |
| BPF_MOV64_IMM(BPF_REG_2, 8), |
| BPF_MOV64_IMM(BPF_REG_3, 0), |
| BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_ringbuf_reserve), |
| BPF_MOV64_REG(BPF_REG_7, BPF_REG_0), |
| /* check whether the reservation was successful */ |
| BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1), |
| BPF_EXIT_INSN(), |
| /* pass allocated ring buffer memory to fib lookup */ |
| BPF_MOV64_REG(BPF_REG_1, BPF_REG_6), |
| BPF_MOV64_REG(BPF_REG_2, BPF_REG_0), |
| BPF_MOV64_IMM(BPF_REG_3, 8), |
| BPF_MOV64_IMM(BPF_REG_4, 0), |
| BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_fib_lookup), |
| /* submit the ringbuf memory */ |
| BPF_MOV64_REG(BPF_REG_1, BPF_REG_7), |
| BPF_MOV64_IMM(BPF_REG_2, 0), |
| 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 = { 2 }, |
| .prog_type = BPF_PROG_TYPE_XDP, |
| .result = ACCEPT, |
| }, |
