96 lines
3.3 KiB
C
96 lines
3.3 KiB
C
|
{
|
||
|
|
"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,
|
||
|
|
},
|