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|
{
"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",
},
|
