246 lines
6.8 KiB
C
246 lines
6.8 KiB
C
{
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"atomic compare-and-exchange smoketest - 64bit",
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.insns = {
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/* val = 3; */
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BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 3),
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/* old = atomic_cmpxchg(&val, 2, 4); */
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BPF_MOV64_IMM(BPF_REG_1, 4),
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BPF_MOV64_IMM(BPF_REG_0, 2),
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BPF_ATOMIC_OP(BPF_DW, BPF_CMPXCHG, BPF_REG_10, BPF_REG_1, -8),
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/* if (old != 3) exit(2); */
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 3, 2),
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BPF_MOV64_IMM(BPF_REG_0, 2),
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BPF_EXIT_INSN(),
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/* if (val != 3) exit(3); */
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BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_10, -8),
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 3, 2),
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BPF_MOV64_IMM(BPF_REG_0, 3),
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BPF_EXIT_INSN(),
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/* old = atomic_cmpxchg(&val, 3, 4); */
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BPF_MOV64_IMM(BPF_REG_1, 4),
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BPF_MOV64_IMM(BPF_REG_0, 3),
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BPF_ATOMIC_OP(BPF_DW, BPF_CMPXCHG, BPF_REG_10, BPF_REG_1, -8),
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/* if (old != 3) exit(4); */
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 3, 2),
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BPF_MOV64_IMM(BPF_REG_0, 4),
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BPF_EXIT_INSN(),
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/* if (val != 4) exit(5); */
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BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_10, -8),
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 4, 2),
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BPF_MOV64_IMM(BPF_REG_0, 5),
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BPF_EXIT_INSN(),
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/* exit(0); */
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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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},
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{
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"atomic compare-and-exchange smoketest - 32bit",
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.insns = {
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/* val = 3; */
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BPF_ST_MEM(BPF_W, BPF_REG_10, -4, 3),
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/* old = atomic_cmpxchg(&val, 2, 4); */
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BPF_MOV32_IMM(BPF_REG_1, 4),
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BPF_MOV32_IMM(BPF_REG_0, 2),
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BPF_ATOMIC_OP(BPF_W, BPF_CMPXCHG, BPF_REG_10, BPF_REG_1, -4),
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/* if (old != 3) exit(2); */
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BPF_JMP32_IMM(BPF_JEQ, BPF_REG_0, 3, 2),
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BPF_MOV32_IMM(BPF_REG_0, 2),
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BPF_EXIT_INSN(),
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/* if (val != 3) exit(3); */
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BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_10, -4),
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BPF_JMP32_IMM(BPF_JEQ, BPF_REG_0, 3, 2),
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BPF_MOV32_IMM(BPF_REG_0, 3),
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BPF_EXIT_INSN(),
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/* old = atomic_cmpxchg(&val, 3, 4); */
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BPF_MOV32_IMM(BPF_REG_1, 4),
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BPF_MOV32_IMM(BPF_REG_0, 3),
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BPF_ATOMIC_OP(BPF_W, BPF_CMPXCHG, BPF_REG_10, BPF_REG_1, -4),
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/* if (old != 3) exit(4); */
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BPF_JMP32_IMM(BPF_JEQ, BPF_REG_0, 3, 2),
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BPF_MOV32_IMM(BPF_REG_0, 4),
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BPF_EXIT_INSN(),
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/* if (val != 4) exit(5); */
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BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_10, -4),
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BPF_JMP32_IMM(BPF_JEQ, BPF_REG_0, 4, 2),
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BPF_MOV32_IMM(BPF_REG_0, 5),
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BPF_EXIT_INSN(),
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/* exit(0); */
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BPF_MOV32_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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},
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{
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"Can't use cmpxchg on uninit src reg",
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.insns = {
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BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 3),
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BPF_MOV64_IMM(BPF_REG_0, 3),
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BPF_ATOMIC_OP(BPF_DW, BPF_CMPXCHG, BPF_REG_10, BPF_REG_2, -8),
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BPF_EXIT_INSN(),
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},
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.result = REJECT,
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.errstr = "!read_ok",
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},
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{
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"Can't use cmpxchg on uninit memory",
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.insns = {
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BPF_MOV64_IMM(BPF_REG_0, 3),
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BPF_MOV64_IMM(BPF_REG_2, 4),
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BPF_ATOMIC_OP(BPF_DW, BPF_CMPXCHG, BPF_REG_10, BPF_REG_2, -8),
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BPF_EXIT_INSN(),
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},
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.result = REJECT,
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.errstr = "invalid read from stack",
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},
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{
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"BPF_W cmpxchg should zero top 32 bits",
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.insns = {
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/* r0 = U64_MAX; */
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_ALU64_IMM(BPF_SUB, BPF_REG_0, 1),
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/* u64 val = r0; */
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BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_0, -8),
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/* r0 = (u32)atomic_cmpxchg((u32 *)&val, r0, 1); */
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BPF_MOV32_IMM(BPF_REG_1, 1),
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BPF_ATOMIC_OP(BPF_W, BPF_CMPXCHG, BPF_REG_10, BPF_REG_1, -8),
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/* r1 = 0x00000000FFFFFFFFull; */
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BPF_MOV64_IMM(BPF_REG_1, 1),
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BPF_ALU64_IMM(BPF_LSH, BPF_REG_1, 32),
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BPF_ALU64_IMM(BPF_SUB, BPF_REG_1, 1),
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/* if (r0 != r1) exit(1); */
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BPF_JMP_REG(BPF_JEQ, BPF_REG_0, BPF_REG_1, 2),
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BPF_MOV32_IMM(BPF_REG_0, 1),
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BPF_EXIT_INSN(),
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/* exit(0); */
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BPF_MOV32_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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},
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{
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"Dest pointer in r0 - fail",
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.insns = {
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/* val = 0; */
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BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
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/* r0 = &val */
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BPF_MOV64_REG(BPF_REG_0, BPF_REG_10),
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/* r0 = atomic_cmpxchg(&val, r0, 1); */
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BPF_MOV64_IMM(BPF_REG_1, 1),
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BPF_ATOMIC_OP(BPF_DW, BPF_CMPXCHG, BPF_REG_10, BPF_REG_1, -8),
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/* if (r0 != 0) exit(1); */
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 2),
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BPF_MOV64_IMM(BPF_REG_0, 1),
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BPF_EXIT_INSN(),
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/* exit(0); */
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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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.result_unpriv = REJECT,
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.errstr_unpriv = "R0 leaks addr into mem",
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},
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{
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"Dest pointer in r0 - succeed",
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.insns = {
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/* r0 = &val */
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BPF_MOV64_REG(BPF_REG_0, BPF_REG_10),
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/* val = r0; */
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BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_0, -8),
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/* r0 = atomic_cmpxchg(&val, r0, 0); */
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BPF_MOV64_IMM(BPF_REG_1, 0),
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BPF_ATOMIC_OP(BPF_DW, BPF_CMPXCHG, BPF_REG_10, BPF_REG_1, -8),
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/* r1 = *r0 */
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BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_0, -8),
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/* exit(0); */
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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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.result_unpriv = REJECT,
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.errstr_unpriv = "R0 leaks addr into mem",
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},
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{
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"Dest pointer in r0 - succeed, check 2",
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.insns = {
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/* r0 = &val */
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BPF_MOV64_REG(BPF_REG_0, BPF_REG_10),
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/* val = r0; */
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BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_0, -8),
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/* r5 = &val */
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BPF_MOV64_REG(BPF_REG_5, BPF_REG_10),
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/* r0 = atomic_cmpxchg(&val, r0, r5); */
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BPF_ATOMIC_OP(BPF_DW, BPF_CMPXCHG, BPF_REG_10, BPF_REG_5, -8),
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/* r1 = *r0 */
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BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_0, -8),
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/* exit(0); */
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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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.result_unpriv = REJECT,
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.errstr_unpriv = "R0 leaks addr into mem",
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},
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{
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"Dest pointer in r0 - succeed, check 3",
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.insns = {
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/* r0 = &val */
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BPF_MOV64_REG(BPF_REG_0, BPF_REG_10),
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/* val = r0; */
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BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_0, -8),
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/* r5 = &val */
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BPF_MOV64_REG(BPF_REG_5, BPF_REG_10),
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/* r0 = atomic_cmpxchg(&val, r0, r5); */
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BPF_ATOMIC_OP(BPF_W, BPF_CMPXCHG, BPF_REG_10, BPF_REG_5, -8),
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/* exit(0); */
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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 = REJECT,
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.errstr = "invalid size of register fill",
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.errstr_unpriv = "R0 leaks addr into mem",
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},
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{
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"Dest pointer in r0 - succeed, check 4",
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.insns = {
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/* r0 = &val */
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BPF_MOV32_REG(BPF_REG_0, BPF_REG_10),
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/* val = r0; */
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BPF_STX_MEM(BPF_W, BPF_REG_10, BPF_REG_0, -8),
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/* r5 = &val */
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BPF_MOV32_REG(BPF_REG_5, BPF_REG_10),
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/* r0 = atomic_cmpxchg(&val, r0, r5); */
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BPF_ATOMIC_OP(BPF_W, BPF_CMPXCHG, BPF_REG_10, BPF_REG_5, -8),
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/* r1 = *r10 */
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BPF_LDX_MEM(BPF_W, BPF_REG_1, BPF_REG_10, -8),
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/* exit(0); */
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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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.result_unpriv = REJECT,
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.errstr_unpriv = "R10 partial copy of pointer",
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},
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{
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"Dest pointer in r0 - succeed, check 5",
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.insns = {
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/* r0 = &val */
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BPF_MOV32_REG(BPF_REG_0, BPF_REG_10),
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/* val = r0; */
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BPF_STX_MEM(BPF_W, BPF_REG_10, BPF_REG_0, -8),
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/* r5 = &val */
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BPF_MOV32_REG(BPF_REG_5, BPF_REG_10),
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/* r0 = atomic_cmpxchg(&val, r0, r5); */
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BPF_ATOMIC_OP(BPF_W, BPF_CMPXCHG, BPF_REG_10, BPF_REG_5, -8),
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/* r1 = *r0 */
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BPF_LDX_MEM(BPF_W, BPF_REG_1, BPF_REG_0, -8),
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/* exit(0); */
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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 = REJECT,
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.errstr = "R0 invalid mem access",
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.errstr_unpriv = "R10 partial copy of pointer",
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},
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