152 lines
6.5 KiB
C
152 lines
6.5 KiB
C
{
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"atomic dw/fetch and address leakage of (map ptr & -1) via stack slot",
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.insns = {
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BPF_LD_IMM64(BPF_REG_1, -1),
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BPF_LD_MAP_FD(BPF_REG_8, 0),
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BPF_LD_MAP_FD(BPF_REG_9, 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_STX_MEM(BPF_DW, BPF_REG_2, BPF_REG_9, 0),
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BPF_ATOMIC_OP(BPF_DW, BPF_AND | BPF_FETCH, BPF_REG_2, BPF_REG_1, 0),
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BPF_LDX_MEM(BPF_DW, BPF_REG_9, BPF_REG_2, 0),
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BPF_ST_MEM(BPF_DW, BPF_REG_2, 0, 0),
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BPF_MOV64_REG(BPF_REG_1, BPF_REG_8),
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BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem),
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 1),
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BPF_STX_MEM(BPF_DW, BPF_REG_0, BPF_REG_9, 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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.fixup_map_array_48b = { 2, 4 },
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.result = ACCEPT,
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.result_unpriv = REJECT,
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.errstr_unpriv = "leaking pointer from stack off -8",
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},
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{
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"atomic dw/fetch and address leakage of (map ptr & -1) via returned value",
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.insns = {
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BPF_LD_IMM64(BPF_REG_1, -1),
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BPF_LD_MAP_FD(BPF_REG_8, 0),
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BPF_LD_MAP_FD(BPF_REG_9, 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_STX_MEM(BPF_DW, BPF_REG_2, BPF_REG_9, 0),
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BPF_ATOMIC_OP(BPF_DW, BPF_AND | BPF_FETCH, BPF_REG_2, BPF_REG_1, 0),
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BPF_MOV64_REG(BPF_REG_9, BPF_REG_1),
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BPF_ST_MEM(BPF_DW, BPF_REG_2, 0, 0),
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BPF_MOV64_REG(BPF_REG_1, BPF_REG_8),
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BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem),
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 1),
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BPF_STX_MEM(BPF_DW, BPF_REG_0, BPF_REG_9, 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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.fixup_map_array_48b = { 2, 4 },
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.result = ACCEPT,
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.result_unpriv = REJECT,
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.errstr_unpriv = "leaking pointer from stack off -8",
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},
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{
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"atomic w/fetch and address leakage of (map ptr & -1) via stack slot",
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.insns = {
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BPF_LD_IMM64(BPF_REG_1, -1),
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BPF_LD_MAP_FD(BPF_REG_8, 0),
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BPF_LD_MAP_FD(BPF_REG_9, 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_STX_MEM(BPF_DW, BPF_REG_2, BPF_REG_9, 0),
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BPF_ATOMIC_OP(BPF_W, BPF_AND | BPF_FETCH, BPF_REG_2, BPF_REG_1, 0),
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BPF_LDX_MEM(BPF_DW, BPF_REG_9, BPF_REG_2, 0),
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BPF_ST_MEM(BPF_DW, BPF_REG_2, 0, 0),
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BPF_MOV64_REG(BPF_REG_1, BPF_REG_8),
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BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem),
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 1),
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BPF_STX_MEM(BPF_DW, BPF_REG_0, BPF_REG_9, 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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.fixup_map_array_48b = { 2, 4 },
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.result = REJECT,
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.errstr = "invalid size of register fill",
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},
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{
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"atomic w/fetch and address leakage of (map ptr & -1) via returned value",
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.insns = {
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BPF_LD_IMM64(BPF_REG_1, -1),
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BPF_LD_MAP_FD(BPF_REG_8, 0),
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BPF_LD_MAP_FD(BPF_REG_9, 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_STX_MEM(BPF_DW, BPF_REG_2, BPF_REG_9, 0),
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BPF_ATOMIC_OP(BPF_W, BPF_AND | BPF_FETCH, BPF_REG_2, BPF_REG_1, 0),
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BPF_MOV64_REG(BPF_REG_9, BPF_REG_1),
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BPF_ST_MEM(BPF_DW, BPF_REG_2, 0, 0),
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BPF_MOV64_REG(BPF_REG_1, BPF_REG_8),
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BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem),
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 1),
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BPF_STX_MEM(BPF_DW, BPF_REG_0, BPF_REG_9, 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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.fixup_map_array_48b = { 2, 4 },
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.result = REJECT,
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.errstr = "invalid size of register fill",
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},
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#define __ATOMIC_FETCH_OP_TEST(src_reg, dst_reg, operand1, op, operand2, expect) \
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{ \
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"atomic fetch " #op ", src=" #dst_reg " dst=" #dst_reg, \
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.insns = { \
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/* u64 val = operan1; */ \
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BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, operand1), \
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/* u64 old = atomic_fetch_add(&val, operand2); */ \
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BPF_MOV64_REG(dst_reg, BPF_REG_10), \
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BPF_MOV64_IMM(src_reg, operand2), \
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BPF_ATOMIC_OP(BPF_DW, op, \
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dst_reg, src_reg, -8), \
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/* if (old != operand1) exit(1); */ \
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BPF_JMP_IMM(BPF_JEQ, src_reg, operand1, 2), \
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BPF_MOV64_IMM(BPF_REG_0, 1), \
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BPF_EXIT_INSN(), \
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/* if (val != result) exit (2); */ \
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BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_10, -8), \
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, expect, 2), \
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BPF_MOV64_IMM(BPF_REG_0, 2), \
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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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__ATOMIC_FETCH_OP_TEST(BPF_REG_1, BPF_REG_2, 1, BPF_ADD | BPF_FETCH, 2, 3),
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__ATOMIC_FETCH_OP_TEST(BPF_REG_0, BPF_REG_1, 1, BPF_ADD | BPF_FETCH, 2, 3),
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__ATOMIC_FETCH_OP_TEST(BPF_REG_1, BPF_REG_0, 1, BPF_ADD | BPF_FETCH, 2, 3),
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__ATOMIC_FETCH_OP_TEST(BPF_REG_2, BPF_REG_3, 1, BPF_ADD | BPF_FETCH, 2, 3),
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__ATOMIC_FETCH_OP_TEST(BPF_REG_4, BPF_REG_5, 1, BPF_ADD | BPF_FETCH, 2, 3),
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__ATOMIC_FETCH_OP_TEST(BPF_REG_9, BPF_REG_8, 1, BPF_ADD | BPF_FETCH, 2, 3),
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__ATOMIC_FETCH_OP_TEST(BPF_REG_1, BPF_REG_2, 0x010, BPF_AND | BPF_FETCH, 0x011, 0x010),
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__ATOMIC_FETCH_OP_TEST(BPF_REG_0, BPF_REG_1, 0x010, BPF_AND | BPF_FETCH, 0x011, 0x010),
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__ATOMIC_FETCH_OP_TEST(BPF_REG_1, BPF_REG_0, 0x010, BPF_AND | BPF_FETCH, 0x011, 0x010),
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__ATOMIC_FETCH_OP_TEST(BPF_REG_2, BPF_REG_3, 0x010, BPF_AND | BPF_FETCH, 0x011, 0x010),
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__ATOMIC_FETCH_OP_TEST(BPF_REG_4, BPF_REG_5, 0x010, BPF_AND | BPF_FETCH, 0x011, 0x010),
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__ATOMIC_FETCH_OP_TEST(BPF_REG_9, BPF_REG_8, 0x010, BPF_AND | BPF_FETCH, 0x011, 0x010),
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__ATOMIC_FETCH_OP_TEST(BPF_REG_1, BPF_REG_2, 0x010, BPF_OR | BPF_FETCH, 0x011, 0x011),
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__ATOMIC_FETCH_OP_TEST(BPF_REG_0, BPF_REG_1, 0x010, BPF_OR | BPF_FETCH, 0x011, 0x011),
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__ATOMIC_FETCH_OP_TEST(BPF_REG_1, BPF_REG_0, 0x010, BPF_OR | BPF_FETCH, 0x011, 0x011),
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__ATOMIC_FETCH_OP_TEST(BPF_REG_2, BPF_REG_3, 0x010, BPF_OR | BPF_FETCH, 0x011, 0x011),
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__ATOMIC_FETCH_OP_TEST(BPF_REG_4, BPF_REG_5, 0x010, BPF_OR | BPF_FETCH, 0x011, 0x011),
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__ATOMIC_FETCH_OP_TEST(BPF_REG_9, BPF_REG_8, 0x010, BPF_OR | BPF_FETCH, 0x011, 0x011),
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__ATOMIC_FETCH_OP_TEST(BPF_REG_1, BPF_REG_2, 0x010, BPF_XOR | BPF_FETCH, 0x011, 0x001),
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__ATOMIC_FETCH_OP_TEST(BPF_REG_0, BPF_REG_1, 0x010, BPF_XOR | BPF_FETCH, 0x011, 0x001),
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__ATOMIC_FETCH_OP_TEST(BPF_REG_1, BPF_REG_0, 0x010, BPF_XOR | BPF_FETCH, 0x011, 0x001),
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__ATOMIC_FETCH_OP_TEST(BPF_REG_2, BPF_REG_3, 0x010, BPF_XOR | BPF_FETCH, 0x011, 0x001),
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__ATOMIC_FETCH_OP_TEST(BPF_REG_4, BPF_REG_5, 0x010, BPF_XOR | BPF_FETCH, 0x011, 0x001),
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__ATOMIC_FETCH_OP_TEST(BPF_REG_9, BPF_REG_8, 0x010, BPF_XOR | BPF_FETCH, 0x011, 0x001),
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__ATOMIC_FETCH_OP_TEST(BPF_REG_1, BPF_REG_2, 0x010, BPF_XCHG, 0x011, 0x011),
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__ATOMIC_FETCH_OP_TEST(BPF_REG_0, BPF_REG_1, 0x010, BPF_XCHG, 0x011, 0x011),
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__ATOMIC_FETCH_OP_TEST(BPF_REG_1, BPF_REG_0, 0x010, BPF_XCHG, 0x011, 0x011),
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__ATOMIC_FETCH_OP_TEST(BPF_REG_2, BPF_REG_3, 0x010, BPF_XCHG, 0x011, 0x011),
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__ATOMIC_FETCH_OP_TEST(BPF_REG_4, BPF_REG_5, 0x010, BPF_XCHG, 0x011, 0x011),
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__ATOMIC_FETCH_OP_TEST(BPF_REG_9, BPF_REG_8, 0x010, BPF_XCHG, 0x011, 0x011),
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#undef __ATOMIC_FETCH_OP_TEST
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