selftests/bpf: verifier/bounds converted to inline assembly
Test verifier/bounds automatically converted to use inline assembly. Signed-off-by: Eduard Zingerman <eddyz87@gmail.com> Link: https://lore.kernel.org/r/20230421174234.2391278-3-eddyz87@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Eduard Zingerman
Alexei Starovoitov
parent
63bb645b9d
commit
c92336559a
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@ -6,6 +6,7 @@
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#include "verifier_and.skel.h"
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#include "verifier_array_access.skel.h"
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#include "verifier_basic_stack.skel.h"
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#include "verifier_bounds.skel.h"
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#include "verifier_bounds_deduction.skel.h"
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#include "verifier_bounds_deduction_non_const.skel.h"
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#include "verifier_bounds_mix_sign_unsign.skel.h"
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@ -82,6 +83,7 @@ static void run_tests_aux(const char *skel_name,
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void test_verifier_and(void) { RUN(verifier_and); }
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void test_verifier_basic_stack(void) { RUN(verifier_basic_stack); }
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void test_verifier_bounds(void) { RUN(verifier_bounds); }
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void test_verifier_bounds_deduction(void) { RUN(verifier_bounds_deduction); }
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void test_verifier_bounds_deduction_non_const(void) { RUN(verifier_bounds_deduction_non_const); }
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void test_verifier_bounds_mix_sign_unsign(void) { RUN(verifier_bounds_mix_sign_unsign); }
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File diff suppressed because it is too large
Load Diff
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@ -1,884 +0,0 @@
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{
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"subtraction bounds (map value) variant 1",
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.insns = {
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BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 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_LD_MAP_FD(BPF_REG_1, 0),
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BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 9),
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BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_0, 0),
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BPF_JMP_IMM(BPF_JGT, BPF_REG_1, 0xff, 7),
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BPF_LDX_MEM(BPF_B, BPF_REG_3, BPF_REG_0, 1),
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BPF_JMP_IMM(BPF_JGT, BPF_REG_3, 0xff, 5),
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BPF_ALU64_REG(BPF_SUB, BPF_REG_1, BPF_REG_3),
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BPF_ALU64_IMM(BPF_RSH, BPF_REG_1, 56),
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BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1),
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BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 0),
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BPF_EXIT_INSN(),
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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_hash_8b = { 3 },
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.errstr = "R0 max value is outside of the allowed memory range",
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.result = REJECT,
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},
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{
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"subtraction bounds (map value) variant 2",
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.insns = {
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BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 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_LD_MAP_FD(BPF_REG_1, 0),
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BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 8),
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BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_0, 0),
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BPF_JMP_IMM(BPF_JGT, BPF_REG_1, 0xff, 6),
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BPF_LDX_MEM(BPF_B, BPF_REG_3, BPF_REG_0, 1),
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BPF_JMP_IMM(BPF_JGT, BPF_REG_3, 0xff, 4),
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BPF_ALU64_REG(BPF_SUB, BPF_REG_1, BPF_REG_3),
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BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1),
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BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 0),
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BPF_EXIT_INSN(),
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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_hash_8b = { 3 },
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.errstr = "R0 min value is negative, either use unsigned index or do a if (index >=0) check.",
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.errstr_unpriv = "R1 has unknown scalar with mixed signed bounds",
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.result = REJECT,
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},
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{
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"check subtraction on pointers for unpriv",
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.insns = {
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_LD_MAP_FD(BPF_REG_ARG1, 0),
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BPF_MOV64_REG(BPF_REG_ARG2, BPF_REG_FP),
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BPF_ALU64_IMM(BPF_ADD, BPF_REG_ARG2, -8),
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BPF_ST_MEM(BPF_DW, BPF_REG_ARG2, 0, 9),
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BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
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BPF_MOV64_REG(BPF_REG_9, BPF_REG_FP),
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BPF_ALU64_REG(BPF_SUB, BPF_REG_9, BPF_REG_0),
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BPF_LD_MAP_FD(BPF_REG_ARG1, 0),
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BPF_MOV64_REG(BPF_REG_ARG2, BPF_REG_FP),
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BPF_ALU64_IMM(BPF_ADD, BPF_REG_ARG2, -8),
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BPF_ST_MEM(BPF_DW, BPF_REG_ARG2, 0, 0),
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BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
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BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1),
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BPF_EXIT_INSN(),
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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_hash_8b = { 1, 9 },
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.result = ACCEPT,
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.result_unpriv = REJECT,
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.errstr_unpriv = "R9 pointer -= pointer prohibited",
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},
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{
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"bounds check based on zero-extended MOV",
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.insns = {
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BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 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_LD_MAP_FD(BPF_REG_1, 0),
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BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 4),
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/* r2 = 0x0000'0000'ffff'ffff */
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BPF_MOV32_IMM(BPF_REG_2, 0xffffffff),
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/* r2 = 0 */
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BPF_ALU64_IMM(BPF_RSH, BPF_REG_2, 32),
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/* no-op */
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BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_2),
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/* access at offset 0 */
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BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 0),
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/* exit */
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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_hash_8b = { 3 },
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.result = ACCEPT
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},
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{
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"bounds check based on sign-extended MOV. test1",
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.insns = {
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BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 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_LD_MAP_FD(BPF_REG_1, 0),
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BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 4),
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/* r2 = 0xffff'ffff'ffff'ffff */
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BPF_MOV64_IMM(BPF_REG_2, 0xffffffff),
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/* r2 = 0xffff'ffff */
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BPF_ALU64_IMM(BPF_RSH, BPF_REG_2, 32),
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/* r0 = <oob pointer> */
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BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_2),
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/* access to OOB pointer */
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BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 0),
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/* exit */
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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_hash_8b = { 3 },
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.errstr = "map_value pointer and 4294967295",
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.result = REJECT
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},
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{
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"bounds check based on sign-extended MOV. test2",
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.insns = {
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BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 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_LD_MAP_FD(BPF_REG_1, 0),
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BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 4),
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/* r2 = 0xffff'ffff'ffff'ffff */
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BPF_MOV64_IMM(BPF_REG_2, 0xffffffff),
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/* r2 = 0xfff'ffff */
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BPF_ALU64_IMM(BPF_RSH, BPF_REG_2, 36),
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/* r0 = <oob pointer> */
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BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_2),
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/* access to OOB pointer */
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BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 0),
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/* exit */
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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_hash_8b = { 3 },
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.errstr = "R0 min value is outside of the allowed memory range",
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.result = REJECT
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},
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{
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"bounds check based on reg_off + var_off + insn_off. test1",
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.insns = {
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BPF_LDX_MEM(BPF_W, BPF_REG_6, BPF_REG_1,
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offsetof(struct __sk_buff, mark)),
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BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 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_LD_MAP_FD(BPF_REG_1, 0),
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BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 4),
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BPF_ALU64_IMM(BPF_AND, BPF_REG_6, 1),
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BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, (1 << 29) - 1),
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BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_6),
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BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, (1 << 29) - 1),
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BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 3),
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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_hash_8b = { 4 },
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.errstr = "value_size=8 off=1073741825",
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.result = REJECT,
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.prog_type = BPF_PROG_TYPE_SCHED_CLS,
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},
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{
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"bounds check based on reg_off + var_off + insn_off. test2",
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.insns = {
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BPF_LDX_MEM(BPF_W, BPF_REG_6, BPF_REG_1,
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offsetof(struct __sk_buff, mark)),
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BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 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_LD_MAP_FD(BPF_REG_1, 0),
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BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 4),
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BPF_ALU64_IMM(BPF_AND, BPF_REG_6, 1),
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BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, (1 << 30) - 1),
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BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_6),
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BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, (1 << 29) - 1),
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BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 3),
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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_hash_8b = { 4 },
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.errstr = "value 1073741823",
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.result = REJECT,
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.prog_type = BPF_PROG_TYPE_SCHED_CLS,
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},
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{
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"bounds check after truncation of non-boundary-crossing range",
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.insns = {
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BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 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_LD_MAP_FD(BPF_REG_1, 0),
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BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 9),
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/* r1 = [0x00, 0xff] */
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BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_0, 0),
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BPF_MOV64_IMM(BPF_REG_2, 1),
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/* r2 = 0x10'0000'0000 */
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BPF_ALU64_IMM(BPF_LSH, BPF_REG_2, 36),
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/* r1 = [0x10'0000'0000, 0x10'0000'00ff] */
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BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_2),
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/* r1 = [0x10'7fff'ffff, 0x10'8000'00fe] */
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BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 0x7fffffff),
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/* r1 = [0x00, 0xff] */
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BPF_ALU32_IMM(BPF_SUB, BPF_REG_1, 0x7fffffff),
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/* r1 = 0 */
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BPF_ALU64_IMM(BPF_RSH, BPF_REG_1, 8),
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/* no-op */
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BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1),
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/* access at offset 0 */
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BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 0),
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/* exit */
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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_hash_8b = { 3 },
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.result = ACCEPT
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},
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{
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"bounds check after truncation of boundary-crossing range (1)",
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.insns = {
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BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 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_LD_MAP_FD(BPF_REG_1, 0),
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BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 8),
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/* r1 = [0x00, 0xff] */
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BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_0, 0),
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BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 0xffffff80 >> 1),
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/* r1 = [0xffff'ff80, 0x1'0000'007f] */
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BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 0xffffff80 >> 1),
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/* r1 = [0xffff'ff80, 0xffff'ffff] or
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* [0x0000'0000, 0x0000'007f]
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*/
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BPF_ALU32_IMM(BPF_ADD, BPF_REG_1, 0),
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BPF_ALU64_IMM(BPF_SUB, BPF_REG_1, 0xffffff80 >> 1),
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/* r1 = [0x00, 0xff] or
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* [0xffff'ffff'0000'0080, 0xffff'ffff'ffff'ffff]
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*/
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BPF_ALU64_IMM(BPF_SUB, BPF_REG_1, 0xffffff80 >> 1),
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/* error on OOB pointer computation */
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BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1),
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/* exit */
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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_hash_8b = { 3 },
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/* not actually fully unbounded, but the bound is very high */
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.errstr = "value -4294967168 makes map_value pointer be out of bounds",
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.result = REJECT,
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},
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{
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"bounds check after truncation of boundary-crossing range (2)",
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.insns = {
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BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 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_LD_MAP_FD(BPF_REG_1, 0),
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BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 8),
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/* r1 = [0x00, 0xff] */
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BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_0, 0),
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BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 0xffffff80 >> 1),
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/* r1 = [0xffff'ff80, 0x1'0000'007f] */
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BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 0xffffff80 >> 1),
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/* r1 = [0xffff'ff80, 0xffff'ffff] or
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* [0x0000'0000, 0x0000'007f]
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* difference to previous test: truncation via MOV32
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* instead of ALU32.
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*/
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BPF_MOV32_REG(BPF_REG_1, BPF_REG_1),
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BPF_ALU64_IMM(BPF_SUB, BPF_REG_1, 0xffffff80 >> 1),
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/* r1 = [0x00, 0xff] or
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* [0xffff'ffff'0000'0080, 0xffff'ffff'ffff'ffff]
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*/
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BPF_ALU64_IMM(BPF_SUB, BPF_REG_1, 0xffffff80 >> 1),
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/* error on OOB pointer computation */
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BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1),
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/* exit */
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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_hash_8b = { 3 },
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.errstr = "value -4294967168 makes map_value pointer be out of bounds",
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.result = REJECT,
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},
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{
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"bounds check after wrapping 32-bit addition",
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.insns = {
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
BPF_LD_MAP_FD(BPF_REG_1, 0),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
|
||||
BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 5),
|
||||
/* r1 = 0x7fff'ffff */
|
||||
BPF_MOV64_IMM(BPF_REG_1, 0x7fffffff),
|
||||
/* r1 = 0xffff'fffe */
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 0x7fffffff),
|
||||
/* r1 = 0 */
|
||||
BPF_ALU32_IMM(BPF_ADD, BPF_REG_1, 2),
|
||||
/* no-op */
|
||||
BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1),
|
||||
/* access at offset 0 */
|
||||
BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 0),
|
||||
/* exit */
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.fixup_map_hash_8b = { 3 },
|
||||
.result = ACCEPT
|
||||
},
|
||||
{
|
||||
"bounds check after shift with oversized count operand",
|
||||
.insns = {
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
BPF_LD_MAP_FD(BPF_REG_1, 0),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
|
||||
BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 6),
|
||||
BPF_MOV64_IMM(BPF_REG_2, 32),
|
||||
BPF_MOV64_IMM(BPF_REG_1, 1),
|
||||
/* r1 = (u32)1 << (u32)32 = ? */
|
||||
BPF_ALU32_REG(BPF_LSH, BPF_REG_1, BPF_REG_2),
|
||||
/* r1 = [0x0000, 0xffff] */
|
||||
BPF_ALU64_IMM(BPF_AND, BPF_REG_1, 0xffff),
|
||||
/* computes unknown pointer, potentially OOB */
|
||||
BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1),
|
||||
/* potentially OOB access */
|
||||
BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 0),
|
||||
/* exit */
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.fixup_map_hash_8b = { 3 },
|
||||
.errstr = "R0 max value is outside of the allowed memory range",
|
||||
.result = REJECT
|
||||
},
|
||||
{
|
||||
"bounds check after right shift of maybe-negative number",
|
||||
.insns = {
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
BPF_LD_MAP_FD(BPF_REG_1, 0),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
|
||||
BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 6),
|
||||
/* r1 = [0x00, 0xff] */
|
||||
BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_0, 0),
|
||||
/* r1 = [-0x01, 0xfe] */
|
||||
BPF_ALU64_IMM(BPF_SUB, BPF_REG_1, 1),
|
||||
/* r1 = 0 or 0xff'ffff'ffff'ffff */
|
||||
BPF_ALU64_IMM(BPF_RSH, BPF_REG_1, 8),
|
||||
/* r1 = 0 or 0xffff'ffff'ffff */
|
||||
BPF_ALU64_IMM(BPF_RSH, BPF_REG_1, 8),
|
||||
/* computes unknown pointer, potentially OOB */
|
||||
BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1),
|
||||
/* potentially OOB access */
|
||||
BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 0),
|
||||
/* exit */
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.fixup_map_hash_8b = { 3 },
|
||||
.errstr = "R0 unbounded memory access",
|
||||
.result = REJECT
|
||||
},
|
||||
{
|
||||
"bounds check after 32-bit right shift with 64-bit input",
|
||||
.insns = {
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
BPF_LD_MAP_FD(BPF_REG_1, 0),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
|
||||
BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 6),
|
||||
/* r1 = 2 */
|
||||
BPF_MOV64_IMM(BPF_REG_1, 2),
|
||||
/* r1 = 1<<32 */
|
||||
BPF_ALU64_IMM(BPF_LSH, BPF_REG_1, 31),
|
||||
/* r1 = 0 (NOT 2!) */
|
||||
BPF_ALU32_IMM(BPF_RSH, BPF_REG_1, 31),
|
||||
/* r1 = 0xffff'fffe (NOT 0!) */
|
||||
BPF_ALU32_IMM(BPF_SUB, BPF_REG_1, 2),
|
||||
/* error on computing OOB pointer */
|
||||
BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1),
|
||||
/* exit */
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.fixup_map_hash_8b = { 3 },
|
||||
.errstr = "math between map_value pointer and 4294967294 is not allowed",
|
||||
.result = REJECT,
|
||||
},
|
||||
{
|
||||
"bounds check map access with off+size signed 32bit overflow. test1",
|
||||
.insns = {
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
BPF_LD_MAP_FD(BPF_REG_1, 0),
|
||||
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_ADD, BPF_REG_0, 0x7ffffffe),
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_0, 0),
|
||||
BPF_JMP_A(0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.fixup_map_hash_8b = { 3 },
|
||||
.errstr = "map_value pointer and 2147483646",
|
||||
.result = REJECT
|
||||
},
|
||||
{
|
||||
"bounds check map access with off+size signed 32bit overflow. test2",
|
||||
.insns = {
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
BPF_LD_MAP_FD(BPF_REG_1, 0),
|
||||
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_ADD, BPF_REG_0, 0x1fffffff),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 0x1fffffff),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 0x1fffffff),
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_0, 0),
|
||||
BPF_JMP_A(0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.fixup_map_hash_8b = { 3 },
|
||||
.errstr = "pointer offset 1073741822",
|
||||
.errstr_unpriv = "R0 pointer arithmetic of map value goes out of range",
|
||||
.result = REJECT
|
||||
},
|
||||
{
|
||||
"bounds check map access with off+size signed 32bit overflow. test3",
|
||||
.insns = {
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
BPF_LD_MAP_FD(BPF_REG_1, 0),
|
||||
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_SUB, BPF_REG_0, 0x1fffffff),
|
||||
BPF_ALU64_IMM(BPF_SUB, BPF_REG_0, 0x1fffffff),
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_0, 2),
|
||||
BPF_JMP_A(0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.fixup_map_hash_8b = { 3 },
|
||||
.errstr = "pointer offset -1073741822",
|
||||
.errstr_unpriv = "R0 pointer arithmetic of map value goes out of range",
|
||||
.result = REJECT
|
||||
},
|
||||
{
|
||||
"bounds check map access with off+size signed 32bit overflow. test4",
|
||||
.insns = {
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
BPF_LD_MAP_FD(BPF_REG_1, 0),
|
||||
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_MOV64_IMM(BPF_REG_1, 1000000),
|
||||
BPF_ALU64_IMM(BPF_MUL, BPF_REG_1, 1000000),
|
||||
BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1),
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_0, 2),
|
||||
BPF_JMP_A(0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.fixup_map_hash_8b = { 3 },
|
||||
.errstr = "map_value pointer and 1000000000000",
|
||||
.result = REJECT
|
||||
},
|
||||
{
|
||||
"bounds check mixed 32bit and 64bit arithmetic. test1",
|
||||
.insns = {
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_MOV64_IMM(BPF_REG_1, -1),
|
||||
BPF_ALU64_IMM(BPF_LSH, BPF_REG_1, 32),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 1),
|
||||
/* r1 = 0xffffFFFF00000001 */
|
||||
BPF_JMP32_IMM(BPF_JGT, BPF_REG_1, 1, 3),
|
||||
/* check ALU64 op keeps 32bit bounds */
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 1),
|
||||
BPF_JMP32_IMM(BPF_JGT, BPF_REG_1, 2, 1),
|
||||
BPF_JMP_A(1),
|
||||
/* invalid ldx if bounds are lost above */
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_0, -1),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.errstr_unpriv = "R0 invalid mem access 'scalar'",
|
||||
.result_unpriv = REJECT,
|
||||
.result = ACCEPT
|
||||
},
|
||||
{
|
||||
"bounds check mixed 32bit and 64bit arithmetic. test2",
|
||||
.insns = {
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_MOV64_IMM(BPF_REG_1, -1),
|
||||
BPF_ALU64_IMM(BPF_LSH, BPF_REG_1, 32),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 1),
|
||||
/* r1 = 0xffffFFFF00000001 */
|
||||
BPF_MOV64_IMM(BPF_REG_2, 3),
|
||||
/* r1 = 0x2 */
|
||||
BPF_ALU32_IMM(BPF_ADD, BPF_REG_1, 1),
|
||||
/* check ALU32 op zero extends 64bit bounds */
|
||||
BPF_JMP_REG(BPF_JGT, BPF_REG_1, BPF_REG_2, 1),
|
||||
BPF_JMP_A(1),
|
||||
/* invalid ldx if bounds are lost above */
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_0, -1),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.errstr_unpriv = "R0 invalid mem access 'scalar'",
|
||||
.result_unpriv = REJECT,
|
||||
.result = ACCEPT
|
||||
},
|
||||
{
|
||||
"assigning 32bit bounds to 64bit for wA = 0, wB = wA",
|
||||
.insns = {
|
||||
BPF_LDX_MEM(BPF_W, BPF_REG_8, BPF_REG_1,
|
||||
offsetof(struct __sk_buff, data_end)),
|
||||
BPF_LDX_MEM(BPF_W, BPF_REG_7, BPF_REG_1,
|
||||
offsetof(struct __sk_buff, data)),
|
||||
BPF_MOV32_IMM(BPF_REG_9, 0),
|
||||
BPF_MOV32_REG(BPF_REG_2, BPF_REG_9),
|
||||
BPF_MOV64_REG(BPF_REG_6, BPF_REG_7),
|
||||
BPF_ALU64_REG(BPF_ADD, BPF_REG_6, BPF_REG_2),
|
||||
BPF_MOV64_REG(BPF_REG_3, BPF_REG_6),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_3, 8),
|
||||
BPF_JMP_REG(BPF_JGT, BPF_REG_3, BPF_REG_8, 1),
|
||||
BPF_LDX_MEM(BPF_W, BPF_REG_5, BPF_REG_6, 0),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
|
||||
.result = ACCEPT,
|
||||
.flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
|
||||
},
|
||||
{
|
||||
"bounds check for reg = 0, reg xor 1",
|
||||
.insns = {
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
BPF_LD_MAP_FD(BPF_REG_1, 0),
|
||||
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_MOV64_IMM(BPF_REG_1, 0),
|
||||
BPF_ALU64_IMM(BPF_XOR, BPF_REG_1, 1),
|
||||
BPF_JMP_IMM(BPF_JNE, BPF_REG_1, 0, 1),
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_0, 8),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.errstr_unpriv = "R0 min value is outside of the allowed memory range",
|
||||
.result_unpriv = REJECT,
|
||||
.fixup_map_hash_8b = { 3 },
|
||||
.result = ACCEPT,
|
||||
},
|
||||
{
|
||||
"bounds check for reg32 = 0, reg32 xor 1",
|
||||
.insns = {
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
BPF_LD_MAP_FD(BPF_REG_1, 0),
|
||||
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_MOV32_IMM(BPF_REG_1, 0),
|
||||
BPF_ALU32_IMM(BPF_XOR, BPF_REG_1, 1),
|
||||
BPF_JMP32_IMM(BPF_JNE, BPF_REG_1, 0, 1),
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_0, 8),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.errstr_unpriv = "R0 min value is outside of the allowed memory range",
|
||||
.result_unpriv = REJECT,
|
||||
.fixup_map_hash_8b = { 3 },
|
||||
.result = ACCEPT,
|
||||
},
|
||||
{
|
||||
"bounds check for reg = 2, reg xor 3",
|
||||
.insns = {
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
BPF_LD_MAP_FD(BPF_REG_1, 0),
|
||||
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_MOV64_IMM(BPF_REG_1, 2),
|
||||
BPF_ALU64_IMM(BPF_XOR, BPF_REG_1, 3),
|
||||
BPF_JMP_IMM(BPF_JGT, BPF_REG_1, 0, 1),
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_0, 8),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.errstr_unpriv = "R0 min value is outside of the allowed memory range",
|
||||
.result_unpriv = REJECT,
|
||||
.fixup_map_hash_8b = { 3 },
|
||||
.result = ACCEPT,
|
||||
},
|
||||
{
|
||||
"bounds check for reg = any, reg xor 3",
|
||||
.insns = {
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
BPF_LD_MAP_FD(BPF_REG_1, 0),
|
||||
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_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_0, 0),
|
||||
BPF_ALU64_IMM(BPF_XOR, BPF_REG_1, 3),
|
||||
BPF_JMP_IMM(BPF_JNE, BPF_REG_1, 0, 1),
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_0, 8),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.fixup_map_hash_8b = { 3 },
|
||||
.result = REJECT,
|
||||
.errstr = "invalid access to map value",
|
||||
.errstr_unpriv = "invalid access to map value",
|
||||
},
|
||||
{
|
||||
"bounds check for reg32 = any, reg32 xor 3",
|
||||
.insns = {
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
BPF_LD_MAP_FD(BPF_REG_1, 0),
|
||||
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_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_0, 0),
|
||||
BPF_ALU32_IMM(BPF_XOR, BPF_REG_1, 3),
|
||||
BPF_JMP32_IMM(BPF_JNE, BPF_REG_1, 0, 1),
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_0, 8),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.fixup_map_hash_8b = { 3 },
|
||||
.result = REJECT,
|
||||
.errstr = "invalid access to map value",
|
||||
.errstr_unpriv = "invalid access to map value",
|
||||
},
|
||||
{
|
||||
"bounds check for reg > 0, reg xor 3",
|
||||
.insns = {
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
BPF_LD_MAP_FD(BPF_REG_1, 0),
|
||||
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_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_0, 0),
|
||||
BPF_JMP_IMM(BPF_JLE, BPF_REG_1, 0, 3),
|
||||
BPF_ALU64_IMM(BPF_XOR, BPF_REG_1, 3),
|
||||
BPF_JMP_IMM(BPF_JGE, BPF_REG_1, 0, 1),
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_0, 8),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.errstr_unpriv = "R0 min value is outside of the allowed memory range",
|
||||
.result_unpriv = REJECT,
|
||||
.fixup_map_hash_8b = { 3 },
|
||||
.result = ACCEPT,
|
||||
},
|
||||
{
|
||||
"bounds check for reg32 > 0, reg32 xor 3",
|
||||
.insns = {
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
BPF_LD_MAP_FD(BPF_REG_1, 0),
|
||||
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_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_0, 0),
|
||||
BPF_JMP32_IMM(BPF_JLE, BPF_REG_1, 0, 3),
|
||||
BPF_ALU32_IMM(BPF_XOR, BPF_REG_1, 3),
|
||||
BPF_JMP32_IMM(BPF_JGE, BPF_REG_1, 0, 1),
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_0, 8),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.errstr_unpriv = "R0 min value is outside of the allowed memory range",
|
||||
.result_unpriv = REJECT,
|
||||
.fixup_map_hash_8b = { 3 },
|
||||
.result = ACCEPT,
|
||||
},
|
||||
{
|
||||
"bounds checks after 32-bit truncation. test 1",
|
||||
.insns = {
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
BPF_LD_MAP_FD(BPF_REG_1, 0),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
|
||||
BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 4),
|
||||
BPF_LDX_MEM(BPF_W, BPF_REG_1, BPF_REG_0, 0),
|
||||
/* This used to reduce the max bound to 0x7fffffff */
|
||||
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 1),
|
||||
BPF_JMP_IMM(BPF_JGT, BPF_REG_1, 0x7fffffff, 1),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.fixup_map_hash_8b = { 3 },
|
||||
.errstr_unpriv = "R0 leaks addr",
|
||||
.result_unpriv = REJECT,
|
||||
.result = ACCEPT,
|
||||
},
|
||||
{
|
||||
"bounds checks after 32-bit truncation. test 2",
|
||||
.insns = {
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
BPF_LD_MAP_FD(BPF_REG_1, 0),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
|
||||
BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 4),
|
||||
BPF_LDX_MEM(BPF_W, BPF_REG_1, BPF_REG_0, 0),
|
||||
BPF_JMP_IMM(BPF_JSLT, BPF_REG_1, 1, 1),
|
||||
BPF_JMP32_IMM(BPF_JSLT, BPF_REG_1, 0, 1),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.fixup_map_hash_8b = { 3 },
|
||||
.errstr_unpriv = "R0 leaks addr",
|
||||
.result_unpriv = REJECT,
|
||||
.result = ACCEPT,
|
||||
},
|
||||
{
|
||||
"bound check with JMP_JLT for crossing 64-bit signed boundary",
|
||||
.insns = {
|
||||
BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1, offsetof(struct xdp_md, data)),
|
||||
BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1, offsetof(struct xdp_md, data_end)),
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_2),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 1),
|
||||
BPF_JMP_REG(BPF_JGT, BPF_REG_1, BPF_REG_3, 8),
|
||||
|
||||
BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_2, 0),
|
||||
BPF_LD_IMM64(BPF_REG_0, 0x7fffffffffffff10),
|
||||
BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_0),
|
||||
|
||||
BPF_LD_IMM64(BPF_REG_0, 0x8000000000000000),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 1),
|
||||
/* r1 unsigned range is [0x7fffffffffffff10, 0x800000000000000f] */
|
||||
BPF_JMP_REG(BPF_JLT, BPF_REG_0, BPF_REG_1, -2),
|
||||
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = ACCEPT,
|
||||
.prog_type = BPF_PROG_TYPE_XDP,
|
||||
},
|
||||
{
|
||||
"bound check with JMP_JSLT for crossing 64-bit signed boundary",
|
||||
.insns = {
|
||||
BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1, offsetof(struct xdp_md, data)),
|
||||
BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1, offsetof(struct xdp_md, data_end)),
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_2),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 1),
|
||||
BPF_JMP_REG(BPF_JGT, BPF_REG_1, BPF_REG_3, 13),
|
||||
|
||||
BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_2, 0),
|
||||
BPF_LD_IMM64(BPF_REG_0, 0x7fffffffffffff10),
|
||||
BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_0),
|
||||
|
||||
BPF_LD_IMM64(BPF_REG_2, 0x8000000000000fff),
|
||||
BPF_LD_IMM64(BPF_REG_0, 0x8000000000000000),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 1),
|
||||
BPF_JMP_REG(BPF_JSGT, BPF_REG_0, BPF_REG_2, 3),
|
||||
/* r1 signed range is [S64_MIN, S64_MAX] */
|
||||
BPF_JMP_REG(BPF_JSLT, BPF_REG_0, BPF_REG_1, -3),
|
||||
|
||||
BPF_MOV64_IMM(BPF_REG_0, 1),
|
||||
BPF_EXIT_INSN(),
|
||||
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = ACCEPT,
|
||||
.prog_type = BPF_PROG_TYPE_XDP,
|
||||
},
|
||||
{
|
||||
"bound check for loop upper bound greater than U32_MAX",
|
||||
.insns = {
|
||||
BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1, offsetof(struct xdp_md, data)),
|
||||
BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1, offsetof(struct xdp_md, data_end)),
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_2),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 1),
|
||||
BPF_JMP_REG(BPF_JGT, BPF_REG_1, BPF_REG_3, 8),
|
||||
|
||||
BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_2, 0),
|
||||
BPF_LD_IMM64(BPF_REG_0, 0x100000000),
|
||||
BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_0),
|
||||
|
||||
BPF_LD_IMM64(BPF_REG_0, 0x100000000),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 1),
|
||||
BPF_JMP_REG(BPF_JLT, BPF_REG_0, BPF_REG_1, -2),
|
||||
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = ACCEPT,
|
||||
.prog_type = BPF_PROG_TYPE_XDP,
|
||||
},
|
||||
{
|
||||
"bound check with JMP32_JLT for crossing 32-bit signed boundary",
|
||||
.insns = {
|
||||
BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1, offsetof(struct xdp_md, data)),
|
||||
BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1, offsetof(struct xdp_md, data_end)),
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_2),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 1),
|
||||
BPF_JMP_REG(BPF_JGT, BPF_REG_1, BPF_REG_3, 6),
|
||||
|
||||
BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_2, 0),
|
||||
BPF_MOV32_IMM(BPF_REG_0, 0x7fffff10),
|
||||
BPF_ALU32_REG(BPF_ADD, BPF_REG_1, BPF_REG_0),
|
||||
|
||||
BPF_MOV32_IMM(BPF_REG_0, 0x80000000),
|
||||
BPF_ALU32_IMM(BPF_ADD, BPF_REG_0, 1),
|
||||
/* r1 unsigned range is [0, 0x8000000f] */
|
||||
BPF_JMP32_REG(BPF_JLT, BPF_REG_0, BPF_REG_1, -2),
|
||||
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = ACCEPT,
|
||||
.prog_type = BPF_PROG_TYPE_XDP,
|
||||
},
|
||||
{
|
||||
"bound check with JMP32_JSLT for crossing 32-bit signed boundary",
|
||||
.insns = {
|
||||
BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1, offsetof(struct xdp_md, data)),
|
||||
BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1, offsetof(struct xdp_md, data_end)),
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_2),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 1),
|
||||
BPF_JMP_REG(BPF_JGT, BPF_REG_1, BPF_REG_3, 10),
|
||||
|
||||
BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_2, 0),
|
||||
BPF_MOV32_IMM(BPF_REG_0, 0x7fffff10),
|
||||
BPF_ALU32_REG(BPF_ADD, BPF_REG_1, BPF_REG_0),
|
||||
|
||||
BPF_MOV32_IMM(BPF_REG_2, 0x80000fff),
|
||||
BPF_MOV32_IMM(BPF_REG_0, 0x80000000),
|
||||
BPF_ALU32_IMM(BPF_ADD, BPF_REG_0, 1),
|
||||
BPF_JMP32_REG(BPF_JSGT, BPF_REG_0, BPF_REG_2, 3),
|
||||
/* r1 signed range is [S32_MIN, S32_MAX] */
|
||||
BPF_JMP32_REG(BPF_JSLT, BPF_REG_0, BPF_REG_1, -3),
|
||||
|
||||
BPF_MOV64_IMM(BPF_REG_0, 1),
|
||||
BPF_EXIT_INSN(),
|
||||
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = ACCEPT,
|
||||
.prog_type = BPF_PROG_TYPE_XDP,
|
||||
},
|
||||
Loading…
Reference in New Issue