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Diffstat (limited to 'tools/testing/selftests/bpf/verifier/search_pruning.c')
-rw-r--r--tools/testing/selftests/bpf/verifier/search_pruning.c266
1 files changed, 0 insertions, 266 deletions
diff --git a/tools/testing/selftests/bpf/verifier/search_pruning.c b/tools/testing/selftests/bpf/verifier/search_pruning.c
deleted file mode 100644
index 745d6b5842fd..000000000000
--- a/tools/testing/selftests/bpf/verifier/search_pruning.c
+++ /dev/null
@@ -1,266 +0,0 @@
-{
- "pointer/scalar confusion in state equality check (way 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, 2),
- BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_0, 0),
- BPF_JMP_A(1),
- BPF_MOV64_REG(BPF_REG_0, BPF_REG_10),
- BPF_JMP_A(0),
- BPF_EXIT_INSN(),
- },
- .fixup_map_hash_8b = { 3 },
- .result = ACCEPT,
- .retval = POINTER_VALUE,
- .result_unpriv = REJECT,
- .errstr_unpriv = "R0 leaks addr as return value"
-},
-{
- "pointer/scalar confusion in state equality check (way 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_JNE, BPF_REG_0, 0, 2),
- BPF_MOV64_REG(BPF_REG_0, BPF_REG_10),
- BPF_JMP_A(1),
- BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_0, 0),
- BPF_EXIT_INSN(),
- },
- .fixup_map_hash_8b = { 3 },
- .result = ACCEPT,
- .retval = POINTER_VALUE,
- .result_unpriv = REJECT,
- .errstr_unpriv = "R0 leaks addr as return value"
-},
-{
- "liveness pruning and write screening",
- .insns = {
- /* Get an unknown value */
- BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1, 0),
- /* branch conditions teach us nothing about R2 */
- BPF_JMP_IMM(BPF_JGE, BPF_REG_2, 0, 1),
- BPF_MOV64_IMM(BPF_REG_0, 0),
- BPF_JMP_IMM(BPF_JGE, BPF_REG_2, 0, 1),
- BPF_MOV64_IMM(BPF_REG_0, 0),
- BPF_EXIT_INSN(),
- },
- .errstr = "R0 !read_ok",
- .result = REJECT,
- .prog_type = BPF_PROG_TYPE_LWT_IN,
-},
-{
- "varlen_map_value_access pruning",
- .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, 8),
- BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_0, 0),
- BPF_MOV32_IMM(BPF_REG_2, MAX_ENTRIES),
- BPF_JMP_REG(BPF_JSGT, BPF_REG_2, BPF_REG_1, 1),
- BPF_MOV32_IMM(BPF_REG_1, 0),
- BPF_ALU32_IMM(BPF_LSH, BPF_REG_1, 2),
- BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1),
- BPF_JMP_IMM(BPF_JA, 0, 0, 0),
- BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, offsetof(struct test_val, foo)),
- BPF_EXIT_INSN(),
- },
- .fixup_map_hash_48b = { 3 },
- .errstr_unpriv = "R0 leaks addr",
- .errstr = "R0 unbounded memory access",
- .result_unpriv = REJECT,
- .result = REJECT,
- .flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
-},
-{
- "search pruning: all branches should be verified (nop operation)",
- .insns = {
- BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
- BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
- BPF_ST_MEM(BPF_DW, BPF_REG_2, 0, 0),
- BPF_LD_MAP_FD(BPF_REG_1, 0),
- BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem),
- BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 11),
- BPF_LDX_MEM(BPF_DW, BPF_REG_3, BPF_REG_0, 0),
- BPF_JMP_IMM(BPF_JEQ, BPF_REG_3, 0xbeef, 2),
- BPF_MOV64_IMM(BPF_REG_4, 0),
- BPF_JMP_A(1),
- BPF_MOV64_IMM(BPF_REG_4, 1),
- BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_4, -16),
- BPF_EMIT_CALL(BPF_FUNC_ktime_get_ns),
- BPF_LDX_MEM(BPF_DW, BPF_REG_5, BPF_REG_10, -16),
- BPF_JMP_IMM(BPF_JEQ, BPF_REG_5, 0, 2),
- BPF_MOV64_IMM(BPF_REG_6, 0),
- BPF_ST_MEM(BPF_DW, BPF_REG_6, 0, 0xdead),
- BPF_EXIT_INSN(),
- },
- .fixup_map_hash_8b = { 3 },
- .errstr = "R6 invalid mem access 'scalar'",
- .result = REJECT,
- .prog_type = BPF_PROG_TYPE_TRACEPOINT,
-},
-{
- "search pruning: all branches should be verified (invalid stack access)",
- .insns = {
- BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
- BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
- BPF_ST_MEM(BPF_DW, BPF_REG_2, 0, 0),
- BPF_LD_MAP_FD(BPF_REG_1, 0),
- BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem),
- BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 8),
- BPF_LDX_MEM(BPF_DW, BPF_REG_3, BPF_REG_0, 0),
- BPF_MOV64_IMM(BPF_REG_4, 0),
- BPF_JMP_IMM(BPF_JEQ, BPF_REG_3, 0xbeef, 2),
- BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_4, -16),
- BPF_JMP_A(1),
- BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_4, -24),
- BPF_EMIT_CALL(BPF_FUNC_ktime_get_ns),
- BPF_LDX_MEM(BPF_DW, BPF_REG_5, BPF_REG_10, -16),
- BPF_EXIT_INSN(),
- },
- .fixup_map_hash_8b = { 3 },
- .errstr_unpriv = "invalid read from stack off -16+0 size 8",
- .result_unpriv = REJECT,
- /* in privileged mode reads from uninitialized stack locations are permitted */
- .result = ACCEPT,
-},
-{
- "precision tracking for u32 spill/fill",
- .insns = {
- BPF_MOV64_REG(BPF_REG_7, BPF_REG_1),
- BPF_EMIT_CALL(BPF_FUNC_get_prandom_u32),
- BPF_MOV32_IMM(BPF_REG_6, 32),
- BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 1),
- BPF_MOV32_IMM(BPF_REG_6, 4),
- /* Additional insns to introduce a pruning point. */
- BPF_EMIT_CALL(BPF_FUNC_get_prandom_u32),
- BPF_MOV64_IMM(BPF_REG_3, 0),
- BPF_MOV64_IMM(BPF_REG_3, 0),
- BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 1),
- BPF_MOV64_IMM(BPF_REG_3, 0),
- /* u32 spill/fill */
- BPF_STX_MEM(BPF_W, BPF_REG_10, BPF_REG_6, -8),
- BPF_LDX_MEM(BPF_W, BPF_REG_8, BPF_REG_10, -8),
- /* out-of-bound map value access for r6=32 */
- BPF_ST_MEM(BPF_DW, BPF_REG_10, -16, 0),
- BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
- BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -16),
- 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, 2),
- BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_8),
- BPF_LDX_MEM(BPF_W, BPF_REG_1, BPF_REG_0, 0),
- BPF_MOV64_IMM(BPF_REG_0, 0),
- BPF_EXIT_INSN(),
- },
- .fixup_map_hash_8b = { 15 },
- .result = REJECT,
- .errstr = "R0 min value is outside of the allowed memory range",
- .prog_type = BPF_PROG_TYPE_TRACEPOINT,
-},
-{
- "precision tracking for u32 spills, u64 fill",
- .insns = {
- BPF_EMIT_CALL(BPF_FUNC_get_prandom_u32),
- BPF_MOV64_REG(BPF_REG_6, BPF_REG_0),
- BPF_MOV32_IMM(BPF_REG_7, 0xffffffff),
- /* Additional insns to introduce a pruning point. */
- BPF_MOV64_IMM(BPF_REG_3, 1),
- BPF_MOV64_IMM(BPF_REG_3, 1),
- BPF_MOV64_IMM(BPF_REG_3, 1),
- BPF_MOV64_IMM(BPF_REG_3, 1),
- BPF_EMIT_CALL(BPF_FUNC_get_prandom_u32),
- BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 1),
- BPF_MOV64_IMM(BPF_REG_3, 1),
- BPF_ALU32_IMM(BPF_DIV, BPF_REG_3, 0),
- /* u32 spills, u64 fill */
- BPF_STX_MEM(BPF_W, BPF_REG_10, BPF_REG_6, -4),
- BPF_STX_MEM(BPF_W, BPF_REG_10, BPF_REG_7, -8),
- BPF_LDX_MEM(BPF_DW, BPF_REG_8, BPF_REG_10, -8),
- /* if r8 != X goto pc+1 r8 known in fallthrough branch */
- BPF_JMP_IMM(BPF_JNE, BPF_REG_8, 0xffffffff, 1),
- BPF_MOV64_IMM(BPF_REG_3, 1),
- /* if r8 == X goto pc+1 condition always true on first
- * traversal, so starts backtracking to mark r8 as requiring
- * precision. r7 marked as needing precision. r6 not marked
- * since it's not tracked.
- */
- BPF_JMP_IMM(BPF_JEQ, BPF_REG_8, 0xffffffff, 1),
- /* fails if r8 correctly marked unknown after fill. */
- BPF_ALU32_IMM(BPF_DIV, BPF_REG_3, 0),
- BPF_MOV64_IMM(BPF_REG_0, 0),
- BPF_EXIT_INSN(),
- },
- .result = REJECT,
- .errstr = "div by zero",
- .prog_type = BPF_PROG_TYPE_TRACEPOINT,
-},
-{
- "allocated_stack",
- .insns = {
- BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_1),
- BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_get_prandom_u32),
- BPF_ALU64_REG(BPF_MOV, BPF_REG_7, BPF_REG_0),
- BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 5),
- BPF_MOV64_IMM(BPF_REG_0, 0),
- BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_6, -8),
- BPF_LDX_MEM(BPF_DW, BPF_REG_6, BPF_REG_10, -8),
- BPF_STX_MEM(BPF_B, BPF_REG_10, BPF_REG_7, -9),
- BPF_LDX_MEM(BPF_B, BPF_REG_7, BPF_REG_10, -9),
- BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 0),
- BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 0),
- BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 0),
- BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 0),
- BPF_EXIT_INSN(),
- },
- .result = ACCEPT,
- .result_unpriv = ACCEPT,
- .insn_processed = 15,
-},
-/* The test performs a conditional 64-bit write to a stack location
- * fp[-8], this is followed by an unconditional 8-bit write to fp[-8],
- * then data is read from fp[-8]. This sequence is unsafe.
- *
- * The test would be mistakenly marked as safe w/o dst register parent
- * preservation in verifier.c:copy_register_state() function.
- *
- * Note the usage of BPF_F_TEST_STATE_FREQ to force creation of the
- * checkpoint state after conditional 64-bit assignment.
- */
-{
- "write tracking and register parent chain bug",
- .insns = {
- /* r6 = ktime_get_ns() */
- BPF_EMIT_CALL(BPF_FUNC_ktime_get_ns),
- BPF_MOV64_REG(BPF_REG_6, BPF_REG_0),
- /* r0 = ktime_get_ns() */
- BPF_EMIT_CALL(BPF_FUNC_ktime_get_ns),
- /* if r0 > r6 goto +1 */
- BPF_JMP_REG(BPF_JGT, BPF_REG_0, BPF_REG_6, 1),
- /* *(u64 *)(r10 - 8) = 0xdeadbeef */
- BPF_ST_MEM(BPF_DW, BPF_REG_FP, -8, 0xdeadbeef),
- /* r1 = 42 */
- BPF_MOV64_IMM(BPF_REG_1, 42),
- /* *(u8 *)(r10 - 8) = r1 */
- BPF_STX_MEM(BPF_B, BPF_REG_FP, BPF_REG_1, -8),
- /* r2 = *(u64 *)(r10 - 8) */
- BPF_LDX_MEM(BPF_DW, BPF_REG_2, BPF_REG_FP, -8),
- /* exit(0) */
- BPF_MOV64_IMM(BPF_REG_0, 0),
- BPF_EXIT_INSN(),
- },
- .flags = BPF_F_TEST_STATE_FREQ,
- .errstr_unpriv = "invalid read from stack off -8+1 size 8",
- .result_unpriv = REJECT,
- /* in privileged mode reads from uninitialized stack locations are permitted */
- .result = ACCEPT,
-},
generated by cgit v1.2.3 (git 2.39.0) at 2024-09-16 13:37:11 +0300