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| author | Ingo Molnar <mingo@kernel.org> | 2022-01-08 10:53:57 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2022-01-08 10:53:57 +0100 |
| commit | 0422fe2666aea4c0986f4c89dc107731aa6a7a81 (patch) | |
| tree | 1d42a146a738fb933f061424751755e630aeccb0 /tools/testing/selftests/bpf/verifier/search_pruning.c | |
| parent | net/mlx4: Use irq_update_affinity_hint() (diff) | |
| parent | Merge branch 'for-5.16-fixes' of git://git.kernel.org/pub/scm/linux/kernel/gi... (diff) | |
| download | linux-0422fe2666aea4c0986f4c89dc107731aa6a7a81.tar.xz linux-0422fe2666aea4c0986f4c89dc107731aa6a7a81.zip | |
Merge branch 'linus' into irq/core, to fix conflict
Conflicts:
drivers/net/ethernet/mellanox/mlx5/core/pci_irq.c
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'tools/testing/selftests/bpf/verifier/search_pruning.c')
| -rw-r--r-- | tools/testing/selftests/bpf/verifier/search_pruning.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/verifier/search_pruning.c b/tools/testing/selftests/bpf/verifier/search_pruning.c index 7e50cb80873a..682519769fe3 100644 --- a/tools/testing/selftests/bpf/verifier/search_pruning.c +++ b/tools/testing/selftests/bpf/verifier/search_pruning.c @@ -133,6 +133,77 @@ .prog_type = BPF_PROG_TYPE_TRACEPOINT, }, { + "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), |