[PATCH bpf] selftests: bpf: add zero extend checks for ALU32 and/or/xor
From: Björn Töpel <hidden>
Date: 2019-05-22 09:23:40
Also in:
bpf
Subsystem:
bpf [general] (safe dynamic programs and tools), bpf [selftests] (test runners & infrastructure), kernel selftest framework, the rest · Maintainers:
Alexei Starovoitov, Daniel Borkmann, Andrii Nakryiko, Eduard Zingerman, Kumar Kartikeya Dwivedi, Shuah Khan, Shuah Khan, Linus Torvalds
Add three tests to test_verifier/basic_instr that make sure that the high 32-bits of the destination register is cleared after an ALU32 and/or/xor. Signed-off-by: Björn Töpel <redacted> --- .../selftests/bpf/verifier/basic_instr.c | 39 +++++++++++++++++++ 1 file changed, 39 insertions(+)
diff --git a/tools/testing/selftests/bpf/verifier/basic_instr.c b/tools/testing/selftests/bpf/verifier/basic_instr.c
index ed91a7b9a456..4d844089938e 100644
--- a/tools/testing/selftests/bpf/verifier/basic_instr.c
+++ b/tools/testing/selftests/bpf/verifier/basic_instr.c@@ -132,3 +132,42 @@ .prog_type = BPF_PROG_TYPE_SCHED_CLS, .result = ACCEPT, }, +{ + "and32 reg zero extend check", + .insns = { + BPF_MOV64_IMM(BPF_REG_0, -1), + BPF_MOV64_IMM(BPF_REG_2, -2), + BPF_ALU32_REG(BPF_AND, BPF_REG_0, BPF_REG_2), + BPF_ALU64_IMM(BPF_RSH, BPF_REG_0, 32), + BPF_EXIT_INSN(), + }, + .prog_type = BPF_PROG_TYPE_SCHED_CLS, + .result = ACCEPT, + .retval = 0, +}, +{ + "or32 reg zero extend check", + .insns = { + BPF_MOV64_IMM(BPF_REG_0, -1), + BPF_MOV64_IMM(BPF_REG_2, -2), + BPF_ALU32_REG(BPF_OR, BPF_REG_0, BPF_REG_2), + BPF_ALU64_IMM(BPF_RSH, BPF_REG_0, 32), + BPF_EXIT_INSN(), + }, + .prog_type = BPF_PROG_TYPE_SCHED_CLS, + .result = ACCEPT, + .retval = 0, +}, +{ + "xor32 reg zero extend check", + .insns = { + BPF_MOV64_IMM(BPF_REG_0, -1), + BPF_MOV64_IMM(BPF_REG_2, 0), + BPF_ALU32_REG(BPF_XOR, BPF_REG_0, BPF_REG_2), + BPF_ALU64_IMM(BPF_RSH, BPF_REG_0, 32), + BPF_EXIT_INSN(), + }, + .prog_type = BPF_PROG_TYPE_SCHED_CLS, + .result = ACCEPT, + .retval = 0, +},
--
2.20.1