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authorBjörn Töpel <bjorn.topel@gmail.com>2019-05-22 11:23:23 +0200
committerDaniel Borkmann <daniel@iogearbox.net>2019-05-23 15:55:17 +0200
commit00d8304553de529802430799d2b2566fd32859d4 (patch)
tree473f9c1df30dac8de3b4ada7c41cfe0a3c8e1838 /tools
parentfe121ee531d1362810bfd30f38a1b88b1d3d376c (diff)
downloadblackbird-op-linux-00d8304553de529802430799d2b2566fd32859d4.tar.gz
blackbird-op-linux-00d8304553de529802430799d2b2566fd32859d4.zip
selftests: bpf: add zero extend checks for ALU32 and/or/xor
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 <bjorn.topel@gmail.com> Acked-by: Yonghong Song <yhs@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'tools')
-rw-r--r--tools/testing/selftests/bpf/verifier/basic_instr.c39
1 files changed, 39 insertions, 0 deletions
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,
+},
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