Commit ac8786c7 authored by Luke Nelson's avatar Luke Nelson Committed by Daniel Borkmann

selftests: bpf: add tests for shifts by zero

There are currently no tests for ALU64 shift operations when the shift
amount is 0. This adds 6 new tests to make sure they are equivalent
to a no-op. The x32 JIT had such bugs that could have been caught by
these tests.

Cc: Xi Wang <xi.wang@gmail.com>
Signed-off-by: default avatarLuke Nelson <luke.r.nels@gmail.com>
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
parent 6fa632e7
...@@ -90,6 +90,91 @@ ...@@ -90,6 +90,91 @@
}, },
.result = ACCEPT, .result = ACCEPT,
}, },
{
"lsh64 by 0 imm",
.insns = {
BPF_LD_IMM64(BPF_REG_0, 1),
BPF_LD_IMM64(BPF_REG_1, 1),
BPF_ALU64_IMM(BPF_LSH, BPF_REG_1, 0),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 1, 1),
BPF_MOV64_IMM(BPF_REG_0, 2),
BPF_EXIT_INSN(),
},
.result = ACCEPT,
.retval = 1,
},
{
"rsh64 by 0 imm",
.insns = {
BPF_LD_IMM64(BPF_REG_0, 1),
BPF_LD_IMM64(BPF_REG_1, 0x100000000LL),
BPF_ALU64_REG(BPF_MOV, BPF_REG_2, BPF_REG_1),
BPF_ALU64_IMM(BPF_RSH, BPF_REG_1, 0),
BPF_JMP_REG(BPF_JEQ, BPF_REG_1, BPF_REG_2, 1),
BPF_MOV64_IMM(BPF_REG_0, 2),
BPF_EXIT_INSN(),
},
.result = ACCEPT,
.retval = 1,
},
{
"arsh64 by 0 imm",
.insns = {
BPF_LD_IMM64(BPF_REG_0, 1),
BPF_LD_IMM64(BPF_REG_1, 0x100000000LL),
BPF_ALU64_REG(BPF_MOV, BPF_REG_2, BPF_REG_1),
BPF_ALU64_IMM(BPF_ARSH, BPF_REG_1, 0),
BPF_JMP_REG(BPF_JEQ, BPF_REG_1, BPF_REG_2, 1),
BPF_MOV64_IMM(BPF_REG_0, 2),
BPF_EXIT_INSN(),
},
.result = ACCEPT,
.retval = 1,
},
{
"lsh64 by 0 reg",
.insns = {
BPF_LD_IMM64(BPF_REG_0, 1),
BPF_LD_IMM64(BPF_REG_1, 1),
BPF_LD_IMM64(BPF_REG_2, 0),
BPF_ALU64_REG(BPF_LSH, BPF_REG_1, BPF_REG_2),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 1, 1),
BPF_MOV64_IMM(BPF_REG_0, 2),
BPF_EXIT_INSN(),
},
.result = ACCEPT,
.retval = 1,
},
{
"rsh64 by 0 reg",
.insns = {
BPF_LD_IMM64(BPF_REG_0, 1),
BPF_LD_IMM64(BPF_REG_1, 0x100000000LL),
BPF_ALU64_REG(BPF_MOV, BPF_REG_2, BPF_REG_1),
BPF_LD_IMM64(BPF_REG_3, 0),
BPF_ALU64_REG(BPF_RSH, BPF_REG_1, BPF_REG_3),
BPF_JMP_REG(BPF_JEQ, BPF_REG_1, BPF_REG_2, 1),
BPF_MOV64_IMM(BPF_REG_0, 2),
BPF_EXIT_INSN(),
},
.result = ACCEPT,
.retval = 1,
},
{
"arsh64 by 0 reg",
.insns = {
BPF_LD_IMM64(BPF_REG_0, 1),
BPF_LD_IMM64(BPF_REG_1, 0x100000000LL),
BPF_ALU64_REG(BPF_MOV, BPF_REG_2, BPF_REG_1),
BPF_LD_IMM64(BPF_REG_3, 0),
BPF_ALU64_REG(BPF_ARSH, BPF_REG_1, BPF_REG_3),
BPF_JMP_REG(BPF_JEQ, BPF_REG_1, BPF_REG_2, 1),
BPF_MOV64_IMM(BPF_REG_0, 2),
BPF_EXIT_INSN(),
},
.result = ACCEPT,
.retval = 1,
},
{ {
"invalid 64-bit BPF_END", "invalid 64-bit BPF_END",
.insns = { .insns = {
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment