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提交 6d191ed4 编写于 作者: D Daniel Borkmann 提交者： David S. Miller
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bpf: add various test cases for verifier selftest 

Add couple of verifier test cases for x|imm += pkt_ptr, including the
imm += x extension.
Signed-off-by: NDaniel Borkmann <daniel@iogearbox.net>
Acked-by: NJohn Fastabend <john.fastabend@gmail.com>
Acked-by: NAlexei Starovoitov <ast@kernel.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
上级 43188702
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tools/testing/selftests/bpf/test_verifier.c
浏览文件 @ 6d191ed4
......@@ -2657,6 +2657,171 @@ static struct bpf_test tests[] = {
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
.flags = F_LOAD_WITH_STRICT_ALIGNMENT,
},
{
"direct packet access: test18 (imm += pkt_ptr, 1)",
.insns = {
BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1,
offsetof(struct __sk_buff, data)),
BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1,
offsetof(struct __sk_buff, data_end)),
BPF_MOV64_IMM(BPF_REG_0, 8),
BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_2),
BPF_JMP_REG(BPF_JGT, BPF_REG_0, BPF_REG_3, 1),
BPF_STX_MEM(BPF_B, BPF_REG_2, BPF_REG_2, 0),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
},
.result = ACCEPT,
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
},
{
"direct packet access: test19 (imm += pkt_ptr, 2)",
.insns = {
BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1,
offsetof(struct __sk_buff, data)),
BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1,
offsetof(struct __sk_buff, data_end)),
BPF_MOV64_REG(BPF_REG_0, BPF_REG_2),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 8),
BPF_JMP_REG(BPF_JGT, BPF_REG_0, BPF_REG_3, 3),
BPF_MOV64_IMM(BPF_REG_4, 4),
BPF_ALU64_REG(BPF_ADD, BPF_REG_4, BPF_REG_2),
BPF_STX_MEM(BPF_B, BPF_REG_4, BPF_REG_4, 0),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
},
.result = ACCEPT,
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
},
{
"direct packet access: test20 (x += pkt_ptr, 1)",
.insns = {
BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1,
offsetof(struct __sk_buff, data)),
BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1,
offsetof(struct __sk_buff, data_end)),
BPF_MOV64_IMM(BPF_REG_0, 0xffffffff),
BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_0, -8),
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_10, -8),
BPF_ALU64_IMM(BPF_AND, BPF_REG_0, 0xffff),
BPF_MOV64_REG(BPF_REG_4, BPF_REG_0),
BPF_ALU64_REG(BPF_ADD, BPF_REG_4, BPF_REG_2),
BPF_MOV64_REG(BPF_REG_5, BPF_REG_4),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_4, 0xffff - 1),
BPF_JMP_REG(BPF_JGT, BPF_REG_4, BPF_REG_3, 1),
BPF_STX_MEM(BPF_DW, BPF_REG_5, BPF_REG_4, 0),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
.result = ACCEPT,
},
{
"direct packet access: test21 (x += pkt_ptr, 2)",
.insns = {
BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1,
offsetof(struct __sk_buff, data)),
BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1,
offsetof(struct __sk_buff, data_end)),
BPF_MOV64_REG(BPF_REG_0, BPF_REG_2),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 8),
BPF_JMP_REG(BPF_JGT, BPF_REG_0, BPF_REG_3, 9),
BPF_MOV64_IMM(BPF_REG_4, 0xffffffff),
BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_4, -8),
BPF_LDX_MEM(BPF_DW, BPF_REG_4, BPF_REG_10, -8),
BPF_ALU64_IMM(BPF_AND, BPF_REG_4, 0xffff),
BPF_ALU64_REG(BPF_ADD, BPF_REG_4, BPF_REG_2),
BPF_MOV64_REG(BPF_REG_5, BPF_REG_4),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_4, 0xffff - 1),
BPF_JMP_REG(BPF_JGT, BPF_REG_4, BPF_REG_3, 1),
BPF_STX_MEM(BPF_DW, BPF_REG_5, BPF_REG_4, 0),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
.result = ACCEPT,
},
{
"direct packet access: test22 (x += pkt_ptr, 3)",
.insns = {
BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1,
offsetof(struct __sk_buff, data)),
BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1,
offsetof(struct __sk_buff, data_end)),
BPF_MOV64_REG(BPF_REG_0, BPF_REG_2),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 8),
BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_2, -8),
BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_3, -16),
BPF_LDX_MEM(BPF_DW, BPF_REG_3, BPF_REG_10, -16),
BPF_JMP_REG(BPF_JGT, BPF_REG_0, BPF_REG_3, 11),
BPF_LDX_MEM(BPF_DW, BPF_REG_2, BPF_REG_10, -8),
BPF_MOV64_IMM(BPF_REG_4, 0xffffffff),
BPF_STX_XADD(BPF_DW, BPF_REG_10, BPF_REG_4, -8),
BPF_LDX_MEM(BPF_DW, BPF_REG_4, BPF_REG_10, -8),
BPF_ALU64_IMM(BPF_RSH, BPF_REG_4, 48),
BPF_ALU64_REG(BPF_ADD, BPF_REG_4, BPF_REG_2),
BPF_MOV64_REG(BPF_REG_0, BPF_REG_4),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 2),
BPF_JMP_REG(BPF_JGT, BPF_REG_0, BPF_REG_3, 2),
BPF_MOV64_IMM(BPF_REG_2, 1),
BPF_STX_MEM(BPF_H, BPF_REG_4, BPF_REG_2, 0),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
.result = ACCEPT,
},
{
"direct packet access: test23 (x += pkt_ptr, 4)",
.insns = {
BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1,
offsetof(struct __sk_buff, data)),
BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1,
offsetof(struct __sk_buff, data_end)),
BPF_MOV64_IMM(BPF_REG_0, 0xffffffff),
BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_0, -8),
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_10, -8),
BPF_ALU64_IMM(BPF_AND, BPF_REG_0, 0xffff),
BPF_MOV64_REG(BPF_REG_4, BPF_REG_0),
BPF_MOV64_IMM(BPF_REG_0, 31),
BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_4),
BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_2),
BPF_MOV64_REG(BPF_REG_5, BPF_REG_0),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 0xffff - 1),
BPF_JMP_REG(BPF_JGT, BPF_REG_0, BPF_REG_3, 1),
BPF_STX_MEM(BPF_DW, BPF_REG_5, BPF_REG_0, 0),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
.result = REJECT,
.errstr = "cannot add integer value with 47 upper zero bits to ptr_to_packet",
},
{
"direct packet access: test24 (x += pkt_ptr, 5)",
.insns = {
BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1,
offsetof(struct __sk_buff, data)),
BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1,
offsetof(struct __sk_buff, data_end)),
BPF_MOV64_IMM(BPF_REG_0, 0xffffffff),
BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_0, -8),
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_10, -8),
BPF_ALU64_IMM(BPF_AND, BPF_REG_0, 0xff),
BPF_MOV64_REG(BPF_REG_4, BPF_REG_0),
BPF_MOV64_IMM(BPF_REG_0, 64),
BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_4),
BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_2),
BPF_MOV64_REG(BPF_REG_5, BPF_REG_0),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 0xffff - 1),
BPF_JMP_REG(BPF_JGT, BPF_REG_0, BPF_REG_3, 1),
BPF_STX_MEM(BPF_DW, BPF_REG_5, BPF_REG_0, 0),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
.result = ACCEPT,
},
{
"helper access to packet: test1, valid packet_ptr range",
.insns = {
......
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