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authorDaniel Borkmann <daniel@iogearbox.net>2017-07-02 02:13:31 +0200
committerDavid S. Miller <davem@davemloft.net>2017-07-03 02:22:52 -0700
commit6d191ed40d8d84ef0045cd44c75c63770e250f2d (patch)
treeea378960d06698fc503e5f1ccd6d1b9e4d74e306 /tools
parent43188702b3d98d2792969a3377a30957f05695e6 (diff)
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: Daniel Borkmann <daniel@iogearbox.net> Acked-by: John Fastabend <john.fastabend@gmail.com> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'tools')
-rw-r--r--tools/testing/selftests/bpf/test_verifier.c165
1 files changed, 165 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/test_verifier.c b/tools/testing/selftests/bpf/test_verifier.c
index 26f1eefdc782..404aec520812 100644
--- a/tools/testing/selftests/bpf/test_verifier.c
+++ b/tools/testing/selftests/bpf/test_verifier.c
@@ -2658,6 +2658,171 @@ static struct bpf_test tests[] = {
.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 = {
BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1,