diff mbox series

[bpf-next,2/2] selftests/bpf: check if verifier tracks dst_reg bound for BPF_MOD

Message ID 20230306033119.2634976-3-xukuohai@huaweicloud.com (mailing list archive)
State Changes Requested
Delegated to: BPF
Headers show
Series bpf: add bound tracking for BPF_MOD | expand

Checks

Context Check Description
bpf/vmtest-bpf-next-VM_Test-1 success Logs for ShellCheck
bpf/vmtest-bpf-next-VM_Test-2 success Logs for build for aarch64 with gcc
bpf/vmtest-bpf-next-VM_Test-3 success Logs for build for aarch64 with llvm-17
bpf/vmtest-bpf-next-VM_Test-5 success Logs for build for x86_64 with gcc
bpf/vmtest-bpf-next-VM_Test-6 success Logs for build for x86_64 with llvm-17
bpf/vmtest-bpf-next-VM_Test-7 success Logs for llvm-toolchain
bpf/vmtest-bpf-next-VM_Test-8 success Logs for set-matrix
bpf/vmtest-bpf-next-VM_Test-4 success Logs for build for s390x with gcc
bpf/vmtest-bpf-next-VM_Test-9 success Logs for test_maps on aarch64 with gcc
bpf/vmtest-bpf-next-VM_Test-10 success Logs for test_maps on aarch64 with llvm-17
bpf/vmtest-bpf-next-VM_Test-12 success Logs for test_maps on x86_64 with gcc
bpf/vmtest-bpf-next-VM_Test-13 success Logs for test_maps on x86_64 with llvm-17
bpf/vmtest-bpf-next-VM_Test-14 success Logs for test_progs on aarch64 with gcc
bpf/vmtest-bpf-next-VM_Test-15 success Logs for test_progs on aarch64 with llvm-17
bpf/vmtest-bpf-next-VM_Test-17 success Logs for test_progs on x86_64 with gcc
bpf/vmtest-bpf-next-VM_Test-18 success Logs for test_progs on x86_64 with llvm-17
bpf/vmtest-bpf-next-VM_Test-19 success Logs for test_progs_no_alu32 on aarch64 with gcc
bpf/vmtest-bpf-next-VM_Test-20 success Logs for test_progs_no_alu32 on aarch64 with llvm-17
bpf/vmtest-bpf-next-VM_Test-22 success Logs for test_progs_no_alu32 on x86_64 with gcc
bpf/vmtest-bpf-next-VM_Test-23 success Logs for test_progs_no_alu32 on x86_64 with llvm-17
bpf/vmtest-bpf-next-VM_Test-24 success Logs for test_progs_no_alu32_parallel on aarch64 with gcc
bpf/vmtest-bpf-next-VM_Test-25 success Logs for test_progs_no_alu32_parallel on aarch64 with llvm-17
bpf/vmtest-bpf-next-VM_Test-27 success Logs for test_progs_no_alu32_parallel on x86_64 with gcc
bpf/vmtest-bpf-next-VM_Test-28 success Logs for test_progs_no_alu32_parallel on x86_64 with llvm-17
bpf/vmtest-bpf-next-VM_Test-29 success Logs for test_progs_parallel on aarch64 with gcc
bpf/vmtest-bpf-next-VM_Test-30 success Logs for test_progs_parallel on aarch64 with llvm-17
bpf/vmtest-bpf-next-VM_Test-32 success Logs for test_progs_parallel on x86_64 with gcc
bpf/vmtest-bpf-next-VM_Test-33 success Logs for test_progs_parallel on x86_64 with llvm-17
bpf/vmtest-bpf-next-VM_Test-34 success Logs for test_verifier on aarch64 with gcc
bpf/vmtest-bpf-next-VM_Test-35 success Logs for test_verifier on aarch64 with llvm-17
bpf/vmtest-bpf-next-VM_Test-37 success Logs for test_verifier on x86_64 with gcc
bpf/vmtest-bpf-next-VM_Test-38 success Logs for test_verifier on x86_64 with llvm-17
bpf/vmtest-bpf-next-VM_Test-21 success Logs for test_progs_no_alu32 on s390x with gcc
bpf/vmtest-bpf-next-VM_Test-26 success Logs for test_progs_no_alu32_parallel on s390x with gcc
bpf/vmtest-bpf-next-VM_Test-31 success Logs for test_progs_parallel on s390x with gcc
bpf/vmtest-bpf-next-VM_Test-36 success Logs for test_verifier on s390x with gcc
bpf/vmtest-bpf-next-VM_Test-16 success Logs for test_progs on s390x with gcc
bpf/vmtest-bpf-next-PR success PR summary
bpf/vmtest-bpf-next-VM_Test-11 success Logs for test_maps on s390x with gcc
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for bpf-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/cc_maintainers warning 5 maintainers not CCed: xukuohai@huawei.com davem@davemloft.net kuba@kernel.org netdev@vger.kernel.org hawk@kernel.org
netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/checkpatch warning WARNING: Missing or malformed SPDX-License-Identifier tag in line 1 WARNING: added, moved or deleted file(s), does MAINTAINERS need updating? WARNING: line length of 84 exceeds 80 columns
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Xu Kuohai March 6, 2023, 3:31 a.m. UTC 
From: Xu Kuohai <xukuohai@huawei.com>

Test cases to check if verifier tracks dst_reg bound for BPF_MOD.

Signed-off-by: Xu Kuohai <xukuohai@huawei.com>
---
 tools/testing/selftests/bpf/verifier/mod.c | 247 +++++++++++++++++++++
 1 file changed, 247 insertions(+)
 create mode 100644 tools/testing/selftests/bpf/verifier/mod.c
diff mbox series

Patch

diff --git a/tools/testing/selftests/bpf/verifier/mod.c b/tools/testing/selftests/bpf/verifier/mod.c
new file mode 100644
index 000000000000..717e4cd08e59
--- /dev/null
+++ b/tools/testing/selftests/bpf/verifier/mod.c
@@ -0,0 +1,247 @@ 
+{
+	"mod64 positive imm",
+	.insns = {
+	BPF_MOV64_IMM(BPF_REG_0, 0),
+	BPF_ALU64_IMM(BPF_MOD, BPF_REG_0, 1),
+
+	BPF_MOV64_IMM(BPF_REG_1, 0),
+	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 1),
+	BPF_JMP_REG(BPF_JLT, BPF_REG_1, BPF_REG_0, -2),
+
+	BPF_EXIT_INSN(),
+	},
+	.result = ACCEPT,
+	.prog_type = BPF_PROG_TYPE_XDP,
+},
+{
+	"mod64 positive reg",
+	.insns = {
+	BPF_MOV64_IMM(BPF_REG_0, 0),
+	BPF_MOV64_IMM(BPF_REG_1, 1),
+	BPF_ALU64_REG(BPF_MOD, BPF_REG_0, BPF_REG_1),
+
+	BPF_MOV64_IMM(BPF_REG_1, 0),
+	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 1),
+	BPF_JMP_REG(BPF_JLT, BPF_REG_1, BPF_REG_0, -2),
+
+	BPF_EXIT_INSN(),
+	},
+	.result = ACCEPT,
+	.prog_type = BPF_PROG_TYPE_XDP,
+},
+{
+	"mod64 zero",
+	.insns = {
+	BPF_MOV64_IMM(BPF_REG_0, 0),
+	BPF_MOV64_IMM(BPF_REG_1, 0),
+	BPF_ALU64_REG(BPF_MOD, BPF_REG_0, BPF_REG_1),
+
+	BPF_MOV64_IMM(BPF_REG_1, 0),
+	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 1),
+	BPF_JMP_REG(BPF_JLT, BPF_REG_1, BPF_REG_0, -2),
+
+	BPF_EXIT_INSN(),
+	},
+	.result = ACCEPT,
+	.prog_type = BPF_PROG_TYPE_XDP,
+},
+{
+	"mod64 negative 1",
+	.insns = {
+	BPF_MOV64_IMM(BPF_REG_0, 1),
+	BPF_MOV64_IMM(BPF_REG_1, -1),
+	BPF_ALU64_REG(BPF_MOD, BPF_REG_0, BPF_REG_1),
+
+	BPF_MOV64_IMM(BPF_REG_1, 0),
+	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 1),
+	BPF_JMP_REG(BPF_JLT, BPF_REG_1, BPF_REG_0, -2),
+
+	BPF_EXIT_INSN(),
+	},
+	.result = ACCEPT,
+	.prog_type = BPF_PROG_TYPE_XDP,
+	.retval = 1,
+},
+{
+	"mod64 negative 2",
+	.insns = {
+	BPF_MOV64_IMM(BPF_REG_0, -4),
+	BPF_MOV32_IMM(BPF_REG_1, 5),
+	BPF_ALU64_REG(BPF_MOD, BPF_REG_0, BPF_REG_1),
+
+	BPF_MOV64_IMM(BPF_REG_1, 0),
+	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 1),
+	BPF_JMP_REG(BPF_JLT, BPF_REG_1, BPF_REG_0, -2),
+
+	BPF_EXIT_INSN(),
+	},
+	.result = ACCEPT,
+	.prog_type = BPF_PROG_TYPE_XDP,
+	.retval = 2,
+},
+{
+	"mod64 negative 3",
+	.insns = {
+	BPF_MOV32_IMM(BPF_REG_0, -4),
+	BPF_MOV32_IMM(BPF_REG_1, -5),
+	BPF_ALU64_REG(BPF_MOD, BPF_REG_0, BPF_REG_1),
+
+	BPF_MOV64_IMM(BPF_REG_1, 0),
+	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 1),
+	BPF_JMP_REG(BPF_JLT, BPF_REG_1, BPF_REG_0, -2),
+
+	BPF_EXIT_INSN(),
+	},
+	.result = ACCEPT,
+	.prog_type = BPF_PROG_TYPE_XDP,
+	.retval = 1,
+},
+{
+	"mod64 variable dividend cross signed boundary",
+	.insns = {
+	BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1, offsetof(struct xdp_md, data)),
+	BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1, offsetof(struct xdp_md, data_end)),
+	BPF_MOV64_REG(BPF_REG_1, BPF_REG_2),
+	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 1),
+	BPF_JMP_REG(BPF_JGT, BPF_REG_1, BPF_REG_3, 11),
+
+	BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_2, 0),
+	BPF_LD_IMM64(BPF_REG_0, 0x7fffffffffffff10),
+	BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_0),
+	BPF_LD_IMM64(BPF_REG_0, 0x80000000000000ff),
+	BPF_ALU64_REG(BPF_MOD, BPF_REG_1, BPF_REG_0),
+
+	BPF_LD_IMM64(BPF_REG_0, 0x8000000000000000),
+	BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 1),
+	BPF_JMP_REG(BPF_JSLT, BPF_REG_0, BPF_REG_1, -2),
+
+	BPF_MOV64_IMM(BPF_REG_0, 0),
+	BPF_EXIT_INSN(),
+	},
+	.errstr = "BPF program is too large.",
+	.result = REJECT,
+	.prog_type = BPF_PROG_TYPE_XDP,
+},
+{
+	"mod32 positive imm",
+	.insns = {
+	BPF_MOV32_IMM(BPF_REG_0, 0),
+	BPF_ALU32_IMM(BPF_MOD, BPF_REG_0, 1),
+
+	BPF_MOV64_IMM(BPF_REG_1, 0),
+	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 1),
+	BPF_JMP_REG(BPF_JLT, BPF_REG_1, BPF_REG_0, -2),
+
+	BPF_EXIT_INSN(),
+	},
+	.result = ACCEPT,
+	.prog_type = BPF_PROG_TYPE_XDP,
+},
+{
+	"mod32 positive reg",
+	.insns = {
+	BPF_MOV32_IMM(BPF_REG_0, 0),
+	BPF_MOV32_IMM(BPF_REG_1, 1),
+	BPF_ALU32_REG(BPF_MOD, BPF_REG_0, BPF_REG_1),
+
+	BPF_MOV64_IMM(BPF_REG_1, 0),
+	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 1),
+	BPF_JMP_REG(BPF_JLT, BPF_REG_1, BPF_REG_0, -2),
+
+	BPF_EXIT_INSN(),
+	},
+	.result = ACCEPT,
+	.prog_type = BPF_PROG_TYPE_XDP,
+},
+{
+	"mod32 zero",
+	.insns = {
+	BPF_MOV32_IMM(BPF_REG_0, 0),
+	BPF_MOV32_IMM(BPF_REG_1, 0),
+	BPF_ALU32_REG(BPF_MOD, BPF_REG_0, BPF_REG_1),
+
+	BPF_MOV64_IMM(BPF_REG_1, 0),
+	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 1),
+	BPF_JMP_REG(BPF_JLT, BPF_REG_1, BPF_REG_0, -2),
+
+	BPF_EXIT_INSN(),
+	},
+	.result = ACCEPT,
+	.prog_type = BPF_PROG_TYPE_XDP,
+},
+{
+	"mod32 negative 1",
+	.insns = {
+	BPF_MOV32_IMM(BPF_REG_0, 1),
+	BPF_MOV32_IMM(BPF_REG_1, -1),
+	BPF_ALU32_REG(BPF_MOD, BPF_REG_0, BPF_REG_1),
+
+	BPF_MOV64_IMM(BPF_REG_1, 0),
+	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 1),
+	BPF_JMP_REG(BPF_JLT, BPF_REG_1, BPF_REG_0, -2),
+
+	BPF_EXIT_INSN(),
+	},
+	.result = ACCEPT,
+	.prog_type = BPF_PROG_TYPE_XDP,
+	.retval = 1,
+},
+{
+	"mod32 negative 2",
+	.insns = {
+	BPF_MOV32_IMM(BPF_REG_0, -4),
+	BPF_MOV32_IMM(BPF_REG_1, 5),
+	BPF_ALU32_REG(BPF_MOD, BPF_REG_0, BPF_REG_1),
+
+	BPF_MOV64_IMM(BPF_REG_1, 0),
+	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 1),
+	BPF_JMP_REG(BPF_JLT, BPF_REG_1, BPF_REG_0, -2),
+
+	BPF_EXIT_INSN(),
+	},
+	.result = ACCEPT,
+	.prog_type = BPF_PROG_TYPE_XDP,
+	.retval = 2,
+},
+{
+	"mod32 negative 3",
+	.insns = {
+	BPF_MOV32_IMM(BPF_REG_0, -4),
+	BPF_MOV32_IMM(BPF_REG_1, -5),
+	BPF_ALU32_REG(BPF_MOD, BPF_REG_0, BPF_REG_1),
+
+	BPF_MOV64_IMM(BPF_REG_1, 0),
+	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 1),
+	BPF_JMP_REG(BPF_JLT, BPF_REG_1, BPF_REG_0, -2),
+
+	BPF_EXIT_INSN(),
+	},
+	.result = ACCEPT,
+	.prog_type = BPF_PROG_TYPE_XDP,
+	.retval = 1,
+},
+{
+	"mod32 variable dividend cross signed boundary",
+	.insns = {
+	BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1, offsetof(struct xdp_md, data)),
+	BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1, offsetof(struct xdp_md, data_end)),
+	BPF_MOV64_REG(BPF_REG_1, BPF_REG_2),
+	BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 1),
+	BPF_JMP_REG(BPF_JGT, BPF_REG_1, BPF_REG_3, 7),
+
+	BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_2, 0),
+	BPF_MOV64_IMM(BPF_REG_0, 0x7fffff10),
+	BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_0),
+	BPF_ALU32_IMM(BPF_MOD, BPF_REG_1, 0x800000ff),
+
+	BPF_MOV32_IMM(BPF_REG_0, 0x80000000),
+	BPF_ALU32_IMM(BPF_ADD, BPF_REG_0, 1),
+	BPF_JMP32_REG(BPF_JSLT, BPF_REG_0, BPF_REG_1, -2),
+
+	BPF_MOV64_IMM(BPF_REG_0, 0),
+	BPF_EXIT_INSN(),
+	},
+	.errstr = "BPF program is too large.",
+	.result = REJECT,
+	.prog_type = BPF_PROG_TYPE_XDP,
+},