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authorYonghong Song <yhs@fb.com>2020-08-24 23:46:09 -0700
committerAlexei Starovoitov <ast@kernel.org>2020-08-26 21:47:32 -0700
commitf5493c514cdbcd8c3f9f3ffca4f68b97f122e60a (patch)
tree4fe8df8ebf245dd886d1ee17c7bd65e5b4ca2e2b /tools
parent2921c90d471889242c24cff529043afb378937fa (diff)
downloadlinux-f5493c514cdbcd8c3f9f3ffca4f68b97f122e60a.tar.bz2
selftests/bpf: Add verifier tests for xor operation
Added some test_verifier bounds check test cases for xor operations. $ ./test_verifier ... #78/u bounds check for reg = 0, reg xor 1 OK #78/p bounds check for reg = 0, reg xor 1 OK #79/u bounds check for reg32 = 0, reg32 xor 1 OK #79/p bounds check for reg32 = 0, reg32 xor 1 OK #80/u bounds check for reg = 2, reg xor 3 OK #80/p bounds check for reg = 2, reg xor 3 OK #81/u bounds check for reg = any, reg xor 3 OK #81/p bounds check for reg = any, reg xor 3 OK #82/u bounds check for reg32 = any, reg32 xor 3 OK #82/p bounds check for reg32 = any, reg32 xor 3 OK #83/u bounds check for reg > 0, reg xor 3 OK #83/p bounds check for reg > 0, reg xor 3 OK #84/u bounds check for reg32 > 0, reg32 xor 3 OK #84/p bounds check for reg32 > 0, reg32 xor 3 OK ... Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Cc: John Fastabend <john.fastabend@gmail.com> Link: https://lore.kernel.org/bpf/20200825064609.2018077-1-yhs@fb.com
Diffstat (limited to 'tools')
-rw-r--r--tools/testing/selftests/bpf/verifier/bounds.c146
1 files changed, 146 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/verifier/bounds.c b/tools/testing/selftests/bpf/verifier/bounds.c
index 4d6645f2874c..dac40de3f868 100644
--- a/tools/testing/selftests/bpf/verifier/bounds.c
+++ b/tools/testing/selftests/bpf/verifier/bounds.c
@@ -557,3 +557,149 @@
.result = ACCEPT,
.flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
},
+{
+ "bounds check for reg = 0, reg xor 1",
+ .insns = {
+ BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
+ BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
+ BPF_LD_MAP_FD(BPF_REG_1, 0),
+ BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
+ BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1),
+ BPF_EXIT_INSN(),
+ BPF_MOV64_IMM(BPF_REG_1, 0),
+ BPF_ALU64_IMM(BPF_XOR, BPF_REG_1, 1),
+ BPF_JMP_IMM(BPF_JNE, BPF_REG_1, 0, 1),
+ BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_0, 8),
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ },
+ .fixup_map_hash_8b = { 3 },
+ .result = ACCEPT,
+},
+{
+ "bounds check for reg32 = 0, reg32 xor 1",
+ .insns = {
+ BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
+ BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
+ BPF_LD_MAP_FD(BPF_REG_1, 0),
+ BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
+ BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1),
+ BPF_EXIT_INSN(),
+ BPF_MOV32_IMM(BPF_REG_1, 0),
+ BPF_ALU32_IMM(BPF_XOR, BPF_REG_1, 1),
+ BPF_JMP32_IMM(BPF_JNE, BPF_REG_1, 0, 1),
+ BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_0, 8),
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ },
+ .fixup_map_hash_8b = { 3 },
+ .result = ACCEPT,
+},
+{
+ "bounds check for reg = 2, reg xor 3",
+ .insns = {
+ BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
+ BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
+ BPF_LD_MAP_FD(BPF_REG_1, 0),
+ BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
+ BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1),
+ BPF_EXIT_INSN(),
+ BPF_MOV64_IMM(BPF_REG_1, 2),
+ BPF_ALU64_IMM(BPF_XOR, BPF_REG_1, 3),
+ BPF_JMP_IMM(BPF_JGT, BPF_REG_1, 0, 1),
+ BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_0, 8),
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ },
+ .fixup_map_hash_8b = { 3 },
+ .result = ACCEPT,
+},
+{
+ "bounds check for reg = any, reg xor 3",
+ .insns = {
+ BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
+ BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
+ BPF_LD_MAP_FD(BPF_REG_1, 0),
+ BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
+ BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1),
+ BPF_EXIT_INSN(),
+ BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_0, 0),
+ BPF_ALU64_IMM(BPF_XOR, BPF_REG_1, 3),
+ BPF_JMP_IMM(BPF_JNE, BPF_REG_1, 0, 1),
+ BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_0, 8),
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ },
+ .fixup_map_hash_8b = { 3 },
+ .result = REJECT,
+ .errstr = "invalid access to map value",
+ .errstr_unpriv = "invalid access to map value",
+},
+{
+ "bounds check for reg32 = any, reg32 xor 3",
+ .insns = {
+ BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
+ BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
+ BPF_LD_MAP_FD(BPF_REG_1, 0),
+ BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
+ BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1),
+ BPF_EXIT_INSN(),
+ BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_0, 0),
+ BPF_ALU32_IMM(BPF_XOR, BPF_REG_1, 3),
+ BPF_JMP32_IMM(BPF_JNE, BPF_REG_1, 0, 1),
+ BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_0, 8),
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ },
+ .fixup_map_hash_8b = { 3 },
+ .result = REJECT,
+ .errstr = "invalid access to map value",
+ .errstr_unpriv = "invalid access to map value",
+},
+{
+ "bounds check for reg > 0, reg xor 3",
+ .insns = {
+ BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
+ BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
+ BPF_LD_MAP_FD(BPF_REG_1, 0),
+ BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
+ BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1),
+ BPF_EXIT_INSN(),
+ BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_0, 0),
+ BPF_JMP_IMM(BPF_JLE, BPF_REG_1, 0, 3),
+ BPF_ALU64_IMM(BPF_XOR, BPF_REG_1, 3),
+ BPF_JMP_IMM(BPF_JGE, BPF_REG_1, 0, 1),
+ BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_0, 8),
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ },
+ .fixup_map_hash_8b = { 3 },
+ .result = ACCEPT,
+},
+{
+ "bounds check for reg32 > 0, reg32 xor 3",
+ .insns = {
+ BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
+ BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
+ BPF_LD_MAP_FD(BPF_REG_1, 0),
+ BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
+ BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1),
+ BPF_EXIT_INSN(),
+ BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_0, 0),
+ BPF_JMP32_IMM(BPF_JLE, BPF_REG_1, 0, 3),
+ BPF_ALU32_IMM(BPF_XOR, BPF_REG_1, 3),
+ BPF_JMP32_IMM(BPF_JGE, BPF_REG_1, 0, 1),
+ BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_0, 8),
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ },
+ .fixup_map_hash_8b = { 3 },
+ .result = ACCEPT,
+},