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-rw-r--r--tools/testing/selftests/bpf/test_sysctl.c485
1 files changed, 485 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/test_sysctl.c b/tools/testing/selftests/bpf/test_sysctl.c
index 43008aae32d3..885675480af9 100644
--- a/tools/testing/selftests/bpf/test_sysctl.c
+++ b/tools/testing/selftests/bpf/test_sysctl.c
@@ -817,6 +817,491 @@ static struct sysctl_test tests[] = {
.newval = "606",
.result = SUCCESS,
},
+ {
+ "bpf_strtoul one number string",
+ .insns = {
+ /* arg1 (buf) */
+ BPF_MOV64_REG(BPF_REG_7, BPF_REG_10),
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_7, -8),
+ BPF_MOV64_IMM(BPF_REG_0, 0x00303036),
+ BPF_STX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 0),
+
+ BPF_MOV64_REG(BPF_REG_1, BPF_REG_7),
+
+ /* arg2 (buf_len) */
+ BPF_MOV64_IMM(BPF_REG_2, 4),
+
+ /* arg3 (flags) */
+ BPF_MOV64_IMM(BPF_REG_3, 0),
+
+ /* arg4 (res) */
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_7, -8),
+ BPF_STX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 0),
+ BPF_MOV64_REG(BPF_REG_4, BPF_REG_7),
+
+ BPF_EMIT_CALL(BPF_FUNC_strtoul),
+
+ /* if (ret == expected && */
+ BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 3, 4),
+ /* res == expected) */
+ BPF_LDX_MEM(BPF_DW, BPF_REG_9, BPF_REG_7, 0),
+ BPF_JMP_IMM(BPF_JNE, BPF_REG_9, 600, 2),
+
+ /* return ALLOW; */
+ BPF_MOV64_IMM(BPF_REG_0, 1),
+ BPF_JMP_A(1),
+
+ /* else return DENY; */
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ },
+ .attach_type = BPF_CGROUP_SYSCTL,
+ .sysctl = "net/ipv4/route/mtu_expires",
+ .open_flags = O_RDONLY,
+ .result = SUCCESS,
+ },
+ {
+ "bpf_strtoul multi number string",
+ .insns = {
+ /* arg1 (buf) */
+ BPF_MOV64_REG(BPF_REG_7, BPF_REG_10),
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_7, -8),
+ /* "600 602\0" */
+ BPF_LD_IMM64(BPF_REG_0, 0x0032303620303036ULL),
+ BPF_STX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 0),
+ BPF_MOV64_REG(BPF_REG_1, BPF_REG_7),
+
+ /* arg2 (buf_len) */
+ BPF_MOV64_IMM(BPF_REG_2, 8),
+
+ /* arg3 (flags) */
+ BPF_MOV64_IMM(BPF_REG_3, 0),
+
+ /* arg4 (res) */
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_7, -8),
+ BPF_STX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 0),
+ BPF_MOV64_REG(BPF_REG_4, BPF_REG_7),
+
+ BPF_EMIT_CALL(BPF_FUNC_strtoul),
+
+ /* if (ret == expected && */
+ BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 3, 18),
+ /* res == expected) */
+ BPF_LDX_MEM(BPF_DW, BPF_REG_9, BPF_REG_7, 0),
+ BPF_JMP_IMM(BPF_JNE, BPF_REG_9, 600, 16),
+
+ /* arg1 (buf) */
+ BPF_MOV64_REG(BPF_REG_7, BPF_REG_10),
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_7, -8),
+ BPF_ALU64_REG(BPF_ADD, BPF_REG_7, BPF_REG_0),
+ BPF_MOV64_REG(BPF_REG_1, BPF_REG_7),
+
+ /* arg2 (buf_len) */
+ BPF_MOV64_IMM(BPF_REG_2, 8),
+ BPF_ALU64_REG(BPF_SUB, BPF_REG_2, BPF_REG_0),
+
+ /* arg3 (flags) */
+ BPF_MOV64_IMM(BPF_REG_3, 0),
+
+ /* arg4 (res) */
+ BPF_MOV64_REG(BPF_REG_7, BPF_REG_10),
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_7, -16),
+ BPF_MOV64_REG(BPF_REG_4, BPF_REG_7),
+
+ BPF_EMIT_CALL(BPF_FUNC_strtoul),
+
+ /* if (ret == expected && */
+ BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 4, 4),
+ /* res == expected) */
+ BPF_LDX_MEM(BPF_DW, BPF_REG_9, BPF_REG_7, 0),
+ BPF_JMP_IMM(BPF_JNE, BPF_REG_9, 602, 2),
+
+ /* return ALLOW; */
+ BPF_MOV64_IMM(BPF_REG_0, 1),
+ BPF_JMP_A(1),
+
+ /* else return DENY; */
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ },
+ .attach_type = BPF_CGROUP_SYSCTL,
+ .sysctl = "net/ipv4/tcp_mem",
+ .open_flags = O_RDONLY,
+ .result = SUCCESS,
+ },
+ {
+ "bpf_strtoul buf_len = 0, reject",
+ .insns = {
+ /* arg1 (buf) */
+ BPF_MOV64_REG(BPF_REG_7, BPF_REG_10),
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_7, -8),
+ BPF_MOV64_IMM(BPF_REG_0, 0x00303036),
+ BPF_STX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 0),
+
+ BPF_MOV64_REG(BPF_REG_1, BPF_REG_7),
+
+ /* arg2 (buf_len) */
+ BPF_MOV64_IMM(BPF_REG_2, 0),
+
+ /* arg3 (flags) */
+ BPF_MOV64_IMM(BPF_REG_3, 0),
+
+ /* arg4 (res) */
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_7, -8),
+ BPF_STX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 0),
+ BPF_MOV64_REG(BPF_REG_4, BPF_REG_7),
+
+ BPF_EMIT_CALL(BPF_FUNC_strtoul),
+
+ BPF_MOV64_IMM(BPF_REG_0, 1),
+ BPF_EXIT_INSN(),
+ },
+ .attach_type = BPF_CGROUP_SYSCTL,
+ .sysctl = "net/ipv4/route/mtu_expires",
+ .open_flags = O_RDONLY,
+ .result = LOAD_REJECT,
+ },
+ {
+ "bpf_strtoul supported base, ok",
+ .insns = {
+ /* arg1 (buf) */
+ BPF_MOV64_REG(BPF_REG_7, BPF_REG_10),
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_7, -8),
+ BPF_MOV64_IMM(BPF_REG_0, 0x00373730),
+ BPF_STX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 0),
+
+ BPF_MOV64_REG(BPF_REG_1, BPF_REG_7),
+
+ /* arg2 (buf_len) */
+ BPF_MOV64_IMM(BPF_REG_2, 4),
+
+ /* arg3 (flags) */
+ BPF_MOV64_IMM(BPF_REG_3, 8),
+
+ /* arg4 (res) */
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_7, -8),
+ BPF_STX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 0),
+ BPF_MOV64_REG(BPF_REG_4, BPF_REG_7),
+
+ BPF_EMIT_CALL(BPF_FUNC_strtoul),
+
+ /* if (ret == expected && */
+ BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 3, 4),
+ /* res == expected) */
+ BPF_LDX_MEM(BPF_DW, BPF_REG_9, BPF_REG_7, 0),
+ BPF_JMP_IMM(BPF_JNE, BPF_REG_9, 63, 2),
+
+ /* return ALLOW; */
+ BPF_MOV64_IMM(BPF_REG_0, 1),
+ BPF_JMP_A(1),
+
+ /* else return DENY; */
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ },
+ .attach_type = BPF_CGROUP_SYSCTL,
+ .sysctl = "net/ipv4/route/mtu_expires",
+ .open_flags = O_RDONLY,
+ .result = SUCCESS,
+ },
+ {
+ "bpf_strtoul unsupported base, EINVAL",
+ .insns = {
+ /* arg1 (buf) */
+ BPF_MOV64_REG(BPF_REG_7, BPF_REG_10),
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_7, -8),
+ BPF_MOV64_IMM(BPF_REG_0, 0x00303036),
+ BPF_STX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 0),
+
+ BPF_MOV64_REG(BPF_REG_1, BPF_REG_7),
+
+ /* arg2 (buf_len) */
+ BPF_MOV64_IMM(BPF_REG_2, 4),
+
+ /* arg3 (flags) */
+ BPF_MOV64_IMM(BPF_REG_3, 3),
+
+ /* arg4 (res) */
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_7, -8),
+ BPF_STX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 0),
+ BPF_MOV64_REG(BPF_REG_4, BPF_REG_7),
+
+ BPF_EMIT_CALL(BPF_FUNC_strtoul),
+
+ /* if (ret == expected) */
+ BPF_JMP_IMM(BPF_JNE, BPF_REG_0, -EINVAL, 2),
+
+ /* return ALLOW; */
+ BPF_MOV64_IMM(BPF_REG_0, 1),
+ BPF_JMP_A(1),
+
+ /* else return DENY; */
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ },
+ .attach_type = BPF_CGROUP_SYSCTL,
+ .sysctl = "net/ipv4/route/mtu_expires",
+ .open_flags = O_RDONLY,
+ .result = SUCCESS,
+ },
+ {
+ "bpf_strtoul buf with spaces only, EINVAL",
+ .insns = {
+ /* arg1 (buf) */
+ BPF_MOV64_REG(BPF_REG_7, BPF_REG_10),
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_7, -8),
+ BPF_MOV64_IMM(BPF_REG_0, 0x090a0c0d),
+ BPF_STX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 0),
+
+ BPF_MOV64_REG(BPF_REG_1, BPF_REG_7),
+
+ /* arg2 (buf_len) */
+ BPF_MOV64_IMM(BPF_REG_2, 4),
+
+ /* arg3 (flags) */
+ BPF_MOV64_IMM(BPF_REG_3, 0),
+
+ /* arg4 (res) */
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_7, -8),
+ BPF_STX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 0),
+ BPF_MOV64_REG(BPF_REG_4, BPF_REG_7),
+
+ BPF_EMIT_CALL(BPF_FUNC_strtoul),
+
+ /* if (ret == expected) */
+ BPF_JMP_IMM(BPF_JNE, BPF_REG_0, -EINVAL, 2),
+
+ /* return ALLOW; */
+ BPF_MOV64_IMM(BPF_REG_0, 1),
+ BPF_JMP_A(1),
+
+ /* else return DENY; */
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ },
+ .attach_type = BPF_CGROUP_SYSCTL,
+ .sysctl = "net/ipv4/route/mtu_expires",
+ .open_flags = O_RDONLY,
+ .result = SUCCESS,
+ },
+ {
+ "bpf_strtoul negative number, EINVAL",
+ .insns = {
+ /* arg1 (buf) */
+ BPF_MOV64_REG(BPF_REG_7, BPF_REG_10),
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_7, -8),
+ BPF_MOV64_IMM(BPF_REG_0, 0x00362d0a), /* " -6\0" */
+ BPF_STX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 0),
+
+ BPF_MOV64_REG(BPF_REG_1, BPF_REG_7),
+
+ /* arg2 (buf_len) */
+ BPF_MOV64_IMM(BPF_REG_2, 4),
+
+ /* arg3 (flags) */
+ BPF_MOV64_IMM(BPF_REG_3, 0),
+
+ /* arg4 (res) */
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_7, -8),
+ BPF_STX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 0),
+ BPF_MOV64_REG(BPF_REG_4, BPF_REG_7),
+
+ BPF_EMIT_CALL(BPF_FUNC_strtoul),
+
+ /* if (ret == expected) */
+ BPF_JMP_IMM(BPF_JNE, BPF_REG_0, -EINVAL, 2),
+
+ /* return ALLOW; */
+ BPF_MOV64_IMM(BPF_REG_0, 1),
+ BPF_JMP_A(1),
+
+ /* else return DENY; */
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ },
+ .attach_type = BPF_CGROUP_SYSCTL,
+ .sysctl = "net/ipv4/route/mtu_expires",
+ .open_flags = O_RDONLY,
+ .result = SUCCESS,
+ },
+ {
+ "bpf_strtol negative number, ok",
+ .insns = {
+ /* arg1 (buf) */
+ BPF_MOV64_REG(BPF_REG_7, BPF_REG_10),
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_7, -8),
+ BPF_MOV64_IMM(BPF_REG_0, 0x00362d0a), /* " -6\0" */
+ BPF_STX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 0),
+
+ BPF_MOV64_REG(BPF_REG_1, BPF_REG_7),
+
+ /* arg2 (buf_len) */
+ BPF_MOV64_IMM(BPF_REG_2, 4),
+
+ /* arg3 (flags) */
+ BPF_MOV64_IMM(BPF_REG_3, 10),
+
+ /* arg4 (res) */
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_7, -8),
+ BPF_STX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 0),
+ BPF_MOV64_REG(BPF_REG_4, BPF_REG_7),
+
+ BPF_EMIT_CALL(BPF_FUNC_strtol),
+
+ /* if (ret == expected && */
+ BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 3, 4),
+ /* res == expected) */
+ BPF_LDX_MEM(BPF_DW, BPF_REG_9, BPF_REG_7, 0),
+ BPF_JMP_IMM(BPF_JNE, BPF_REG_9, -6, 2),
+
+ /* return ALLOW; */
+ BPF_MOV64_IMM(BPF_REG_0, 1),
+ BPF_JMP_A(1),
+
+ /* else return DENY; */
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ },
+ .attach_type = BPF_CGROUP_SYSCTL,
+ .sysctl = "net/ipv4/route/mtu_expires",
+ .open_flags = O_RDONLY,
+ .result = SUCCESS,
+ },
+ {
+ "bpf_strtol hex number, ok",
+ .insns = {
+ /* arg1 (buf) */
+ BPF_MOV64_REG(BPF_REG_7, BPF_REG_10),
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_7, -8),
+ BPF_MOV64_IMM(BPF_REG_0, 0x65667830), /* "0xfe" */
+ BPF_STX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 0),
+
+ BPF_MOV64_REG(BPF_REG_1, BPF_REG_7),
+
+ /* arg2 (buf_len) */
+ BPF_MOV64_IMM(BPF_REG_2, 4),
+
+ /* arg3 (flags) */
+ BPF_MOV64_IMM(BPF_REG_3, 0),
+
+ /* arg4 (res) */
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_7, -8),
+ BPF_STX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 0),
+ BPF_MOV64_REG(BPF_REG_4, BPF_REG_7),
+
+ BPF_EMIT_CALL(BPF_FUNC_strtol),
+
+ /* if (ret == expected && */
+ BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 4, 4),
+ /* res == expected) */
+ BPF_LDX_MEM(BPF_DW, BPF_REG_9, BPF_REG_7, 0),
+ BPF_JMP_IMM(BPF_JNE, BPF_REG_9, 254, 2),
+
+ /* return ALLOW; */
+ BPF_MOV64_IMM(BPF_REG_0, 1),
+ BPF_JMP_A(1),
+
+ /* else return DENY; */
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ },
+ .attach_type = BPF_CGROUP_SYSCTL,
+ .sysctl = "net/ipv4/route/mtu_expires",
+ .open_flags = O_RDONLY,
+ .result = SUCCESS,
+ },
+ {
+ "bpf_strtol max long",
+ .insns = {
+ /* arg1 (buf) 9223372036854775807 */
+ BPF_MOV64_REG(BPF_REG_7, BPF_REG_10),
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_7, -24),
+ BPF_LD_IMM64(BPF_REG_0, 0x3032373333323239ULL),
+ BPF_STX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 0),
+ BPF_LD_IMM64(BPF_REG_0, 0x3537373435383633ULL),
+ BPF_STX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 8),
+ BPF_LD_IMM64(BPF_REG_0, 0x0000000000373038ULL),
+ BPF_STX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 16),
+
+ BPF_MOV64_REG(BPF_REG_1, BPF_REG_7),
+
+ /* arg2 (buf_len) */
+ BPF_MOV64_IMM(BPF_REG_2, 19),
+
+ /* arg3 (flags) */
+ BPF_MOV64_IMM(BPF_REG_3, 0),
+
+ /* arg4 (res) */
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_7, -8),
+ BPF_STX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 0),
+ BPF_MOV64_REG(BPF_REG_4, BPF_REG_7),
+
+ BPF_EMIT_CALL(BPF_FUNC_strtol),
+
+ /* if (ret == expected && */
+ BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 19, 6),
+ /* res == expected) */
+ BPF_LD_IMM64(BPF_REG_8, 0x7fffffffffffffffULL),
+ BPF_LDX_MEM(BPF_DW, BPF_REG_9, BPF_REG_7, 0),
+ BPF_JMP_REG(BPF_JNE, BPF_REG_8, BPF_REG_9, 2),
+
+ /* return ALLOW; */
+ BPF_MOV64_IMM(BPF_REG_0, 1),
+ BPF_JMP_A(1),
+
+ /* else return DENY; */
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ },
+ .attach_type = BPF_CGROUP_SYSCTL,
+ .sysctl = "net/ipv4/route/mtu_expires",
+ .open_flags = O_RDONLY,
+ .result = SUCCESS,
+ },
+ {
+ "bpf_strtol overflow, ERANGE",
+ .insns = {
+ /* arg1 (buf) 9223372036854775808 */
+ BPF_MOV64_REG(BPF_REG_7, BPF_REG_10),
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_7, -24),
+ BPF_LD_IMM64(BPF_REG_0, 0x3032373333323239ULL),
+ BPF_STX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 0),
+ BPF_LD_IMM64(BPF_REG_0, 0x3537373435383633ULL),
+ BPF_STX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 8),
+ BPF_LD_IMM64(BPF_REG_0, 0x0000000000383038ULL),
+ BPF_STX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 16),
+
+ BPF_MOV64_REG(BPF_REG_1, BPF_REG_7),
+
+ /* arg2 (buf_len) */
+ BPF_MOV64_IMM(BPF_REG_2, 19),
+
+ /* arg3 (flags) */
+ BPF_MOV64_IMM(BPF_REG_3, 0),
+
+ /* arg4 (res) */
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_7, -8),
+ BPF_STX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 0),
+ BPF_MOV64_REG(BPF_REG_4, BPF_REG_7),
+
+ BPF_EMIT_CALL(BPF_FUNC_strtol),
+
+ /* if (ret == expected) */
+ BPF_JMP_IMM(BPF_JNE, BPF_REG_0, -ERANGE, 2),
+
+ /* return ALLOW; */
+ BPF_MOV64_IMM(BPF_REG_0, 1),
+ BPF_JMP_A(1),
+
+ /* else return DENY; */
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ },
+ .attach_type = BPF_CGROUP_SYSCTL,
+ .sysctl = "net/ipv4/route/mtu_expires",
+ .open_flags = O_RDONLY,
+ .result = SUCCESS,
+ },
};
static size_t probe_prog_length(const struct bpf_insn *fp)
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.