summaryrefslogtreecommitdiffstats
path: root/tools/testing/selftests/bpf/verifier/map_ptr.c
diff options
context:
space:
mode:
Diffstat (limited to 'tools/testing/selftests/bpf/verifier/map_ptr.c')
-rw-r--r--tools/testing/selftests/bpf/verifier/map_ptr.c99
1 files changed, 99 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/verifier/map_ptr.c b/tools/testing/selftests/bpf/verifier/map_ptr.c
new file mode 100644
index 000000000..1f8202142
--- /dev/null
+++ b/tools/testing/selftests/bpf/verifier/map_ptr.c
@@ -0,0 +1,99 @@
+{
+ "bpf_map_ptr: read with negative offset rejected",
+ .insns = {
+ BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
+ BPF_LD_MAP_FD(BPF_REG_1, 0),
+ BPF_LDX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, -8),
+ BPF_MOV64_IMM(BPF_REG_0, 1),
+ BPF_EXIT_INSN(),
+ },
+ .fixup_map_array_48b = { 1 },
+ .result_unpriv = REJECT,
+ .errstr_unpriv = "bpf_array access is allowed only to CAP_PERFMON and CAP_SYS_ADMIN",
+ .result = REJECT,
+ .errstr = "R1 is bpf_array invalid negative access: off=-8",
+},
+{
+ "bpf_map_ptr: write rejected",
+ .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_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_2, 0),
+ BPF_MOV64_IMM(BPF_REG_0, 1),
+ BPF_EXIT_INSN(),
+ },
+ .fixup_map_array_48b = { 3 },
+ .result_unpriv = REJECT,
+ .errstr_unpriv = "bpf_array access is allowed only to CAP_PERFMON and CAP_SYS_ADMIN",
+ .result = REJECT,
+ .errstr = "only read from bpf_array is supported",
+},
+{
+ "bpf_map_ptr: read non-existent field rejected",
+ .insns = {
+ BPF_MOV64_IMM(BPF_REG_6, 0),
+ BPF_LD_MAP_FD(BPF_REG_1, 0),
+ BPF_LDX_MEM(BPF_W, BPF_REG_6, BPF_REG_1, 1),
+ BPF_MOV64_IMM(BPF_REG_0, 1),
+ BPF_EXIT_INSN(),
+ },
+ .fixup_map_array_48b = { 1 },
+ .result_unpriv = REJECT,
+ .errstr_unpriv = "bpf_array access is allowed only to CAP_PERFMON and CAP_SYS_ADMIN",
+ .result = REJECT,
+ .errstr = "cannot access ptr member ops with moff 0 in struct bpf_map with off 1 size 4",
+ .flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
+},
+{
+ "bpf_map_ptr: read ops field accepted",
+ .insns = {
+ BPF_MOV64_IMM(BPF_REG_6, 0),
+ BPF_LD_MAP_FD(BPF_REG_1, 0),
+ BPF_LDX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0),
+ BPF_MOV64_IMM(BPF_REG_0, 1),
+ BPF_EXIT_INSN(),
+ },
+ .fixup_map_array_48b = { 1 },
+ .result_unpriv = REJECT,
+ .errstr_unpriv = "bpf_array access is allowed only to CAP_PERFMON and CAP_SYS_ADMIN",
+ .result = ACCEPT,
+ .retval = 1,
+},
+{
+ "bpf_map_ptr: r = 0, map_ptr = map_ptr + r",
+ .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_MOV64_IMM(BPF_REG_0, 0),
+ BPF_LD_MAP_FD(BPF_REG_1, 0),
+ BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_0),
+ BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ },
+ .fixup_map_hash_16b = { 4 },
+ .result_unpriv = REJECT,
+ .errstr_unpriv = "R1 has pointer with unsupported alu operation",
+ .result = ACCEPT,
+},
+{
+ "bpf_map_ptr: r = 0, r = r + map_ptr",
+ .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_MOV64_IMM(BPF_REG_1, 0),
+ BPF_LD_MAP_FD(BPF_REG_0, 0),
+ BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_0),
+ BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ },
+ .fixup_map_hash_16b = { 4 },
+ .result_unpriv = REJECT,
+ .errstr_unpriv = "R0 has pointer with unsupported alu operation",
+ .result = ACCEPT,
+},