1 files changed, 62 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 000000000000..b52209db8250
--- /dev/null
+++ b/tools/testing/selftests/bpf/verifier/map_ptr.c
@@ -0,0 +1,62 @@
+{
+	"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",
+},
+{
+	"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,
+},