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Diffstat (limited to 'tools/testing/selftests/bpf/verifier/leak_ptr.c')
-rw-r--r--tools/testing/selftests/bpf/verifier/leak_ptr.c67
1 files changed, 67 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/verifier/leak_ptr.c b/tools/testing/selftests/bpf/verifier/leak_ptr.c
new file mode 100644
index 000000000000..d6eec17f2cd2
--- /dev/null
+++ b/tools/testing/selftests/bpf/verifier/leak_ptr.c
@@ -0,0 +1,67 @@
+{
+ "leak pointer into ctx 1",
+ .insns = {
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[0])),
+ BPF_LD_MAP_FD(BPF_REG_2, 0),
+ BPF_STX_XADD(BPF_DW, BPF_REG_1, BPF_REG_2,
+ offsetof(struct __sk_buff, cb[0])),
+ BPF_EXIT_INSN(),
+ },
+ .fixup_map_hash_8b = { 2 },
+ .errstr_unpriv = "R2 leaks addr into mem",
+ .result_unpriv = REJECT,
+ .result = REJECT,
+ .errstr = "BPF_XADD stores into R1 ctx is not allowed",
+},
+{
+ "leak pointer into ctx 2",
+ .insns = {
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[0])),
+ BPF_STX_XADD(BPF_DW, BPF_REG_1, BPF_REG_10,
+ offsetof(struct __sk_buff, cb[0])),
+ BPF_EXIT_INSN(),
+ },
+ .errstr_unpriv = "R10 leaks addr into mem",
+ .result_unpriv = REJECT,
+ .result = REJECT,
+ .errstr = "BPF_XADD stores into R1 ctx is not allowed",
+},
+{
+ "leak pointer into ctx 3",
+ .insns = {
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_LD_MAP_FD(BPF_REG_2, 0),
+ BPF_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_2,
+ offsetof(struct __sk_buff, cb[0])),
+ BPF_EXIT_INSN(),
+ },
+ .fixup_map_hash_8b = { 1 },
+ .errstr_unpriv = "R2 leaks addr into ctx",
+ .result_unpriv = REJECT,
+ .result = ACCEPT,
+},
+{
+ "leak pointer into map val",
+ .insns = {
+ BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
+ 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_JEQ, BPF_REG_0, 0, 3),
+ BPF_MOV64_IMM(BPF_REG_3, 0),
+ BPF_STX_MEM(BPF_DW, BPF_REG_0, BPF_REG_3, 0),
+ BPF_STX_XADD(BPF_DW, BPF_REG_0, BPF_REG_6, 0),
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ },
+ .fixup_map_hash_8b = { 4 },
+ .errstr_unpriv = "R6 leaks addr into mem",
+ .result_unpriv = REJECT,
+ .result = ACCEPT,
+},