Add a test to ensure we do mark_chain_precision for the argument type
ARG_CONST_ALLOC_SIZE_OR_ZERO. For other argument types, this was already
done, but propagation for missing for this case. Without the fix, this
test case loads successfully.
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@xxxxxxxxx>
---
.../testing/selftests/bpf/verifier/precise.c | 25 +++++++++++++++++++
1 file changed, 25 insertions(+)
diff --git a/tools/testing/selftests/bpf/verifier/precise.c b/tools/testing/selftests/bpf/verifier/precise.c
index 9e754423fa8b..6c03a7d805f9 100644
--- a/tools/testing/selftests/bpf/verifier/precise.c
+++ b/tools/testing/selftests/bpf/verifier/precise.c
@@ -192,3 +192,28 @@
.result = VERBOSE_ACCEPT,
.retval = -1,
},
+{
+ "precise: mark_chain_precision for ARG_CONST_ALLOC_SIZE_OR_ZERO",
+ .insns = {
+ BPF_LDX_MEM(BPF_W, BPF_REG_4, BPF_REG_1, offsetof(struct xdp_md, ingress_ifindex)),
+ BPF_LD_MAP_FD(BPF_REG_6, 0),
+ BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
+ BPF_MOV64_IMM(BPF_REG_2, 1),
+ BPF_MOV64_IMM(BPF_REG_3, 0),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_4, 0, 1),
+ BPF_MOV64_IMM(BPF_REG_2, 0x1000),
+ BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_ringbuf_reserve),
+ BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1),
+ BPF_EXIT_INSN(),
+ BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
+ BPF_LDX_MEM(BPF_DW, BPF_REG_2, BPF_REG_0, 42),
+ BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_ringbuf_submit),
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ },
+ .fixup_map_ringbuf = { 1 },
+ .prog_type = BPF_PROG_TYPE_XDP,
+ .flags = BPF_F_TEST_STATE_FREQ,
+ .errstr = "invalid access to memory, mem_size=1 off=42 size=8",
+ .result = REJECT,
+},
--
2.34.1
