From 9f2afb635cffd670e71580a3070b6e5c68fb99c5 Mon Sep 17 00:00:00 2001 From: Kumar Kartikeya Dwivedi Date: Sun, 19 Jul 2026 17:36:31 +0200 Subject: [PATCH] selftests/bpf: Test duplicate unique fields in nested structs Add a raw BTF test with a spin lock directly in a struct and another in a nested struct. The duplicate must now be rejected during BTF loading. Signed-off-by: Kumar Kartikeya Dwivedi Link: https://patch.msgid.link/20260719153634.2908692-5-memxor@gmail.com Signed-off-by: Eduard Zingerman --- tools/testing/selftests/bpf/prog_tests/btf.c | 27 ++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/tools/testing/selftests/bpf/prog_tests/btf.c b/tools/testing/selftests/bpf/prog_tests/btf.c index 66855cbd6b73..2100400d896b 100644 --- a/tools/testing/selftests/bpf/prog_tests/btf.c +++ b/tools/testing/selftests/bpf/prog_tests/btf.c @@ -4250,6 +4250,33 @@ static struct btf_raw_test raw_tests[] = { .max_entries = 1, }, +/* + * struct inner { + * struct bpf_spin_lock lock; + * }; + * + * struct value { + * struct bpf_spin_lock lock; + * struct inner nested; + * }; + */ +{ + .descr = "struct test duplicate nested unique fields", + .raw_types = { + BTF_TYPE_INT_ENC(NAME_TBD, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_STRUCT_ENC(NAME_TBD, 1, 4), /* [2] */ + BTF_MEMBER_ENC(NAME_TBD, 1, 0), + BTF_STRUCT_ENC(NAME_TBD, 1, 4), /* [3] */ + BTF_MEMBER_ENC(NAME_TBD, 2, 0), + BTF_STRUCT_ENC(NAME_TBD, 2, 8), /* [4] */ + BTF_MEMBER_ENC(NAME_TBD, 2, 0), + BTF_MEMBER_ENC(NAME_TBD, 3, 32), + BTF_END_RAW, + }, + BTF_STR_SEC("\0int\0bpf_spin_lock\0val\0inner\0lock\0value\0lock\0nested"), + .btf_load_err = true, +}, + { .descr = "struct test repeated fields count overflow", .raw_types = {