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[192.26.29.3]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4954a2edda2sm197510335e9.13.2026.07.19.08.36.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 19 Jul 2026 08:36:39 -0700 (PDT) From: Kumar Kartikeya Dwivedi To: bpf@vger.kernel.org Cc: Alexei Starovoitov , Andrii Nakryiko , Daniel Borkmann , Eduard Zingerman , Emil Tsalapatis , kkd@meta.com, kernel-team@meta.com Subject: [PATCH bpf-next v2 5/5] selftests/bpf: Test duplicate bpf_refcount fields Date: Sun, 19 Jul 2026 17:36:32 +0200 Message-ID: <20260719153634.2908692-6-memxor@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260719153634.2908692-1-memxor@gmail.com> References: <20260719153634.2908692-1-memxor@gmail.com> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1366; i=memxor@gmail.com; h=from:subject; bh=2oa5USaUdYnShJ/OC6sAxGb9UX1weNTEblTOqF+//Po=; b=owGbwMvMwCXmrmtenRyi38x4Wi2JISvmlUTyDy3zKH+zP6f2hpw48zny0Wy7i/EaDGr/EjJsb 5892BjdUcrCIMbFICumyFLyfx+T8YnK34G2y7hh5rAygQxh4OIUgIn8u8bwvy704/ObDPaBnzsK 7zZ1x/4w6RbkFDk+nU3VRC6HraDpHsP/aI/m97+6XkQc+vXN0Us2fqnXzKs+Uz3ZAi743xI7qJv ABQA= X-Developer-Key: i=memxor@gmail.com; a=openpgp; fpr=B34BD741DE8494B76E2F717880EF20021D46C59B Content-Transfer-Encoding: 8bit Add a raw BTF test with two bpf_refcount fields. The duplicate must be rejected during BTF loading instead of reaching the duplicate-field invariant in btf_parse_fields(). Signed-off-by: Kumar Kartikeya Dwivedi --- tools/testing/selftests/bpf/prog_tests/btf.c | 21 ++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/tools/testing/selftests/bpf/prog_tests/btf.c b/tools/testing/selftests/bpf/prog_tests/btf.c index 2100400d896b..67b9015cbd98 100644 --- a/tools/testing/selftests/bpf/prog_tests/btf.c +++ b/tools/testing/selftests/bpf/prog_tests/btf.c @@ -4277,6 +4277,27 @@ static struct btf_raw_test raw_tests[] = { .btf_load_err = true, }, +/* + * struct value { + * struct bpf_refcount a; + * struct bpf_refcount b; + * }; + */ +{ + .descr = "struct test duplicate bpf_refcount 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, 2, 8), /* [3] */ + BTF_MEMBER_ENC(NAME_TBD, 2, 0), + BTF_MEMBER_ENC(NAME_TBD, 2, 32), + BTF_END_RAW, + }, + BTF_STR_SEC("\0int\0bpf_refcount\0refs\0value\0a\0b"), + .btf_load_err = true, +}, + { .descr = "struct test repeated fields count overflow", .raw_types = { -- 2.53.0