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Fri, 03 Apr 2026 06:30:54 -0700 (PDT) From: Weiming Shi To: Martin KaFai Lau , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Eduard Zingerman , Kumar Kartikeya Dwivedi Cc: Song Liu , Yonghong Song , Jiri Olsa , Roman Gushchin , bpf@vger.kernel.org, Xiang Mei , Weiming Shi , Paul Chaignon Subject: [PATCH bpf v2 2/2] selftests/bpf: add get_next_key boundary test for cgroup_storage Date: Fri, 3 Apr 2026 21:29:51 +0800 Message-ID: <20260403132951.43533-3-bestswngs@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260403132951.43533-1-bestswngs@gmail.com> References: <20260403132951.43533-1-bestswngs@gmail.com> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Verify that bpf_map__get_next_key() correctly returns -ENOENT when called on the last (and only) key in a cgroup_storage map. Before the fix in the previous patch, this would succeed with bogus key data instead of failing. Suggested-by: Paul Chaignon Signed-off-by: Weiming Shi --- tools/testing/selftests/bpf/prog_tests/cgroup_storage.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/tools/testing/selftests/bpf/prog_tests/cgroup_storage.c b/tools/testing/selftests/bpf/prog_tests/cgroup_storage.c index cf395715ced47..5451a43b3563e 100644 --- a/tools/testing/selftests/bpf/prog_tests/cgroup_storage.c +++ b/tools/testing/selftests/bpf/prog_tests/cgroup_storage.c @@ -86,6 +86,11 @@ void test_cgroup_storage(void) err = SYS_NOFAIL(PING_CMD); ASSERT_OK(err, "sixth ping"); + err = bpf_map__get_next_key(skel->maps.cgroup_storage, &key, &key, + sizeof(key)); + ASSERT_ERR(err, "bpf_map__get_next_key should fail"); + ASSERT_EQ(errno, ENOENT, "no second key"); + cleanup_progs: cgroup_storage__destroy(skel); cleanup_network: -- 2.43.0