selftests/bpf: add get_next_key boundary test for cgroup_storage

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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 <paul.chaignon@gmail.com>
Signed-off-by: Weiming Shi <bestswngs@gmail.com>
Acked-by: Paul Chaignon <paul.chaignon@gmail.com>
Link: https://lore.kernel.org/r/20260403132951.43533-3-bestswngs@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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Weiming Shi 2026-04-03 21:29:51 +08:00 • committed by Alexei Starovoitov

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commit 262b857da6

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tools/testing/selftests/bpf/prog_tests/cgroup_storage.c

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