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charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Authenticated-Sender: daniel@iogearbox.net X-Virus-Scanned: Clear (ClamAV 0.103.10/27437/Thu Oct 24 10:33:37 2024) Hi Byeonguk, On 10/24/24 11:08 AM, Byeonguk Jeong wrote: > Add a test for out-of-bounds write in trie_get_next_key() when a full > path from root to leaf exists and bpf_map_get_next_key() is called > with the leaf node. It may crashes the kernel on failure, so please > run in a VM. > > Signed-off-by: Byeonguk Jeong Could you submit the fix + this selftest as a 2-patch series, otherwise BPF CI cannot test both in combination (pls make sure subject has [PATCH bpf] so that our CI adds this on top of the bpf tree). Right now the CI selftest build threw an error: /tmp/work/bpf/bpf/tools/testing/selftests/bpf/map_tests/lpm_trie_map_get_next_key.c: In function ‘test_lpm_trie_map_get_next_key’: /tmp/work/bpf/bpf/tools/testing/selftests/bpf/map_tests/lpm_trie_map_get_next_key.c:84:9: error: format not a string literal and no format arguments [-Werror=format-security] 84 | CHECK(map_fd == -1, "bpf_map_create(), error:%s\n", | ^~~~~ TEST-OBJ [test_maps] task_storage_map.test.o TEST-OBJ [test_progs] access_variable_array.test.o cc1: all warnings being treated as errors TEST-OBJ [test_progs] align.test.o TEST-OBJ [test_progs] arena_atomics.test.o make: *** [Makefile:765: /tmp/work/bpf/bpf/tools/testing/selftests/bpf/lpm_trie_map_get_next_key.test.o] Error 1 make: *** Waiting for unfinished jobs.... GEN-SKEL [test_progs-no_alu32] test_usdt.skel.h make: Leaving directory '/tmp/work/bpf/bpf/tools/testing/selftests/bpf' Also on quick glance, please use ASSERT_*() macros instead of CHECK() as the latter is deprecated. Thanks, Daniel