kernel/tools/testing/selftests/bpf/verifier/map_kptr.c, branch linux-6.2.yHosts the 0x221E linux distro kernel.https://universe.0xinfinity.dev/distro/kernel/atom?h=linux-6.2.y2022-05-11T23:57:27Zbpf: Prepare prog_test_struct kfuncs for runtime tests2022-05-11T23:57:27ZKumar Kartikeya Dwivedimemxor@gmail.com2022-05-11T19:46:52Zurn:sha1:5cdccadcac2612f947ebc26ad7023dfb7e8871f9
In an effort to actually test the refcounting logic at runtime, add a
refcount_t member to prog_test_ref_kfunc and use it in selftests to
verify and test the whole logic more exhaustively.
The kfunc calls for prog_test_member do not require runtime refcounting,
as they are only used for verifier selftests, not during runtime
execution. Hence, their implementation now has a WARN_ON_ONCE as it is
not meant to be reachable code at runtime. It is strictly used in tests
triggering failure cases in the verifier. bpf_kfunc_call_memb_release is
called from map free path, since prog_test_member is embedded in map
value for some verifier tests, so we skip WARN_ON_ONCE for it.
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Link: https://lore.kernel.org/r/20220511194654.765705-3-memxor@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
selftests/bpf: Add verifier tests for kptr2022-04-26T03:26:44ZKumar Kartikeya Dwivedimemxor@gmail.com2022-04-24T21:49:00Zurn:sha1:05a945deefaa9fe6d34f06f0ab0cbfc72e2dbfa0
Reuse bpf_prog_test functions to test the support for PTR_TO_BTF_ID in
BPF map case, including some tests that verify implementation sanity and
corner cases.
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20220424214901.2743946-13-memxor@gmail.com