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| author | Matt Bobrowski <mattbobrowski@google.com> | 2026-01-20 09:16:30 +0000 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2026-01-20 17:11:24 -0800 |
| commit | dd341eacdba360d035c9d4de66d3c80a89d77c84 (patch) | |
| tree | 0e3017d911a3cc966443906ad1686aa6de1caef9 /tools/testing/selftests/bpf/test_kmods | |
| parent | 2516a9c5a5545c061cef6c19bdedebb7c2ee43a2 (diff) | |
| download | linux-next-dd341eacdba360d035c9d4de66d3c80a89d77c84.tar.gz linux-next-dd341eacdba360d035c9d4de66d3c80a89d77c84.zip | |
selftests/bpf: update verifier test for default trusted pointer semantics
Replace the verifier test for default trusted pointer semantics, which
previously relied on BPF kfunc bpf_get_root_mem_cgroup(), with a new
test utilizing dedicated BPF kfuncs defined within the bpf_testmod.
bpf_get_root_mem_cgroup() was modified such that it again relies on
KF_ACQUIRE semantics, therefore no longer making it a suitable
candidate to test BPF verifier default trusted pointer semantics
against.
Link: https://lore.kernel.org/bpf/20260113083949.2502978-2-mattbobrowski@google.com
Signed-off-by: Matt Bobrowski <mattbobrowski@google.com>
Link: https://lore.kernel.org/r/20260120091630.3420452-1-mattbobrowski@google.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'tools/testing/selftests/bpf/test_kmods')
| -rw-r--r-- | tools/testing/selftests/bpf/test_kmods/bpf_testmod.c | 18 | ||||
| -rw-r--r-- | tools/testing/selftests/bpf/test_kmods/bpf_testmod_kfunc.h | 3 |
2 files changed, 21 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/test_kmods/bpf_testmod.c b/tools/testing/selftests/bpf/test_kmods/bpf_testmod.c index 0d542ba64365..d425034b72d3 100644 --- a/tools/testing/selftests/bpf/test_kmods/bpf_testmod.c +++ b/tools/testing/selftests/bpf/test_kmods/bpf_testmod.c @@ -254,6 +254,22 @@ __bpf_kfunc int *bpf_kfunc_ret_rcu_test_nostruct(int rdonly_buf_size) return NULL; } +static struct prog_test_member trusted_ptr; + +__bpf_kfunc struct prog_test_member *bpf_kfunc_get_default_trusted_ptr_test(void) +{ + return &trusted_ptr; +} + +__bpf_kfunc void bpf_kfunc_put_default_trusted_ptr_test(struct prog_test_member *trusted_ptr) +{ + /* + * This BPF kfunc doesn't actually have any put/KF_ACQUIRE + * semantics. We're simply wanting to simulate a BPF kfunc that takes a + * struct prog_test_member pointer as an argument. + */ +} + __bpf_kfunc struct bpf_testmod_ctx * bpf_testmod_ctx_create(int *err) { @@ -709,6 +725,8 @@ BTF_ID_FLAGS(func, bpf_testmod_ctx_create, KF_ACQUIRE | KF_RET_NULL) BTF_ID_FLAGS(func, bpf_testmod_ctx_release, KF_RELEASE) BTF_ID_FLAGS(func, bpf_testmod_ops3_call_test_1) BTF_ID_FLAGS(func, bpf_testmod_ops3_call_test_2) +BTF_ID_FLAGS(func, bpf_kfunc_get_default_trusted_ptr_test); +BTF_ID_FLAGS(func, bpf_kfunc_put_default_trusted_ptr_test); BTF_KFUNCS_END(bpf_testmod_common_kfunc_ids) BTF_ID_LIST(bpf_testmod_dtor_ids) diff --git a/tools/testing/selftests/bpf/test_kmods/bpf_testmod_kfunc.h b/tools/testing/selftests/bpf/test_kmods/bpf_testmod_kfunc.h index 225ea30c4e3d..10f89f06245f 100644 --- a/tools/testing/selftests/bpf/test_kmods/bpf_testmod_kfunc.h +++ b/tools/testing/selftests/bpf/test_kmods/bpf_testmod_kfunc.h @@ -166,4 +166,7 @@ extern int bpf_kfunc_multi_st_ops_test_1(struct st_ops_args *args, u32 id) __wea extern int bpf_kfunc_multi_st_ops_test_1_assoc(struct st_ops_args *args) __weak __ksym; #endif +struct prog_test_member *bpf_kfunc_get_default_trusted_ptr_test(void) __ksym; +void bpf_kfunc_put_default_trusted_ptr_test(struct prog_test_member *trusted_ptr) __ksym; + #endif /* _BPF_TESTMOD_KFUNC_H */ |