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selftests/bpf: Use the correct destructor kfunc type

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With CONFIG_CFI enabled, the kernel strictly enforces that indirect
function calls use a function pointer type that matches the target
function. As bpf_testmod_ctx_release() signature differs from the
btf_dtor_kfunc_t pointer type used for the destructor calls in
bpf_obj_free_fields(), add a stub function with the correct type to
fix the type mismatch.

Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Acked-by: Yonghong Song <yonghong.song@linux.dev>
Link: https://lore.kernel.org/r/20260110082548.113748-9-samitolvanen@google.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Sami Tolvanen 2026-01-10 08:25:52 +00:00 committed by Alexei Starovoitov
parent c99d97b466
commit ba7f1024a1
1 changed files with 7 additions and 1 deletions
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8
tools/testing/selftests/bpf/test_kmods/bpf_testmod.c
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@ -285,6 +285,12 @@ __bpf_kfunc void bpf_testmod_ctx_release(struct bpf_testmod_ctx *ctx)
call_rcu(&ctx->rcu, testmod_free_cb);
}
__bpf_kfunc void bpf_testmod_ctx_release_dtor(void *ctx)
{
bpf_testmod_ctx_release(ctx);
}
CFI_NOSEAL(bpf_testmod_ctx_release_dtor);
static struct bpf_testmod_ops3 *st_ops3;
static int bpf_testmod_test_3(void)
@ -707,7 +713,7 @@ BTF_KFUNCS_END(bpf_testmod_common_kfunc_ids)
BTF_ID_LIST(bpf_testmod_dtor_ids)
BTF_ID(struct, bpf_testmod_ctx)
BTF_ID(func, bpf_testmod_ctx_release)
BTF_ID(func, bpf_testmod_ctx_release_dtor)
static const struct btf_kfunc_id_set bpf_testmod_common_kfunc_set = {
.owner = THIS_MODULE,