Re: [PATCH bpf-next v3 1/4] bpf: crypto: Use the correct destructor kfunc type

[Yonghong Song]

On 7/28/25 1:26 PM, Sami Tolvanen wrote:
> With CONFIG_CFI_CLANG enabled, the kernel strictly enforces that
> indirect function calls use a function pointer type that matches the
> target function. I ran into the following type mismatch when running
> BPF self-tests:
>
>    CFI failure at bpf_obj_free_fields+0x190/0x238 (target:
>      bpf_crypto_ctx_release+0x0/0x94; expected type: 0xa488ebfc)
>    Internal error: Oops - CFI: 00000000f2008228 [#1]  SMP
>    ...
>
> As bpf_crypto_ctx_release() is also used in BPF programs and using
> a void pointer as the argument would make the verifier unhappy, add
> a simple stub function with the correct type and register it as the
> destructor kfunc instead.
>
> Signed-off-by: Sami Tolvanen <samitolvanen@xxxxxxxxxx>

Acked-by: Yonghong Song <yonghong.song@xxxxxxxxx>