Re: [PATCH] Add LoadPin support for eBPF program loading

[David Windsor]

On Thu, Jun 11, 2026 at 01:59:10PM -0500, Alex Roberts wrote:
> +static int loadpin_bpf_prog_load(struct bpf_prog *prog, union bpf_attr *attr,
> +				  struct bpf_token *token, bool is_kernel)
> +{
> +	int res = 0;
> +	struct file *exe_file = NULL;
> +	struct mm_struct *mm = current->mm;
> +
> +	if (is_kernel || !mm)
> +		return 0;
> +
> +	exe_file = get_mm_exe_file(mm);
> +	if (!exe_file)
> +		return 0;
> +
> +	res = loadpin_check(exe_file, READING_EBPF);

Why are we checking current here? IIUC this will be whoever calls
bpf(2), which would be the loader, which would then be able to load bpf
programs from an untrusted source.

In the kmod case loadpin_check() sees the .ko itself.