Re: [PATCH v11 07/12] seccomp: add SECCOMP_RET_ERRNO

[Oleg Nesterov]

On 02/24, Will Drewry wrote:
>
>  static u32 seccomp_run_filters(int syscall)
>  {
>  	struct seccomp_filter *f;
> -	u32 ret = SECCOMP_RET_KILL;
>  	static const struct bpf_load_fn fns = {
>  		bpf_load,
>  		sizeof(struct seccomp_data),
>  	};
> +	u32 ret = SECCOMP_RET_ALLOW;
>  	const void *sc_ptr = (const void *)(uintptr_t)syscall;
>  
> +	/* Ensure unexpected behavior doesn't result in failing open. */
> +	if (unlikely(current->seccomp.filter == NULL))
> +		ret = SECCOMP_RET_KILL;

Is "seccomp.filter == NULL" really possible?

Oleg.

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