linux-kernel - Re: [PATCH v4 8/9] bpf: use new capable

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Date:   Tue, 16 May 2023 11:42:47 -0700
From:   Andrii Nakryiko <andrii.nakryiko@...il.com>
To:     Christian Göttsche <cgzones@...glemail.com>
Cc:     selinux@...r.kernel.org, Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        John Fastabend <john.fastabend@...il.com>,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <martin.lau@...ux.dev>,
        Song Liu <song@...nel.org>, Yonghong Song <yhs@...com>,
        KP Singh <kpsingh@...nel.org>,
        Stanislav Fomichev <sdf@...gle.com>,
        Hao Luo <haoluo@...gle.com>, Jiri Olsa <jolsa@...nel.org>,
        bpf@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 8/9] bpf: use new capable_any functionality

On Thu, May 11, 2023 at 7:26 AM Christian Göttsche
<cgzones@...glemail.com> wrote:
>
> Use the new added capable_any function in appropriate cases, where a
> task is required to have any of two capabilities.
>
> Signed-off-by: Christian Göttsche <cgzones@...glemail.com>
> ---
> v3:
>    rename to capable_any()
> ---
>  kernel/bpf/syscall.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>

Acked-by: Andrii Nakryiko <andrii@...nel.org>


> diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
> index 14f39c1e573e..1bd50da05a22 100644
> --- a/kernel/bpf/syscall.c
> +++ b/kernel/bpf/syscall.c
> @@ -2539,7 +2539,7 @@ static int bpf_prog_load(union bpf_attr *attr, bpfptr_t uattr, u32 uattr_size)
>             !bpf_capable())
>                 return -EPERM;
>
> -       if (is_net_admin_prog_type(type) && !capable(CAP_NET_ADMIN) && !capable(CAP_SYS_ADMIN))
> +       if (is_net_admin_prog_type(type) && !capable_any(CAP_NET_ADMIN, CAP_SYS_ADMIN))
>                 return -EPERM;
>         if (is_perfmon_prog_type(type) && !perfmon_capable())
>                 return -EPERM;
> --
> 2.40.1
>