netdev - Re: [PATCH bpf-next v2 4/4] bpf: enable bpf_{g,s}etsockopt in BPF_CGROUP_UDP{4,6}

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Fri, 29 Jan 2021 01:52:46 +0100
From:   Daniel Borkmann <daniel@...earbox.net>
To:     Stanislav Fomichev <sdf@...gle.com>, netdev@...r.kernel.org,
        bpf@...r.kernel.org
Cc:     ast@...nel.org
Subject: Re: [PATCH bpf-next v2 4/4] bpf: enable bpf_{g,s}etsockopt in
 BPF_CGROUP_UDP{4,6}_RECVMSG

On 1/28/21 12:28 AM, Stanislav Fomichev wrote:
> Those hooks run as BPF_CGROUP_RUN_SA_PROG_LOCK and operate on
> a locked socket.
> 
> Signed-off-by: Stanislav Fomichev <sdf@...gle.com>
> ---
>   net/core/filter.c                                 | 4 ++++
>   tools/testing/selftests/bpf/progs/recvmsg4_prog.c | 5 +++++
>   tools/testing/selftests/bpf/progs/recvmsg6_prog.c | 5 +++++
>   3 files changed, 14 insertions(+)
> 
> diff --git a/net/core/filter.c b/net/core/filter.c
> index ba436b1d70c2..e15d4741719a 100644
> --- a/net/core/filter.c
> +++ b/net/core/filter.c
> @@ -7023,6 +7023,8 @@ sock_addr_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
>   		case BPF_CGROUP_INET6_BIND:
>   		case BPF_CGROUP_INET4_CONNECT:
>   		case BPF_CGROUP_INET6_CONNECT:
> +		case BPF_CGROUP_UDP4_RECVMSG:
> +		case BPF_CGROUP_UDP6_RECVMSG:
>   		case BPF_CGROUP_UDP4_SENDMSG:
>   		case BPF_CGROUP_UDP6_SENDMSG:
>   		case BPF_CGROUP_INET4_GETPEERNAME:
> @@ -7039,6 +7041,8 @@ sock_addr_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
>   		case BPF_CGROUP_INET6_BIND:
>   		case BPF_CGROUP_INET4_CONNECT:
>   		case BPF_CGROUP_INET6_CONNECT:
> +		case BPF_CGROUP_UDP4_RECVMSG:
> +		case BPF_CGROUP_UDP6_RECVMSG:
>   		case BPF_CGROUP_UDP4_SENDMSG:
>   		case BPF_CGROUP_UDP6_SENDMSG:
>   		case BPF_CGROUP_INET4_GETPEERNAME:

Looks good overall, also thanks for adding the test cases! I was about to apply, but noticed one
small nit that would be good to get resolved before that. Above you now list all the attach hooks
for sock_addr ctx, so we should just remove the whole switch that tests on prog->expected_attach_type
altogether in this last commit.

Thanks,
Daniel