netdev - [PATCH bpf 0/3] bpf: Add BPF_PROG_TYPE_CGROUP_SKB attach type enforcement in BPF_LINK

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Message-ID: <20240426231621.2716876-1-sdf@google.com>
Date: Fri, 26 Apr 2024 16:16:17 -0700
From: Stanislav Fomichev <sdf@...gle.com>
To: bpf@...r.kernel.org, netdev@...r.kernel.org
Cc: ast@...nel.org, daniel@...earbox.net, andrii@...nel.org, 
	martin.lau@...ux.dev, song@...nel.org, yhs@...com, john.fastabend@...il.com, 
	kpsingh@...nel.org, sdf@...gle.com, haoluo@...gle.com, jolsa@...nel.org
Subject: [PATCH bpf 0/3] bpf: Add BPF_PROG_TYPE_CGROUP_SKB attach type
 enforcement in BPF_LINK_CREATE

Syzkaller found a case where it's possible to attach cgroup_skb program
to the sockopt hooks. Apparently it's currently possible to do that,
but only when using BPF_LINK_CREATE API. The first patch in the series
has more info on why that happens.

Stanislav Fomichev (3):
  bpf: Add BPF_PROG_TYPE_CGROUP_SKB attach type enforcement in
    BPF_LINK_CREATE
  selftests/bpf: Extend sockopt tests to use BPF_LINK_CREATE
  selftests/bpf: Add sockopt case to verify prog_type

 kernel/bpf/syscall.c                          |  5 ++
 .../selftests/bpf/prog_tests/sockopt.c        | 65 ++++++++++++++++---
 2 files changed, 62 insertions(+), 8 deletions(-)

-- 
2.44.0.769.g3c40516874-goog