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Mon, 10 Aug 2026 11:35:55 -0700 (PDT) Received: from localhost ([2a03:2880:2ff:41::]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2d14dbea7e0sm39841335ad.53.2026.08.10.11.35.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 10 Aug 2026 11:35:55 -0700 (PDT) Date: Mon, 10 Aug 2026 11:35:33 -0700 From: Stanislav Fomichev To: Mahe Tardy Cc: bpf@vger.kernel.org, andrew+netdev@lunn.ch, andrii@kernel.org, ast@kernel.org, daniel@iogearbox.net, davem@davemloft.net, eddyz87@gmail.com, edumazet@google.com, john.fastabend@gmail.com, kuba@kernel.org, liamwisehart@meta.com, martin.lau@linux.dev, pabeni@redhat.com, song@kernel.org, netdev@vger.kernel.org, ameryhung@gmail.com, kuniyu@google.com, memxor@gmail.com, jiayuan.chen@linux.dev Subject: Re: [PATCH bpf-next v5 4/5] selftests/bpf: Test forbidden bpf_ksock_send() LSM attach Message-ID: References: <20260807171532.125149-1-mahe.tardy@gmail.com> <20260807171532.125149-5-mahe.tardy@gmail.com> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20260807171532.125149-5-mahe.tardy@gmail.com> On 08/07, Mahe Tardy wrote: > The bpf_ksock_send() kfunc eventually calls security_socket_sendmsg(), > thus creating a possible recursion if a program calling the kfunc is > attached on that specific hook. A filter is added on the kfunc > registration to prevent that at load time from the verifier. This test > exercises that the verifier will reject such program on that attach > point. > > Signed-off-by: Mahe Tardy Acked-by: Stanislav Fomichev