linux-kernel - [PATCH RFC 17/17] bpf: Enable bcf for priv users

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Message-Id: <20251106125255.1969938-18-hao.sun@inf.ethz.ch>
Date: Thu,  6 Nov 2025 13:52:55 +0100
From: Hao Sun <sunhao.th@...il.com>
To: bpf@...r.kernel.org
Cc: ast@...nel.org,
	daniel@...earbox.net,
	andrii@...nel.org,
	eddyz87@...il.com,
	john.fastabend@...il.com,
	martin.lau@...ux.dev,
	song@...nel.org,
	yonghong.song@...ux.dev,
	linux-kernel@...r.kernel.org,
	sunhao.th@...il.com,
	Hao Sun <hao.sun@....ethz.ch>
Subject: [PATCH RFC 17/17] bpf: Enable bcf for priv users

Enable bcf when bcf_buf is provided and is_priv.

Signed-off-by: Hao Sun <hao.sun@....ethz.ch>
---
 kernel/bpf/verifier.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index fb672c9cc7cd..d48357bac9f3 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -25961,6 +25961,7 @@ int bpf_check(struct bpf_prog **prog, union bpf_attr *attr, bpfptr_t uattr, __u3
 	env->bypass_spec_v1 = bpf_bypass_spec_v1(env->prog->aux->token);
 	env->bypass_spec_v4 = bpf_bypass_spec_v4(env->prog->aux->token);
 	env->bpf_capable = is_priv = bpf_token_capable(env->prog->aux->token, CAP_BPF);
+	env->bcf.available = is_priv && attr->bcf_buf_size;
 
 	bpf_get_btf_vmlinux();
 
-- 
2.34.1