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[192.26.29.3]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-47f85c52fa9sm27980524f8f.20.2026.07.24.13.16.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 24 Jul 2026 13:16:36 -0700 (PDT) From: Kumar Kartikeya Dwivedi To: bpf@vger.kernel.org Cc: Eduard Zingerman , Emil Tsalapatis , Alexei Starovoitov , Andrii Nakryiko , Daniel Borkmann , kkd@meta.com, kernel-team@meta.com Subject: [PATCH bpf-next v1 1/2] bpf: Allow bpf_res_spin_lock() in all contexts Date: Fri, 24 Jul 2026 22:16:31 +0200 Message-ID: <20260724201634.3025247-2-memxor@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260724201634.3025247-1-memxor@gmail.com> References: <20260724201634.3025247-1-memxor@gmail.com> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1270; i=memxor@gmail.com; h=from:subject; bh=KErE69bqCkkoWIL2Zx3CAGeXSr9TAo5G/eXibghr1wQ=; b=owGbwMvMwCXmrmtenRyi38x4Wi2JISv5eOySe13fI8omrwmeNqehZX3M0q/7bR7dXpR8hWvyr UmCKf9XdJSyMIhxMciKKbKU/N/HZHyi8neg7TJumDmsTCBDGLg4BeAiqxj++/kKzvEqeffdJnlb wGlPLu3Zr+10P61TTsySPTRVKHtnCiPDlMD0at4Tvj1J+iwdfnNP5DCKuxxfU9uT7PJ80tvLLxn YAQ== X-Developer-Key: i=memxor@gmail.com; a=openpgp; fpr=B34BD741DE8494B76E2F717880EF20021D46C59B Content-Transfer-Encoding: 8bit There is no particular reason to keep bpf_res_spin_lock() disabled in tracing programs, since it is safe against reentrancy and deadlocks. Remove the restriction for tracing programs covered by the predicate is_tracing_prog_type(). This is a prerequisite before the definition of is_tracing_prog_type() is updated to include raw_tp, fentry, fexit, and fmod_ret. Existing tracing programs will be updated to use bpf_res_spin_lock() instead when it is available. Acked-by: Eduard Zingerman Reviewed-by: Emil Tsalapatis Signed-off-by: Kumar Kartikeya Dwivedi --- kernel/bpf/verifier.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c index 52be0a118cce..57a76c21d624 100644 --- a/kernel/bpf/verifier.c +++ b/kernel/bpf/verifier.c @@ -17815,7 +17815,9 @@ static int check_map_prog_compatibility(struct bpf_verifier_env *env, verbose(env, "socket filter progs cannot use bpf_spin_lock yet\n"); return -EINVAL; } + } + if (btf_record_has_field(map->record, BPF_SPIN_LOCK)) { if (is_tracing_prog_type(prog_type)) { verbose(env, "tracing progs cannot use bpf_spin_lock yet\n"); return -EINVAL; -- 2.53.0