From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E4F1EC433EF for ; Mon, 22 Nov 2021 23:57:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230337AbhKWAAr (ORCPT ); Mon, 22 Nov 2021 19:00:47 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34834 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229672AbhKWAAq (ORCPT ); Mon, 22 Nov 2021 19:00:46 -0500 Received: from mail-pg1-x543.google.com (mail-pg1-x543.google.com [IPv6:2607:f8b0:4864:20::543]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D2671C061574 for ; Mon, 22 Nov 2021 15:57:39 -0800 (PST) Received: by mail-pg1-x543.google.com with SMTP id t4so9332236pgn.9 for ; Mon, 22 Nov 2021 15:57:39 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=+SyNmxjVrM1MiYtCpCqUDLH2S8AYiRFIZmRV4VCFzmM=; b=b9Fj4jNy1TgambKUu6d35RAOA/J9bYKpgs5+cZV86qRhfZmIXgSRHhoLWrCZM7uAN0 UhYxylOqlNz2tBtulmB51f0gNYQAzZ5ZwHuzcxAqAArlXBhyBodzmSGttPDyxCUR1tqt Pflmx5a+9W8i0dtkTBirTJEdy5Fy6vi75EPqJMECgv4Jnj1ggmOeVF0bYTAfMI0v1563 W4awPGoLEwmr+elyCm9X40iFlyvx58GW90GfkIblO/J70iWmIw0sVOuIjmwbNi9A+lVq UvWP9hr3didtpx8Lm9VwZwKdFQ917VZ2HiWL9zBgsoU12U33fQ6m6vDVsAoNvcqQNjuQ I07A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=+SyNmxjVrM1MiYtCpCqUDLH2S8AYiRFIZmRV4VCFzmM=; b=pWKc8HRkBYI3MgsZ1oFXyjUt27kM3S1cUk2TUuyw85xXRgIVZUiL27m6PLWpyUT4ex Wv+S7butlFvUZ7JDIxeU08I4bWiIl/Q42uZrgWbsIx5YXRj9NLzZPW+x2EsVnVWaMUWY +ISrho6LTaUnfKqd4p3ARIVdc6R+BfMG+VYzKQoNia4HFCfAe2wRpBRXCFjdj1odzqDZ djJEtXsr6r13GkRDmjNbb9CmaEvLY8VwZUxkOIVvTAuVWE1vJAE5w9EpXTOXaFsfNY07 oH6w4tdM/Sa9Yw/KJ5E/SLp9BSlWE0SKxflzRKskndcYQ7fi/r12617njegLE0gytebD qu7w== X-Gm-Message-State: AOAM530Gs3bWaB/0P+K8NRlDTnVvEBj+Uug8ezxFQ+xy4jE1sPUJCgd7 J7crJ4NwUtjqrfL6z/mWv7ZG8J4ke/g= X-Google-Smtp-Source: ABdhPJwiaxb8lwylQEWFuHIBzSfcL7+hS3Xd8ylfqJ4o+6ThkOStqv15lxbr0KbJtx6nVaRdkTMqww== X-Received: by 2002:a05:6a00:2313:b0:49f:d9ec:7492 with SMTP id h19-20020a056a00231300b0049fd9ec7492mr885762pfh.25.1637625459261; Mon, 22 Nov 2021 15:57:39 -0800 (PST) Received: from localhost ([2405:201:6014:d064:3d4e:6265:800c:dc84]) by smtp.gmail.com with ESMTPSA id e15sm9371192pfc.134.2021.11.22.15.57.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 22 Nov 2021 15:57:38 -0800 (PST) From: Kumar Kartikeya Dwivedi To: bpf@vger.kernel.org Cc: Andrii Nakryiko , Alexei Starovoitov , Daniel Borkmann Subject: [PATCH bpf-next v1 1/3] bpf: Change bpf_kallsyms_lookup_name size type to ARG_CONST_SIZE_OR_ZERO Date: Tue, 23 Nov 2021 05:27:31 +0530 Message-Id: <20211122235733.634914-2-memxor@gmail.com> X-Mailer: git-send-email 2.34.0 In-Reply-To: <20211122235733.634914-1-memxor@gmail.com> References: <20211122235733.634914-1-memxor@gmail.com> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=976; h=from:subject; bh=AtZbQtOOJ2Z4rJPkyXSn1Ll6XcEhA3xESndwsMgvAwc=; b=owEBbQKS/ZANAwAIAUzgyIZIvxHKAcsmYgBhnC22bMCppp/GTM6BFAvf9b4QOwlM922fs0WXvGUh vrrTR/qJAjMEAAEIAB0WIQRLvip+Buz51YI8YRFM4MiGSL8RygUCYZwttgAKCRBM4MiGSL8RymQLEA CSRLst9ofsy1MJCUUtBrJh9uN+Yx3e/uC5Q3Y2Vw0eCHPLe1z4ZteB1aie3pbIOweTZVehddJ8EpKT 1FtNwN6sZGsVkKdu8z63tfPgHyXraDQxc6K42iIXCUwR8qS/m8/CWmcu+vejDkeej0grkeeTw6SAmO gjmnGd5KmIDDeDU2d03RxXwr+lVg8jiWM5o3RqfjjptVV68Qxei1bDFbLeX1y+nQPOCLfzmrbvel5V oGbWty8FhD4Z4qPSsq3GYS6iqAIqXBvm0RcDZDDqkqZiaMYl4hIwh2HyBHtgMPWxZMeDWaX2F6z3Sb wVPe4bRGt6Tv7wy+KrcyxP5yY1wfCl5VNU8QK/OuuAHr3OeVL87MGUccTXyHLWzS2Xa5Vy+YmNYaYg 01xpu4frmKWYs9r727W75EGCdblOk0UrMjpt1A0yG9URJCCmveUT6rQQ7C871t7cTpFWpE87t/xigG NrHfcEe/ho65BPGz73tYesaZHqZPjnP3lApnN26E51dcblLW+JzUme2kv0vMyMCqf1biA0p3VHncVQ RQ0h/i0p2D7vFEA30Ak6DW4TMbSzl3Qa3NYYo57VE9iKHKszuFtvschDRQPIxEvkIJO0ajNDdWWVii OiVstm8rzbPqqWRMVtQUnL3Mnhhordxu89OXhaR0TlPPHuaE2HT+A/b2usnQ== X-Developer-Key: i=memxor@gmail.com; a=openpgp; fpr=4BBE2A7E06ECF9D5823C61114CE0C88648BF11CA Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org Andrii mentioned in [0] that switching to ARG_CONST_SIZE_OR_ZERO lets user avoid having to prove that string size at runtime is not zero and helps with not having to supress clang optimizations. [0]: https://lore.kernel.org/bpf/CAEf4BzZa_vhXB3c8atNcTS6=krQvC25H7K7c3WWZhM=27ro=Wg@mail.gmail.com Suggested-by: Andrii Nakryiko Signed-off-by: Kumar Kartikeya Dwivedi --- kernel/bpf/syscall.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c index 50f96ea4452a..47089d1d67a4 100644 --- a/kernel/bpf/syscall.c +++ b/kernel/bpf/syscall.c @@ -4804,7 +4804,7 @@ const struct bpf_func_proto bpf_kallsyms_lookup_name_proto = { .gpl_only = false, .ret_type = RET_INTEGER, .arg1_type = ARG_PTR_TO_MEM, - .arg2_type = ARG_CONST_SIZE, + .arg2_type = ARG_CONST_SIZE_OR_ZERO, .arg3_type = ARG_ANYTHING, .arg4_type = ARG_PTR_TO_LONG, }; -- 2.34.0