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 EE898C4332F for ; Fri, 11 Nov 2022 14:34:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234578AbiKKOd6 (ORCPT ); Fri, 11 Nov 2022 09:33:58 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45468 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234606AbiKKOdy (ORCPT ); Fri, 11 Nov 2022 09:33:54 -0500 Received: from sin.source.kernel.org (sin.source.kernel.org [IPv6:2604:1380:40e1:4800::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1B7014AF0D for ; Fri, 11 Nov 2022 06:33:51 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sin.source.kernel.org (Postfix) with ESMTPS id D14F5CE254D for ; Fri, 11 Nov 2022 14:33:48 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0B248C433C1; Fri, 11 Nov 2022 14:33:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1668177226; bh=/ypLMjrNZsotjNwidPZtqfazLm1h17jgTEWxHLkMVUk=; h=From:To:Cc:Subject:Date:From; b=jsiB7yd50OHtzygDRjWop4Q2Q/RGO8ZU7bLLRITN1ORJ928mGXuGWzaZauOZUqAXe tuP83aikwF8ILmB+2tuswKaYKPF8JQ7DPZK/kN17w90AWRuAKRV7KV94kzsKzO9kn4 20x6+e1qNrs5zN7JBclnNyF6FaNNF4+qW3Ad4Ra0fH4yltpCE54/mgMdaXKUc5M9G7 su6+pC+9l69NLvYRIVEf9Z0cHv/cA46xYDUoXjzHnu8MAV++1MpEhkj8S41pFkp5GV Yk6NeZLoOv1DC1I3etW8JnRdsiDrJ1HFJuXsxkdnnCPFGtCuinMfbbuUowoHppF8t7 jGSs0C/d4LX/Q== From: Jiri Olsa To: Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko Cc: bpf@vger.kernel.org, Martin KaFai Lau , Song Liu , Yonghong Song , John Fastabend , KP Singh , Stanislav Fomichev , Hao Luo Subject: [PATCHv2 bpf-next 0/2] bpf: Add bpf_vma_build_id_parse kfunc Date: Fri, 11 Nov 2022 15:33:39 +0100 Message-Id: <20221111143341.508022-1-jolsa@kernel.org> X-Mailer: git-send-email 2.38.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org hi, first version of this patchset added helper for this functionality, but based Alexei's feedback [1], changing it to kfunc. With the current build_id_parse function as kfunc we can't effectively check buffer size provided by user. Therefore adding new function as bpf kfunc: int bpf_vma_build_id_parse(struct vm_area_struct *vma, unsigned char *build_id, size_t build_id__sz); that triggers kfunc's verifier check for build_id/build_id__sz buffer size and calls build_id_parse. thanks, jirka [1] https://lore.kernel.org/bpf/CAADnVQKyT4Mm4EdTCYK8c070E-BwPZS_FOkWKLJC80riSGmLTg@mail.gmail.com/ --- Jiri Olsa (2): bpf: Add bpf_vma_build_id_parse function and kfunc selftests/bpf: Add bpf_vma_build_id_parse kfunc test include/linux/bpf.h | 5 +++++ kernel/bpf/helpers.c | 16 ++++++++++++++++ tools/testing/selftests/bpf/prog_tests/bpf_vma_build_id_parse.c | 88 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ tools/testing/selftests/bpf/progs/bpf_vma_build_id_parse.c | 40 ++++++++++++++++++++++++++++++++++++++++ 4 files changed, 149 insertions(+) create mode 100644 tools/testing/selftests/bpf/prog_tests/bpf_vma_build_id_parse.c create mode 100644 tools/testing/selftests/bpf/progs/bpf_vma_build_id_parse.c