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 37A8CC433FE for ; Fri, 18 Nov 2022 15:40:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231194AbiKRPki (ORCPT ); Fri, 18 Nov 2022 10:40:38 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53824 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235243AbiKRPkh (ORCPT ); Fri, 18 Nov 2022 10:40:37 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CB71B15A21 for ; Fri, 18 Nov 2022 07:40:35 -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 ams.source.kernel.org (Postfix) with ESMTPS id 8B430B8244F for ; Fri, 18 Nov 2022 15:40:34 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C064AC433D6; Fri, 18 Nov 2022 15:40:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1668786033; bh=/sE9dvVNL4WMRhMC/tbSFEO1XcCXIc/v9kH5tnU3I6Y=; h=From:To:Cc:Subject:Date:From; b=GO1wY3D6XJdmitZekafqPIme2xctwgAn0tGMI0cz0tgKyRrY0aj2EP/tiuu/W9GQ4 rLr9NFwqfcsZhDHSwi7kC9q4681dQwOPvIAlMu8wD7X4qvarQMxeNkaFl+XN8YIbaT Mh67udlgmVMZnGnmUmgWVyXY9X7V0ixXRKXo09kOUrk7/0MLNEJhLz4gpZ8p1jF2eR LMnQwuiPa3SDN5/Ov+J263jHVQZN6De94tkCVZWvODszn/yzfisv/mZqMFT0CZAiGD 9joWX0UD4D8xLhG4orwo1NlhlNTYmPkNN55FBY+ZBqar4GtKysNVD2qs857tFtD3Ao 6n7g3aJ63A8/g== 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: [PATCHv3 bpf-next 0/2] bpf: Add bpf_vma_build_id_parse kfunc Date: Fri, 18 Nov 2022 16:40:26 +0100 Message-Id: <20221118154028.251399-1-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. v3 changes: - restrict bpf_vma_build_id_parse to bpf_find_vma callback - move bpf_vma_build_id_parse to kernel/trace/bpf_trace.c and add new tracing_kfunc_set 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 | 4 ++++ kernel/bpf/verifier.c | 26 ++++++++++++++++++++++++++ kernel/trace/bpf_trace.c | 31 +++++++++++++++++++++++++++++++ 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 ++++++++++++++++++++++++++++++++++++++++ 5 files changed, 189 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