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 X-Spam-Level: X-Spam-Status: No, score=-10.2 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 86F28C282C2 for ; Fri, 25 Jan 2019 23:19:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 50F5421902 for ; Fri, 25 Jan 2019 23:19:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548458372; bh=oC50OPzWvQu1UKkjNXhJQjYbFOTaHEK64t7zhHsR+v0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Aq48Oq8OhT7xoK7BAi1ke85KKpFxFoaiiI/ssVF2wjRbODcC7x9GuZK0f/BKNItvp Y6C3nr/GIBhWqph2W1HZdgMAuOqQx+En1SV/omXV1t6yTfVhUWMbqJYvPFSRYEECoG 5fNywykGsuhgQQ/JyIJ9WaqmghnaTc5kSIOtFA/E= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729877AbfAYXTa (ORCPT ); Fri, 25 Jan 2019 18:19:30 -0500 Received: from mail.kernel.org ([198.145.29.99]:47952 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729853AbfAYXT1 (ORCPT ); Fri, 25 Jan 2019 18:19:27 -0500 Received: from quaco.cust.in.nbox.cz (unknown [95.82.135.149]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id BB321218FF; Fri, 25 Jan 2019 23:19:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548458366; bh=oC50OPzWvQu1UKkjNXhJQjYbFOTaHEK64t7zhHsR+v0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=n5MCg6hgiii7x1Jza/Ralwu3/AoKc7DvGJG6htWhx1WQmrKo5vMwt4ToNY7wdZEUe 1KkfMrbGsIFZ8IaVCGUm4uSldbqXPOGy8lMW7axrHkEP2IAb0UK5ho5cUkwGl1mnxQ lg2RDdf8IZEw7GhP/GcAS0KVa45t2ex9recu83sQ= From: Arnaldo Carvalho de Melo To: Ingo Molnar Cc: Clark Williams , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, Song Liu , Arnaldo Carvalho de Melo , Jiri Olsa , Alexei Starovoitov , Daniel Borkmann , Peter Zijlstra , kernel-team@fb.com Subject: [PATCH 17/29] perf bpf: Fix synthesized PERF_RECORD_KSYMBOL/BPF_EVENT Date: Sat, 26 Jan 2019 00:18:31 +0100 Message-Id: <20190125231843.2895-18-acme@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190125231843.2895-1-acme@kernel.org> References: <20190125231843.2895-1-acme@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Song Liu Added missing machine->id_hdr_size to event->header.size. Also fixed size of PERF_RECORD_KSYMBOL by removing extra bytes for name. Committer notes: We need to malloc that extra machine->id_hdr_size at the start of perf_event__synthesize_bpf_events() and also need to cast the event to (void *) otherwise we segfault, fix it. Reported-by: Arnaldo Carvalho de Melo Suggested-by: Jiri Olsa Signed-off-by: Song Liu Acked-by: Jiri Olsa Tested-by: Arnaldo Carvalho de Melo Cc: Alexei Starovoitov Cc: Daniel Borkmann Cc: Peter Zijlstra Cc: kernel-team@fb.com Fixes: 7b612e291a5a ("perf tools: Synthesize PERF_RECORD_* for loaded BPF programs") Link: http://lkml.kernel.org/r/20190122210218.358664-1-songliubraving@fb.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/bpf-event.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/tools/perf/util/bpf-event.c b/tools/perf/util/bpf-event.c index 01e1dc1bb7fb..796ef793f4ce 100644 --- a/tools/perf/util/bpf-event.c +++ b/tools/perf/util/bpf-event.c @@ -7,6 +7,7 @@ #include "bpf-event.h" #include "debug.h" #include "symbol.h" +#include "machine.h" #define ptr_to_u64(ptr) ((__u64)(unsigned long)(ptr)) @@ -149,7 +150,7 @@ static int perf_event__synthesize_one_bpf_prog(struct perf_tool *tool, *ksymbol_event = (struct ksymbol_event){ .header = { .type = PERF_RECORD_KSYMBOL, - .size = sizeof(struct ksymbol_event), + .size = offsetof(struct ksymbol_event, name), }, .addr = prog_addrs[i], .len = prog_lens[i], @@ -178,6 +179,9 @@ static int perf_event__synthesize_one_bpf_prog(struct perf_tool *tool, ksymbol_event->header.size += PERF_ALIGN(name_len + 1, sizeof(u64)); + + memset((void *)event + event->header.size, 0, machine->id_hdr_size); + event->header.size += machine->id_hdr_size; err = perf_tool__process_synth_event(tool, event, machine, process); } @@ -194,6 +198,8 @@ static int perf_event__synthesize_one_bpf_prog(struct perf_tool *tool, .id = info.id, }; memcpy(bpf_event->tag, prog_tags[i], BPF_TAG_SIZE); + memset((void *)event + event->header.size, 0, machine->id_hdr_size); + event->header.size += machine->id_hdr_size; err = perf_tool__process_synth_event(tool, event, machine, process); } @@ -217,7 +223,7 @@ int perf_event__synthesize_bpf_events(struct perf_tool *tool, int err; int fd; - event = malloc(sizeof(event->bpf_event) + KSYM_NAME_LEN); + event = malloc(sizeof(event->bpf_event) + KSYM_NAME_LEN + machine->id_hdr_size); if (!event) return -1; while (true) { -- 2.20.1