Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757328Ab2HTQa3 (ORCPT ); Mon, 20 Aug 2012 12:30:29 -0400 Received: from merlin.infradead.org ([205.233.59.134]:56351 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754685Ab2HTQ0m (ORCPT ); Mon, 20 Aug 2012 12:26:42 -0400 From: Arnaldo Carvalho de Melo To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, Robert Richter , Jiri Olsa , Peter Zijlstra , Arnaldo Carvalho de Melo Subject: [PATCH 14/24] perf tools: Fix type for evsel->ids and add size check for ids Date: Mon, 20 Aug 2012 13:26:15 -0300 Message-Id: <1345479985-18669-15-git-send-email-acme@infradead.org> X-Mailer: git-send-email 1.7.9.2.358.g22243 In-Reply-To: <1345479985-18669-1-git-send-email-acme@infradead.org> References: <1345479985-18669-1-git-send-email-acme@infradead.org> Content-Type: text/plain; charset="UTF-8" X-SRS-Rewrite: SMTP reverse-path rewritten from by canuck.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3216 Lines: 94 From: Robert Richter Use same type for ids everywhere. In case of writing to perf.data the size is u32. In pipe mode it is limited to header.size (less than u16). Adding a size check here. Size overflow due to casting shouldn't actually happen in practice, but during development this may cause type missmatch warninngs/errors, unifying types avoids this. Signed-off-by: Robert Richter Cc: Ingo Molnar Cc: Jiri Olsa Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1345144224-27280-2-git-send-email-robert.richter@amd.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/evsel.h | 2 +- tools/perf/util/header.c | 11 +++++++---- tools/perf/util/header.h | 2 +- 3 files changed, 9 insertions(+), 6 deletions(-) diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h index 65f39fd..94f6ba1 100644 --- a/tools/perf/util/evsel.h +++ b/tools/perf/util/evsel.h @@ -53,7 +53,7 @@ struct perf_evsel { u64 *id; struct perf_counts *counts; int idx; - int ids; + u32 ids; struct hists hists; char *name; struct event_format *tp_format; diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c index 77832b8..471b0c4 100644 --- a/tools/perf/util/header.c +++ b/tools/perf/util/header.c @@ -2240,7 +2240,7 @@ out_delete_evlist: } int perf_event__synthesize_attr(struct perf_tool *tool, - struct perf_event_attr *attr, u16 ids, u64 *id, + struct perf_event_attr *attr, u32 ids, u64 *id, perf_event__handler_t process) { union perf_event *ev; @@ -2261,9 +2261,12 @@ int perf_event__synthesize_attr(struct perf_tool *tool, memcpy(ev->attr.id, id, ids * sizeof(u64)); ev->attr.header.type = PERF_RECORD_HEADER_ATTR; - ev->attr.header.size = size; + ev->attr.header.size = (u16)size; - err = process(tool, ev, NULL, NULL); + if (ev->attr.header.size == size) + err = process(tool, ev, NULL, NULL); + else + err = -E2BIG; free(ev); @@ -2292,7 +2295,7 @@ int perf_event__synthesize_attrs(struct perf_tool *tool, int perf_event__process_attr(union perf_event *event, struct perf_evlist **pevlist) { - unsigned int i, ids, n_ids; + u32 i, ids, n_ids; struct perf_evsel *evsel; struct perf_evlist *evlist = *pevlist; diff --git a/tools/perf/util/header.h b/tools/perf/util/header.h index 2d42b3e..24962e7 100644 --- a/tools/perf/util/header.h +++ b/tools/perf/util/header.h @@ -99,7 +99,7 @@ int build_id_cache__add_s(const char *sbuild_id, const char *debugdir, int build_id_cache__remove_s(const char *sbuild_id, const char *debugdir); int perf_event__synthesize_attr(struct perf_tool *tool, - struct perf_event_attr *attr, u16 ids, u64 *id, + struct perf_event_attr *attr, u32 ids, u64 *id, perf_event__handler_t process); int perf_event__synthesize_attrs(struct perf_tool *tool, struct perf_session *session, -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/