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=-9.1 required=3.0 tests=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 56958C43381 for ; Wed, 27 Mar 2019 18:15:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 268012183E for ; Wed, 27 Mar 2019 18:15:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1553710529; bh=LEPFivfZ0rWQl327O/l94O075D9tVCI5pZhcM9wt5V8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=DGbQsAOrU4QUDiQljE0EbekFHwhztZQXm3iyJzypEv/+T/g7RmgmJQOwQgFm5bCLD z3zr8/Ig+qeVQORtiaXsaHtHhzDwFitaq2CIup4vYx68cAsrUqxqE5ZRyajjxktoNp EH8gG+CAwuY+wnv7XOCno+oIMgEB0NJyudxoMt6w= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389836AbfC0SP2 (ORCPT ); Wed, 27 Mar 2019 14:15:28 -0400 Received: from mail.kernel.org ([198.145.29.99]:58960 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389551AbfC0SPY (ORCPT ); Wed, 27 Mar 2019 14:15:24 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id BB77E2082F; Wed, 27 Mar 2019 18:15:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1553710523; bh=LEPFivfZ0rWQl327O/l94O075D9tVCI5pZhcM9wt5V8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=nx8Jsco7jWjAykt0KDITMjqwuYyWDUrr3yO7wp8p9LbgixfKopwCWhqNkdazbmBVB CmIjjEPS2wBUiaaHC/RlR1L+r48F9DeyLnXI9o0WKlH6hFFSmZ2puN2VjXcttzkFIr TBNnjc5wclq6vHTx+1TInC8PDb+wh33qZa6huJ3Y= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Tony Jones , =?UTF-8?q?Jaroslav=20=C5=A0karvada?= , Jonathan Corbet , Ravi Bangoria , Seeteena Thoufeek , Arnaldo Carvalho de Melo , Sasha Levin Subject: [PATCH AUTOSEL 4.19 157/192] perf script python: Use PyBytes for attr in trace-event-python Date: Wed, 27 Mar 2019 14:09:49 -0400 Message-Id: <20190327181025.13507-157-sashal@kernel.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20190327181025.13507-1-sashal@kernel.org> References: <20190327181025.13507-1-sashal@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Tony Jones [ Upstream commit 72e0b15cb24a497d7d0d4707cf51ff40c185ae8c ] With Python3. PyUnicode_FromStringAndSize is unsafe to call on attr and will return NULL. Use _PyBytes_FromStringAndSize (as with raw_buf). Below is the observed behavior without the fix. Note it is first necessary to apply the prior fix (Add trace_context extension module to sys,modules): # ldd /usr/bin/perf | grep -i python libpython3.6m.so.1.0 => /usr/lib64/libpython3.6m.so.1.0 (0x00007f8e1dfb2000) # perf record -e raw_syscalls:sys_enter /bin/false [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.018 MB perf.data (21 samples) ] # perf script -g python | cat generated Python script: perf-script.py # perf script -s ./perf-script.py in trace_begin Segmentation fault (core dumped) Signed-off-by: Tony Jones Acked-by: Jiri Olsa Tested-by: Arnaldo Carvalho de Melo Cc: Jaroslav Škarvada Cc: Jonathan Corbet Cc: Ravi Bangoria Cc: Seeteena Thoufeek Fixes: 66dfdff03d19 ("perf tools: Add Python 3 support") Link: http://lkml.kernel.org/r/20190124005229.16146-3-tonyj@suse.de Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Sasha Levin --- tools/perf/util/scripting-engines/trace-event-python.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/tools/perf/util/scripting-engines/trace-event-python.c b/tools/perf/util/scripting-engines/trace-event-python.c index 05d95de14e20..fb11396ec861 100644 --- a/tools/perf/util/scripting-engines/trace-event-python.c +++ b/tools/perf/util/scripting-engines/trace-event-python.c @@ -733,8 +733,7 @@ static PyObject *get_perf_sample_dict(struct perf_sample *sample, Py_FatalError("couldn't create Python dictionary"); pydict_set_item_string_decref(dict, "ev_name", _PyUnicode_FromString(perf_evsel__name(evsel))); - pydict_set_item_string_decref(dict, "attr", _PyUnicode_FromStringAndSize( - (const char *)&evsel->attr, sizeof(evsel->attr))); + pydict_set_item_string_decref(dict, "attr", _PyBytes_FromStringAndSize((const char *)&evsel->attr, sizeof(evsel->attr))); pydict_set_item_string_decref(dict_sample, "pid", _PyLong_FromLong(sample->pid)); -- 2.19.1