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=-14.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 013D4C10F05 for ; Thu, 4 Apr 2019 09:25:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B7C7B20693 for ; Thu, 4 Apr 2019 09:25:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1554369926; bh=MW3QXtTB3k8m5N7D6z9Bv0AB/+N9url5x7poAwKSVr0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=wHVwnYleYqH6/CL2v1MCVz2bh3Kpzv9Xq1P05xvtwY1ikvTMR9UjOzRIzDoBIprug XVJqekLJJkILBC6JtxOFI5LwzPpL4h3ACgHwUuf1Yi7t0YuPuqaZX15M5gR/UTTTax MekZDkhKfnyoh7Nxoe5gKNKkHDC47kcZ+Kd+5bfY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387641AbfDDJOA (ORCPT ); Thu, 4 Apr 2019 05:14:00 -0400 Received: from mail.kernel.org ([198.145.29.99]:54352 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387637AbfDDJNz (ORCPT ); Thu, 4 Apr 2019 05:13:55 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (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 ABF672075E; Thu, 4 Apr 2019 09:13:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1554369235; bh=MW3QXtTB3k8m5N7D6z9Bv0AB/+N9url5x7poAwKSVr0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bEOeWOjr4sKJIMW8DXPjS/aDxSks57UqEif9wMC/03TZZxzbRLvnII2cSM88a/wkg k0l2m4igJuu1axBpzc8c4ZXk5W4m+Wm1m8xhWeubnq6Gix0S+5N4SusVB1sj4L8WG9 NLfQFQoV60PzIS9RGqXyfvqR1LisycLRhpOqPaxY= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Adrian Hunter , Jiri Olsa , =?UTF-8?q?Luis=20Cl=C3=A1udio=20Gon=C3=A7alves?= , Namhyung Kim , Wang Nan , Arnaldo Carvalho de Melo , Sasha Levin Subject: [PATCH 5.0 134/246] perf trace: Check if the fd is negative when mapping it to pathname Date: Thu, 4 Apr 2019 10:47:14 +0200 Message-Id: <20190404084623.857259861@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190404084619.236418459@linuxfoundation.org> References: <20190404084619.236418459@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org 5.0-stable review patch. If anyone has any objections, please let me know. ------------------ [ Upstream commit 051074867434cc520c08f188479d4757dcfdaef8 ] We were crashing when processing a negative fd: Program received signal SIGSEGV, Segmentation fault. 0x0000000000609bbf in syscall_arg__scnprintf_ioctl_cmd (bf=0x1172eca "", size=2038, arg=0x7fffffff8360) at trace/beauty/ioctl.c:182 182 if (file->dev_maj == USB_DEVICE_MAJOR) Missing separate debuginfos, use: dnf debuginfo-install bzip2-libs-1.0.6-28.fc29.x86_64 elfutils-libelf-0.174-5.fc29.x86_64 elfutils-libs-0.174-5.fc29.x86_64 glib2-2.58.3-1.fc29.x86_64 libbabeltrace-1.5.6-1.fc29.x86_64 libunwind-1.2.1-6.fc29.x86_64 libuuid-2.32.1-1.fc29.x86_64 libxcrypt-4.4.3-2.fc29.x86_64 numactl-libs-2.0.12-1.fc29.x86_64 openssl-libs-1.1.1a-1.fc29.x86_64 pcre-8.42-6.fc29.x86_64 perl-libs-5.28.1-427.fc29.x86_64 popt-1.16-15.fc29.x86_64 python2-libs-2.7.15-11.fc29.x86_64 slang-2.3.2-4.fc29.x86_64 xz-libs-5.2.4-3.fc29.x86_64 (gdb) bt #0 0x0000000000609bbf in syscall_arg__scnprintf_ioctl_cmd (bf=0x1172eca "", size=2038, arg=0x7fffffff8360) at trace/beauty/ioctl.c:182 #1 0x000000000048e295 in syscall__scnprintf_val (sc=0x123b500, bf=0x1172eca "", size=2038, arg=0x7fffffff8360, val=21519) at builtin-trace.c:1594 #2 0x000000000048e60d in syscall__scnprintf_args (sc=0x123b500, bf=0x1172ec6 "-1, ", size=2042, args=0x7ffff6a7c034 "\377\377\377\377", augmented_args=0x7ffff6a7c064, augmented_args_size=4, trace=0x7fffffffa8d0, thread=0x1175cd0) at builtin-trace.c:1661 #3 0x000000000048f04e in trace__sys_enter (trace=0x7fffffffa8d0, evsel=0xb260b0, event=0x7ffff6a7bfe8, sample=0x7fffffff84f0) at builtin-trace.c:1880 #4 0x00000000004915a4 in trace__handle_event (trace=0x7fffffffa8d0, event=0x7ffff6a7bfe8, sample=0x7fffffff84f0) at builtin-trace.c:2590 #5 0x0000000000491eed in __trace__deliver_event (trace=0x7fffffffa8d0, event=0x7ffff6a7bfe8) at builtin-trace.c:2818 #6 0x0000000000492030 in trace__deliver_event (trace=0x7fffffffa8d0, event=0x7ffff6a7bfe8) at builtin-trace.c:2845 #7 0x0000000000492896 in trace__run (trace=0x7fffffffa8d0, argc=0, argv=0x7fffffffdb58) at builtin-trace.c:3040 #8 0x000000000049603a in cmd_trace (argc=0, argv=0x7fffffffdb58) at builtin-trace.c:3952 #9 0x00000000004d5103 in main (argc=1, argv=0x7fffffffdb58) at perf.c:474 (gdb) p fd $1 = -1 (gdb) p file $7 = (struct file *) 0xfffffffffffffff0 (gdb) p ((struct thread_trace *)arg->thread)->files.table + fd $8 = (struct file *) 0xfffffffffffffff0 (gdb) Check for that and return NULL instead. This problem was introduced recently, the other codepaths leading to thread_trace__files_entry() check for negative fds, like thread__fd_path(), but we need to do it at thread_trace__files_entry() as more users are now calling it directly. Cc: Adrian Hunter Cc: Jiri Olsa Cc: Luis Cláudio Gonçalves Cc: Namhyung Kim Cc: Wang Nan Fixes: 2d473389f87a ("perf trace beauty: Export function to get the files for a thread") Link: https://lkml.kernel.org/n/tip-oq7bvaaf07gsd4yqty3107u2@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Sasha Levin --- tools/perf/builtin-trace.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index b36061cd1ab8..2776ff8c3e81 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -1039,6 +1039,9 @@ static const size_t trace__entry_str_size = 2048; static struct file *thread_trace__files_entry(struct thread_trace *ttrace, int fd) { + if (fd < 0) + return NULL; + if (fd > ttrace->files.max) { struct file *nfiles = realloc(ttrace->files.table, (fd + 1) * sizeof(struct file)); -- 2.19.1