From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752876AbbKKV5I (ORCPT ); Wed, 11 Nov 2015 16:57:08 -0500 Received: from casper.infradead.org ([85.118.1.10]:55709 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752793AbbKKV5F (ORCPT ); Wed, 11 Nov 2015 16:57:05 -0500 From: Arnaldo Carvalho de Melo To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, Wang Nan , Jiri Olsa , Namhyung Kim , Zefan Li , pi3orama@163.com, Arnaldo Carvalho de Melo Subject: [PATCH 4/5] perf probe: Verify parameters in two functions Date: Wed, 11 Nov 2015 18:56:15 -0300 Message-Id: <1447278976-25009-5-git-send-email-acme@kernel.org> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1447278976-25009-1-git-send-email-acme@kernel.org> References: <1447278976-25009-1-git-send-email-acme@kernel.org> X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.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 From: Wang Nan On kernel with only one out of CONFIG_KPROBE_EVENTS and CONFIG_UPROBE_EVENTS enabled, 'perf probe -d' causes a segfault because perf_del_probe_events() calls probe_file__get_events() with a negative fd. This patch fixes it by adding parameter validation at the entry of probe_file__get_events() and probe_file__get_rawlist(). Since they are both non-static public functions (in .h file), parameter verifying is required. v1 -> v2: Verify fd at the head of probe_file__get_rawlist() instead of checking at call site (suggested by Masami and Arnaldo at [1,2]). [1] http://lkml.kernel.org/r/50399556C9727B4D88A595C8584AAB37526048E3@GSjpTKYDCembx32.service.hitachi.net [2] http://lkml.kernel.org/r/20151105155830.GV13236@kernel.org Signed-off-by: Wang Nan Acked-by: Masami Hiramatsu Cc: Jiri Olsa Cc: Namhyung Kim Cc: Zefan Li Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1446803415-83382-1-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/probe-file.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/tools/perf/util/probe-file.c b/tools/perf/util/probe-file.c index 89dbeb92c68e..e3b3b92e4458 100644 --- a/tools/perf/util/probe-file.c +++ b/tools/perf/util/probe-file.c @@ -138,6 +138,9 @@ struct strlist *probe_file__get_rawlist(int fd) char *p; struct strlist *sl; + if (fd < 0) + return NULL; + sl = strlist__new(NULL, NULL); fp = fdopen(dup(fd), "r"); @@ -271,6 +274,9 @@ int probe_file__get_events(int fd, struct strfilter *filter, const char *p; int ret = -ENOENT; + if (!plist) + return -EINVAL; + namelist = __probe_file__get_namelist(fd, true); if (!namelist) return -ENOENT; -- 2.1.0