From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965473AbcJXQ2M (ORCPT ); Mon, 24 Oct 2016 12:28:12 -0400 Received: from merlin.infradead.org ([205.233.59.134]:56532 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757737AbcJXQV3 (ORCPT ); Mon, 24 Oct 2016 12:21:29 -0400 From: Arnaldo Carvalho de Melo To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, Stefano Sanfilippo , Ross McIlroy , Anton Blanchard , Jiri Olsa , Namhyung Kim , Peter Zijlstra , Arnaldo Carvalho de Melo Subject: [PATCH 24/37] perf jit: Check JITHEADER_VERSION Date: Mon, 24 Oct 2016 13:20:44 -0300 Message-Id: <1477326057-24080-25-git-send-email-acme@kernel.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1477326057-24080-1-git-send-email-acme@kernel.org> References: <1477326057-24080-1-git-send-email-acme@kernel.org> X-SRS-Rewrite: SMTP reverse-path rewritten from by merlin.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: Stefano Sanfilippo Check the version number when opening a jitdump file. Accept older versions, but not newer ones. Signed-off-by: Stefano Sanfilippo Signed-off-by: Ross McIlroy Reviewed-by: Stephane Eranian Cc: Anton Blanchard Cc: Jiri Olsa Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1476356383-30100-9-git-send-email-eranian@google.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/jitdump.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/tools/perf/util/jitdump.c b/tools/perf/util/jitdump.c index 6a2688da3c4a..c9a941ef0f6d 100644 --- a/tools/perf/util/jitdump.c +++ b/tools/perf/util/jitdump.c @@ -180,6 +180,12 @@ jit_open(struct jit_buf_desc *jd, const char *name) header.elf_mach, jd->use_arch_timestamp); + if (header.version > JITHEADER_VERSION) { + pr_err("wrong jitdump version %u, expected " STR(JITHEADER_VERSION), + header.version); + goto error; + } + if (header.flags & JITDUMP_FLAGS_RESERVED) { pr_err("jitdump file contains invalid or unsupported flags 0x%llx\n", (unsigned long long)header.flags & JITDUMP_FLAGS_RESERVED); -- 2.7.4