Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755545Ab2JVQbH (ORCPT ); Mon, 22 Oct 2012 12:31:07 -0400 Received: from casper.infradead.org ([85.118.1.10]:56263 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755344Ab2JVQbF (ORCPT ); Mon, 22 Oct 2012 12:31:05 -0400 From: Arnaldo Carvalho de Melo To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, Arnaldo Carvalho de Melo , David Ahern , Frederic Weisbecker , Jiri Olsa , Mike Galbraith , Namhyung Kim , Paul Mackerras , Peter Zijlstra , Stephane Eranian Subject: [PATCH 1/5] perf trace: Validate syscall id before growing syscall table Date: Mon, 22 Oct 2012 14:30:21 -0200 Message-Id: <1350923425-15400-2-git-send-email-acme@infradead.org> X-Mailer: git-send-email 1.7.9.2.358.g22243 In-Reply-To: <1350923425-15400-1-git-send-email-acme@infradead.org> References: <1350923425-15400-1-git-send-email-acme@infradead.org> Content-Type: text/plain; charset="utf-8" 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 Content-Length: 2070 Lines: 58 From: Arnaldo Carvalho de Melo In some cases the ID for a syscall read thru the raw_syscalls tracepoint is bogus, still needs to be investigated why, but to make the tool more robust first try to resolve the ID to a name via libaudit and if it fails, don't grow the table. Cc: David Ahern Cc: Frederic Weisbecker Cc: Jiri Olsa Cc: Mike Galbraith Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lkml.kernel.org/n/tip-0lsokw3xor7c4ijo45u6bauh@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-trace.c | 11 ++++++----- 1 files changed, 6 insertions(+), 5 deletions(-) diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index dec8ced..83c6515 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -56,6 +56,10 @@ static int trace__read_syscall_info(struct trace *trace, int id) { char tp_name[128]; struct syscall *sc; + const char *name = audit_syscall_to_name(id, trace->audit_machine); + + if (name == NULL) + return -1; if (id > trace->syscalls.max) { struct syscall *nsyscalls = realloc(trace->syscalls.table, (id + 1) * sizeof(*sc)); @@ -75,11 +79,8 @@ static int trace__read_syscall_info(struct trace *trace, int id) } sc = trace->syscalls.table + id; - sc->name = audit_syscall_to_name(id, trace->audit_machine); - if (sc->name == NULL) - return -1; - - sc->fmt = syscall_fmt__find(sc->name); + sc->name = name; + sc->fmt = syscall_fmt__find(sc->name); snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name); sc->tp_format = event_format__new("syscalls", tp_name); -- 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/