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=-4.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED 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 B890AC43612 for ; Thu, 10 Jan 2019 17:12:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9452D214DA for ; Thu, 10 Jan 2019 17:12:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729486AbfAJRMf (ORCPT ); Thu, 10 Jan 2019 12:12:35 -0500 Received: from mail.kernel.org ([198.145.29.99]:53152 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729346AbfAJRMe (ORCPT ); Thu, 10 Jan 2019 12:12:34 -0500 Received: from gandalf.local.home (cpe-66-24-56-78.stny.res.rr.com [66.24.56.78]) (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 6B27020874; Thu, 10 Jan 2019 17:12:33 +0000 (UTC) Date: Thu, 10 Jan 2019 12:12:31 -0500 From: Steven Rostedt To: Masami Hiramatsu Cc: Ingo Molnar , peterz@infradead.org, Mathieu Desnoyers , linux-kernel , Andrea Righi , stable@vger.kernel.org Subject: Re: [PATCH 6/9] kprobes: Prohibit probing on hardirq tracers Message-ID: <20190110121231.446b3396@gandalf.local.home> In-Reply-To: <154708901305.6325.18088274750877716004.stgit@devbox> References: <154708884117.6325.4454464467156828009.stgit@devbox> <154708901305.6325.18088274750877716004.stgit@devbox> X-Mailer: Claws Mail 3.16.0 (GTK+ 2.24.32; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 10 Jan 2019 11:56:53 +0900 Masami Hiramatsu wrote: > Since kprobes breakpoint handling involves hardirq tracer, > probing these functions cause breakpoint recursion problem. > > Prohibit probing on those functions. > > Signed-off-by: Masami Hiramatsu > --- > kernel/trace/trace_irqsoff.c | 9 +++++++-- > kernel/trace/trace_preemptirq.c | 5 +++++ > 2 files changed, 12 insertions(+), 2 deletions(-) > Acked-by: Steven Rostedt (VMware) -- Steve