From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755563AbcFQL4L (ORCPT ); Fri, 17 Jun 2016 07:56:11 -0400 Received: from www.linutronix.de ([62.245.132.108]:50281 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755453AbcFQL4J (ORCPT ); Fri, 17 Jun 2016 07:56:09 -0400 Date: Fri, 17 Jun 2016 13:53:53 +0200 (CEST) From: Thomas Gleixner To: Borislav Petkov cc: Ingo Molnar , Peter Zijlstra , lkml , John Stultz Subject: Re: ktime_get_ts64() splat during resume In-Reply-To: <20160617105435.GB15997@pd.tnic> Message-ID: References: <20160617105435.GB15997@pd.tnic> User-Agent: Alpine 2.11 (DEB 23 2013-08-11) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 17 Jun 2016, Borislav Petkov wrote: > look what I've found this morning during resume: > > [ 45.746236] BUG: unable to handle kernel done. > [ 45.752542] NULL pointer dereference at 0000000000000001 > [ 45.752544] IP: [<0000000000000001>] 0x1 > static inline cycle_t timekeeping_get_delta(struct tk_read_base *tkr) > { > cycle_t cycle_now, delta; > > /* read clocksource */ > cycle_now = tkr->read(tkr->clock); > ^^^^^^^^^^ > > Ring any bells about something corrupting tk_core.timekeeper.tkr_mono or > it being uninitialized after suspend? It must be initialized otherwise you won't reach suspend. I have no idea how that can happen. Thanks, tglx