From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753211AbdBUWOh (ORCPT ); Tue, 21 Feb 2017 17:14:37 -0500 Received: from atrey.karlin.mff.cuni.cz ([195.113.26.193]:53970 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752798AbdBUWOV (ORCPT ); Tue, 21 Feb 2017 17:14:21 -0500 Date: Tue, 21 Feb 2017 23:14:18 +0100 From: Pavel Machek To: kernel list , jpoimboe@redhat.com, mingo@kernel.org Cc: luto@kernel.org, bp@alien8.de, brgerst@gmail.com, dvlasenk@redhat.com, hpa@zytor.com, torvalds@linux-foundation.org, peterz@infradead.org, tglx@linutronix.de Subject: v4.10: kernel stack frame pointer .. has bad value (null) Message-ID: <20170221221418.GA6918@amd> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="J2SCkAp4GZ/dPZZf" Content-Disposition: inline User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --J2SCkAp4GZ/dPZZf Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi! Thinkpad X220, in 32 bit mode... and I'm getting rather scary messages =66rom kernel during boot: Git blame says that message comes from commit commit 24d86f59093b0bcb3756cdf47f2db10ff4e90dbb Author: Josh Poimboeuf Date: Thu Oct 27 08:10:58 2016 -0500 x86/unwind: Ensure stack grows down Add a sanity check to ensure the stack only grows down, and print a warning if the check fails. Any ideas? Pavel [ 1.047295] [drm] Memory usable by graphics device =3D 2048M [ 1.047356] [drm] Replacing VGA console driver [ 1.048029] Console: switching to colour dummy device 80x25 [ 1.048348] WARNING: kernel stack frame pointer at f50cdf98 in swapper/2:0 has bad value (null) [ 1.048349] unwind stack type:0 next_sp: (null) mask:a graph_idx:0 [ 1.048352] f50cdebc: 00000000f50cdec4 (0xf50cdec4) [ 1.048356] f50cdec0: 00000000c40489b7 (irq_exit+0x87/0xa0) [ 1.048357] f50cdec4: 00000000f50cded0 (0xf50cded0) [ 1.048361] f50cdec8: 00000000c402f6d3 (smp_apic_timer_interrupt+0x33/0x40) [ 1.048362] f50cdecc: 000000003e7c28eb (0x3e7c28eb) [ 1.048363] f50cded0: 00000000f50cded9 (0xf50cded9) [ 1.048366] f50cded4: 00000000c4b7ac8e (apic_timer_interrupt+0x36/0x3c) [ 1.048367] f50cded8: 000000003e7c28eb (0x3e7c28eb) [ 1.048368] f50cdedc: 0000000000000001 (0x1) [ 1.048370] f50cdee0: 00000000f57c41c0 (0xf57c41c0) [ 1.048370] f50cdee4: 0000000000000000 ... [ 1.048371] f50cdee8: 0000000000000002 (0x2) [ 1.048372] f50cdeec: 00000000f50cdf30 (0xf50cdf30) [ 1.048373] f50cdef0: 000000003e7c28eb (0x3e7c28eb) [ 1.048376] f50cdef4: 00000000c506007b (cltrack_prog+0x7fb/0x1000) [ 1.048377] f50cdef8: 000000000000007b (0x7b) [ 1.048378] f50cdefc: 00000000000000d8 (0xd8) [ 1.048379] f50cdf00: 00000000c50600e0 (cltrack_prog+0x860/0x1000) [ 1.048380] f50cdf04: 00000000ffffff10 (0xffffff10) [ 1.048384] f50cdf08: 00000000c48d05b5 (cpuidle_enter_state+0xf5/0x220) [ 1.048384] f50cdf0c: 0000000000000060 (0x60) [ 1.048385] f50cdf10: 0000000000200286 (0x200286) [ 1.048386] f50cdf14: 0000000000000000 ... [ 1.048387] f50cdf18: 00000000ffb8fad0 (0xffb8fad0) [ 1.048388] f50cdf1c: 000000003e6bbd2b (0x3e6bbd2b) [ 1.048389] f50cdf20: 0000000000000000 ... [ 1.048391] f50cdf24: 00000000c506c680 (max_cstate+0x2c/0x2c) [ 1.048394] f50cdf28: 00000000c506c680 (max_cstate+0x2c/0x2c) [ 1.048394] f50cdf2c: 00000000f50a2040 (0xf50a2040) [ 1.048395] f50cdf30: 00000000f50cdf3c (0xf50cdf3c) [ 1.048397] f50cdf34: 00000000c48d06ff (cpuidle_enter+0xf/0x20) [ 1.048398] f50cdf38: 0000000000000000 ... [ 1.048399] f50cdf3c: 00000000f50cdf48 (0xf50cdf48) [ 1.048402] f50cdf40: 00000000c4083113 (call_cpuidle+0x23/0x40) [ 1.048403] f50cdf44: 00000000ffb8fad0 (0xffb8fad0) [ 1.048404] f50cdf48: 00000000f50cdf60 (0xf50cdf60) [ 1.048406] f50cdf4c: 00000000c4083364 (do_idle+0x174/0x1d0) [ 1.048407] f50cdf50: 00000000f50a2040 (0xf50a2040) [ 1.048408] f50cdf54: 000000008c0ed583 (0x8c0ed583) [ 1.048409] f50cdf58: 0000000000000087 (0x87) [ 1.048410] f50cdf5c: 000000009779245f (0x9779245f) [ 1.048411] f50cdf60: 00000000f50cdf78 (0xf50cdf78) [ 1.048413] f50cdf64: 00000000c408361d (cpu_startup_entry+0x5d/0x60) [ 1.048414] f50cdf68: 0000000033ee4c15 (0x33ee4c15) [ 1.048415] f50cdf6c: 00000000c9d84398 (0xc9d84398) [ 1.048417] f50cdf70: 0000000002100800 (0x2100800) [ 1.048418] f50cdf74: 000000000fdc6fb2 (0xfdc6fb2) [ 1.048418] f50cdf78: 00000000f50cdf98 (0xf50cdf98) [ 1.048421] f50cdf7c: 00000000c402d216 (start_secondary+0x176/0x1c0) [ 1.048422] f50cdf80: 000000000fdc6fb2 (0xfdc6fb2) [ 1.048423] f50cdf84: 00000000d5425adc (0xd5425adc) [ 1.048424] f50cdf88: 0000000000000002 (0x2) [ 1.048425] f50cdf8c: 00000000ffffffff (0xffffffff) [ 1.048425] f50cdf90: 0000000000000000 ... [ 1.048426] f50cdf94: 00000000f50cdfac (0xf50cdfac) [ 1.048427] f50cdf98: 0000000000000000 ... [ 1.048429] f50cdf9c: 00000000c4000237 (startup_32_smp+0x16b/0x16d) [ 1.048429] f50cdfa0: 0000000000200002 (0x200002) [ 1.048430] f50cdfa4: 0000000000000000 ... [ 1.048432] f50cdfa8: 00000000c4000237 (startup_32_smp+0x16b/0x16d) [ 1.048432] f50cdfac: 0000000000000000 ... [ 1.048433] f50cdff4: 0000000000000100 (0x100) [ 1.048434] f50cdff8: 0000000000000200 (0x200) [ 1.048435] f50cdffc: 0000000000000000 ... [ 1.060368] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013). [ 1.060373] [drm] Driver supports precise vblank timestamp query. [ 1.061668] i915 0000:00:02.0: vgaarb: changed VGA decodes: olddecodes=3Dio+mem,decodes=3Dio+mem:owns=3Dio+mem [ 1.146917] ACPI: Video Device [VID] (multi-head: yes rom: no post: no) --=20 (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blo= g.html --J2SCkAp4GZ/dPZZf Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iEYEARECAAYFAlisu7oACgkQMOfwapXb+vIV7gCggCL6iaxpVGZ4sDiFHmSSTxN+ xgEAmQEllpKtNBr0llnZujTt3EhM2+Oo =ar8o -----END PGP SIGNATURE----- --J2SCkAp4GZ/dPZZf--