From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wolfram Sang Subject: Re: next-20160314 - crash in i2c_dev_init/bus_register_notifier at boot Date: Thu, 17 Mar 2016 21:52:25 +0100 Message-ID: <20160317205225.GA1482@katana> References: <5769.1458226791@turing-police.cc.vt.edu> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="/04w6evG8XlLl3ft" Return-path: Received: from sauhun.de ([89.238.76.85]:58210 "EHLO pokefinder.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1030465AbcCQUwc (ORCPT ); Thu, 17 Mar 2016 16:52:32 -0400 Content-Disposition: inline In-Reply-To: <5769.1458226791@turing-police.cc.vt.edu> Sender: linux-i2c-owner@vger.kernel.org List-Id: linux-i2c@vger.kernel.org To: Valdis Kletnieks Cc: linux-kernel@vger.kernel.org, linux-i2c@vger.kernel.org --/04w6evG8XlLl3ft Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Mar 17, 2016 at 10:59:51AM -0400, Valdis Kletnieks wrote: > Seeing this consistent crash on next-20160314. Sorry for shortened trace= back, > hand-transcribed as the crash doesn't get logged to /sys/fs/pstore as > expected. next-20160307 works just fine. >=20 > BUG: unable to handle kernel NULL pointer dereference at 000000000260 > IP: blocking_notifier_chain_register+0x37/0xd0 > ... > Call Trace: > bus_register_notifier+0x1c/0x20 > i2c_dev_init+0x9c/0xf2 > do_one_initcall_+0x99/0x210 > ? set_debug_rodata+0x12/0x12 > kernel_init_freeable+0x1b3/0x240 > kernel_init+0x3/0x100 >=20 > 'git blame' doesn't seem to find anything relevant and recent in > kernel/notifier.c or drivers/i2c/i2c-dev.c. Does this ring any > bells, or is it time to bisect? Can you try a newer -next or apply this patch on top? https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/patch/driv= ers/i2c?id=3Db980a26d02d1f54be31346666222304fcd27ea33 I think this should solve it. Thanks for reporting! Wolfram --/04w6evG8XlLl3ft Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAEBAgAGBQJW6xkJAAoJEBQN5MwUoCm2/zUQAKxPbYfxEmiUH3uNPdnssOtK 1W2aiu4QHBnZqKloCH2Us+cvxMrm0z+VH8nbLwpakl1257B5jmxSDn9vQBFcjx3u iwvG+12GmQ/dLRBYoINLO/mne5sroEJwZCRCPeaOP2P/hrAkUMcJvsmRlLumGcb+ zvYWtTNtM0CI3VRmcsksp5THCdx5BC5+iN5l5dM4FI/ESQixaBIDtS/XII3LhVGM O1THxqR2cfoMO3/GGq5f3Csudu9JtZ57hvnLNflO6jWP7lLIZh5xkTgkMVz4slEL TMjih6G0qUPQZDu8qR+x7zV2M+CV8mmTlh4jo7sO2lUcG2oPk0a8Z7YkL9plBq5s /QWqZOk+CcZX+rQ7gtHgmyP73WKIxkDn9iGzRmTbdKAEv53cdnS1bKR7Bw1ijjr+ 9sNE378qdGn+47b6VxrJuKECNcOOzMFPQcdeEfc33b6S6knIaqahUj4/kJ0W2Iz2 37cAgny8WGSgize5LrXvX+LPjWF3tQOpFqQ7KnXlqWx9GTByMqexUp3Roa75lwFG kvKvFmsUNx9/+Yhd/vS4gR3HgaFJ5HHNGPC5BgNguFGSQLRJarU70kmGzd3bWUmp HG5T3C2ZI8I2l8Iczfh2OdduBe5dvdjUbZqxdfi8Ft7VNjYt2SkLc+zBcr1OBMXa P1NjEyVhuD2ZDTZzhGR8 =RQSs -----END PGP SIGNATURE----- --/04w6evG8XlLl3ft--