From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751494AbbGLID3 (ORCPT ); Sun, 12 Jul 2015 04:03:29 -0400 Received: from mail-wg0-f67.google.com ([74.125.82.67]:36019 "EHLO mail-wg0-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751011AbbGLID1 (ORCPT ); Sun, 12 Jul 2015 04:03:27 -0400 MIME-Version: 1.0 Date: Sun, 12 Jul 2015 10:03:25 +0200 Message-ID: Subject: [4.2.0-rc1-00201-g59c3cb5] Regression: kernel NULL pointer dereference From: =?UTF-8?Q?J=C3=B6rg_Otte?= To: David Airlie , Linus Torvalds , Daniel Vetter , dri-devel@lists.freedesktop.org, Linux Kernel Mailing List Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.2.0-rc1-00201-g59c3cb5 introducued a null pointer derefence and a system freeze when Xorg is started ( 4.2.0-rc1-00062-gc4b5fd3 was fine) : BUG: unable to handle kernel NULL pointer dereference at 0000000000000009 IP: [] 0xffffffffbd3447bb PGD 0 Oops: 0000 [#1] SMP CPU: 1 PID: 1290 Comm: Xorg Not tainted 4.2.0-rc1-00201-g59c3cb5 #6 Hardware name: FUJITSU LIFEBOOK AH532/FJNBB1C, BIOS Version 1.09 05/22/2012 task: ffff8802149d6c00 ti: ffff880206df4000 task.ti: ffff880206df4000 RIP: 0010:[] [] 0xffffffffbd3447bb RSP: 0018:ffff880206df7b08 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88021578f480 RCX: ffff88021578f4d0 RDX: 0000000000000000 RSI: ffff88021630b000 RDI: ffff880214a68000 RBP: ffff88021630b000 R08: ffff88021578f4e0 R09: ffff88021578f4f0 R10: 0000000000003c18 R11: 00000000fffffff2 R12: ffff880214a68000 R13: ffff88021634e800 R14: 0000000000000000 R15: 0000000000000000 FS: 00007ff3caa60880(0000) GS:ffff88021f280000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000009 CR3: 0000000206e07000 CR4: 00000000001407e0 Stack: ffff880200010000 ffff880200010000 ffff880200000000 ffff880200000001 ffff88021578f500 ffffffffbd2df135 ffff880213f71c00 ffff880214a68000 0000000000000000 ffff880214a70000 0000000000000001 ffff880214a68000 Call Trace: [] ? 0xffffffffbd2df135 [] ? 0xffffffffbd2b6ca8 [] ? 0xffffffffbd33cc7e [] ? 0xffffffffbd343673 [] ? 0xffffffffbd2d0728 [] ? 0xffffffffbd2d088e [] ? 0xffffffffbd2d10c5 [] ? 0xffffffffbd2c6976 [] ? 0xffffffffbd2d0fe0 [] ? 0xffffffffbd0c6a1f [] ? 0xffffffffbd0e79e1 [] ? 0xffffffffbd0e7ed1 [] ? 0xffffffffbd6df557 Code: 48 89 54 24 20 48 8b 54 24 40 48 89 ee 89 0c 24 4c 89 f9 c7 44 24 18 01 00 00 00 89 44 24 08 e8 bc 1f f7 ff 85 c0 41 89 c7 75 67 <41> 80 7e 09 00 74 56 49 8b 84 24 38 02 00 00 c6 85 d0 08 00 00 RIP [] 0xffffffffbd3447bb RSP CR2: 0000000000000009 ---[ end trace dd0931f7f0d43d12 ] ---