Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753855AbbKQNkz (ORCPT ); Tue, 17 Nov 2015 08:40:55 -0500 Received: from aserp1040.oracle.com ([141.146.126.69]:22277 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751841AbbKQNkv (ORCPT ); Tue, 17 Nov 2015 08:40:51 -0500 Subject: Re: kernel 4.4-rc1 BUG when booting as Xen dom0 To: Juergen Gross , "xen-devel@lists.xen.org" , Linux Kernel Mailing List , David Vrabel , Konrad Rzeszutek Wilk References: <564B2DDB.1070700@suse.com> From: Boris Ostrovsky Message-ID: <564B2E5A.1060701@oracle.com> Date: Tue, 17 Nov 2015 08:40:42 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.1.0 MIME-Version: 1.0 In-Reply-To: <564B2DDB.1070700@suse.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-Source-IP: aserv0021.oracle.com [141.146.126.233] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4473 Lines: 99 On 11/17/2015 08:38 AM, Juergen Gross wrote: > Trying to boot a 4.4 kernel as Xen dom0 crashes the system: > > [ 9.949589] ACPI: Added _OSI(Module Device) > [ 9.957803] ACPI: Added _OSI(Processor Device) > [ 9.966814] ACPI: Added _OSI(3.0 _SCP Extensions) > [ 9.976346] ACPI: Added _OSI(Processor Aggregator Device) > [ 9.988715] BUG: unable to handle kernel NULL pointer dereference at > (null) > [ 10.004212] IP: [] xen_irq_init+0x22/0xe0 > [ 10.015468] PGD 0 > [ 10.019622] Oops: 0002 [#1] SMP > [ 10.026217] Modules linked in: > [ 10.032446] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.4.0-rc1-pv+ #490 > [ 10.045974] Hardware name: Dell Inc. Latitude E6440/0159N7, BIOS A07 > 06/26/2014 > [ 10.060718] task: ffff8801fa570d40 ti: ffff8801fa574000 task.ti: > ffff8801fa574000 > [ 10.075798] RIP: e030:[] [] > xen_irq_init+0x22/0xe0 > [ 10.091910] RSP: e02b:ffff8801fa577d38 EFLAGS: 00010246 > [ 10.102646] RAX: 0000000000000000 RBX: 0000000000000009 RCX: > 0000000000000000 > [ 10.117089] RDX: 0000000000000001 RSI: 00000000024080c0 RDI: > ffff8801fb000df0 > [ 10.131437] RBP: 0000000000000009 R08: 0000000000000001 R09: > ffff8801fb000d88 > [ 10.145824] R10: ffff8801fb000df8 R11: 0000000000000000 R12: > 0000000000000009 > [ 10.160205] R13: ffffffff817736e5 R14: 0000000000000009 R15: > 0000000000000000 > [ 10.174592] FS: 0000000000000000(0000) GS:ffff8801ff800000(0000) > knlGS:0000000000000000 > [ 10.190895] CS: e033 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 10.202492] CR2: 0000000000000000 CR3: 000000000180c000 CR4: > 0000000000042660 > [ 10.216878] Stack: > [ 10.221029] 0000000000000009 0000000000000001 ffffffff8135dd9f > 0000000000000000 > [ 10.235931] ffff8801fa577dd0 0000000000000009 0000000000000000 > 0000000000000001 > [ 10.250836] ffffffff81932e2e 0000000000000000 0000000000000000 > ffffffff81415c53 > [ 10.265740] Call Trace: > [ 10.270774] [] ? xen_bind_pirq_gsi_to_irq+0x7f/0x240 > [ 10.284122] [] ? acpi_sleep_proc_init+0x22/0x22 > [ 10.296601] [] ? > xen_register_pirq.constprop.9+0x83/0xd0 > [ 10.310640] [] ? acpi_register_gsi_xen+0x48/0xc0 > [ 10.323292] [] ? acpi_get_override_irq+0xa6/0x120 > [ 10.336117] [] ? acpi_ev_sci_dispatch+0x53/0x53 > [ 10.348595] [] ? acpi_sleep_proc_init+0x22/0x22 > [ 10.361071] [] ? acpi_gsi_to_irq+0x59/0x70 > [ 10.372683] [] ? > acpi_os_install_interrupt_handler+0x44/0xbf > [ 10.387427] [] ? > acpi_ev_install_xrupt_handlers+0x12/0x5f > [ 10.401627] [] ? acpi_init+0x71/0x289 > [ 10.412368] [] ? acpi_sleep_proc_init+0x22/0x22 > [ 10.424849] [] ? do_one_initcall+0xa1/0x1d0 > [ 10.436633] [] ? parse_args+0x270/0x460 > [ 10.447724] [] ? kernel_init_freeable+0x169/0x1f3 > [ 10.460551] [] ? initcall_blacklist+0xb2/0xb2 > [ 10.472681] [] ? rest_init+0x80/0x80 > [ 10.483251] [] ? kernel_init+0x5/0xe0 > [ 10.493996] [] ? ret_from_fork+0x3f/0x70 > [ 10.505263] [] ? rest_init+0x80/0x80 > [ 10.515832] Code: fe ff ff 66 0f 1f 44 00 00 55 89 fd 53 e8 c7 f5 d5 > ff 48 85 c0 74 08 48 8b 40 10 48 83 c0 18 48 8b 15 33 d9 2a 00 be c0 80 > 40 02 <48> 89 10 48 8b 15 2c d9 2a 00 48 89 50 08 48 8b 15 29 d9 2a 00 > [ 10.553606] RIP [] xen_irq_init+0x22/0xe0 > [ 10.565051] RSP > [ 10.572157] CR2: 0000000000000000 > > irq_get_affinity_mask(irq) in xen_irq_init() is returning NULL: > > static void xen_irq_init(unsigned irq) > { > struct irq_info *info; > #ifdef CONFIG_SMP > /* By default all event channels notify CPU#0. */ > cpumask_copy(irq_get_affinity_mask(irq), cpumask_of(0)); > #endif > > Is this already known? Yes: http://lists.xenproject.org/archives/html/xen-devel/2015-11/msg01800.html I will send patch later today. -boris -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/