Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757248AbYLFMDq (ORCPT ); Sat, 6 Dec 2008 07:03:46 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754853AbYLFMDh (ORCPT ); Sat, 6 Dec 2008 07:03:37 -0500 Received: from orion.ambsoft.pl ([212.109.144.130]:58797 "EHLO orion.ambsoft.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752331AbYLFMDa (ORCPT ); Sat, 6 Dec 2008 07:03:30 -0500 From: Mariusz Kozlowski To: Stephen Rothwell , kernel-testers@vger.kernel.org Subject: Re: linux-next: Tree for December 4 Date: Sat, 6 Dec 2008 13:04:12 +0100 User-Agent: KMail/1.9.9 Cc: linux-next@vger.kernel.org, LKML References: <20081204200745.eff0ac87.sfr@canb.auug.org.au> In-Reply-To: <20081204200745.eff0ac87.sfr@canb.auug.org.au> MIME-Version: 1.0 Content-Type: Multipart/Mixed; boundary="Boundary-00=_8omOJh8gxsVLPqn" Message-Id: <200812061304.12216.m.kozlowski@tuxland.pl> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 87005 Lines: 1412 --Boundary-00=_8omOJh8gxsVLPqn Content-Type: text/plain; charset="iso-8859-2" Content-Transfer-Encoding: 7bit Content-Disposition: inline Hello Stephen, I didn't run linux-next for some time. Today I gave it a shot and a few interesting things poped out: Linux agpgart interface v0.103 Serial: 8250/16550 driver4 ports, IRQ sharing enabled serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A serial8250: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A ============================================================================= BUG kmalloc-4096: Invalid object pointer 0xffff88007fb20010 ----------------------------------------------------------------------------- INFO: Slab 0xffffe20001beef00 objects=7 used=1 fp=0xffff88007fb21048 flags=0x40000000000020c3 Pid: 1, comm: swapper Not tainted 2.6.28-rc7-next-20081204 #1 Call Trace: [] slab_err+0x9d/0xc0 [] save_stack_trace+0x22/0x40 [] save_trace+0x37/0xa0 [] add_lock_to_list+0x67/0xf0 [] __release_region+0x22/0xc0 [] validate_chain+0xcdc/0x1200 [] check_bytes_and_report+0x4b/0x100 [] slab_pad_check+0xe7/0x170 [] uart_remove_one_port+0xf0/0x120 [] __slab_free+0x258/0x380 [] uart_remove_one_port+0xf0/0x120 [] kfree+0xb2/0x150 [] uart_remove_one_port+0xf0/0x120 [] serial8250_register_port+0x88/0x1f0 [] serial_pnp_probe+0x1a0/0x220 [] match_device+0x2f/0x50 [] pnp_device_probe+0x64/0xe0 [] driver_probe_device+0x96/0x1b0 [] __driver_attach+0x9c/0xa0 [] __driver_attach+0x0/0xa0 [] bus_for_each_dev+0x53/0x80 [] bus_add_driver+0x1cb/0x230 [] driver_register+0x55/0x140 [] serial8250_pnp_init+0x0/0x10 [] _stext+0x3b/0x170 [] register_irq_proc+0xc1/0xe0 [] kernel_init+0x15d/0x1f0 [] child_rip+0xa/0x20 [] restore_args+0x0/0x30 [] kernel_init+0x0/0x1f0 [] child_rip+0x0/0x20 FIX kmalloc-4096: Object at 0xffff88007fb20010 not freed 00:06: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A ============================================================================= BUG kmalloc-4096: Invalid object pointer 0xffff88007fb20278 ----------------------------------------------------------------------------- INFO: Slab 0xffffe20001beef00 objects=7 used=1 fp=0xffff88007fb21048 flags=0x40000000000020c3 Pid: 1, comm: swapper Not tainted 2.6.28-rc7-next-20081204 #1 Call Trace: [] slab_err+0x9d/0xc0 [] validate_chain+0x460/0x1200 [] validate_chain+0x460/0x1200 [] check_bytes_and_report+0x4b/0x100 [] slab_pad_check+0xe7/0x170 [] uart_remove_one_port+0xf0/0x120 [] __slab_free+0x258/0x380 [] uart_remove_one_port+0xf0/0x120 [] kfree+0xb2/0x150 [] uart_remove_one_port+0xf0/0x120 [] serial8250_register_port+0x88/0x1f0 [] serial_pnp_probe+0x1a0/0x220 [] match_device+0x2f/0x50 [] pnp_device_probe+0x64/0xe0 [] driver_probe_device+0x96/0x1b0 [] __driver_attach+0x9c/0xa0 [] __driver_attach+0x0/0xa0 [] bus_for_each_dev+0x53/0x80 [] bus_add_driver+0x1cb/0x230 [] driver_register+0x55/0x140 [] serial8250_pnp_init+0x0/0x10 [] _stext+0x3b/0x170 [] register_irq_proc+0xc1/0xe0 [] kernel_init+0x15d/0x1f0 [] child_rip+0xa/0x20 [] restore_args+0x0/0x30 [] kernel_init+0x0/0x1f0 [] child_rip+0x0/0x20 FIX kmalloc-4096: Object at 0xffff88007fb20278 not freed 00:07: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A I also noticed my network wasn't reachable. That's probably not related to the kernel but to check if my link is ok I run mii-tool and the result is NULL pointer dereference: BUG: unable to handle kernel NULL pointer dereference at 0000000000000138 IP: [] dev_ifsioc+0x1f/0x320 PGD 736e3067 PUD 736ca067 PMD 0 Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC last sysfs file: /sys/devices/pci0000:00/0000:00:1e.0/0000:05:01.0/resource CPU 1 Modules linked in: nfsd lockd sunrpc exportfs snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss usbhid gspca_zc3xx gspca_main compat_ioctl32 videodev v4l1_compat snd_mixer_oss usb_storage libusual ehci_hcd uhci_hcd usbcore parport_pc snd_hda_codec_realtek thermal parport snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_timer i2c_i801 snd soundcore snd_page_alloc sr_mod pcspkr sg i2c_core intel_agp processor rtc button cdrom Pid: 4768, comm: mii-tool Not tainted 2.6.28-rc7-next-20081204 #1 RIP: 0010:[] [] dev_ifsioc+0x1f/0x320 RSP: 0018:ffff88006e623da8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000008947 RCX: 00000000019369c2 RDX: 0000000000000610 RSI: ffff88006e623e0c RDI: 00000000ffffffff RBP: ffff88006e623e08 R08: 00000000019369c2 R09: 0000000000000001 R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: ffffffff80d7da40 R15: 00007fff55e4ee88 FS: 00007f944de2f6f0(0000) GS:ffff88007f8047d0(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 0000000000000138 CR3: 000000006e4d9000 CR4: 00000000000006e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process mii-tool (pid: 4768, threadinfo ffff88006e622000, task ffff88006e45ba80) Stack: 0000000000008947 ffff88006e623e08 0000000000603400 ffffffff8042c4c7 ffffe2000003f428 0000000000603400 0000000001213025 ffffffff8028e3fd ffff88007d4f5500 00007f944db51330 ffff880076fbb180 0000000000000096 Call Trace: [] ? dev_ioctl+0x2c7/0x590 [] ? __do_fault+0x1dd/0x4a0 [] ? sock_ioctl+0x72/0x250 [] ? vfs_ioctl+0x2f/0xa0 [] ? do_vfs_ioctl+0x7d/0x4c0 [] ? lockdep_sys_exit_thunk+0x35/0x67 [] ? sys_ioctl+0x49/0x80 [] ? system_call_fastpath+0x16/0x1b Code: f8 bd f1 ff e9 52 fe ff ff 0f 1f 00 48 83 ec 18 48 89 1c 24 89 d3 48 89 6c 24 08 4c 89 64 24 10 48 89 f5 e8 f4 d4 ff ff 49 89 c4 <48> 8b 88 38 01 00 00 8d 83 ec 76 ff ff 83 f8 5d 77 0f 89 c0 ff RIP [] dev_ifsioc+0x1f/0x320 RSP CR2: 0000000000000138 ---[ end trace 787e122ecd30f760 ]--- Full dmesg and .config is attached. Mariusz Right before this there was also a rather long lockdep info triggered by starting skype: ====================================================== [ INFO: soft-safe -> soft-unsafe lock order detected ] 2.6.28-rc7-next-20081204 #1 ------------------------------------------------------ skype/4695 [HC0[0]:SC0[1]:HE1:SE0] is trying to acquire: (&fbc->lock){--..}, at: [] __percpu_counter_add+0x5e/0xd0 and this task is already holding: (slock-AF_INET){-+..}, at: [] tcp_close+0x166/0x4a0 which would create a new lock dependency: (slock-AF_INET){-+..} -> (&fbc->lock){--..} but this new dependency connects a soft-irq-safe lock: (slock-AF_INET){-+..} ... which became soft-irq-safe at: [] 0xffffffffffffffff to a soft-irq-unsafe lock: (&fbc->lock){--..} ... which became soft-irq-unsafe at: ... [] __lock_acquire+0x82d/0xa50 [] lock_acquire+0x53/0x70 [] __percpu_counter_add+0x5e/0xd0 [] _spin_lock+0x33/0x40 [] __percpu_counter_add+0x5e/0xd0 [] kmem_cache_alloc+0xd1/0xe0 [] __percpu_counter_add+0x5e/0xd0 [] get_empty_filp+0x68/0x140 [] path_lookup_open+0x3b/0xd0 [] open_exec+0x24/0xd0 [] vfs_read+0x12a/0x160 [] kernel_read+0x38/0x50 [] load_elf_binary+0x18b9/0x1d20 [] generic_file_aio_read+0x4ff/0x5e0 [] validate_chain+0x460/0x1200 [] validate_chain+0x460/0x1200 [] __lock_acquire+0x447/0xa50 [] load_elf_binary+0x0/0x1e70 [] load_elf_binary+0x0/0x1d20 [] search_binary_handler+0xd0/0x2e0 [] load_script+0x270/0x280 [] load_elf_binary+0x0/0x1d20 [] load_script+0x0/0x280 [] search_binary_handler+0xd0/0x2e0 [] do_execve+0x22e/0x290 [] sys_execve+0x49/0x80 [] stub_execve+0x6a/0xc0 [] 0xffffffffffffffff other info that might help us debug this: 1 lock held by skype/4695: #0: (slock-AF_INET){-+..}, at: [] tcp_close+0x166/0x4a0 the soft-irq-safe lock's dependencies: -> (slock-AF_INET){-+..} ops: 0 { initial-use at: [] __lock_acquire+0x1bd/0xa50 [] lock_acquire+0x53/0x70 [] lock_sock_nested+0x1e/0x110 [] _spin_lock_bh+0x38/0x50 [] lock_sock_nested+0x1e/0x110 [] lock_sock_nested+0x1e/0x110 [] validate_chain+0x460/0x1200 [] validate_chain+0x460/0x1200 [] udp_destroy_sock+0xb/0x20 [] sk_common_release+0x18/0x80 [] inet_release+0x3e/0x70 [] sock_release+0x19/0xb0 [] sock_close+0x12/0x40 [] __fput+0xbb/0x200 [] filp_close+0x54/0x90 [] sys_close+0x9f/0x110 [] system_call_fastpath+0x16/0x1b [] 0xffffffffffffffff in-softirq-W at: [] 0xffffffffffffffff hardirq-on-W at: [] __lock_acquire+0x805/0xa50 [] lock_acquire+0x53/0x70 [] lock_sock_nested+0x1e/0x110 [] _spin_lock_bh+0x38/0x50 [] lock_sock_nested+0x1e/0x110 [] lock_sock_nested+0x1e/0x110 [] validate_chain+0x460/0x1200 [] validate_chain+0x460/0x1200 [] udp_destroy_sock+0xb/0x20 [] sk_common_release+0x18/0x80 [] inet_release+0x3e/0x70 [] sock_release+0x19/0xb0 [] sock_close+0x12/0x40 [] __fput+0xbb/0x200 [] filp_close+0x54/0x90 [] sys_close+0x9f/0x110 [] system_call_fastpath+0x16/0x1b [] 0xffffffffffffffff } ... key at: [] af_family_slock_keys+0x10/0x120 -> (&rt_hash_locks[i]){-+..} ops: 0 { initial-use at: [] 0xffffffffffffffff in-softirq-W at: [] 0xffffffffffffffff hardirq-on-W at: [] 0xffffffffffffffff } ... key at: [] __key.40927+0x0/0x8 -> (&zone->lock){.+..} ops: 0 { initial-use at: [] __lock_acquire+0x1bd/0xa50 [] lock_acquire+0x53/0x70 [] free_pages_bulk+0x36/0x300 [] _spin_lock+0x33/0x40 [] free_pages_bulk+0x36/0x300 [] free_pages_bulk+0x36/0x300 [] free_hot_cold_page+0x262/0x2f0 [] free_all_bootmem_core+0xd8/0x240 [] _etext+0x0/0x3 [] mem_init+0x3c/0x190 [] start_kernel+0x28f/0x440 [] x86_64_start_kernel+0xca/0xe0 [] 0xffffffffffffffff in-softirq-W at: [] 0xffffffffffffffff } ... key at: [] __key.29131+0x0/0x8 ... acquired at: [] get_page_from_freelist+0x525/0x5b0 [] validate_chain+0xc05/0x1200 [] __lock_acquire+0x447/0xa50 [] lock_acquire+0x53/0x70 [] get_page_from_freelist+0x525/0x5b0 [] _spin_lock_irqsave+0x3e/0x60 [] get_page_from_freelist+0x525/0x5b0 [] get_page_from_freelist+0x525/0x5b0 [] __alloc_pages_internal+0xaa/0x450 [] __slab_alloc+0x17a/0x670 [] neigh_create+0x74/0x5b0 [] neigh_create+0x74/0x5b0 [] kmem_cache_alloc+0xbf/0xe0 [] neigh_create+0x74/0x5b0 [] trace_hardirqs_on_caller+0x71/0x180 [] local_bh_enable_ip+0x81/0xf0 [] neigh_lookup+0x10a/0x140 [] arp_bind_neighbour+0xa1/0xb0 [] rt_intern_hash+0x208/0x4f0 [] __rcu_read_unlock+0xcd/0xe0 [] __ip_route_output_key+0x413/0xa60 [] ip4_datagram_connect+0x177/0x2a0 [] local_bh_enable_ip+0x81/0xf0 [] sys_connect+0x86/0xe0 [] retint_swapgs+0xe/0x13 [] trace_hardirqs_on_caller+0x11e/0x180 [] trace_hardirqs_on_thunk+0x3a/0x3f [] system_call_fastpath+0x16/0x1b [] 0xffffffffffffffff ... acquired at: [] 0xffffffffffffffff -> (rt_peer_lock){-+..} ops: 0 { initial-use at: [] 0xffffffffffffffff in-softirq-W at: [] 0xffffffffffffffff hardirq-on-W at: [] 0xffffffffffffffff } ... key at: [] rt_peer_lock.41771+0x18/0x40 ... acquired at: [] 0xffffffffffffffff -> (inet_peer_idlock){-+..} ops: 0 { initial-use at: [] 0xffffffffffffffff in-softirq-W at: [] 0xffffffffffffffff hardirq-on-W at: [] 0xffffffffffffffff } ... key at: [] inet_peer_idlock+0x18/0x40 ... acquired at: [] 0xffffffffffffffff -> (&n->lock){-+-+} ops: 0 { initial-use at: [] __lock_acquire+0x1bd/0xa50 [] lock_acquire+0x53/0x70 [] __neigh_event_send+0x2a/0x200 [] _write_lock_bh+0x38/0x50 [] __neigh_event_send+0x2a/0x200 [] __neigh_event_send+0x2a/0x200 [] neigh_resolve_output+0x147/0x2d0 [] ip_generic_getfrag+0x4d/0x90 [] ip_push_pending_frames+0x27c/0x400 [] udp_push_pending_frames+0x233/0x3c0 [] udp_sendmsg+0x361/0x730 [] local_bh_enable_ip+0x81/0xf0 [] local_bh_enable_ip+0x81/0xf0 [] neigh_lookup+0x10a/0x140 [] sock_sendmsg+0xcb/0x100 [] trace_hardirqs_on_caller+0x11e/0x180 [] __lock_acquire+0x447/0xa50 [] autoremove_wake_function+0x0/0x30 [] __do_fault+0x1dd/0x4a0 [] validate_chain+0x460/0x1200 [] sockfd_lookup_light+0x41/0x80 [] sys_sendto+0x119/0x180 [] __lock_acquire+0x447/0xa50 [] udp_poll+0x0/0x120 [] system_call_fastpath+0x16/0x1b [] 0xffffffffffffffff in-softirq-W at: [] 0xffffffffffffffff hardirq-on-W at: [] __lock_acquire+0x805/0xa50 [] lock_acquire+0x53/0x70 [] __neigh_event_send+0x2a/0x200 [] _write_lock_bh+0x38/0x50 [] __neigh_event_send+0x2a/0x200 [] __neigh_event_send+0x2a/0x200 [] neigh_resolve_output+0x147/0x2d0 [] ip_generic_getfrag+0x4d/0x90 [] ip_push_pending_frames+0x27c/0x400 [] udp_push_pending_frames+0x233/0x3c0 [] udp_sendmsg+0x361/0x730 [] local_bh_enable_ip+0x81/0xf0 [] local_bh_enable_ip+0x81/0xf0 [] neigh_lookup+0x10a/0x140 [] sock_sendmsg+0xcb/0x100 [] trace_hardirqs_on_caller+0x11e/0x180 [] __lock_acquire+0x447/0xa50 [] autoremove_wake_function+0x0/0x30 [] __do_fault+0x1dd/0x4a0 [] validate_chain+0x460/0x1200 [] sockfd_lookup_light+0x41/0x80 [] sys_sendto+0x119/0x180 [] __lock_acquire+0x447/0xa50 [] udp_poll+0x0/0x120 [] system_call_fastpath+0x16/0x1b [] 0xffffffffffffffff in-softirq-R at: [] 0xffffffffffffffff hardirq-on-R at: [] 0xffffffffffffffff } ... key at: [] __key.31965+0x0/0xc -> (&base->lock){++..} ops: 0 { initial-use at: [] __lock_acquire+0x1bd/0xa50 [] lock_acquire+0x53/0x70 [] lock_timer_base+0x34/0x70 [] _spin_lock_irqsave+0x3e/0x60 [] lock_timer_base+0x34/0x70 [] lock_timer_base+0x34/0x70 [] _spin_unlock_irqrestore+0x65/0x80 [] __mod_timer+0x2a/0xe0 [] _spin_unlock_irqrestore+0x40/0x80 [] con_init+0x274/0x2a0 [] console_init+0x1a/0x30 [] start_kernel+0x265/0x440 [] x86_64_start_kernel+0xca/0xe0 [] 0xffffffffffffffff in-hardirq-W at: [] 0xffffffffffffffff in-softirq-W at: [] 0xffffffffffffffff } ... key at: [] __key.21559+0x0/0x8 ... acquired at: [] lock_timer_base+0x34/0x70 [] validate_chain+0xc05/0x1200 [] __lock_acquire+0x447/0xa50 [] lock_acquire+0x53/0x70 [] lock_timer_base+0x34/0x70 [] _spin_lock_irqsave+0x3e/0x60 [] lock_timer_base+0x34/0x70 [] lock_timer_base+0x34/0x70 [] __mod_timer+0x2a/0xe0 [] neigh_add_timer+0x17/0x40 [] __neigh_event_send+0xd3/0x200 [] neigh_resolve_output+0x147/0x2d0 [] ip_generic_getfrag+0x4d/0x90 [] ip_push_pending_frames+0x27c/0x400 [] udp_push_pending_frames+0x233/0x3c0 [] udp_sendmsg+0x361/0x730 [] local_bh_enable_ip+0x81/0xf0 [] local_bh_enable_ip+0x81/0xf0 [] neigh_lookup+0x10a/0x140 [] sock_sendmsg+0xcb/0x100 [] trace_hardirqs_on_caller+0x11e/0x180 [] __lock_acquire+0x447/0xa50 [] autoremove_wake_function+0x0/0x30 [] __do_fault+0x1dd/0x4a0 [] validate_chain+0x460/0x1200 [] sockfd_lookup_light+0x41/0x80 [] sys_sendto+0x119/0x180 [] __lock_acquire+0x447/0xa50 [] udp_poll+0x0/0x120 [] system_call_fastpath+0x16/0x1b [] 0xffffffffffffffff -> (&list->lock#3){.+..} ops: 0 { initial-use at: [] 0xffffffffffffffff in-softirq-W at: [] 0xffffffffffffffff } ... key at: [] __key.17594+0x0/0x8 ... acquired at: [] 0xffffffffffffffff ... acquired at: [] 0xffffffffffffffff -> (&list->lock){-+..} ops: 0 { initial-use at: [] __lock_acquire+0x1bd/0xa50 [] lock_acquire+0x53/0x70 [] skb_queue_tail+0x24/0x60 [] _spin_lock_irqsave+0x3e/0x60 [] skb_queue_tail+0x24/0x60 [] skb_queue_tail+0x24/0x60 [] netlink_broadcast+0x2cd/0x3c0 [] kobject_uevent_env+0x336/0x3f0 [] kobject_action_type+0x5f/0xb0 [] bus_uevent_store+0x39/0x50 [] sysfs_write_file+0xcc/0x150 [] vfs_write+0xc8/0x170 [] sys_write+0x53/0x90 [] system_call_fastpath+0x16/0x1b [] 0xffffffffffffffff in-softirq-W at: [] 0xffffffffffffffff hardirq-on-W at: [] __lock_acquire+0x805/0xa50 [] lock_acquire+0x53/0x70 [] udp_poll+0x54/0x120 [] _spin_lock_bh+0x38/0x50 [] udp_poll+0x54/0x120 [] udp_poll+0x54/0x120 [] do_sys_poll+0x1e2/0x3d0 [] __pollwait+0x0/0x130 [] default_wake_function+0x0/0x10 [] default_wake_function+0x0/0x10 [] __lock_acquire+0x447/0xa50 [] mark_held_locks+0x42/0x90 [] validate_chain+0x460/0x1200 [] __rcu_read_unlock+0xcd/0xe0 [] trace_hardirqs_on_caller+0x11e/0x180 [] __lock_acquire+0x447/0xa50 [] __do_fault+0x1dd/0x4a0 [] __lock_acquire+0x447/0xa50 [] retint_swapgs+0xe/0x13 [] sys_poll+0x73/0xf0 [] system_call_fastpath+0x16/0x1b [] 0xffffffffffffffff } ... key at: [] __key.24456+0x0/0x8 ... acquired at: [] 0xffffffffffffffff -> (&q->lock){++..} ops: 0 { initial-use at: [] __lock_acquire+0x1bd/0xa50 [] lock_acquire+0x53/0x70 [] wait_for_common+0x37/0x190 [] _spin_lock_irq+0x39/0x50 [] wait_for_common+0x37/0x190 [] trace_hardirqs_on_caller+0x11e/0x180 [] wait_for_common+0x37/0x190 [] _spin_unlock_irqrestore+0x40/0x80 [] try_to_wake_up+0x107/0x1f0 [] kthread_create+0x9a/0x110 [] migration_thread+0x0/0x290 [] validate_chain+0x460/0x1200 [] __lock_acquire+0x447/0xa50 [] init_pit_timer+0x1f/0xc0 [] mark_held_locks+0x42/0x90 [] _spin_unlock_irqrestore+0x65/0x80 [] migration_init+0x0/0x60 [] migration_call+0x244/0x580 [] _spin_unlock_irqrestore+0x40/0x80 [] migration_init+0x0/0x60 [] migration_init+0x21/0x60 [] migration_init+0x0/0x60 [] _stext+0x3b/0x170 [] _spin_unlock+0x29/0x50 [] get_apic_id+0x0/0x10 [] native_smp_prepare_cpus+0x1ab/0x460 [] kernel_init+0x70/0x1f0 [] child_rip+0xa/0x20 [] restore_args+0x0/0x30 [] kernel_init+0x0/0x1f0 [] child_rip+0x0/0x20 [] 0xffffffffffffffff in-hardirq-W at: [] 0xffffffffffffffff in-softirq-W at: [] 0xffffffffffffffff } ... key at: [] __key.16756+0x0/0x8 -> (&rq->lock){++..} ops: 0 { initial-use at: [] __lock_acquire+0x1bd/0xa50 [] lock_acquire+0x53/0x70 [] rq_attach_root+0x23/0xe0 [] _spin_lock_irqsave+0x3e/0x60 [] rq_attach_root+0x23/0xe0 [] rq_attach_root+0x23/0xe0 [] sched_init+0x375/0x510 [