Reproduced in a VM. [ 48.361847] BUG: unable to handle kernel paging request at dffff000 [ 48.362522] IP: wp_page_copy+0xa5/0x650 [ 48.362899] *pdpt = 0000000015d85001 *pde = 0000000015f0d067 [ 48.362900] *pte = 0000000000000000 [ 48.363458] [ 48.363974] Oops: 0002 [#1] SMP [ 48.364285] Modules linked in: ppdev input_leds i2c_piix4 joydev serio_raw mac_hid parport_pc parport qemu_fw_cfg ib_iser rdma_cm iw_cm ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi ip_tables x_tables autofs4 btrfs raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear psmouse virtio_blk virtio_net floppy pata_acpi [ 48.367731] CPU: 0 PID: 372 Comm: systemd-udevd Tainted: G W 4.13.0-10-generic #11-Ubuntu [ 48.368608] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1ubuntu1 04/01/2014 [ 48.369503] task: d3dc57c0 task.stack: d392c000 [ 48.369966] EIP: wp_page_copy+0xa5/0x650 [ 48.370361] EFLAGS: 00010282 CPU: 0 [ 48.370714] EAX: dffff000 EBX: d11a4000 ECX: dffff000 EDX: bf991ff0 [ 48.371295] ESI: d11a4000 EDI: dffff004 EBP: d392dea0 ESP: d392de64 [ 48.371890] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 [ 48.372573] CR0: 80050033 CR2: dffff000 CR3: 1ed26e60 CR4: 000006f0 [ 48.375056] Call Trace: [ 48.376155] do_wp_page+0x83/0x4f0 [ 48.377090] ? kmap_atomic_prot+0x3c/0x100 [ 48.377632] handle_mm_fault+0x94b/0xe70 [ 48.377965] __do_page_fault+0x209/0x500 [ 48.378290] ? kvm_async_pf_task_wake+0x100/0x100 [ 48.378679] trace_do_page_fault+0x3f/0xe0 [ 48.379048] ? kvm_async_pf_task_wake+0x100/0x100 [ 48.379424] do_async_page_fault+0x55/0x70 [ 48.379764] common_exception+0x6c/0x72 [ 48.380070] EIP: 0xb7e1c76a [ 48.380296] EFLAGS: 00010286 CPU: 0 [ 48.380574] EAX: bf9927f0 EBX: 01200011 ECX: 00000000 EDX: 00000000 [ 48.381066] ESI: 00000000 EDI: 000003ad EBP: bf992838 ESP: bf9927f0 [ 48.381558] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b [ 48.381985] Code: 00 00 8b 4d e8 85 c9 0f 84 11 05 00 00 8b 45 e8 e8 61 80 ea ff 89 c3 8b 45 e0 89 de e8 55 80 ea ff 8b 13 8d 78 04 89 c1 83 e7 fc <89> 10 8b 93 fc 0f 00 00 29 f9 29 ce 81 c1 00 10 00 00 c1 e9 02 [ 48.383453] EIP: wp_page_copy+0xa5/0x650 SS:ESP: 0068:d392de64 [ 48.383921] CR2: 00000000dffff000 [ 48.384188] ---[ end trace a95cd1e3637ee3ef ]--- [ 48.385163] BUG: unable to handle kernel paging request at dfffeaed [ 48.385680] IP: ext4_block_write_begin+0x435/0x470 [ 48.386062] *pdpt = 0000000015d85001 *pde = 0000000015f0d067 [ 48.386063] *pte = 0000000000000000 [ 48.386516] [ 48.386930] Oops: 0002 [#2] SMP [ 48.387185] Modules linked in: ppdev input_leds i2c_piix4 joydev serio_raw mac_hid parport_pc parport qemu_fw_cfg ib_iser rdma_cm iw_cm ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi ip_tables x_tables autofs4 btrfs raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear psmouse virtio_blk virtio_net floppy pata_acpi [ 48.390027] CPU: 0 PID: 525 Comm: rs:main Q:Reg Tainted: G D W 4.13.0-10-generic #11-Ubuntu [ 48.390759] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1ubuntu1 04/01/2014 [ 48.391462] task: d754f500 task.stack: d7552000 [ 48.391833] EIP: ext4_block_write_begin+0x435/0x470 [ 48.392219] EFLAGS: 00010216 CPU: 0 [ 48.392499] EAX: 00000513 EBX: 000000e5 ECX: dfffeaed EDX: de637000 [ 48.392992] ESI: 00000000 EDI: dfffeaf1 EBP: d7553d9c ESP: d7553d4c [ 48.393487] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 [ 48.393915] CR0: 80050033 CR2: dfffeaed CR3: 1423c860 CR4: 000006f0 [ 48.394412] Call Trace: [ 48.394614] ? ext4_inode_attach_jinode.part.63+0x90/0x90 [ 48.395044] ext4_da_write_begin+0x13b/0x380 [ 48.395388] ? ext4_inode_attach_jinode.part.63+0x90/0x90 [ 48.395882] generic_perform_write+0x95/0x180 [ 48.396410] __generic_file_write_iter+0x183/0x1b0 [ 48.396878] ext4_file_write_iter+0x2f0/0x4b0 [ 48.397307] new_sync_write+0xcb/0x130 [ 48.397737] ? ext4_llseek+0x500/0x500 [ 48.398237] __vfs_write+0x37/0x50 [ 48.398691] vfs_write+0x94/0x1a0 [ 48.399134] SyS_write+0x47/0xb0 [ 48.399571] do_fast_syscall_32+0x71/0x150 [ 48.400152] entry_SYSENTER_32+0x4e/0x7c [ 48.400684] EIP: 0xb7f11cf9 [ 48.401060] EFLAGS: 00000293 CPU: 0 [ 48.401546] EAX: ffffffda EBX: 00000005 ECX: b61059b0 EDX: 00000e39 [ 48.402435] ESI: b61059b0 EDI: 00000e39 EBP: b6105800 ESP: b6c25b14 [ 48.403240] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b [ 48.404266] Code: 72 a5 f9 ff e9 0b fe ff ff 90 8d 74 26 00 0f 0b 8d b6 00 00 00 00 0f 0b 8d b6 00 00 00 00 0f 0b 8d b6 00 00 00 00 0f 0b 8d 79 04 01 00 00 00 00 c7 44 01 fc 00 00 00 00 83 e7 fc 29 f9 01 c1 [ 48.408331] EIP: ext4_block_write_begin+0x435/0x470 SS:ESP: 0068:d7553d4c [ 48.409282] CR2: 00000000dfffeaed [ 48.409793] ---[ end trace a95cd1e3637ee3f0 ]--- [ 48.416425] BUG: unable to handle kernel paging request at dfffd000 [ 48.417338] IP: wp_page_copy+0xa5/0x650 [ 48.417735] *pdpt = 0000000015d85001 *pde = 0000000015f0d067 [ 48.417737] *pte = 0000000000000000 [ 48.418547] [ 48.419232] Oops: 0002 [#3] SMP [ 48.419733] Modules linked in: ppdev input_leds i2c_piix4 joydev serio_raw mac_hid parport_pc parport qemu_fw_cfg ib_iser rdma_cm iw_cm ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi ip_tables x_tables autofs4 btrfs raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear psmouse virtio_blk virtio_net floppy pata_acpi [ 48.424605] CPU: 0 PID: 941 Comm: systemd-udevd Tainted: G D W 4.13.0-10-generic #11-Ubuntu [ 48.425822] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1ubuntu1 04/01/2014 [ 48.427017] task: d427a700 task.stack: d6eb6000 [ 48.427618] EIP: wp_page_copy+0xa5/0x650 [ 48.428148] EFLAGS: 00010282 CPU: 0 [ 48.428611] EAX: dfffd000 EBX: d0a21000 ECX: dfffd000 EDX: 00000000 [ 48.429464] ESI: d0a21000 EDI: dfffd004 EBP: d6eb7e48 ESP: d6eb7e0c [ 48.430291] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 [ 48.431020] CR0: 80050033 CR2: dfffd000 CR3: 14749500 CR4: 000006f0 [ 48.431720] Call Trace: [ 48.431975] do_wp_page+0x83/0x4f0 [ 48.432372] ? kmap_atomic_prot+0x3c/0x100 [ 48.432769] handle_mm_fault+0x94b/0xe70 [ 48.433171] __do_page_fault+0x209/0x500 [ 48.433552] ? kvm_async_pf_task_wake+0x100/0x100 [ 48.434122] trace_do_page_fault+0x3f/0xe0 [ 48.434661] ? kvm_async_pf_task_wake+0x100/0x100 [ 48.435120] do_async_page_fault+0x55/0x70 [ 48.435544] common_exception+0x6c/0x72 [ 48.435958] EIP: __put_user_4+0x17/0x20 [ 48.436469] EFLAGS: 00010293 CPU: 0 [ 48.436987] EAX: 000003ad EBX: bffffffd ECX: b7c36868 EDX: d7727b00 [ 48.437828] ESI: 00000000 EDI: 00000000 EBP: d6eb7f98 ESP: d6eb7f90 [ 48.438706] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 [ 48.439456] ? schedule_tail+0x42/0x50 [ 48.439967] schedule_tail_wrapper+0x9/0xc [ 48.440512] ret_from_fork+0x5/0x24 [ 48.441004] EIP: 0xb7f4dcf9 [ 48.441364] EFLAGS: 00000246 CPU: 0 [ 48.441842] EAX: 00000000 EBX: 01200011 ECX: 00000000 EDX: 00000000 [ 48.443386] ESI: 00000000 EDI: b7c36868 EBP: bf992838 ESP: bf9927e0 [ 48.444861] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b [ 48.445736] Code: 00 00 8b 4d e8 85 c9 0f 84 11 05 00 00 8b 45 e8 e8 61 80 ea ff 89 c3 8b 45 e0 89 de e8 55 80 ea ff 8b 13 8d 78 04 89 c1 83 e7 fc <89> 10 8b 93 fc 0f 00 00 29 f9 29 ce 81 c1 00 10 00 00 c1 e9 02 [ 48.448685] EIP: wp_page_copy+0xa5/0x650 SS:ESP: 0068:d6eb7e0c [ 48.450225] CR2: 00000000dfffd000 [ 48.451199] ---[ end trace a95cd1e3637ee3f1 ]--- [ 48.504964] BUG: unable to handle kernel paging request at dfffc000 [ 48.505936] IP: wp_page_copy+0xa5/0x650 [ 48.506501] *pdpt = 0000000015d85001 *pde = 0000000015f0d067 [ 48.506504] *pte = 0000000000000000 [ 48.507138] [ 48.507935] Oops: 0002 [#4] SMP [ 48.508414] Modules linked in: ppdev input_leds i2c_piix4 joydev serio_raw mac_hid parport_pc parport qemu_fw_cfg ib_iser rdma_cm iw_cm ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi ip_tables x_tables autofs4 btrfs raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear psmouse virtio_blk virtio_net floppy pata_acpi [ 48.511825] CPU: 0 PID: 942 Comm: systemd-udevd Tainted: G D W 4.13.0-10-generic #11-Ubuntu [ 48.512579] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1ubuntu1 04/01/2014 [ 48.513373] task: defca700 task.stack: d3dfe000 [ 48.513852] EIP: wp_page_copy+0xa5/0x650 [ 48.514234] EFLAGS: 00010282 CPU: 0 [ 48.514582] EAX: dfffc000 EBX: dd86e000 ECX: dfffc000 EDX: 00d19020 [ 48.515287] ESI: dd86e000 EDI: dfffc004 EBP: d3dffea0 ESP: d3dffe64 [ 48.516020] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 [ 48.516614] CR0: 80050033 CR2: dfffc000 CR3: 1f7f0720 CR4: 000006f0 [ 48.517292] Call Trace: [ 48.517499] do_wp_page+0x83/0x4f0 [ 48.517772] ? kmap_atomic_prot+0x3c/0x100 [ 48.518099] handle_mm_fault+0x94b/0xe70 [ 48.518413] __do_page_fault+0x209/0x500 [ 48.518728] ? kvm_async_pf_task_wake+0x100/0x100 [ 48.519103] trace_do_page_fault+0x3f/0xe0 [ 48.519433] ? kvm_async_pf_task_wake+0x100/0x100 [ 48.519871] do_async_page_fault+0x55/0x70 [ 48.521145] common_exception+0x6c/0x72 [ 48.522327] EIP: 0x41f013 [ 48.522649] EFLAGS: 00010202 CPU: 0 [ 48.523723] EAX: 00000001 EBX: 00000000 ECX: 00d19910 EDX: 00000003 [ 48.524855] ESI: 00000000 EDI: 00d1990c EBP: 00000018 ESP: bfebb214 [ 48.525816] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b [ 48.526548] Code: 00 00 8b 4d e8 85 c9 0f 84 11 05 00 00 8b 45 e8 e8 61 80 ea ff 89 c3 8b 45 e0 89 de e8 55 80 ea ff 8b 13 8d 78 04 89 c1 83 e7 fc <89> 10 8b 93 fc 0f 00 00 29 f9 29 ce 81 c1 00 10 00 00 c1 e9 02 [ 48.529009] EIP: wp_page_copy+0xa5/0x650 SS:ESP: 0068:d3dffe64 [ 48.529611] CR2: 00000000dfffc000 [ 48.529959] ---[ end trace a95cd1e3637ee3f2 ]---