Added crash log if directly copying from buff seen with kernel version 4.5.2-1-ARCH

20160425/dmesgCrash.log

+Mai 08 20:02:22 archtux kernel: BUG: unable to handle kernel paging 
+request at 0000000000ba9810
+Mai 08 20:02:22 archtux kernel: IP: [<ffffffffa05d6138>] 
+device_write+0xa8/0xd0 [chardev_1write]
+Mai 08 20:02:22 archtux kernel: PGD 251819067 PUD 251b40067 PMD 
+2518e4067 PTE 800000022be53067
+Mai 08 20:02:22 archtux kernel: Oops: 0001 [#4] PREEMPT SMP 
+Mai 08 20:02:22 archtux kernel: Modules linked in: chardev_1write(PO) 
+ctr ccm fuse snd_hda_codec_hdmi snd_hda_codec_realtek 
+snd_hda_codec_generic joydev mousedev arc4 iwlmvm snd_soc_skl 
+snd_soc_skl_ipc i915 snd_soc_sst_ipc snd_soc_sst_dsp snd_hda_ext_core 
+snd_soc_sst_match snd_soc_core snd_compress mac80211 snd_pcm_dmaengine 
+ac97_bus drm_kms_helper intel_rapl x86_pkg_temp_thermal snd_hda_intel 
+snd_hda_codec intel_powerclamp coretemp snd_hda_core iwlwifi uvcvideo 
+videobuf2_vmalloc videobuf2_memops snd_hwdep kvm_intel evdev drm 
+input_leds snd_pcm videobuf2_v4l2 cfg80211 intel_gtt led_class 
+syscopyarea sysfillrect snd_timer sysimgblt kvm fb_sys_fops snd 
+irqbypass mac_hid mei_me videobuf2_core pcspkr i2c_algo_bit shpchp 
+soundcore mei serio_raw psmouse videodev btusb hci_uart btrtl btbcm 
+btqca btintel media i2c_i801 thermal
+Mai 08 20:02:22 archtux kernel:  bluetooth battery video 
+pinctrl_sunrisepoint pinctrl_intel rfkill tpm_tis i2c_hid hid 
+intel_lpss_acpi intel_lpss tpm fjes processor acpi_pad button ac 
+sch_fq_codel ip_tables x_tables sha256_ssse3 sha256_generic hmac drbg 
+ansi_cprng algif_skcipher af_alg dm_crypt dm_mod sd_mod atkbd libps2 
+crct10dif_pclmul crc32_pclmul crc32c_intel ahci ghash_clmulni_intel 
+libahci libata xhci_pci aesni_intel xhci_hcd aes_x86_64 lrw gf128mul 
+glue_helper ablk_helper cryptd usbcore scsi_mod usb_common i8042 serio 
+ext4 crc16 mbcache jbd2 [last unloaded: chardev_1write]
+Mai 08 20:02:22 archtux kernel: CPU: 2 PID: 3447 Comm: bash Tainted: P      
+D    O    4.5.2-1-ARCH #1
+Mai 08 20:02:22 archtux kernel: Hardware name: Intel Corporation Skylake 
+Platform/U931, BIOS 5.11 04/08/2016
+Mai 08 20:02:22 archtux kernel: task: ffff8802671b0000 ti: 
+ffff8802597e0000 task.ti: ffff8802597e0000
+Mai 08 20:02:22 archtux kernel: RIP: 0010:[<ffffffffa05d6138>]  
+[<ffffffffa05d6138>] device_write+0xa8/0xd0 [chardev_1write]
+Mai 08 20:02:22 archtux kernel: RSP: 0018:ffff8802597e3e10  EFLAGS: 
+00010246
+Mai 08 20:02:22 archtux kernel: RAX: 0000000000000000 RBX: 
+0000000000000005 RCX: ffff8802597e3f18
+Mai 08 20:02:22 archtux kernel: RDX: 0000000000000005 RSI: 
+0000000000ba9810 RDI: ffff880246f4c900
+Mai 08 20:02:22 archtux kernel: RBP: ffff8802597e3e38 R08: 
+0000000000ba9815 R09: 00007ffffffff000
+Mai 08 20:02:22 archtux kernel: R10: 0000000000000004 R11: 
+0000000000000246 R12: 0000000000ba9810
+Mai 08 20:02:22 archtux kernel: R13: 0000000000000000 R14: 
+ffffffffa05d7090 R15: 0000000000000005
+Mai 08 20:02:22 archtux kernel: FS:  00007f1037d52700(0000) 
+GS:ffff880273d00000(0000) knlGS:0000000000000000
+Mai 08 20:02:22 archtux kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 
+0000000080050033
+Mai 08 20:02:22 archtux kernel: CR2: 0000000000ba9810 CR3: 
+0000000268c22000 CR4: 00000000003406e0
+Mai 08 20:02:22 archtux kernel: Stack:
+Mai 08 20:02:22 archtux kernel:  ffff880246f4c900 ffff8802597e3f18 
+0000000000ba9810 ffff8802597e3f18
+Mai 08 20:02:22 archtux kernel:  0000000000000000 ffff8802597e3ec0 
+ffffffff811ecde7 00000000354527a1
+Mai 08 20:02:22 archtux kernel:  00000000354527a1 000000000000000a 
+000000000000000a 0000000000000400
+Mai 08 20:02:22 archtux kernel: Call Trace:
+Mai 08 20:02:22 archtux kernel:  [<ffffffff811ecde7>] 
+__vfs_write+0x37/0x100
+Mai 08 20:02:22 archtux kernel:  [<ffffffff811edc97>] 
+vfs_write+0xa7/0x1a0
+Mai 08 20:02:22 archtux kernel:  [<ffffffff811eebe5>] 
+SyS_write+0x55/0xc0
+Mai 08 20:02:22 archtux kernel:  [<ffffffff8120ab43>] ? 
+__close_fd+0xa3/0xd0
+Mai 08 20:02:22 archtux kernel:  [<ffffffff815b0b6e>] 
+entry_SYSCALL_64_fastpath+0x12/0x6d
+Mai 08 20:02:22 archtux kernel: Code: 04 72 5d a0 48 c7 c7 58 70 5d a0 
+e8 a0 01 b9 e0 48 c7 c0 f4 ff ff ff eb cc 49 89 f4 41 89 d7 31 c0 45 31 
+ed 49 c7 c6 90 70 5d a0 <41> 0f be 34 04 44 89 ea 44 89 f9 41 83 c5 01 
+4c 89 f7 e8 6e 01 
+Mai 08 20:02:22 archtux kernel: RIP  [<ffffffffa05d6138>] 
+device_write+0xa8/0xd0 [chardev_1write]
+Mai 08 20:02:22 archtux kernel:  RSP <ffff8802597e3e10>
+Mai 08 20:02:22 archtux kernel: CR2: 0000000000ba9810
+Mai 08 20:02:22 archtux kernel: ---[ end trace 2e7525e9567b5a55 ]---
+