Dear maintainers, please find below the "kernel BUG" message in syslog .
In order to reboot i had to downgrade to testing (= 4.16.12-1 ) the following packages : linux-headers-4.16.0-2-common linux-image-4.16.0-2-amd64 linux-headers-4.16.0-2-amd64 and to run dpkg-reconfigure nvidia-kernel-dkms So that it seems relatively clear that the problem comes from the nvidia driver, but since the message appears in syslog as a "kernel BUG" i reported the problem to this package. Best, Ara PS, for those stuck without network in debian recovery boot mode, simply run the command 'dhclient' ------------------------------------------ Jun 21 07:22:39 hp-zb-psm kernel: [ 31.283287] usercopy: Kernel memory exposure attempt detected from SLUB object 'nvidia_stack_cache' (offset 11440, size 3)! Jun 21 07:22:39 hp-zb-psm kernel: [ 31.283296] ------------[ cut here ]------------ Jun 21 07:22:39 hp-zb-psm kernel: [ 31.283297] kernel BUG at /build/linux-s0lf2B/linux-4.16.16/mm/usercopy.c:100! Jun 21 07:22:39 hp-zb-psm kernel: [ 31.283303] invalid opcode: 0000 [#1] SMP PTI Jun 21 07:22:39 hp-zb-psm kernel: [ 31.283304] Modules linked in: bnep binfmt_misc fuse intel_rapl x86_pkg_temp_thermal intel_powerclamp kvm_intel kvm btusb irqbypass btrtl btbcm btintel crct10dif_pclmul crc32_pclmul bluetooth ghash_clmulni_intel uvcvideo intel_cstate drbg intel_uncore videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_common snd_hda_codec_hdmi snd_usb_audio snd_usbmidi_lib snd_rawmidi videodev media snd_hda_codec_realtek snd_hda_codec_generic wmi_bmof ansi_cprng hp_wmi intel_rapl_perf ecdh_generic iTCO_wdt iTCO_vendor_support sparse_keymap mxm_wmi snd_seq_device snd_hda_intel snd_hda_codec arc4 snd_hda_core evdev snd_hwdep sg joydev pcspkr snd_pcm iwlmvm mac80211 iwlwifi cfg80211 rfkill rtsx_pci_ms memstick snd_timer snd soundcore tpm_infineon shpchp video lpc_ich ie31200_edac tpm_tis tpm_tis_core mei_me Jun 21 07:22:39 hp-zb-psm kernel: [ 31.283348] mei tpm rng_core hp_accel lis3lv02d input_polldev serio_raw hp_wireless button battery ac wmi nvidia_drm(PO) drm_kms_helper drm nvidia_modeset(PO) nvidia(PO) ipmi_devintf ipmi_msghandler coretemp parport_pc ppdev lp parport ip_tables x_tables autofs4 ext4 crc16 mbcache jbd2 crc32c_generic fscrypto ecb dm_mirror dm_region_hash dm_log dm_mod sd_mod hid_generic usbhid hid rtsx_pci_sdmmc mmc_core ahci libahci crc32c_intel libata aesni_intel aes_x86_64 xhci_pci crypto_simd cryptd glue_helper ehci_pci nvme xhci_hcd ehci_hcd psmouse i2c_i801 scsi_mod rtsx_pci nvme_core usbcore e1000e usb_common thermal Jun 21 07:22:39 hp-zb-psm kernel: [ 31.283391] CPU: 2 PID: 808 Comm: Xorg Tainted: P O 4.16.0-2-amd64 #1 Debian 4.16.16-1 Jun 21 07:22:39 hp-zb-psm kernel: [ 31.283393] Hardware name: Hewlett-Packard HP ZBook 15 G2/2253, BIOS M70 Ver. 01.20 01/26/2018 Jun 21 07:22:39 hp-zb-psm kernel: [ 31.283398] RIP: 0010:usercopy_abort+0x69/0x80 Jun 21 07:22:39 hp-zb-psm kernel: [ 31.283400] RSP: 0018:ffffb203c3cfbb50 EFLAGS: 00010282 Jun 21 07:22:39 hp-zb-psm kernel: [ 31.283402] RAX: 000000000000006f RBX: 0000000000000003 RCX: 0000000000000000 Jun 21 07:22:39 hp-zb-psm kernel: [ 31.283404] RDX: 0000000000000000 RSI: ffff98471dc96738 RDI: ffff98471dc96738 Jun 21 07:22:39 hp-zb-psm kernel: [ 31.283405] RBP: 0000000000000003 R08: 00000000000003b1 R09: 0000000000000004 Jun 21 07:22:39 hp-zb-psm kernel: [ 31.283407] R10: ffffffff97877e48 R11: ffffffff97fa8dcd R12: 0000000000000001 Jun 21 07:22:39 hp-zb-psm kernel: [ 31.283408] R13: ffff9846e1205cb3 R14: 0000000000000000 R15: ffff9846e1205cf8 Jun 21 07:22:39 hp-zb-psm kernel: [ 31.283410] FS: 00007f4fa23496c0(0000) GS:ffff98471dc80000(0000) knlGS:0000000000000000 Jun 21 07:22:39 hp-zb-psm kernel: [ 31.283412] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Jun 21 07:22:39 hp-zb-psm kernel: [ 31.283414] CR2: 00007f4f9a431130 CR3: 0000000865244001 CR4: 00000000001606e0 Jun 21 07:22:39 hp-zb-psm kernel: [ 31.283415] Call Trace: Jun 21 07:22:39 hp-zb-psm kernel: [ 31.283423] __check_heap_object+0xe7/0x120 Jun 21 07:22:39 hp-zb-psm kernel: [ 31.283426] __check_object_size+0x9c/0x1a0 Jun 21 07:22:39 hp-zb-psm kernel: [ 31.283548] os_memcpy_to_user+0x21/0x40 [nvidia] Jun 21 07:22:39 hp-zb-psm kernel: [ 31.283737] _nv009383rm+0xbf/0xe0 [nvidia] Jun 21 07:22:39 hp-zb-psm kernel: [ 31.283892] ? _nv028084rm+0x79/0x90 [nvidia] Jun 21 07:22:39 hp-zb-psm kernel: [ 31.284045] ? _nv028084rm+0x55/0x90 [nvidia] Jun 21 07:22:39 hp-zb-psm kernel: [ 31.284187] ? _nv013694rm+0xee/0x100 [nvidia] Jun 21 07:22:39 hp-zb-psm kernel: [ 31.284328] ? _nv015342rm+0x154/0x270 [nvidia] Jun 21 07:22:39 hp-zb-psm kernel: [ 31.284517] ? _nv008316rm+0x134/0x1a0 [nvidia] Jun 21 07:22:39 hp-zb-psm kernel: [ 31.284706] ? _nv008295rm+0x29c/0x2b0 [nvidia] Jun 21 07:22:39 hp-zb-psm kernel: [ 31.284894] ? _nv001072rm+0xe/0x20 [nvidia] Jun 21 07:22:39 hp-zb-psm kernel: [ 31.285083] ? _nv007322rm+0xd8/0x100 [nvidia] Jun 21 07:22:39 hp-zb-psm kernel: [ 31.285270] ? _nv001171rm+0x627/0x830 [nvidia] Jun 21 07:22:39 hp-zb-psm kernel: [ 31.285458] ? rm_ioctl+0x73/0x100 [nvidia] Jun 21 07:22:39 hp-zb-psm kernel: [ 31.285549] ? nvidia_ioctl+0xb0/0x720 [nvidia] Jun 21 07:22:39 hp-zb-psm kernel: [ 31.285638] ? nvidia_ioctl+0x573/0x720 [nvidia] Jun 21 07:22:39 hp-zb-psm kernel: [ 31.285642] ? kmem_cache_free+0x19c/0x1d0 Jun 21 07:22:39 hp-zb-psm kernel: [ 31.285730] ? nvidia_frontend_unlocked_ioctl+0x3e/0x50 [nvidia] Jun 21 07:22:39 hp-zb-psm kernel: [ 31.285733] ? do_vfs_ioctl+0xa4/0x630 Jun 21 07:22:39 hp-zb-psm kernel: [ 31.285736] ? __fput+0x164/0x1e0 Jun 21 07:22:39 hp-zb-psm kernel: [ 31.285739] ? SyS_ioctl+0x74/0x80 Jun 21 07:22:39 hp-zb-psm kernel: [ 31.285742] ? do_syscall_64+0x6c/0x130 Jun 21 07:22:39 hp-zb-psm kernel: [ 31.285747] ? entry_SYSCALL_64_after_hwframe+0x3d/0xa2 Jun 21 07:22:39 hp-zb-psm kernel: [ 31.285748] Code: 0f 44 d0 53 48 c7 c0 41 de 83 97 51 48 c7 c6 dd d3 82 97 41 53 48 89 f9 48 0f 45 f0 4c 89 d2 48 c7 c7 28 df 83 97 e8 f1 2e ea ff <0f> 0b 49 c7 c1 ac de 84 97 4d 89 cb 4d 89 c8 eb a5 66 0f 1f 44 Jun 21 07:22:39 hp-zb-psm kernel: [ 31.285779] RIP: usercopy_abort+0x69/0x80 RSP: ffffb203c3cfbb50 Jun 21 07:22:39 hp-zb-psm kernel: [ 31.285802] ---[ end trace 9939653c477fa566 ]--- Jun 21 07:22:39 hp-zb-psm kernel: [ 31.286881] general protection fault: 0000 [#2] SMP PTI Jun 21 07:22:39 hp-zb-psm kernel: [ 31.286882] Modules linked in: bnep binfmt_misc fuse intel_rapl x86_pkg_temp_thermal intel_powerclamp kvm_intel kvm btusb irqbypass btrtl btbcm btintel crct10dif_pclmul crc32_pclmul bluetooth ghash_clmulni_intel uvcvideo intel_cstate drbg intel_uncore videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_common snd_hda_codec_hdmi snd_usb_audio snd_usbmidi_lib snd_rawmidi videodev media snd_hda_codec_realtek snd_hda_codec_generic wmi_bmof ansi_cprng hp_wmi intel_rapl_perf ecdh_generic iTCO_wdt iTCO_vendor_support sparse_keymap mxm_wmi snd_seq_device snd_hda_intel snd_hda_codec arc4 snd_hda_core evdev snd_hwdep sg joydev pcspkr snd_pcm iwlmvm mac80211 iwlwifi cfg80211 rfkill rtsx_pci_ms memstick snd_timer snd soundcore tpm_infineon shpchp video lpc_ich ie31200_edac tpm_tis tpm_tis_core mei_me Jun 21 07:22:39 hp-zb-psm kernel: [ 31.286916] mei tpm rng_core hp_accel lis3lv02d input_polldev serio_raw hp_wireless button battery ac wmi nvidia_drm(PO) drm_kms_helper drm nvidia_modeset(PO) nvidia(PO) ipmi_devintf ipmi_msghandler coretemp parport_pc ppdev lp parport ip_tables x_tables autofs4 ext4 crc16 mbcache jbd2 crc32c_generic fscrypto ecb dm_mirror dm_region_hash dm_log dm_mod sd_mod hid_generic usbhid hid rtsx_pci_sdmmc mmc_core ahci libahci crc32c_intel libata aesni_intel aes_x86_64 xhci_pci crypto_simd cryptd glue_helper ehci_pci nvme xhci_hcd ehci_hcd psmouse i2c_i801 scsi_mod rtsx_pci nvme_core usbcore e1000e usb_common thermal Jun 21 07:22:39 hp-zb-psm kernel: [ 31.286948] CPU: 2 PID: 808 Comm: Xorg Tainted: P D O 4.16.0-2-amd64 #1 Debian 4.16.16-1 Jun 21 07:22:39 hp-zb-psm kernel: [ 31.286950] Hardware name: Hewlett-Packard HP ZBook 15 G2/2253, BIOS M70 Ver. 01.20 01/26/2018 Jun 21 07:22:39 hp-zb-psm kernel: [ 31.287144] RIP: 0010:_nv007220rm+0x25/0x90 [nvidia] Jun 21 07:22:39 hp-zb-psm kernel: [ 31.287146] RSP: 0018:ffffb203c3cfbd20 EFLAGS: 00010006 Jun 21 07:22:39 hp-zb-psm kernel: [ 31.287148] RAX: 48e28944ffffff36 RBX: ffffffffc127d238 RCX: ffffb203c3cfbdb0 Jun 21 07:22:39 hp-zb-psm kernel: [ 31.287150] RDX: ffffffffc0620515 RSI: 0000000000000328 RDI: ffffffffc127d238 Jun 21 07:22:39 hp-zb-psm kernel: [ 31.287151] RBP: ffff9846df175ff8 R08: 0000000000000000 R09: ffffb203c3cfbdac Jun 21 07:22:39 hp-zb-psm kernel: [ 31.287153] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000328 Jun 21 07:22:39 hp-zb-psm kernel: [ 31.287154] R13: ffff9846df814000 R14: ffff9846e029dd00 R15: ffff9846f2718800 Jun 21 07:22:39 hp-zb-psm kernel: [ 31.287157] FS: 0000000000000000(0000) GS:ffff98471dc80000(0000) knlGS:0000000000000000 Jun 21 07:22:39 hp-zb-psm kernel: [ 31.287159] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Jun 21 07:22:39 hp-zb-psm kernel: [ 31.287160] CR2: 00007f4f9a431130 CR3: 00000007ede0a003 CR4: 00000000001606e0 Jun 21 07:22:39 hp-zb-psm kernel: [ 31.287162] Call Trace: Jun 21 07:22:39 hp-zb-psm kernel: [ 31.287356] ? _nv025911rm+0x13/0x50 [nvidia] Jun 21 07:22:39 hp-zb-psm kernel: [ 31.287544] ? _nv035641rm+0x144/0x1e0 [nvidia] Jun 21 07:22:39 hp-zb-psm kernel: [ 31.287734] ? rm_free_unused_clients+0x4f/0xe0 [nvidia] Jun 21 07:22:39 hp-zb-psm kernel: [ 31.287823] ? nv_check_pci_config_space+0x285/0x320 [nvidia] Jun 21 07:22:39 hp-zb-psm kernel: [ 31.287914] ? nvidia_close+0xba/0x350 [nvidia] Jun 21 07:22:39 hp-zb-psm kernel: [ 31.288003] ? nvidia_frontend_close+0x2a/0x40 [nvidia] Jun 21 07:22:39 hp-zb-psm kernel: [ 31.288007] ? __fput+0xd0/0x1e0 Jun 21 07:22:39 hp-zb-psm kernel: [ 31.288010] ? task_work_run+0x8a/0xb0 Jun 21 07:22:39 hp-zb-psm kernel: [ 31.288014] ? do_exit+0x2e1/0xb40 Jun 21 07:22:39 hp-zb-psm kernel: [ 31.288017] ? SyS_ioctl+0x74/0x80 Jun 21 07:22:39 hp-zb-psm kernel: [ 31.288020] ? rewind_stack_do_exit+0x17/0x20 Jun 21 07:22:39 hp-zb-psm kernel: [ 31.288022] Code: 84 00 00 00 00 00 31 c9 48 85 ff 53 48 89 fb 74 0d 48 85 d2 74 08 48 63 47 08 48 8d 0c 10 48 8b 03 31 d2 0f 1f 00 48 85 c0 74 11 <48> 39 30 48 89 c2 76 47 48 8b 40 10 48 85 c0 75 ef 48 85 d2 48 Jun 21 07:22:39 hp-zb-psm kernel: [ 31.288245] RIP: _nv007220rm+0x25/0x90 [nvidia] RSP: ffffb203c3cfbd20 Jun 21 07:22:39 hp-zb-psm kernel: [ 31.288247] ---[ end trace 9939653c477fa567 ]--- Jun 21 07:22:39 hp-zb-psm kernel: [ 31.288248] Fixing recursive fault but reboot is needed!