[14318.122209] BUG: unable to handle kernel NULL pointer dereference at 0000000000000088 [14318.122213] IP: [] iommu_no_mapping+0x11/0x120 [14318.122217] PGD 0 [14318.122218] Oops: 0000 [#1] PREEMPT SMP [14318.122220] Modules linked in: vmnet(O) vmblock(O) vsock(O) vmci(O) vmmon(O) bnep ipv6 vboxnetadp(O) vboxnetflt(O) vboxdrv(O) snd_hda_codec_hdmi btusb bluetooth usbhid snd_hda_codec_idt nvidia(PO) snd_hda_intel snd_hda_codec arc4 iwldvm x86_pkg_temp_thermal coretemp snd_pcm mac80211 snd_page_alloc snd_timer kvm_intel snd ehci_pci ehci_hcd dell_wmi sparse_keymap sdhci_pci sdhci mmc_core xhci_hcd dcdbas sr_mod cdrom iwlwifi cfg80211 video soundcore iTCO_wdt kvm freq_table 8250_pci led_class rfkill firewire_ohci firewire_core thermal processor usbcore backlight 8250 thermal_sys wmi serial_core e1000e usb_common hwmon i2c_i801 ptp button battery pcspkr i2c_core pps_core ac [last unloaded: microcode] [14318.122245] CPU: 5 PID: 3246 Comm: chrome Tainted: P O 3.12.14-gentoo #1 [14318.122247] Hardware name: Dell Inc. Precision M4700/082H3V, BIOS A10 08/27/2013 [14318.122248] task: ffff8800bebff1b0 ti: ffff8803c3f12000 task.ti: ffff8803c3f12000 [14318.122249] RIP: 0010:[] [] iommu_no_mapping+0x11/0x120 [14318.122251] RSP: 0018:ffff8803c3f13ca8 EFLAGS: 00010292 [14318.122252] RAX: 00000003ef3b7000 RBX: 0000000000000000 RCX: 0000000000000000 [14318.122253] RDX: 0000000000000001 RSI: ffff880406ed3a18 RDI: 0000000000000000 [14318.122254] RBP: ffff880406ed3900 R08: 0000000000000000 R09: 000000000000000b [14318.122255] R10: ffffffff813ae920 R11: ffff880080000000 R12: ffff880406ed3a18 [14318.122256] R13: 000077ff80000000 R14: 0000000000000000 R15: ffff880406ed3a00 [14318.122257] FS: 00007f9a3778d900(0000) GS:ffff88042dd40000(0000) knlGS:0000000000000000 [14318.122258] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [14318.122259] CR2: 0000000000000088 CR3: 000000000160b000 CR4: 00000000001407e0 [14318.122260] Stack: [14318.122261] ffff8800c9e75308 0000000000000000 ffff880406ed3900 ffffffff813ae94d [14318.122263] 0000000000000000 0000000000000000 ffff880406ed3900 ffffea0000000000 [14318.122265] 000077ff80000000 0000000000000000 ffff880406ed3a00 ffffffffa08e61ca [14318.122266] Call Trace: [14318.122269] [] ? intel_unmap_sg+0x2d/0x180 [14318.122301] [] ? nv_free_system_pages+0xca/0x370 [nvidia] [14318.122323] [] ? nv_free_pages+0xbd/0xd0 [nvidia] [14318.122345] [] ? nvidia_close+0x334/0x440 [nvidia] [14318.122366] [] ? nvidia_frontend_close+0x4d/0xa0 [nvidia] [14318.122369] [] ? __fput+0xcd/0x230 [14318.122371] [] ? do_exit+0x755/0xa10 [14318.122373] [] ? task_work_run+0xac/0xd0 [14318.122375] [] ? do_exit+0x762/0xa10 [14318.122377] [] ? __secure_computing+0xbe/0x220 [14318.122379] [] ? do_group_exit+0x38/0xa0 [14318.122381] [] ? SyS_exit_group+0x12/0x20 [14318.122384] [] ? tracesys+0xdd/0xe2 [14318.122384] Code: 22 ff ff ff 66 0f 1f 44 00 00 e8 5b 45 0d 00 66 66 2e 0f 1f 84 00 00 00 00 00 48 83 ec 18 48 89 5c 24 08 48 89 fb 48 89 6c 24 10 <48> 81 bf 88 00 00 00 c0 25 64 81 0f 85 d6 00 00 00 48 8b 87 f0 [14318.122401] RIP [] iommu_no_mapping+0x11/0x120 [14318.122403] RSP [14318.122403] CR2: 0000000000000088 [14318.122412] ---[ end trace 4432ecb63333a156 ]--- [14318.122413] Fixing recursive fault but reboot is needed! [19987.256504] Watchdog[21155]: segfault at 0 ip 00007f6b3dc5bbae sp 00007f6b27f1c7c0 error 6 in chrome[7f6b3a41a000+51de000]