Created attachment 130660 [details] kernel messages log Sorry if this is drm error and not a nouveau error. BUG: unable to handle kernel NULL pointer dereference at 0000000000000021 IP: dma_fence_wait_timeout+0x30/0x110 I had just started the computer, and started X with startx (because reasons). I had opened the configure prefences when the mouse froze. I'm including the kernel boot messages and traceback as an attachment. libdrm_nouveau2-32bit-2.4.75-1.1.x86_64 libdrm_nouveau2-2.4.75-1.1.x86_64 libvdpau_nouveau-17.0.1-157.1.x86_64 Mesa-dri-nouveau-17.0.1-157.1.x86_64 xf86-video-nouveau-1.0.14-1.1.x86_64 xorg-x11-7.6_1-16.2.noarch xorg-x11-devel-7.6-47.2.noarch xorg-x11-driver-input-7.6_1-14.1.noarch xorg-x11-driver-video-7.6_1-15.2.x86_64 xorg-x11-essentials-7.6_1-16.2.noarch xorg-x11-fonts-7.6-31.7.noarch xorg-x11-fonts-core-7.6-31.7.noarch xorg-x11-libs-7.6-47.2.noarch xorg-x11-libX11-ccache-7.6-20.4.noarch xorg-x11-server-1.19.3-1.1.x86_64 xorg-x11-util-devel-7.6_1-10.2.noarch xorg-x11-Xvnc-1.7.1-3.1.x86_64 2017-04-03T20:10:19.720098-05:00 mothra kernel: [ 211.555207] Oops: 0000 [#1] PREEMPT SMP [ 211.555212] Modules linked in: rfcomm fuse vboxpci(O) vboxnetadp(O) vboxnetflt(O) snd_hda_codec_hdmi bnep vboxdrv(O) msr snd_hda_codec_idt snd_hda_codec_generic btusb btrtl btbcm btintel bluetooth arc4 brcmsmac uvcvideo cordic brcmutil videobuf2_vmalloc videobuf2_memops intel_rapl videobuf2_v4l2 videobuf2_core x86_pkg_temp_thermal b43 intel_powerclamp videodev coretemp mac80211 kvm_intel kvm cfg80211 irqbypass dell_rbtn crct10dif_pclmul crc32_pclmul ssb crc32c_intel ghash_clmulni_intel dell_laptop dell_wmi sparse_keymap iTCO_wdt rfkill dell_smbios pcmcia pcbc mei_wdt dcdbas iTCO_vendor_support pcmcia_core dell_smm_hwmon snd_hda_intel aesni_intel snd_hda_codec snd_hda_core snd_hwdep aes_x86_64 snd_pcm snd_seq crypto_simd glue_helper cryptd pcspkr joydev snd_seq_device parport_pc bcma snd_timer ppdev [ 211.555287] parport snd e1000e mei_me soundcore thermal ptp lpc_ich fjes mei pps_core tpm_tis mfd_core tpm_tis_core battery i2c_i801 dell_smo8800 shpchp tpm ac nouveau serio_raw mxm_wmi i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops sdhci_pci xhci_pci ttm sdhci ehci_pci xhci_hcd ehci_hcd mmc_core drm usbcore wmi video button sg dm_multipath dm_mod scsi_dh_rdac scsi_dh_emc scsi_dh_alua [ 211.555335] CPU: 0 PID: 2979 Comm: InputThread Tainted: G O 4.10.5-1-default #1 [ 211.555340] Hardware name: Dell Inc. Latitude E6530/07Y85M, BIOS A02 04/24/2012 [ 211.555346] task: ffffa058dbf54000 task.stack: ffffae9d42530000 [ 211.555353] RIP: 0010:dma_fence_wait_timeout+0x30/0x110 [ 211.555357] RSP: 0018:ffffae9d42533ac0 EFLAGS: 00010206 [ 211.555362] RAX: 0000000000000001 RBX: ffffa058d9759c00 RCX: ffffffffc05a7fa0 [ 211.555367] RDX: 7fffffffffffffff RSI: 0000000000000001 RDI: ffffa058dc592c00 [ 211.555372] RBP: ffffa058dc592c00 R08: 0000000000000004 R09: ffffa058dc592c00 [ 211.555377] R10: 00000000fb000000 R11: ffffae9d42533db8 R12: 0000000000000001 [ 211.555381] R13: 7fffffffffffffff R14: 0000000000000001 R15: 0000000000000001 [ 211.555405] FS: 00007f449b47d700(0000) GS:ffffa058edc00000(0000) knlGS:0000000000000000 [ 211.555427] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 211.555448] CR2: 0000000000000021 CR3: 0000000419549000 CR4: 00000000001406f0 [ 211.555470] Call Trace: [ 211.555514] drm_atomic_helper_wait_for_fences+0x48/0x130 [drm_kms_helper] [ 211.555607] nv50_disp_atomic_commit+0x18e/0x290 [nouveau] [ 211.555643] drm_atomic_helper_update_plane+0xeb/0x150 [drm_kms_helper] [ 211.555690] __setplane_internal+0x1d9/0x2a0 [drm] [ 211.555718] ? enqueue_entity+0x110/0x6d0 [ 211.555754] drm_mode_cursor_universal+0x10b/0x1e0 [drm] [ 211.555792] drm_mode_cursor_common+0x80/0x170 [drm] [ 211.555829] drm_mode_cursor_ioctl+0x44/0x50 [drm] [ 211.555866] drm_ioctl+0x1ec/0x410 [drm] [ 211.555903] ? drm_mode_setplane+0x1a0/0x1a0 [drm] [ 211.555980] nouveau_drm_ioctl+0x66/0xc0 [nouveau] [ 211.556010] do_vfs_ioctl+0x8f/0x5d0 [ 211.556036] ? __fget+0x70/0xc0 [ 211.556058] SyS_ioctl+0x74/0x80 [ 211.556086] entry_SYSCALL_64_fastpath+0x1e/0xad
Most likely the same root cause as #100431, i.e., use-after-tree of a dma_fence object on nv50
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