Aug 17 16:32:35 ph4 kernel: BUG: unable to handle kernel NULL pointer dereference at 0000000000000001 Aug 17 16:32:35 ph4 kernel: IP: [] amdgpu_fence_unref+0xf/0x30 [amdgpu] Aug 17 16:32:35 ph4 kernel: PGD 235bc6067 PUD 23373c067 PMD 0 Aug 17 16:32:35 ph4 kernel: Oops: 0002 [#1] PREEMPT SMP Aug 17 16:32:35 ph4 kernel: Modules linked in: amdgpu fbcon bitblit fbcon_rotate fbcon_ccw fbcon_ud fbcon_cw snd_hda_codec_realtek softcursor snd_hda_codec_hdmi snd_hda_codec_generic snd_usb_audio snd_hda_intel font i2c_algo_bit tileblit snd_hda_codec drm_kms_helper snd_usbmidi_lib snd_hda_core syscopyarea sysfillrect snd_rawmidi sysimgblt fb_sys_fops snd_hwdep ttm snd_seq_device snd_pcm snd_timer drm xhci_pci snd xhci_hcd acpi_cpufreq i2c_piix4 r8169 e100 soundcore mii k10temp pcspkr Aug 17 16:32:35 ph4 kernel: CPU: 3 PID: 436 Comm: X Not tainted 4.2.0-rc7-g1bf421d #1 Aug 17 16:32:35 ph4 kernel: Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./970 Extreme3 R2.0, BIOS P1.60 06/05/2014 Aug 17 16:32:35 ph4 kernel: task: ffff8800bd211ac0 ti: ffff880235b98000 task.ti: ffff880235b98000 Aug 17 16:32:35 ph4 kernel: RIP: 0010:[] [] amdgpu_fence_unref+0xf/0x30 [amdgpu] Aug 17 16:32:35 ph4 kernel: RSP: 0018:ffff880235b9bbd0 EFLAGS: 00010202 Aug 17 16:32:35 ph4 kernel: RAX: 0000000000000001 RBX: ffff8800b1f1b8e8 RCX: 00000000004487bb Aug 17 16:32:35 ph4 kernel: RDX: 0000000000000000 RSI: ffff8800b1f1b860 RDI: ffff8800b1f1b8e0 Aug 17 16:32:35 ph4 kernel: RBP: ffff880235b9bc08 R08: 0000000000018240 R09: ffffea0008a77900 Aug 17 16:32:35 ph4 kernel: R10: ffffffffa034b8e2 R11: 0000000000000000 R12: ffff8800b1f1b8e8 Aug 17 16:32:35 ph4 kernel: R13: ffff8800b1f1b868 R14: 0000000000000000 R15: ffff8800bc7f8000 Aug 17 16:32:35 ph4 kernel: FS: 00007f2334860880(0000) GS:ffff88023fd80000(0000) knlGS:0000000000000000 Aug 17 16:32:35 ph4 kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Aug 17 16:32:35 ph4 kernel: CR2: 0000000000000001 CR3: 0000000234bf2000 CR4: 00000000000006e0 Aug 17 16:32:35 ph4 kernel: Stack: Aug 17 16:32:35 ph4 kernel: ffffffffa035bd8b ffff880235b9bbd8 ffff8800b1f1b800 ffff8800bc7f8000 Aug 17 16:32:35 ph4 kernel: ffff8800bc7f8018 00000000fffffe00 ffff8802334a6800 ffff880235b9bc28 Aug 17 16:32:35 ph4 kernel: ffffffffa0358fe3 ffff88022948a300 0000000000000001 ffff880235b9bc58 Aug 17 16:32:35 ph4 kernel: Call Trace: Aug 17 16:32:35 ph4 kernel: [] ? amdgpu_sync_free+0x4b/0x70 [amdgpu] Aug 17 16:32:35 ph4 kernel: [] amdgpu_ib_free+0x23/0x50 [amdgpu] Aug 17 16:32:35 ph4 kernel: [] amdgpu_cs_parser_fini_late+0xae/0x170 [amdgpu] Aug 17 16:32:35 ph4 kernel: [] amdgpu_cs_parser_prepare_job+0x5c/0x720 [amdgpu] Aug 17 16:32:35 ph4 kernel: [] ? amdgpu_cs_parser_init+0x1e7/0x310 [amdgpu] Aug 17 16:32:35 ph4 kernel: [] amdgpu_cs_ioctl+0x92/0x2f0 [amdgpu] Aug 17 16:32:35 ph4 kernel: [] drm_ioctl+0x130/0x4e0 [drm] Aug 17 16:32:35 ph4 kernel: [] ? amdgpu_cs_parser_prepare_job+0x720/0x720 [amdgpu] Aug 17 16:32:35 ph4 kernel: [] ? get_parent_ip+0x11/0x50 Aug 17 16:32:35 ph4 kernel: [] ? preempt_count_add+0x51/0xa0 Aug 17 16:32:35 ph4 kernel: [] ? _raw_spin_unlock_irqrestore+0x13/0x30 Aug 17 16:32:35 ph4 kernel: [] amdgpu_drm_ioctl+0x54/0x90 [amdgpu] Aug 17 16:32:35 ph4 kernel: [] do_vfs_ioctl+0x2cd/0x4b0 Aug 17 16:32:35 ph4 kernel: [] ? __sys_recvmsg+0x44/0x80 Aug 17 16:32:35 ph4 kernel: [] SyS_ioctl+0x47/0x80 Aug 17 16:32:35 ph4 kernel: [] entry_SYSCALL_64_fastpath+0x16/0x6e Aug 17 16:32:35 ph4 kernel: Code: c7 34 4b 3d a0 e8 22 ef d0 e0 48 8b 45 f8 c6 05 9f c3 09 00 01 c9 c3 0f 1f 44 00 00 48 8b 07 48 c7 07 00 00 00 00 48 85 c0 74 14 83 28 01 74 01 c3 55 48 89 c7 48 89 e5 e8 1e 33 07 e1 5d f3 Aug 17 16:32:35 ph4 kernel: RIP [] amdgpu_fence_unref+0xf/0x30 [amdgpu] Aug 17 16:32:35 ph4 kernel: RSP Aug 17 16:32:35 ph4 kernel: CR2: 0000000000000001 Aug 17 16:32:35 ph4 kernel: ---[ end trace e769f4d31c03c87f ]--- Aug 17 16:36:39 ph4 kernel: sysrq: SysRq : Emergency Sync