Aug 17 13:05:21 ph4 kernel: BUG: unable to handle kernel NULL pointer dereference at 0000000000000001 Aug 17 13:05:21 ph4 kernel: IP: [] amdgpu_fence_unref+0xf/0x30 [amdgpu] Aug 17 13:05:21 ph4 kernel: PGD bd103067 PUD bd110067 PMD 0 Aug 17 13:05:21 ph4 kernel: Oops: 0002 [#1] PREEMPT SMP Aug 17 13:05:21 ph4 kernel: Modules linked in: amdgpu fbcon bitblit fbcon_rotate fbcon_ccw fbcon_ud fbcon_cw softcursor font tileblit snd_hda_codec_realtek i2c_algo_bit snd_hda_codec_hdmi drm_kms_helper snd_hda_codec_generic snd_hda_intel snd_usb_audio ttm snd_hda_codec drm snd_usbmidi_lib snd_hda_core snd_rawmidi snd_hwdep snd_seq_device snd_pcm snd_timer xhci_pci xhci_hcd snd r8169 e100 i2c_piix4 mii pcspkr k10temp acpi_cpufreq soundcore Aug 17 13:05:21 ph4 kernel: CPU: 3 PID: 433 Comm: X Not tainted 4.2.0-rc3-g76c0366 #1 Aug 17 13:05:21 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 13:05:21 ph4 kernel: task: ffff880231a4b580 ti: ffff8800bd11c000 task.ti: ffff8800bd11c000 Aug 17 13:05:21 ph4 kernel: RIP: 0010:[] [] amdgpu_fence_unref+0xf/0x30 [amdgpu] Aug 17 13:05:21 ph4 kernel: RSP: 0018:ffff8800bd11fbd0 EFLAGS: 00010202 Aug 17 13:05:21 ph4 kernel: RAX: 0000000000000001 RBX: ffff880235176ee8 RCX: 0000000000b81063 Aug 17 13:05:21 ph4 kernel: RDX: 0000000000000000 RSI: ffff880235176e60 RDI: ffff880235176ee0 Aug 17 13:05:21 ph4 kernel: RBP: ffff8800bd11fc08 R08: 0000000000018240 R09: ffffea0002f7aec0 Aug 17 13:05:21 ph4 kernel: R10: ffffffffa03de882 R11: 0000000000000000 R12: ffff880235176ee8 Aug 17 13:05:21 ph4 kernel: R13: ffff880235176e68 R14: 0000000000000000 R15: ffff880231fe0000 Aug 17 13:05:21 ph4 kernel: FS: 00007f3868366880(0000) GS:ffff88023fd80000(0000) knlGS:0000000000000000 Aug 17 13:05:21 ph4 kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Aug 17 13:05:21 ph4 kernel: CR2: 0000000000000001 CR3: 00000000bd0b7000 CR4: 00000000000006e0 Aug 17 13:05:21 ph4 kernel: Stack: Aug 17 13:05:21 ph4 kernel: ffffffffa03eed3b ffff8800bd11fbd8 ffff880235176e00 ffff880231fe0000 Aug 17 13:05:21 ph4 kernel: ffff880231fe0018 00000000fffffe00 0000000000000044 ffff8800bd11fc28 Aug 17 13:05:21 ph4 kernel: ffffffffa03ebf93 ffff88022dc36000 0000000000000001 ffff8800bd11fc58 Aug 17 13:05:21 ph4 kernel: Call Trace: Aug 17 13:05:21 ph4 kernel: [] ? amdgpu_sync_free+0x4b/0x70 [amdgpu] Aug 17 13:05:21 ph4 kernel: [] amdgpu_ib_free+0x23/0x50 [amdgpu] Aug 17 13:05:21 ph4 kernel: [] amdgpu_cs_parser_fini_late+0xae/0x170 [amdgpu] Aug 17 13:05:21 ph4 kernel: [] amdgpu_cs_parser_prepare_job+0x5c/0x720 [amdgpu] Aug 17 13:05:21 ph4 kernel: [] ? amdgpu_cs_parser_init+0x1e7/0x310 [amdgpu] Aug 17 13:05:21 ph4 kernel: [] amdgpu_cs_ioctl+0x92/0x2f0 [amdgpu] Aug 17 13:05:21 ph4 kernel: [] drm_ioctl+0x1a5/0x610 [drm] Aug 17 13:05:21 ph4 kernel: [] ? get_parent_ip+0x11/0x50 Aug 17 13:05:21 ph4 kernel: [] ? preempt_count_add+0x51/0xa0 Aug 17 13:05:21 ph4 kernel: [] ? _raw_spin_unlock_irqrestore+0x13/0x30 Aug 17 13:05:21 ph4 kernel: [] amdgpu_drm_ioctl+0x54/0x90 [amdgpu] Aug 17 13:05:21 ph4 kernel: [] do_vfs_ioctl+0x2cd/0x4b0 Aug 17 13:05:21 ph4 kernel: [] ? __sys_recvmsg+0x44/0x80 Aug 17 13:05:21 ph4 kernel: [] SyS_ioctl+0x47/0x80 Aug 17 13:05:21 ph4 kernel: [] entry_SYSCALL_64_fastpath+0x16/0x6e Aug 17 13:05:21 ph4 kernel: Code: c7 5c 76 46 a0 e8 62 c0 c7 e0 48 8b 45 f8 c6 05 2f bf 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 ee 00 fe e0 5d f3 Aug 17 13:05:21 ph4 kernel: RIP [] amdgpu_fence_unref+0xf/0x30 [amdgpu] Aug 17 13:05:21 ph4 kernel: RSP Aug 17 13:05:21 ph4 kernel: CR2: 0000000000000001 Aug 17 13:05:21 ph4 kernel: ---[ end trace 5945f920f3cb189e ]---