(gdb) bt
#0  0x00007fd721dc1f07 in ioctl () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fd5272c6238 in drmIoctl () from /usr/lib/x86_64-linux-gnu/libdrm.so.2
#2  0x00007fd5261a2169 in amdgpu_cs_query_fence_status () from /usr/lib/x86_64-linux-gnu/libdrm_amdgpu.so.1
#3  0x00007fd526cc6b97 in amdgpu_fence_wait (fence=0xf558e0, timeout=18446744073709551615, absolute=true) at amdgpu_cs.c:117
#4  0x00007fd526cc4a0b in amdgpu_bo_wait (_buf=<optimized out>, timeout=<optimized out>, usage=<optimized out>) at amdgpu_bo.c:124
#5  0x00007fd526cc58ed in amdgpu_bo_map (buf=0xf50340, rcs=0x0, usage=258) at amdgpu_bo.c:291
#6  0x00007fd526cf8153 in r600_texture_transfer_map (ctx=<optimized out>, texture=<optimized out>, level=<optimized out>, usage=<optimized out>, box=<optimized out>, ptransfer=<optimized out>) at r600_texture.c:1822
#7  0x00007fd526a36c5a in pipe_transfer_map_3d (context=0x7, resource=0xc0206449, level=4294966784, access=3689984816, z=0, d=<optimized out>, transfer=0x7fffdbf0b560, x=<optimized out>, y=<optimized out>, w=<optimized out>, 
    h=<optimized out>) at ../../src/gallium/auxiliary/util/u_inlines.h:471
#8  st_texture_image_map (st=<optimized out>, stImage=0xba6040, usage=3689984816, x=<optimized out>, y=<optimized out>, z=0, w=1, h=582, d=1, transfer=0x7fffdbf0b560) at state_tracker/st_texture.c:277
#9  0x00007fd526a04b23 in st_MapTextureImage (ctx=<optimized out>, texImage=0xba6040, slice=0, x=0, y=0, w=4294966784, h=<optimized out>, mode=<optimized out>, mapOut=<optimized out>, rowStrideOut=<optimized out>)
    at state_tracker/st_cb_texture.c:256
#10 0x00007fd5269a3236 in store_texsubimage (ctx=<optimized out>, texImage=<optimized out>, xoffset=<optimized out>, yoffset=0, zoffset=<optimized out>, width=<optimized out>, height=1, depth=<optimized out>, format=<optimized out>, 
    type=<optimized out>, pixels=<optimized out>, packing=<optimized out>, caller=<optimized out>) at main/texstore.c:1066
#11 0x00007fd5269a3370 in _mesa_store_texsubimage (ctx=0x7, dims=<optimized out>, texImage=0xc0206449, xoffset=-604982640, yoffset=568073991, zoffset=0, width=1, height=1, depth=1, format=6402, type=5125, pixels=0x0, packing=0xd4df38)
    at main/texstore.c:1139
#12 0x00007fd526a0097a in st_TexSubImage (ctx=<optimized out>, dims=<optimized out>, texImage=<optimized out>, xoffset=<optimized out>, yoffset=0, zoffset=<optimized out>, width=<optimized out>, height=1, depth=<optimized out>, 
    format=<optimized out>, type=<optimized out>, pixels=<optimized out>, unpack=<optimized out>) at state_tracker/st_cb_texture.c:1611
#13 0x00007fd526996d3b in texture_sub_image (ctx=<optimized out>, dims=<optimized out>, texObj=<optimized out>, texImage=<optimized out>, target=<optimized out>, level=<optimized out>, xoffset=<optimized out>, yoffset=<optimized out>, 
    zoffset=<optimized out>, width=<optimized out>, height=<optimized out>, depth=<optimized out>, format=<optimized out>, type=<optimized out>, pixels=<optimized out>, 
    dsa=<error reading variable: access outside bounds of object referenced via synthetic pointer>) at main/teximage.c:3286
#14 0x00007fd526990e45 in texsubimage_err (ctx=0xd32000, dims=2, target=34069, level=0, xoffset=<optimized out>, yoffset=<optimized out>, zoffset=<optimized out>, width=<optimized out>, height=<optimized out>, depth=<optimized out>, 
    format=<optimized out>, type=<optimized out>, pixels=<optimized out>, callerName=0x7fd526d5c9bd "glTexSubImage2D") at main/teximage.c:3344
#15 0x00007fd526990f6b in _mesa_TexSubImage2D (target=3689984656, level=568073991, xoffset=0, yoffset=0, width=<optimized out>, height=<optimized out>, format=6402, type=5125, pixels=0x0) at main/teximage.c:3529
#16 0x00007fd539bc7da0 in TOpenGLTexture<FOpenGLBaseTextureCube>::Unlock (this=0x7fd53dad6600, MipIndex=0, ArrayIndex=0) at /opt/Valve/UnrealEngine/Engine/Source/Runtime/OpenGLDrv/Private/OpenGLTexture.cpp:1090
#17 0x00007fd539ba8b46 in FOpenGLDynamicRHI::RHIUnlockTextureCubeFace (this=0x7fd5db7e0000, TextureCubeRHI=0x7fd53dad6600, FaceIndex=0, ArrayIndex=0, MipIndex=0, bLockWithinMiptail=false)
    at /opt/Valve/UnrealEngine/Engine/Source/Runtime/OpenGLDrv/Private/OpenGLTexture.cpp:2279
#18 0x00007fd72f3d3b00 in FRHICommandListImmediate::UnlockTextureCubeFace (this=0x6b7040 <GRHICommandList+16>, Texture=0x7fd53dad6600, FaceIndex=0, ArrayIndex=0, MipIndex=0, bLockWithinMiptail=false)
    at /opt/Valve/UnrealEngine/Engine/Source/Runtime/RHI/Public/RHICommandList.h:3062
#19 0x00007fd72f3d3284 in RHIUnlockTextureCubeFace (Texture=0x7fd53dad6600, FaceIndex=0, ArrayIndex=0, MipIndex=0, bLockWithinMiptail=false) at /opt/Valve/UnrealEngine/Engine/Source/Runtime/RHI/Public/RHICommandList.h:3793
#20 0x00007fd72b569e15 in FSolidColorTextureCube::InitRHI (this=0x7fd53aef1a50) at /opt/Valve/UnrealEngine/Engine/Source/Runtime/RenderCore/Private/RenderUtils.cpp:449
#21 0x00007fd539b5a16f in FOpenGLDynamicRHI::Init (this=0x7fd5db7e0000) at /opt/Valve/UnrealEngine/Engine/Source/Runtime/OpenGLDrv/Private/OpenGLDevice.cpp:1439

(gdb) thread 35
[Switching to thread 35 (Thread 0x7fd51f1dc700 (LWP 4213))]
#0  __memcpy_sse2_unaligned () at ../sysdeps/x86_64/multiarch/memcpy-sse2-unaligned.S:37
37      ../sysdeps/x86_64/multiarch/memcpy-sse2-unaligned.S: No such file or directory.
(gdb) bt
#0  __memcpy_sse2_unaligned () at ../sysdeps/x86_64/multiarch/memcpy-sse2-unaligned.S:37
#1  0x00007fd526c8a8b6 in util_memcpy_cpu_to_le32 (dest=<optimized out>, src=<optimized out>, n=<optimized out>) at ../../../../src/gallium/auxiliary/util/u_math.h:601
#2  si_upload_const_buffer (sctx=0x7fd510002900, ptr=0x7fd51f1daff0 '\377' <repeats 128 times>, rbuffer=<optimized out>, size=<optimized out>, const_offset=<optimized out>) at si_descriptors.c:1188
#3  si_set_constant_buffer (sctx=<optimized out>, buffers=<optimized out>, descriptors_idx=<optimized out>, slot=<optimized out>, input=<optimized out>) at si_descriptors.c:1214
#4  0x00007fd526c8d321 in si_set_rw_buffer (sctx=0x7fd51c81d000, slot=10, input=0x0) at si_descriptors.c:1262
#5  si_set_polygon_stipple (ctx=<optimized out>, state=<optimized out>) at si_descriptors.c:1615
#6  0x00007fd526bf4220 in tc_batch_execute (thread_index=0, job=<optimized out>) at util/u_threaded_context.c:94
#7  _tc_sync (tc=<optimized out>, info=<optimized out>, func=<optimized out>) at util/u_threaded_context.c:185
#8  tc_flush (_pipe=<optimized out>, fence=<optimized out>, flags=<optimized out>) at util/u_threaded_context.c:1797
#9  0x00007fd526a2d203 in st_context_flush (stctxi=0x7fd51007a670, flags=3, fence=0x7fd51f1db110) at state_tracker/st_manager.c:636
#10 0x00007fd526b6191b in dri_flush (cPriv=<optimized out>, dPriv=<optimized out>, flags=<optimized out>, reason=<optimized out>) at dri_drawable.c:550
#11 0x00007fd528b9311e in loader_dri3_swap_buffers_msc (draw=0x7fd510000b58, target_msc=0, divisor=0, remainder=0, flush_flags=522039280, force_copy=<optimized out>) at loader_dri3_helper.c:641
#12 0x00007fd528b66eb5 in glXSwapBuffers (dpy=0xb1b4e0, drawable=50331656) at glxcmds.c:843

[Jul30 11:10] INFO: task PoolThread 12:4203 blocked for more than 120 seconds.
[  +0.000005]       Not tainted 4.12.4-041204-generic #201707271932
[  +0.000002] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  +0.000002] PoolThread 12   D    0  4203   3630 0x00000002
[  +0.000003] Call Trace:
[  +0.000009]  __schedule+0x3c9/0x850
[  +0.000003]  schedule+0x36/0x80
[  +0.000052]  amd_sched_entity_push_job+0xc4/0x110 [amdgpu]
[  +0.000004]  ? wake_atomic_t_function+0x60/0x60
[  +0.000040]  amdgpu_job_submit+0x72/0x90 [amdgpu]
[  +0.000033]  amdgpu_vm_bo_update_mapping+0x2b8/0x350 [amdgpu]
[  +0.000030]  ? amdgpu_vm_validate_level.isra.10+0x90/0x90 [amdgpu]
[  +0.000028]  amdgpu_vm_clear_freed+0x90/0x160 [amdgpu]
[  +0.000029]  amdgpu_gem_object_close+0x16d/0x1e0 [amdgpu]
[  +0.000017]  drm_gem_object_release_handle+0x4b/0x90 [drm]
[  +0.000011]  ? drm_gem_object_release_handle+0x4b/0x90 [drm]
[  +0.000011]  ? drm_gem_object_init+0x40/0x40 [drm]
[  +0.000003]  idr_for_each+0x48/0xe0
[  +0.000012]  drm_gem_release+0x20/0x30 [drm]
[  +0.000011]  drm_release+0x304/0x360 [drm]
[  +0.000003]  __fput+0xe7/0x220
[  +0.000002]  ____fput+0xe/0x10
[  +0.000003]  task_work_run+0x80/0xa0
[  +0.000003]  do_exit+0x2d8/0xaf0
[  +0.000003]  do_group_exit+0x43/0xb0
[  +0.000002]  get_signal+0x28a/0x5e0
[  +0.000005]  do_signal+0x37/0x730
[  +0.000003]  ? do_futex+0x2b2/0x520
[  +0.000004]  exit_to_usermode_loop+0x80/0xd0
[  +0.000003]  syscall_return_slowpath+0x59/0x60
[  +0.000003]  entry_SYSCALL_64_fastpath+0xa7/0xa9
[  +0.000001] RIP: 0033:0x7fd73b5aa709
[  +0.000002] RSP: 002b:00007fd529b4b8f0 EFLAGS: 00000202 ORIG_RAX: 00000000000000ca
[  +0.000002] RAX: fffffffffffffdfc RBX: 0000000000000000 RCX: 00007fd73b5aa709
[  +0.000001] RDX: 000000000003399b RSI: 0000000000000189 RDI: 00007fd53b9d504c
[  +0.000001] RBP: 00007fd529b4ba20 R08: 00007fd53b9d5020 R09: 00000000ffffffff
[  +0.000001] R10: 00007fd529b4b9b8 R11: 0000000000000202 R12: 000000000003399b
[  +0.000001] R13: 00007fd529b4b9b8 R14: ffffffffffffff92 R15: 0000000000000000