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linux/drivers/gpu/drm
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Tobias Klausmann e94c55b8e0 nouveau: Skip unvailable ttm page entries 
Starting with commit f295c8cfec
("drm/nouveau: fix dma syncing warning with debugging on.")
the following oops occures:

   BUG: kernel NULL pointer dereference, address: 0000000000000000
   #PF: supervisor read access in kernel mode
   #PF: error_code(0x0000) - not-present page
   PGD 0 P4D 0
   Oops: 0000 [#1] PREEMPT SMP PTI
   CPU: 6 PID: 1013 Comm: Xorg.bin Tainted: G E     5.11.0-desktop-rc0+ #2
   Hardware name: Acer Aspire VN7-593G/Pluto_KLS, BIOS V1.11 08/01/2018
   RIP: 0010:nouveau_bo_sync_for_device+0x40/0xb0 [nouveau]
   Call Trace:
    nouveau_bo_validate+0x5d/0x80 [nouveau]
    nouveau_gem_ioctl_pushbuf+0x662/0x1120 [nouveau]
    ? nouveau_gem_ioctl_new+0xf0/0xf0 [nouveau]
    drm_ioctl_kernel+0xa6/0xf0 [drm]
    drm_ioctl+0x1f4/0x3a0 [drm]
    ? nouveau_gem_ioctl_new+0xf0/0xf0 [nouveau]
    nouveau_drm_ioctl+0x50/0xa0 [nouveau]
    __x64_sys_ioctl+0x7e/0xb0
    do_syscall_64+0x33/0x80
    entry_SYSCALL_64_after_hwframe+0x44/0xae
   ---[ end trace ccfb1e7f4064374f ]---
   RIP: 0010:nouveau_bo_sync_for_device+0x40/0xb0 [nouveau]

The underlying problem is not introduced by the commit, yet it uncovered the
underlying issue. The cited commit relies on valid pages. This is not given for
due to some bugs. For now, just warn and work around the issue by just ignoring
the bad ttm objects.
Below is some debug info gathered while debugging this issue:

nouveau 0000:01:00.0: DRM: ttm_dma->num_pages: 2048
nouveau 0000:01:00.0: DRM: ttm_dma->pages is NULL
nouveau 0000:01:00.0: DRM: ttm_dma: 00000000e96058e7
nouveau 0000:01:00.0: DRM: ttm_dma->page_flags:
nouveau 0000:01:00.0: DRM: ttm_dma:   Populated: 1
nouveau 0000:01:00.0: DRM: ttm_dma:   No Retry: 0
nouveau 0000:01:00.0: DRM: ttm_dma:   SG: 256
nouveau 0000:01:00.0: DRM: ttm_dma:   Zero Alloc: 0
nouveau 0000:01:00.0: DRM: ttm_dma:   Swapped: 0

Signed-off-by: Tobias Klausmann <tobias.klausmann@freenet.de>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210313222159.3346-1-tobias.klausmann@freenet.de
2021-03-19 10:38:31 +10:00
..
amd drm/amd/display: Remove MPC gamut remap logic for DCN30 2021-03-18 00:05:22 -04:00
arc drm: Constify drm_driver in drivers that don't modify it 2021-01-05 07:20:36 +02:00
arm drm-misc-next for v5.12: 2021-01-07 10:46:32 +01:00
armada
aspeed
ast drm/ast: Remove references to struct drm_device.pdev 2021-01-06 15:38:30 +01:00
atmel-hlcdc
bochs drm/bochs: Remove references to struct drm_device.pdev 2021-01-06 15:42:55 +01:00
bridge drm pull for 5.12-rc1 2021-02-21 14:44:44 -08:00
etnaviv Revert "drm/scheduler: Job timeout handler returns status (v3)" 2021-02-10 15:26:00 +01:00
exynos drm/exynos: Use FOLL_LONGTERM for g2d cmdlists 2021-01-12 14:14:38 +01:00
fsl-dcu
gma500 platform-drivers-x86 for v5.12-1 2021-02-22 08:50:01 -08:00
hisilicon drm/hisilicon/hibmc: Remove hibmc_ttm.c 2021-01-15 10:06:00 +01:00
i2c
i810
i915 i915/perf: Start hrtimer only if sampling the OA buffer 2021-03-17 12:51:37 +02:00
imx drm/imx: dw_hdmi-imx: depend on OF to fix randconfig compile tests on x86_64 2021-01-07 11:54:21 +01:00
ingenic
kmb - Add default modes for connectors in unknown state 2021-01-07 13:02:57 +01:00
lib
lima Revert "drm/scheduler: Job timeout handler returns status (v3)" 2021-02-10 15:26:00 +01:00
mcde
mediatek Mediatek DRM Next for Linux 5.12 2021-02-05 09:25:26 +10:00
meson drm: meson_drv add shutdown function 2021-03-11 11:11:33 +01:00
mga drm/mga/mga_ioc32: Fix some formatting issues in 'mga_compat_ioctl's header 2021-01-18 15:41:12 +01:00
mgag200 drm/mgag200: Remove references to struct drm_device.pdev 2021-01-06 15:43:13 +01:00
msm drm fixes for 5.12-rc1 + msm-next 2021-02-25 12:10:22 -08:00
mxsfb
nouveau nouveau: Skip unvailable ttm page entries 2021-03-19 10:38:31 +10:00
omapdrm drm/omap: dsi: fix unsigned expression compared with zero 2021-03-17 13:59:23 +02:00
panel drm/panel: kd35t133: allow using non-continuous dsi clock 2021-02-25 10:18:45 +01:00
panfrost Revert "drm/scheduler: Job timeout handler returns status (v3)" 2021-02-10 15:26:00 +01:00
pl111 ARM updates for 5.12-rc1: 2021-02-22 14:27:07 -08:00
qxl qxl: Fix uninitialised struct field head.surface_id 2021-03-11 11:11:33 +01:00
r128 drm/r128/r128_ioc32: Fix formatting issues in 'r128_compat_ioctl()'s header 2021-01-18 15:41:04 +01:00
radeon Merge tag 'amd-drm-fixes-5.12-2021-03-10' of https://gitlab.freedesktop.org/agd5f/linux into drm-fixes 2021-03-12 11:20:02 +10:00
rcar-du - Add default modes for connectors in unknown state 2021-01-07 13:02:57 +01:00
rockchip drm/rockchip: Require the YTR modifier for AFBC 2021-02-25 10:18:45 +01:00
savage
scheduler Revert "drm/scheduler: Job timeout handler returns status (v3)" 2021-02-10 15:26:00 +01:00
selftests
shmobile
sis
sti drm: sti: Remove unnecessary drm_plane_cleanup() wrapper 2021-01-05 07:20:21 +02:00
stm
sun4i drm pull for 5.12-rc1 2021-02-21 14:44:44 -08:00
tdfx drm: Constify drm_driver in drivers that don't modify it 2021-01-05 07:20:36 +02:00
tegra drm/tegra: Fix reference leak when pm_runtime_get_sync() fails 2021-01-15 17:24:51 +01:00
tidss
tilcdc doc: use KCFLAGS instead of EXTRA_CFLAGS to pass flags from command line 2021-02-22 13:59:10 -07:00
tiny drm: Use USB controller's DMA mask when importing dmabufs 2021-03-11 11:11:33 +01:00
ttm drm/ttm: Fix TTM page pool accounting 2021-03-11 11:11:33 +01:00
tve200 drm/tve200: remove unused including <linux/version.h> 2020-12-30 11:25:05 +01:00
udl drm: Use USB controller's DMA mask when importing dmabufs 2021-03-11 11:11:33 +01:00
v3d Revert "drm/scheduler: Job timeout handler returns status (v3)" 2021-02-10 15:26:00 +01:00
vboxvideo drm/vboxvideo: Remove references to struct drm_device.pdev 2021-01-06 15:44:04 +01:00
vc4 drm pull for 5.12-rc1 2021-02-21 14:44:44 -08:00
vgem
via
virtio drm/virtio: fix an error code in virtio_gpu_init() 2021-02-09 17:16:57 +01:00
vkms drm/vkms: Fix missing kmalloc allocation failure check 2021-01-15 17:45:07 -03:00
vmwgfx mm: use is_cow_mapping() across tree where proper 2021-03-13 11:27:30 -08:00
xen
xlnx drm/xlnx: fix kmemleak by sending vblank_event in atomic_disable 2021-02-03 11:42:34 +01:00
zte drm: zte: Remove unnecessary drm_plane_cleanup() wrapper 2021-01-05 07:20:24 +02:00
drm_agpsupport.c drm: Upcast struct drm_device.dev to struct pci_device; replace pdev 2021-01-19 09:06:38 +01:00
drm_atomic_helper.c Linux 5.11-rc5 2021-01-25 14:35:44 +10:00
drm_atomic_state_helper.c
drm_atomic_uapi.c
drm_atomic.c
drm_auth.c
drm_blend.c
drm_bridge_connector.c
drm_bridge.c
drm_bufs.c drm: Upcast struct drm_device.dev to struct pci_device; replace pdev 2021-01-19 09:06:38 +01:00
drm_cache.c drm: Include <linux/mem_encrypt.h> in drm_cache.c 2021-01-14 09:42:31 +01:00
drm_client_modeset.c drm: replace drm_modeset_lock_all() in drm_client_modeset_dpms_legacy() 2021-02-09 17:16:57 +01:00
drm_client.c
drm_color_mgmt.c
drm_connector.c
drm_context.c
drm_crtc_helper_internal.h drm: remove drm_fb_helper_modinit 2021-02-08 12:20:38 +01:00
drm_crtc_helper.c
drm_crtc_internal.h
drm_crtc.c drm/imx: fixes and drm managed resources 2021-01-07 11:24:50 +01:00
drm_damage_helper.c
drm_debugfs_crc.c
drm_debugfs.c
drm_dma.c
drm_dp_aux_dev.c
drm_dp_cec.c
drm_dp_dual_mode_helper.c
drm_dp_helper.c - HDCP 2.2 and HDCP 1.4 Gen12 DP MST support (Anshuman) 2021-01-29 17:05:15 +10:00
drm_dp_mst_topology_internal.h
drm_dp_mst_topology.c drm pull for 5.12-rc1 2021-02-21 14:44:44 -08:00
drm_drv.c drm: Unamp the entire device address space on device unplug 2021-01-19 10:22:14 +01:00
drm_dsc.c
drm_dumb_buffers.c drm: Don't export the drm_gem_dumb_destroy() function 2021-01-05 07:20:25 +02:00
drm_edid_load.c
drm_edid.c drm: Upcast struct drm_device.dev to struct pci_device; replace pdev 2021-01-19 09:06:38 +01:00
drm_encoder_slave.c
drm_encoder.c drm: add drmm_encoder_alloc() 2021-01-04 12:59:33 +01:00
drm_fb_cma_helper.c
drm_fb_helper.c drm/fb-helper: only unmap if buffer not null 2021-03-11 11:08:14 +01:00
drm_file.c drm/drm_vblank: set the dma-fence timestamp during send_vblank_event 2021-02-24 21:05:54 +05:30
drm_flip_work.c
drm_format_helper.c
drm_fourcc.c
drm_framebuffer.c
drm_gem_cma_helper.c
drm_gem_framebuffer_helper.c
drm_gem_shmem_helper.c drm/shmem-helpers: vunmap: Don't put pages for dma-buf 2021-03-11 11:11:33 +01:00
drm_gem_ttm_helper.c
drm_gem_vram_helper.c drm/vram-helper: Reuse existing page mappings in vmap 2021-01-19 15:37:14 +01:00
drm_gem.c drm: Set vm_ops to GEM object's values during mmap 2021-01-18 10:37:26 +01:00
drm_hashtab.c
drm_hdcp.c
drm_internal.h drm: Don't export the drm_gem_dumb_destroy() function 2021-01-05 07:20:25 +02:00
drm_ioc32.c drm/compat: Clear bounce structures 2021-03-11 11:11:33 +01:00
drm_ioctl.c
drm_irq.c drm: Upcast struct drm_device.dev to struct pci_device; replace pdev 2021-01-19 09:06:38 +01:00
drm_kms_helper_common.c drm: remove drm_fb_helper_modinit 2021-02-08 12:20:38 +01:00
drm_lease.c
drm_legacy_misc.c
drm_legacy.h drm: Merge CONFIG_DRM_VM into CONFIG_DRM_LEGACY 2021-01-13 14:22:37 +01:00
drm_lock.c
drm_managed.c
drm_memory.c drm: Implement drm_need_swiotlb() in drm_cache.c 2021-01-13 14:22:29 +01:00
drm_mipi_dbi.c
drm_mipi_dsi.c
drm_mm.c
drm_mode_config.c drm-misc-next for v5.12: 2021-01-07 13:40:20 +01:00
drm_mode_object.c
drm_modes.c drm/modes: Switch to 64bit maths to avoid integer overflow 2021-01-14 19:37:53 +02:00
drm_modeset_helper.c
drm_modeset_lock.c
drm_of.c
drm_panel_orientation_quirks.c
drm_panel.c
drm_pci.c drm: Upcast struct drm_device.dev to struct pci_device; replace pdev 2021-01-19 09:06:38 +01:00
drm_plane_helper.c
drm_plane.c Linux 5.11-rc5 2021-01-25 14:35:44 +10:00
drm_prime.c drm: Set vm_ops to GEM object's values during mmap 2021-01-18 10:37:26 +01:00
drm_print.c
drm_probe_helper.c drm: Add default modes for connectors in unknown state 2021-01-05 07:19:50 +02:00
drm_property.c
drm_rect.c
drm_scatter.c
drm_scdc_helper.c
drm_self_refresh_helper.c
drm_simple_kms_helper.c drm/simple_kms_helper: add drmm_simple_encoder_alloc() 2021-01-04 12:59:33 +01:00
drm_syncobj.c drm/syncobj: Fix use-after-free 2021-01-20 10:28:39 +01:00
drm_sysfs.c
drm_trace_points.c
drm_trace.h
drm_vblank_work.c
drm_vblank.c drm/drm_vblank: set the dma-fence timestamp during send_vblank_event 2021-02-24 21:05:54 +05:30
drm_vm.c drm: Upcast struct drm_device.dev to struct pci_device; replace pdev 2021-01-19 09:06:38 +01:00
drm_vma_manager.c
drm_writeback.c
Kconfig Merge tag 'amd-drm-fixes-5.12-2021-03-10' of https://gitlab.freedesktop.org/agd5f/linux into drm-fixes 2021-03-12 11:20:02 +10:00
Makefile drm: Merge CONFIG_DRM_VM into CONFIG_DRM_LEGACY 2021-01-13 14:22:37 +01:00