Chris Wilson cc98e6ce6a drm: Initialise drm_mm.head_node.allocated ... commit 202b52b7fb ("drm: Track drm_mm nodes with an interval tree") introduced a requirement that the special drm_mm.head_node was initialised and marked as not being allocated. It is a very special node that has no side but has a hole that represents the drm_mm address space, and holds the list of nodes. Since it is not a real node, it is not part of the node rbtree and we detect this as it being unallocated. This presumed that drm_mm_init() was initialising it to zero. It happens that i915 kzallocs its objects and so it was accidentally setting it, but for generic use we cannot make that assumption. [ 22.981519] general protection fault: 0000 [#1] SMP [ 22.981521] Modules linked in: test_drm_mm(+) ctr ccm arc4 rt2800usb rt2x00usb rt2800lib rt2x00lib crc_ccitt mac80211 cmac rfcomm bnep snd_hda_codec_realtek snd_hda_codec_hdmi snd_hda_codec_generic snd_hda_intel dcdbas snd_hda_codec x86_pkg_temp_thermal intel_powerclamp btusb snd_hda_core coretemp crct10dif_pclmul cfg80211 btrtl btbcm btintel bluetooth crc32_pclmul ghash_clmulni_intel aesni_intel snd_pcm i2c_hid aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd snd_timer hid_multitouch snd joydev serio_raw lpc_ich mfd_core i2c_designware_platform i2c_designware_core 8250_dw binfmt_misc soundcore acpi_pad nls_iso8859_1 usbhid hid psmouse ahci libahci [last unloaded: test_drm_mm] [ 22.981544] CPU: 1 PID: 2088 Comm: drm_mm Tainted: G W 4.9.0-rc7+ #234 [ 22.981545] Hardware name: Dell Inc. XPS 13 9343/0310JH, BIOS A07 11/11/2015 [ 22.981546] task: ffff88020c971cc0 task.stack: ffffc90001728000 [ 22.981547] RIP: 0010:[<ffffffff814050f0>] [<ffffffff814050f0>] drm_mm_interval_tree_add_node+0xa0/0xd0 [ 22.981551] RSP: 0018:ffffc9000172ba98 EFLAGS: 00010202 [ 22.981552] RAX: 0f0000c69cf63d80 RBX: ffff88020be00000 RCX: ffff88020be00000 [ 22.981553] RDX: 0000000000000fff RSI: ffffc9000172bc48 RDI: ffffffff810ac4df [ 22.981553] RBP: ffffc9000172bb08 R08: ffffc9000172bc70 R09: 0000000000000fff [ 22.981554] R10: ffffffff810ac4d7 R11: 4dc04d8b4cffffe5 R12: 0000000000001000 [ 22.981555] R13: ffffc9000172bbd0 R14: ffffc9000172bbe0 R15: 0000000002000000 [ 22.981556] FS: 00007f80c9fab740(0000) GS:ffff88021f480000(0000) knlGS:0000000000000000 [ 22.981557] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.981558] CR2: 00007f80c9fd5000 CR3: 000000020c191000 CR4: 00000000003406e0 [ 22.981559] Stack: [ 22.981560] ffffffff81405d09 ffff88020be00000 ffffc9000172bbe0 000000000172bb08 [ 22.981562] ffffffffffffffff 0000000000000000 0000000000000000 0000000000000000 [ 22.981563] 0000000002000000 0000000002000000 ffffffffa02f3000 ffff88020be00000 [ 22.981565] Call Trace: [ 22.981568] [<ffffffff81405d09>] ? drm_mm_insert_node_generic+0x229/0x310 [ 22.981570] [<ffffffffa02f3000>] ? 0xffffffffa02f3000 [ 22.981572] [<ffffffffa02903c1>] __subtest_insert_range.constprop.7+0xd1/0x5b0 [test_drm_mm] [ 22.981575] [<ffffffff81081222>] ? default_wake_function+0x12/0x20 [ 22.981576] [<ffffffff81096905>] ? __wake_up_common+0x55/0x90 [ 22.981578] [<ffffffff81085f42>] ? sched_clock_cpu+0x72/0xa0 [ 22.981581] [<ffffffff811308ad>] ? irq_work_queue+0xd/0x80 [ 22.981582] [<ffffffff810abcc4>] ? wake_up_klogd+0x34/0x40 [ 22.981584] [<ffffffff810ac19d>] ? console_unlock+0x4cd/0x530 [ 22.981585] [<ffffffff810ac4d7>] ? vprintk_emit+0x2d7/0x490 [ 22.981587] [<ffffffff810ac82f>] ? vprintk_default+0x1f/0x30 [ 22.981589] [<ffffffff81146e1c>] ? printk+0x4d/0x4f [ 22.981590] [<ffffffffa02f3000>] ? 0xffffffffa02f3000 [ 22.981592] [<ffffffffa02908b5>] subtest_insert_range+0x15/0x80 [test_drm_mm] [ 22.981594] [<ffffffffa02f3088>] test_drm_mm_init+0x88/0x1000 [test_drm_mm] [ 22.981597] [<ffffffff8100043d>] do_one_initcall+0x3d/0x150 [ 22.981600] [<ffffffff8119dfbf>] ? kfree+0x13f/0x180 [ 22.981602] [<ffffffff811471f2>] do_init_module+0x60/0x1f1 [ 22.981606] [<ffffffff810db878>] load_module+0x2228/0x2790 [ 22.981608] [<ffffffff810d8590>] ? __symbol_put+0x40/0x40 [ 22.981612] [<ffffffff811c52b1>] ? kernel_read+0x41/0x60 [ 22.981614] [<ffffffff810dbfb6>] SYSC_finit_module+0x96/0xd0 [ 22.981617] [<ffffffff810dc00e>] SyS_finit_module+0xe/0x10 [ 22.981620] [<ffffffff816e7aa4>] entry_SYSCALL_64_fastpath+0x17/0x98 [ 22.981622] Code: c7 41 30 00 00 00 00 48 89 e5 48 89 3a 48 c7 c2 20 4e 40 81 e8 b2 a1 f0 ff 5d c3 48 8d 56 78 45 31 d2 48 89 d6 eb 25 48 8b 51 58 <48> 39 50 38 73 04 48 89 50 38 4c 8b 58 28 4c 39 59 48 48 8d 50 [ 22.981651] RIP [<ffffffff814050f0>] drm_mm_interval_tree_add_node+0xa0/0xd0 [ 22.981655] RSP <ffffc9000172ba98> Testcase: igt/drm_mm Fixes: 202b52b7fb ("drm: Track drm_mm nodes with an interval tree") Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: David Herrmann <dh.herrmann@gmail.com> Cc: dri-devel@lists.freedesktop.org Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: <drm-intel-fixes@lists.freedesktop.org> # v4.9-rc1+ Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/20161130205126.31106-1-chris@chris-wilson.co.uk		2016-12-01 10:35:45 +01:00
..
amd	drm/irq: Unexport drm_vblank_on/off	2016-11-15 23:33:48 +01:00
arc	drm: define drm_compat_ioctl NULL on CONFIG_COMPAT=n and reduce #ifdefs	2016-11-02 11:33:47 -04:00
arm	Merge branch 'drm-tda998x-mali' of git://git.armlinux.org.uk/~rmk/linux-arm into drm-next	2016-11-17 08:55:26 +10:00
armada	drm/armada: use DRM_FB_HELPER_DEFAULT_OPS for fb_ops	2016-11-14 07:54:13 +01:00
ast	drm/ast: free correct pointer in astfb_create() error paths	2016-11-14 07:45:16 +01:00
atmel-hlcdc	drm: define drm_compat_ioctl NULL on CONFIG_COMPAT=n and reduce #ifdefs	2016-11-02 11:33:47 -04:00
bochs	drm/bochs: use DRM_FB_HELPER_DEFAULT_OPS for fb_ops	2016-11-14 07:54:38 +01:00
bridge	drm/bridge: adv7511: Enable the audio data and clock pads on adv7533	2016-11-29 09:48:54 +05:30
cirrus	Merge tag 'topic/drm-misc-2016-11-10' of git://anongit.freedesktop.org/drm-intel into drm-next	2016-11-11 09:28:44 +10:00
etnaviv	drm: define drm_compat_ioctl NULL on CONFIG_COMPAT=n and reduce #ifdefs	2016-11-02 11:33:47 -04:00
exynos	drm/exynos: use DRM_FB_HELPER_DEFAULT_OPS for fb_ops	2016-11-14 07:54:50 +01:00
fsl-dcu	drm: define drm_compat_ioctl NULL on CONFIG_COMPAT=n and reduce #ifdefs	2016-11-02 11:33:47 -04:00
gma500	drm/gma500: use DRM_FB_HELPER_DEFAULT_OPS for fb_ops	2016-11-14 08:01:01 +01:00
hisilicon	drm/hisilicon/hibmc: mark PM functions __maybe_unused	2016-11-25 07:58:55 +01:00
i2c	Merge branch 'drm-tda998x-mali' of git://git.armlinux.org.uk/~rmk/linux-arm into drm-next	2016-11-17 08:55:26 +10:00
i810	drm: define drm_compat_ioctl NULL on CONFIG_COMPAT=n and reduce #ifdefs	2016-11-02 11:33:47 -04:00
i915	drm: Nuke modifier[1-3]	2016-11-17 11:58:09 +01:00
imx	drm/imx: Switch to drm_fb_cma_prepare_fb() helper	2016-11-15 08:25:06 +01:00
mediatek	drm/irq: Unexport drm_vblank_count	2016-11-15 23:33:47 +01:00
mga
mgag200	Merge tag 'topic/drm-misc-2016-11-10' of git://anongit.freedesktop.org/drm-intel into drm-next	2016-11-11 09:28:44 +10:00
msm	drm: Nuke modifier[1-3]	2016-11-17 11:58:09 +01:00
nouveau	Merge branch 'linux-4.10' of git://github.com/skeggsb/linux into drm-next	2016-11-17 10:08:29 +10:00
omapdrm	drm/omapdrm: use DRM_FB_HELPER_DEFAULT_OPS for fb_ops	2016-11-14 07:58:15 +01:00
panel
qxl	drm/qxl: use DRM_FB_HELPER_DEFAULT_OPS for fb_ops	2016-11-14 07:55:33 +01:00
r128
radeon	drm/radeon: use DRM_FB_HELPER_DEFAULT_OPS for fb_ops	2016-11-14 07:56:52 +01:00
rcar-du	Merge branch 'drm/next/du' of git://linuxtv.org/pinchartl/media into drm-next	2016-11-16 09:39:21 +10:00
rockchip	drm/rockchip: use DRM_FB_HELPER_DEFAULT_OPS for fb_ops	2016-11-14 07:56:47 +01:00
savage	drm: define drm_compat_ioctl NULL on CONFIG_COMPAT=n and reduce #ifdefs	2016-11-02 11:33:47 -04:00
shmobile	drm: define drm_compat_ioctl NULL on CONFIG_COMPAT=n and reduce #ifdefs	2016-11-02 11:33:47 -04:00
sis	drm: define drm_compat_ioctl NULL on CONFIG_COMPAT=n and reduce #ifdefs	2016-11-02 11:33:47 -04:00
sti	Merge tag 'topic/drm-misc-2016-11-10' of git://anongit.freedesktop.org/drm-intel into drm-next	2016-11-11 09:28:44 +10:00
sun4i	Merge tag 'drm-misc-next-2016-11-16' of git://anongit.freedesktop.org/git/drm-misc into drm-next	2016-11-17 08:02:46 +10:00
tdfx	drm: define drm_compat_ioctl NULL on CONFIG_COMPAT=n and reduce #ifdefs	2016-11-02 11:33:47 -04:00
tegra	drm/tegra: use DRM_FB_HELPER_DEFAULT_OPS for fb_ops	2016-11-14 07:56:58 +01:00
tilcdc	drm: define drm_compat_ioctl NULL on CONFIG_COMPAT=n and reduce #ifdefs	2016-11-02 11:33:47 -04:00
ttm	drm/ttm: fix ttm_bo_wait	2016-11-09 00:46:04 +05:30
udl	drm/udl: use DRM_FB_HELPER_DEFAULT_OPS for fb_ops	2016-11-14 07:57:59 +01:00
vc4	This pull request brings in fragment shader threading and ETC1 support	2016-11-17 09:43:56 +10:00
vgem	dma-buf: Rename struct fence to dma_fence	2016-10-25 14:40:39 +02:00
via	drm: define drm_compat_ioctl NULL on CONFIG_COMPAT=n and reduce #ifdefs	2016-11-02 11:33:47 -04:00
virtio	drm/virtio: use DRM_FB_HELPER_DEFAULT_OPS for fb_ops	2016-11-14 07:58:10 +01:00
vmwgfx	drm: move allocation out of drm_get_format_name()	2016-11-12 14:19:38 +01:00
zte	drm: zte: checking for NULL instead of IS_ERR()	2016-11-15 11:00:42 +01:00
ati_pcigart.c
drm_agpsupport.c
drm_atomic.c	drm: Introduce drm_framebuffer_assign()	2016-11-29 10:22:08 +01:00
drm_atomic_helper.c	drm/atomic: Unconfuse the old_state mess in commmit_tail	2016-11-22 11:11:57 +01:00
drm_auth.c
drm_blend.c	drm: RIP mode_config->rotation_property	2016-10-22 10:42:11 +02:00
drm_bridge.c
drm_bufs.c
drm_cache.c
drm_color_mgmt.c	drm/color: document NULL values and default settings better	2016-11-15 22:39:48 +01:00
drm_connector.c	drm: document standard connector properties	2016-11-18 09:45:07 +01:00
drm_context.c
drm_crtc.c	drm/fence: add out-fences support	2016-11-16 14:36:27 +01:00
drm_crtc_helper.c
drm_crtc_helper_internal.h
drm_crtc_internal.h	drm/fence: add fence timeline to drm_crtc	2016-11-16 10:42:48 +01:00
drm_debugfs.c	drm/atomic: cleanup debugfs entries on un-registering the driver.	2016-11-21 13:22:08 -05:00
drm_debugfs_crc.c	drm: fix sparse warnings on undeclared symbols in crc debugfs	2016-10-19 14:10:29 +03:00
drm_dma.c
drm_dp_aux_dev.c
drm_dp_dual_mode_helper.c	drm: Print some debug/error info during DP dual mode detect	2016-10-26 15:57:11 -04:00
drm_dp_helper.c
drm_dp_mst_topology.c	drm/dp/mst: Check peer device type before attempting EDID read	2016-10-26 18:53:44 +02:00
drm_drv.c	drm: Nerf DRM_CONTROL nodes	2016-11-17 08:41:31 +01:00
drm_dumb_buffers.c	drm: Consolidate dumb buffer docs	2016-11-15 12:51:49 +01:00
drm_edid.c	drm/edid: Consider alternate cea timings to be the same VIC	2016-11-28 18:05:57 +02:00
drm_edid_load.c
drm_encoder.c	drm: Fix locking cargo-cult in encoder/plane init/cleanup	2016-11-29 23:34:36 +01:00
drm_encoder_slave.c
drm_fb_cma_helper.c	drm/fb_cma_helper: Add drm_fb_cma_prepare_fb() helper	2016-11-14 12:43:58 +01:00
drm_fb_helper.c	drm: Protect fb_helper list manipulation with a mutex	2016-11-29 15:52:32 -05:00
drm_flip_work.c
drm_fops.c	drm: define drm_compat_ioctl NULL on CONFIG_COMPAT=n and reduce #ifdefs	2016-11-02 11:33:47 -04:00
drm_fourcc.c	drm: move allocation out of drm_get_format_name()	2016-11-12 14:19:38 +01:00
drm_framebuffer.c	drm: Nuke modifier[1-3]	2016-11-17 11:58:09 +01:00
drm_gem.c
drm_gem_cma_helper.c
drm_global.c
drm_hashtab.c
drm_info.c	drm: Print device information again in debugfs	2016-10-17 16:20:53 +10:00
drm_internal.h	drm: drm_irq.h header cleanup	2016-11-15 23:33:48 +01:00
drm_ioc32.c
drm_ioctl.c
drm_irq.c	drm/irq: Unexport drm_vblank_on/off	2016-11-15 23:33:48 +01:00
drm_kms_helper_common.c
drm_legacy.h
drm_lock.c	drm: Avoid NULL dereference for DRM_LEGACY debug message	2016-11-28 08:39:41 +01:00
drm_memory.c
drm_mipi_dsi.c
drm_mm.c	drm: Initialise drm_mm.head_node.allocated	2016-12-01 10:35:45 +01:00
drm_mode_config.c	drm/fence: add out-fences support	2016-11-16 14:36:27 +01:00
drm_mode_object.c
drm_modes.c	Revert "drm: Add aspect ratio parsing in DRM layer"	2016-11-15 15:01:42 +01:00
drm_modeset_helper.c	drm: also move DSI panels to the front of the connector list	2016-11-17 11:59:26 +01:00
drm_modeset_lock.c	drm/doc: Fix indenting in drm_modeset_lock.c comment	2016-11-29 23:34:36 +01:00
drm_of.c	drm: convert DT component matching to component_match_add_release()	2016-10-25 11:52:38 -04:00
drm_panel.c
drm_pci.c
drm_plane.c	drm: Fix locking cargo-cult in encoder/plane init/cleanup	2016-11-29 23:34:36 +01:00
drm_plane_helper.c	drm: add helpers to go from plane state to drm_rect	2016-11-08 16:38:03 -05:00
drm_platform.c
drm_prime.c
drm_print.c	drm/print: Move kerneldoc next to definition	2016-11-15 12:55:24 +01:00
drm_probe_helper.c
drm_property.c	drm: Use u64_to_user_ptr() helper for blob ioctls	2016-11-28 08:12:18 +01:00
drm_rect.c	drm: helper macros to print composite types	2016-11-08 16:38:03 -05:00
drm_scatter.c
drm_simple_kms_helper.c
drm_sysfs.c
drm_trace.h
drm_trace_points.c
drm_vm.c
drm_vma_manager.c
Kconfig	drm/fence: add in-fences support	2016-11-16 09:55:27 +01:00
Makefile	drm: Extract drm_mode_config.[hc]	2016-11-15 15:23:29 +01:00