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
..
accessibility
acpi	Merge branches 'acpica-fixes', 'acpi-pci-fixes' and 'acpi-apei-fixes'	2016-10-29 01:58:03 +02:00
amba
android	ANDROID: binder: Clear binder and cookie when setting handle in flat binder struct	2016-10-24 19:37:48 +02:00
ata	ahci: fix the single MSI-X case in ahci_init_one	2016-10-25 11:43:07 -04:00
atm	atm: iphase: fix newline escape and minor tweak to source formatting	2016-09-15 19:15:55 -04:00
auxdisplay	auxdisplay: img-ascii-lcd: driver for simple ASCII LCD displays	2016-10-06 17:03:41 +02:00
base	Linux 4.9-rc4	2016-11-07 09:37:09 +10:00
bcma
block	virtio_blk: Delete an unnecessary initialisation in init_vq()	2016-10-31 00:21:47 +02:00
bluetooth	Bluetooth: btwilink: Fix probe return value	2016-10-20 10:14:49 +02:00
bus	bus: qcom-ebi2: depend on ARCH_QCOM or COMPILE_TEST	2016-10-17 13:46:09 -07:00
cdrom
char	virtio: tests, fixes and cleanups	2016-11-01 16:56:05 -06:00
clk	clk: at91: Fix a return value in case of error	2016-10-20 16:37:56 -07:00
clocksource	Revert "clocksource/drivers/timer_sun5i: Replace code by clocksource_mmio_init"	2016-10-20 21:58:58 +02:00
connector
cpufreq	Merge branches 'pm-cpufreq-fixes' and 'pm-sleep-fixes'	2016-10-29 01:29:17 +02:00
cpuidle	Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus	2016-10-15 09:26:12 -07:00
crypto	Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2016-10-10 14:04:16 -07:00
dax	device-dax: fix percpu_ref_exit ordering	2016-10-27 17:04:05 -07:00
dca
devfreq	PM / devfreq: Skip status update on uninitialized previous_freq	2016-10-11 00:01:20 +02:00
dio
dma	dmaengine updates for 4.8-rc1	2016-10-06 17:13:54 -07:00
dma-buf	Revert "dma-buf/sync-file: Avoid enable fence signaling if poll(.timeout=0)"	2016-11-18 10:35:58 +01:00
edac	* Altera Arria10 enablement of NAND, DMA, USB, QSPI and SD-MMC FIFO	2016-10-04 12:06:26 -07:00
eisa
extcon	extcon: qcom-spmi-misc: Sync the extcon state on interrupt	2016-10-26 16:04:29 +09:00
firewire	firewire: net: fix fragmented datagram_size off-by-one	2016-11-03 14:46:39 +01:00
firmware	efi/arm: Fix absolute relocation detection for older toolchains	2016-10-19 14:49:44 +02:00
fmc
fpga
gpio	gpio/mvebu: Use irq_domain_add_linear	2016-11-01 19:31:49 +01:00
gpu	drm: Initialise drm_mm.head_node.allocated	2016-12-01 10:35:45 +01:00
hid	HID: add quirk for Akai MIDImix.	2016-10-10 10:58:22 +02:00
hsi
hv	hv: do not lose pending heartbeat vmbus packets	2016-10-25 08:52:10 +02:00
hwmon	hwmon: (max31790) potential ERR_PTR dereference	2016-10-17 10:16:20 -07:00
hwspinlock
hwtracing
i2c	i2c: core: fix NULL pointer dereference under race condition	2016-11-04 20:36:58 +01:00
ide
idle	nmi_backtrace: generate one-line reports for idle cpus	2016-10-07 18:46:30 -07:00
iio	First set of IIO fixes for the 4.9 cycle.	2016-10-24 10:50:13 +02:00
infiniband	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-10-29 20:33:20 -07:00
input	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2016-11-05 11:26:11 -07:00
iommu	IOMMU Updates for Linux v4.9	2016-10-11 12:52:41 -07:00
ipack	ipack: print a hex number after a 0x prefix	2016-10-27 18:43:43 -07:00
irqchip	GIC updates for Linux 4.9-rc2	2016-10-21 21:40:29 +02:00
isdn
leds	leds: triggers: Check return value of kobject_uevent_env()	2016-09-20 10:22:10 +02:00
lguest
lightnvm	Merge branch 'for-4.9/block' of git://git.kernel.dk/linux-block	2016-10-07 14:42:05 -07:00
macintosh	powerpc: Remove all usages of NO_IRQ	2016-09-20 20:57:12 +10:00
mailbox	Merge branch 'mailbox-for-next' of git://git.linaro.org/landing-teams/working/fujitsu/integration	2016-10-06 17:36:53 -07:00
mcb	mcb: Add a dma_device to mcb_device	2016-09-27 12:33:47 +02:00
md	Merge tag 'md/4.9-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md	2016-11-05 11:34:07 -07:00
media	media fixes for v4.9-rc4	2016-11-05 11:15:09 -07:00
memory	ARM: SoC driver updates for v4.9	2016-10-07 21:23:40 -07:00
memstick	memstick: rtsx_usb_ms: Manage runtime PM when accessing the device	2016-10-17 15:43:05 +02:00
message
mfd	- Core Frameworks	2016-10-07 08:35:35 -07:00
misc	Char/Misc driver fixes for 4.9-rc3	2016-10-29 11:19:02 -07:00
mmc	mmc: sdhci-msm: Fix error return code in sdhci_msm_probe()	2016-10-27 09:43:01 +02:00
mtd	MTD updates for 4.9-rc4:	2016-11-05 10:52:29 -07:00
net	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-10-29 20:33:20 -07:00
nfc
ntb
nubus
nvdimm	nvdimm: make CONFIG_NVDIMM_DAX 'bool'	2016-10-27 16:16:21 -07:00
nvme	Merge branch 'for-linus' of git://git.kernel.dk/linux-block	2016-10-21 10:54:01 -07:00
nvmem	ARM: SoC driver updates for v4.9	2016-10-07 21:23:40 -07:00
of	Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus	2016-10-15 09:26:12 -07:00
oprofile	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2016-10-10 20:16:43 -07:00
parisc
parport
pci	pci-v4.9-fixes-2	2016-11-05 11:11:31 -07:00
pcmcia	pcmcia: soc_common: add driver-data pointer	2016-09-22 09:39:16 +01:00
perf	perf: xgene: Remove bogus IS_ERR() check	2016-10-17 15:50:07 +01:00
phy
pinctrl	pinctrl: intel: Only restore pins that are used by the driver	2016-10-18 14:38:16 +02:00
platform	platform-drivers-x86 for 4.9-2	2016-10-19 11:45:06 -07:00
pnp
power	power supply and reset changes for the v4.9 series	2016-10-06 18:21:15 -07:00
powercap
pps	pps: kc: fix non-tickless system config dependency	2016-10-11 15:06:32 -07:00
ps3	powerpc: Remove all usages of NO_IRQ	2016-09-20 20:57:12 +10:00
ptp	drivers/ptp: Fix kernel memory disclosure	2016-10-13 10:20:06 -04:00
pwm
rapidio	mm: replace get_user_pages() write/force parameters with gup_flags	2016-10-19 08:11:43 -07:00
ras
regulator	regulator: core: silence warning: "VDD1: ramp_delay not set"	2016-10-28 18:22:40 +01:00
remoteproc	rpmsg updates for v4.9	2016-10-06 17:03:49 -07:00
reset	reset: uniphier: rename MIO reset to SD reset for Pro5, PXs2, LD20 SoCs	2016-10-22 18:31:42 +09:00
rpmsg
rtc	RTC for 4.9	2016-10-14 13:13:44 -07:00
s390	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux	2016-10-27 14:16:30 -07:00
sbus
scsi	SCSI fixes on 20161105	2016-11-05 11:28:21 -07:00
sfi
sh
sn
soc	powerpc updates for 4.9 #2	2016-10-14 11:07:42 -07:00
spi	Merge remote-tracking branches 'spi/fix/dt', 'spi/fix/fsl-dspi' and 'spi/fix/fsl-espi' into spi-linus	2016-10-29 12:51:55 -06:00
spmi	spmi: pmic-arb: Return an error code if sanity check fails	2016-09-27 12:43:34 +02:00
ssb
staging	media fixes for v4.9-rc4	2016-11-05 11:15:09 -07:00
target	target/tcm_fc: use CPU affinity for responses	2016-10-21 01:19:44 -07:00
tc
thermal	thermal/powerclamp: correct cpu support check	2016-10-20 14:15:44 +08:00
thunderbolt
tty	tty: serial_core: fix NULL struct tty pointer access in uart_write_wakeup	2016-10-28 08:13:07 -04:00
uio
usb	usb: chipidea: host: fix NULL ptr dereference during shutdown	2016-10-25 16:14:32 +08:00
uwb
vfio	vfio/pci: Fix integer overflows, bitmask check	2016-10-26 13:49:29 -06:00
vhost
video	Merge branch 'drm/next/du' of git://linuxtv.org/pinchartl/media into drm-next	2016-11-16 09:39:21 +10:00
virt	mm: replace get_user_pages() write/force parameters with gup_flags	2016-10-19 08:11:43 -07:00
virtio	virtio_ring: mark vring_dma_dev inline	2016-10-31 00:40:08 +02:00
vlynq
vme	vme: vme_get_size potentially returning incorrect value on failure	2016-10-28 08:25:18 -04:00
w1
watchdog	Merge branches 'acpi-wdat' and 'acpi-cppc'	2016-10-21 22:24:23 +02:00
xen	xen: fixes for 4.9-rc2	2016-10-24 19:52:24 -07:00
zorro
Kconfig
Makefile	A small bug fix and a new driver for acting as an IPMI device.	2016-10-23 15:56:23 -07:00