amdgpu/dpm: NULL pointer dereference

Submitted by Adam Wolk

Assigned to Default DRI bug account

Link to original bug (#100058)

Description

Created attachment 130063
system log from multiple reboots

I noticed my external display constantly turning on and off unless a DRI app is active (ie. running DRI_PRIME=1 glxgears).
I was suggested to blacklist the radeon driver as I am using amdgpu and I proceeded to do this.

Blacklisting the driver results in the system not being able to boot.

From the first attempts I caught those 2 screenshots:
https://imgur.com/AjG7IgB,xEi2L4B
https://imgur.com/xEi2L4B

my last attempt revealed a kernel null pointer dereference that was logged in journalctl (other errors; stack traces were not logged)
https://gist.github.com/mulander/6f4d8bfc0fe73af25ee2c95014754822

I'm attaching all journalctl entries since today, search it for 'BUG' to see the boot with the null pointer dereference. It was started
with radeon blacklisted on boot.

I tried several blacklisting methods including modprobe.conf & regenerating initramfs.

[mulander@napalm ~]$ uname -a
Linux napalm 4.9.11-1-ARCH #1 (closed) SMP PREEMPT Sun Feb 19 13:45:52 UTC 2017 x86_64 GNU/Linux

[mulander@napalm ~]$ lspci
00:00.0 Host bridge: Intel Corporation Haswell-ULT DRAM Controller (rev 0b)
00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT Integrated Graphics Controller (rev 0b)
00:03.0 Audio device: Intel Corporation Haswell-ULT HD Audio Controller (rev 0b)
00:14.0 USB controller: Intel Corporation 8 Series USB xHCI HC (rev 04)
00:16.0 Communication controller: Intel Corporation 8 Series HECI #0 (rev 04)
00:1b.0 Audio device: Intel Corporation 8 Series HD Audio Controller (rev 04)
00:1c.0 PCI bridge: Intel Corporation 8 Series PCI Express Root Port 3 (rev e4)
00:1c.3 PCI bridge: Intel Corporation 8 Series PCI Express Root Port 4 (rev e4)
00:1c.4 PCI bridge: Intel Corporation 8 Series PCI Express Root Port 5 (rev e4)
00:1d.0 USB controller: Intel Corporation 8 Series USB EHCI #1 (closed) (rev 04)
00:1f.0 ISA bridge: Intel Corporation 8 Series LPC Controller (rev 04)
00:1f.2 SATA controller: Intel Corporation 8 Series SATA Controller 1 [AHCI mode] (rev 04)
00:1f.3 SMBus: Intel Corporation 8 Series SMBus Controller (rev 04)
01:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 10)
02:00.0 Network controller: Qualcomm Atheros QCA9565 / AR9565 Wireless Network Adapter (rev 01)
03:00.0 Display controller: Advanced Micro Devices, Inc. [AMD/ATI] Sun LE [Radeon HD 8550M / R5 M230]

lsmod
Module Size Used by
ctr 16384 6
ccm 20480 3
hid_generic 16384 0
usbhid 49152 0
joydev 20480 0
mousedev 20480 0
amdgpu 1499136 0
snd_hda_codec_hdmi 45056 1
amdkfd 122880 1
amd_iommu_v2 20480 1 amdkfd
intel_rapl 20480 0
x86_pkg_temp_thermal 16384 0
intel_powerclamp 16384 0
coretemp 16384 0
kvm 524288 0
radeon 1478656 4
irqbypass 16384 1 kvm
intel_cstate 16384 0
ttm 86016 2 amdgpu,radeon
intel_rapl_perf 16384 0
snd_soc_rt5640 110592 0
snd_soc_rl6231 16384 1 snd_soc_rt5640
ppdev 20480 0
snd_soc_core 188416 1 snd_soc_rt5640
snd_hda_codec_conexant 24576 1
snd_hda_codec_generic 69632 1 snd_hda_codec_conexant
snd_hda_intel 32768 7
snd_hda_codec 106496 4 snd_hda_intel,snd_hda_codec_conexant,snd_hda_codec_hdmi,snd_hda_codec_generic
snd_compress 20480 1 snd_soc_core
evdev 24576 15
snd_hda_core 65536 5 snd_hda_intel,snd_hda_codec_conexant,snd_hda_codec,snd_hda_codec_hdmi,snd_hda_codec_generic
snd_pcm_dmaengine 16384 1 snd_soc_core
snd_hwdep 16384 1 snd_hda_codec
psmouse 131072 0
ideapad_laptop 24576 0
pcspkr 16384 0
input_leds 16384 0
sparse_keymap 16384 1 ideapad_laptop
arc4 16384 2
mac_hid 16384 0
r8169 77824 0
ath9k 131072 0
ath9k_common 32768 1 ath9k
ath9k_hw 442368 2 ath9k,ath9k_common
uvcvideo 86016 0
ath 28672 3 ath9k_hw,ath9k,ath9k_common
videobuf2_vmalloc 16384 1 uvcvideo
videobuf2_memops 16384 1 videobuf2_vmalloc
ath3k 20480 0
btusb 40960 0
videobuf2_v4l2 20480 1 uvcvideo
mac80211 688128 1 ath9k
videobuf2_core 36864 2 uvcvideo,videobuf2_v4l2
btrtl 16384 1 btusb
btbcm 16384 1 btusb
btintel 16384 1 btusb
videodev 151552 3 uvcvideo,videobuf2_core,videobuf2_v4l2
rtsx_usb_ms 20480 0
bluetooth 499712 6 btrtl,btintel,btbcm,ath3k,btusb
media 32768 2 uvcvideo,videodev
memstick 16384 1 rtsx_usb_ms
snd_pcm 90112 9 snd_hda_intel,snd_hda_codec,snd_pcm_dmaengine,snd_hda_core,snd_soc_rt5640,snd_hda_codec_hdmi,snd_soc_core
cfg80211 516096 4 mac80211,ath9k,ath,ath9k_common
mii 16384 1 r8169
battery 20480 0
rfkill 20480 5 bluetooth,ideapad_laptop,cfg80211
wmi 16384 1 ideapad_laptop
ac97_bus 16384 1 snd_soc_core
i2c_hid 20480 0
hid 114688 3 i2c_hid,hid_generic,usbhid
fjes 28672 0
elan_i2c 32768 0
i915 1204224 12
parport_pc 28672 0
parport 40960 2 parport_pc,ppdev
video 36864 2 i915,ideapad_laptop
mei_me 36864 0
spi_pxa2xx_platform 24576 0
8250_dw 16384 0
i2c_designware_platform 16384 0
drm_kms_helper 126976 3 amdgpu,radeon,i915
drm 294912 13 amdgpu,radeon,i915,ttm,drm_kms_helper
snd_soc_sst_acpi 16384 0
intel_gtt 20480 1 i915
snd_soc_sst_match 16384 1 snd_soc_sst_acpi
syscopyarea 16384 1 drm_kms_helper
sysfillrect 16384 1 drm_kms_helper
sysimgblt 16384 1 drm_kms_helper
fb_sys_fops 16384 1 drm_kms_helper
i2c_algo_bit 16384 3 amdgpu,radeon,i915
snd_timer 28672 1 snd_pcm
snd 69632 22 snd_compress,snd_hda_intel,snd_hwdep,snd_hda_codec_conexant,snd_hda_codec,snd_timer,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_soc_core,snd_pcm
lpc_ich 24576 0
mei 86016 1 mei_me
shpchp 32768 0
soc_button_array 16384 0
i2c_i801 24576 0
i2c_designware_core 20480 1 i2c_designware_platform
i2c_smbus 16384 1 i2c_i801
soundcore 16384 1 snd
tpm_tis 16384 0
tpm_tis_core 20480 1 tpm_tis
tpm 36864 2 tpm_tis,tpm_tis_core
ac 16384 0
button 16384 1 i915
sch_fq_codel 20480 5
ip_tables 28672 0
x_tables 28672 1 ip_tables
ext4 528384 3
crc16 16384 2 bluetooth,ext4
jbd2 90112 1 ext4
fscrypto 24576 1 ext4
mbcache 16384 4 ext4
algif_skcipher 20480 0
af_alg 16384 1 algif_skcipher
dm_crypt 28672 1
dm_mod 106496 12 dm_crypt
sr_mod 24576 0
sd_mod 36864 3
cdrom 53248 1 sr_mod
rtsx_usb_sdmmc 28672 0
rtsx_usb 20480 2 rtsx_usb_sdmmc,rtsx_usb_ms
serio_raw 16384 0
atkbd 24576 0
libps2 16384 2 atkbd,psmouse
crct10dif_pclmul 16384 0
crc32_pclmul 16384 0
crc32c_intel 24576 0
ghash_clmulni_intel 16384 0
ahci 36864 2
libahci 28672 1 ahci
aesni_intel 167936 9
xhci_pci 16384 0
aes_x86_64 20480 1 aesni_intel
lrw 16384 1 aesni_intel
xhci_hcd 172032 1 xhci_pci
gf128mul 16384 1 lrw
glue_helper 16384 1 aesni_intel
ablk_helper 16384 1 aesni_intel
cryptd 20480 4 ablk_helper,ghash_clmulni_intel,aesni_intel
libata 212992 2 ahci,libahci
ehci_pci 16384 0
ehci_hcd 73728 1 ehci_pci
usbcore 208896 9 uvcvideo,usbhid,ehci_hcd,xhci_pci,rtsx_usb,ath3k,btusb,xhci_hcd,ehci_pci
scsi_mod 159744 3 sd_mod,libata,sr_mod
usb_common 16384 1 usbcore
i8042 28672 1 ideapad_laptop
serio 20480 6 serio_raw,atkbd,psmouse,i8042
sdhci_acpi 16384 0
sdhci 40960 1 sdhci_acpi
led_class 16384 4 rtsx_usb_sdmmc,sdhci,input_leds,ath9k
mmc_core 122880 3 rtsx_usb_sdmmc,sdhci,sdhci_acpi

Attachment 130063, "system log from multiple reboots":
journalctl.txt