Info

Permalink
Function
__warn
First occurrence
2020-09-27
Last occurrence
2026-09-11
State
NEW
Components
kernel Tainted
Quality
-85

Graphs

Statistics

Operating system Count
CentOS 7 11,119
CentOS 8 768
Architecture Count
x86_64 11,887
Related packages Count
kernel 11,885
 0:3.10.0-1160.el7 5,448
 0:3.10.0-1160.119.1.el7 1,377
 0:3.10.0-1160.76.1.el7 876
 0:3.10.0-1160.21.1.el7 770
 0:3.10.0-1160.42.2.el7 684
 0:3.10.0-1127.el7 657
 0:3.10.0-1160.108.1.el7 628
 0:3.10.0-1160.71.1.el7 201
 0:3.10.0-1160.25.1.el7 173
 0:3.10.0-1160.6.1.el7 160
 0:3.10.0-1160.49.1.el7 132
 0:3.10.0-1160.31.1.el7 120
 0:3.10.0-1160.36.2.el7 111
 0:3.10.0-1062.el7 65
 0:3.10.0-1160.45.1.el7 61
 0:3.10.0-1160.88.1.el7 56
 0:3.10.0-1160.95.1.el7 47
 0:3.10.0-1127.19.1.el7 41
 0:3.10.0-1062.9.1.el7 37
 0:3.10.0-1160.53.1.el7 36
 0:3.10.0-1160.81.1.el7 36
 0:3.10.0-1160.99.1.el7 27
 0:3.10.0-1127.18.2.el7 22
 0:3.10.0-1160.59.1.el7 20
 0:3.10.0-1160.114.2.el7 15
 0:3.10.0-1160.66.1.el7 13
 0:3.10.0-1160.90.1.el7 13
 0:3.10.0-1160.105.1.el7 9
 0:3.10.0-1160.102.1.el7 8
 0:3.10.0-1160.24.1.el7 6
 0:3.10.0-1062.4.1.el7 5
 0:3.10.0-1160.62.1.el7 5
 0:3.10.0-1062.12.1.el7 5
 0:3.10.0-1160.11.1.el7 5
 0:3.10.0-1160.2.2.el7 4
 0:3.10.0-1160.83.1.el7 4
 0:3.10.0-1160.118.1.el7 3
 0:3.10.0-1160.92.1.el7 2
 0:3.10.0-1062.18.1.el7 1
 0:3.10.0-1062.4.3.el7 1
 0:3.10.0-1160.15.2.el7 1
kernel-debug 2
 0:3.10.0-1160.21.1.el7 2

Packages names with count less than the total count of reports are most probably not the cause of the problem.

History

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No reports in the last 20 days.

Report backtrace


Complete report #2706
Frame # Function Binary Source or offset Line
1
dump_stack
vmlinux 0xffffffff92b7ac23
Build id: 3.10.0-1062.9.1.el7.x86_64
0x19
2
__warn
vmlinux 0xffffffff9249b958
Build id: 3.10.0-1062.9.1.el7.x86_64
0xd8
3
warn_slowpath_fmt
vmlinux 0xffffffff9249b9df
Build id: 3.10.0-1062.9.1.el7.x86_64
0x5f
4
nvkm_pmu_reset
nouveau 0xffffffffc047ea2e
Build id: 3.10.0-1062.9.1.el7.x86_64
0x18e
5
nvkm_pmu_init
nouveau 0xffffffffc047ea5b
Build id: 3.10.0-1062.9.1.el7.x86_64
0x1b
6
nvkm_subdev_init
nouveau 0xffffffffc04236a1
Build id: 3.10.0-1062.9.1.el7.x86_64
0xf1
7
nvkm_device_init
nouveau 0xffffffffc048df83
Build id: 3.10.0-1062.9.1.el7.x86_64
0x193
8
nvkm_udevice_init
nouveau 0xffffffffc0492e18
Build id: 3.10.0-1062.9.1.el7.x86_64
0x48
9
nvkm_object_init
nouveau 0xffffffffc0421eb3
Build id: 3.10.0-1062.9.1.el7.x86_64
0x53
10
nvkm_object_init
nouveau 0xffffffffc0421ef5
Build id: 3.10.0-1062.9.1.el7.x86_64
0x95
11
nvkm_object_init
nouveau 0xffffffffc0421ef5
Build id: 3.10.0-1062.9.1.el7.x86_64
0x95
12
nvkm_client_resume
nouveau 0xffffffffc04e29ee
Build id: 3.10.0-1062.9.1.el7.x86_64
0xe
13
nvif_client_resume
nouveau 0xffffffffc041c87a
Build id: 3.10.0-1062.9.1.el7.x86_64
0x1a
14
nouveau_do_resume
nouveau 0xffffffffc04e095d
Build id: 3.10.0-1062.9.1.el7.x86_64
0x2d
15
nouveau_pmops_runtime_resume
nouveau 0xffffffffc04e144c
Build id: 3.10.0-1062.9.1.el7.x86_64
0x8c
16
pci_pm_runtime_resume
vmlinux 0xffffffff927d1620
Build id: 3.10.0-1062.9.1.el7.x86_64
0x80
17
__rpm_callback
vmlinux 0xffffffff928c05b6
Build id: 3.10.0-1062.9.1.el7.x86_64
0x36
18
rpm_callback
vmlinux 0xffffffff928c0624
Build id: 3.10.0-1062.9.1.el7.x86_64
0x24
19
rpm_resume
vmlinux 0xffffffff928c15b9
Build id: 3.10.0-1062.9.1.el7.x86_64
0x4b9
20
__pm_runtime_resume
vmlinux 0xffffffff928c178f
Build id: 3.10.0-1062.9.1.el7.x86_64
0x4f
21
nouveau_drm_open
nouveau 0xffffffffc04e223d
Build id: 3.10.0-1062.9.1.el7.x86_64
0x3d
22
? kmem_cache_alloc_trace
vmlinux 0xffffffff92625286
Build id: 3.10.0-1062.9.1.el7.x86_64
0x1d6
23
drm_file_alloc
drm 0xffffffffc03543cd
Build id: 3.10.0-1062.9.1.el7.x86_64
0x16d
24
drm_open
drm 0xffffffffc0354898
Build id: 3.10.0-1062.9.1.el7.x86_64
0xa8
25
drm_stub_open
drm 0xffffffffc0358ab2
Build id: 3.10.0-1062.9.1.el7.x86_64
0xb2
26
chrdev_open
vmlinux 0xffffffff9264ff45
Build id: 3.10.0-1062.9.1.el7.x86_64
0xb5
27
do_dentry_open
vmlinux 0xffffffff926480b6
Build id: 3.10.0-1062.9.1.el7.x86_64
0x216
28
? security_inode_permission
vmlinux 0xffffffff92704262
Build id: 3.10.0-1062.9.1.el7.x86_64
0x22
29
? cdev_put
vmlinux 0xffffffff9264fe90
Build id: 3.10.0-1062.9.1.el7.x86_64
0x30
30
vfs_open
vmlinux 0xffffffff926481fa
Build id: 3.10.0-1062.9.1.el7.x86_64
0x5a
31
? may_open
vmlinux 0xffffffff92656843
Build id: 3.10.0-1062.9.1.el7.x86_64
0xa3
32
do_last
vmlinux 0xffffffff92658f26
Build id: 3.10.0-1062.9.1.el7.x86_64
0x1f6
33
? xfs_file_buffered_aio_write
xfs 0xffffffffc08a4528
Build id: 3.10.0-1062.9.1.el7.x86_64
0x298
34
path_openat
vmlinux 0xffffffff9265bdbd
Build id: 3.10.0-1062.9.1.el7.x86_64
0xcd
35
do_filp_open
vmlinux 0xffffffff9265d72d
Build id: 3.10.0-1062.9.1.el7.x86_64
0x4d
36
? __alloc_fd
vmlinux 0xffffffff9266b207
Build id: 3.10.0-1062.9.1.el7.x86_64
0x47
37
do_sys_open
vmlinux 0xffffffff92649684
Build id: 3.10.0-1062.9.1.el7.x86_64
0x124
38
SyS_open
vmlinux 0xffffffff9264979e
Build id: 3.10.0-1062.9.1.el7.x86_64
0x1e
39
system_call_fastpath
vmlinux 0xffffffff92b8dede
Build id: 3.10.0-1062.9.1.el7.x86_64
0x25
WARNING: CPU: 1 PID: 2019 at drivers/gpu/drm/nouveau/nvkm/subdev/pmu/base.c:86 nvkm_pmu_reset+0x18e/0x1a0 [nouveau]
Device: nouveau#012timeout
Modules linked in: bnep snd_hda_codec_hdmi arc4 iwlmvm mac80211 hid_multitouch dell_led snd_soc_skl snd_soc_skl_ipc snd_hda_codec_realtek snd_hda_ext_core vfat snd_soc_sst_dsp snd_soc_sst_ipc fat snd_soc_acpi snd_soc_core iTCO_wdt snd_hda_codec_generic iTCO_vendor_support intel_pmc_core snd_compress dell_laptop intel_powerclamp coretemp intel_rapl kvm_intel kvm ext4 irqbypass crc32_pclmul iwlwifi snd_hda_intel ghash_clmulni_intel snd_hda_codec snd_hda_core snd_hwdep snd_seq mbcache jbd2 snd_seq_device aesni_intel snd_pcm lrw gf128mul dell_wmi btusb glue_helper ablk_helper dell_smbios uvcvideo cryptd dcdbas btrtl btbcm btintel joydev snd_timer videobuf2_vmalloc pcspkr videobuf2_memops dell_wmi_descriptor bluetooth videobuf2_core cfg80211 snd videodev i2c_i801 soundcore sg i2c_designware_platform
idma64 i2c_designware_core rfkill virt_dma dell_smo8800 pinctrl_cannonlake pinctrl_intel pcc_cpufreq intel_hid int3400_thermal acpi_pad sparse_keymap auth_rpcgss sunrpc binfmt_misc ip_tables xfs libcrc32c sd_mod crc_t10dif crct10dif_generic i915 nouveau mxm_wmi ttm iosf_mbi i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops ahci libahci drm libata crct10dif_pclmul crct10dif_common crc32c_intel nvme serio_raw nvme_core r8169 drm_panel_orientation_quirks wmi video i2c_hid dm_mirror dm_region_hash dm_log dm_mod
CPU: 1 PID: 2019 Comm: X Tainted: G        W      ------------   3.10.0-1062.9.1.el7.x86_64 #1
Hardware name: Dell Inc. Inspiron 5480/0F02M4, BIOS 2.2.0 03/24/2019
Call Trace:
[<ffffffff92b7ac23>] dump_stack+0x19/0x1b
[<ffffffff9249b958>] __warn+0xd8/0x100
[<ffffffff9249b9df>] warn_slowpath_fmt+0x5f/0x80
[<ffffffffc047ea2e>] nvkm_pmu_reset+0x18e/0x1a0 [nouveau]
[<ffffffffc047ea5b>] nvkm_pmu_init+0x1b/0x40 [nouveau]
[<ffffffffc04236a1>] nvkm_subdev_init+0xf1/0x230 [nouveau]
[<ffffffffc048df83>] nvkm_device_init+0x193/0x2a0 [nouveau]
[<ffffffffc0492e18>] nvkm_udevice_init+0x48/0x60 [nouveau]
[<ffffffffc0421eb3>] nvkm_object_init+0x53/0x1c0 [nouveau]
[<ffffffffc0421ef5>] nvkm_object_init+0x95/0x1c0 [nouveau]
[<ffffffffc0421ef5>] nvkm_object_init+0x95/0x1c0 [nouveau]
[<ffffffffc04e29ee>] nvkm_client_resume+0xe/0x10 [nouveau]
[<ffffffffc041c87a>] nvif_client_resume+0x1a/0x20 [nouveau]
[<ffffffffc04e095d>] nouveau_do_resume+0x2d/0x160 [nouveau]
[<ffffffffc04e144c>] nouveau_pmops_runtime_resume+0x8c/0x160 [nouveau]
[<ffffffff927d1620>] pci_pm_runtime_resume+0x80/0xc0
[<ffffffff928c05b6>] __rpm_callback+0x36/0x80
[<ffffffff928c0624>] rpm_callback+0x24/0x80
[<ffffffff928c15b9>] rpm_resume+0x4b9/0x640
[<ffffffff928c178f>] __pm_runtime_resume+0x4f/0x90
[<ffffffffc04e223d>] nouveau_drm_open+0x3d/0x180 [nouveau]
[<ffffffff92625286>] ? kmem_cache_alloc_trace+0x1d6/0x200
[<ffffffffc03543cd>] drm_file_alloc+0x16d/0x290 [drm]
[<ffffffffc0354898>] drm_open+0xa8/0x220 [drm]
[<ffffffffc0358ab2>] drm_stub_open+0xb2/0x120 [drm]
[<ffffffff9264ff45>] chrdev_open+0xb5/0x1b0
[<ffffffff926480b6>] do_dentry_open+0x216/0x2c0
[<ffffffff92704262>] ? security_inode_permission+0x22/0x30
[<ffffffff9264fe90>] ? cdev_put+0x30/0x30
[<ffffffff926481fa>] vfs_open+0x5a/0xb0
[<ffffffff92656843>] ? may_open+0xa3/0x120
[<ffffffff92658f26>] do_last+0x1f6/0x1290
[<ffffffffc08a4528>] ? xfs_file_buffered_aio_write+0x298/0x2c0 [xfs]
[<ffffffff9265bdbd>] path_openat+0xcd/0x5a0
[<ffffffff9265d72d>] do_filp_open+0x4d/0xb0
[<ffffffff9266b207>] ? __alloc_fd+0x47/0x170
[<ffffffff92649684>] do_sys_open+0x124/0x220
[<ffffffff9264979e>] SyS_open+0x1e/0x20
[<ffffffff92b8dede>] system_call_fastpath+0x25/0x2a
Complete report #13778
Frame # Function Binary Source or offset Line
1
dump_stack
vmlinux 0xffffffffba37ff85
Build id: 3.10.0-1127.el7.x86_64
0x19
2
__warn
vmlinux 0xffffffffb9c9bd18
Build id: 3.10.0-1127.el7.x86_64
0xd8
3
warn_slowpath_fmt
vmlinux 0xffffffffb9c9bd9f
Build id: 3.10.0-1127.el7.x86_64
0x5f
4
g84_bar_flush
nouveau 0xffffffffc03c618e
Build id: 3.10.0-1127.el7.x86_64
0xee
5
nvkm_bar_flush
nouveau 0xffffffffc03c572f
Build id: 3.10.0-1127.el7.x86_64
0x1f
6
nv50_instobj_release
nouveau 0xffffffffc040baae
Build id: 3.10.0-1127.el7.x86_64
0x2e
7
nvkm_instobj_load
nouveau 0xffffffffc040a682
Build id: 3.10.0-1127.el7.x86_64
0x52
8
nvkm_instmem_init
nouveau 0xffffffffc040a727
Build id: 3.10.0-1127.el7.x86_64
0x37
9
nvkm_subdev_init
nouveau 0xffffffffc03c26a1
Build id: 3.10.0-1127.el7.x86_64
0xf1
10
nvkm_device_init
nouveau 0xffffffffc042cf83
Build id: 3.10.0-1127.el7.x86_64
0x193
11
nvkm_udevice_init
nouveau 0xffffffffc0431e18
Build id: 3.10.0-1127.el7.x86_64
0x48
12
nvkm_object_init
nouveau 0xffffffffc03c0eb3
Build id: 3.10.0-1127.el7.x86_64
0x53
13
nvkm_object_init
nouveau 0xffffffffc03c0ef5
Build id: 3.10.0-1127.el7.x86_64
0x95
14
nvkm_object_init
nouveau 0xffffffffc03c0ef5
Build id: 3.10.0-1127.el7.x86_64
0x95
15
nvkm_client_resume
nouveau 0xffffffffc04819ee
Build id: 3.10.0-1127.el7.x86_64
0xe
16
nvif_client_resume
nouveau 0xffffffffc03bb87a
Build id: 3.10.0-1127.el7.x86_64
0x1a
17
nouveau_do_resume
nouveau 0xffffffffc047f95d
Build id: 3.10.0-1127.el7.x86_64
0x2d
18
nouveau_pmops_runtime_resume
nouveau 0xffffffffc048044c
Build id: 3.10.0-1127.el7.x86_64
0x8c
19
pci_pm_runtime_resume
vmlinux 0xffffffffb9fd51a0
Build id: 3.10.0-1127.el7.x86_64
0x80
20
__rpm_callback
vmlinux 0xffffffffba0c4346
Build id: 3.10.0-1127.el7.x86_64
0x36
21
rpm_callback
vmlinux 0xffffffffba0c43b4
Build id: 3.10.0-1127.el7.x86_64
0x24
22
rpm_resume
vmlinux 0xffffffffba0c5349
Build id: 3.10.0-1127.el7.x86_64
0x4b9
23
? wake_up_atomic_t
vmlinux 0xffffffffb9cc7780
Build id: 3.10.0-1127.el7.x86_64
0x30
24
__pm_runtime_resume
vmlinux 0xffffffffba0c551f
Build id: 3.10.0-1127.el7.x86_64
0x4f
25
nouveau_drm_open
nouveau 0xffffffffc048123d
Build id: 3.10.0-1127.el7.x86_64
0x3d
26
? selinux_capable
vmlinux 0xffffffffb9f0db3e
Build id: 3.10.0-1127.el7.x86_64
0x2e
27
drm_file_alloc
drm 0xffffffffc02bf3cd
Build id: 3.10.0-1127.el7.x86_64
0x16d
28
drm_open
drm 0xffffffffc02bf898
Build id: 3.10.0-1127.el7.x86_64
0xa8
29
drm_stub_open
drm 0xffffffffc02c3ab2
Build id: 3.10.0-1127.el7.x86_64
0xb2
30
chrdev_open
vmlinux 0xffffffffb9e527b5
Build id: 3.10.0-1127.el7.x86_64
0xb5
31
do_dentry_open
vmlinux 0xffffffffb9e4a872
Build id: 3.10.0-1127.el7.x86_64
0x1e2
32
? security_inode_permission
vmlinux 0xffffffffb9f07932
Build id: 3.10.0-1127.el7.x86_64
0x22
33
? cdev_put
vmlinux 0xffffffffb9e52700
Build id: 3.10.0-1127.el7.x86_64
0x30
34
vfs_open
vmlinux 0xffffffffb9e4a9fa
Build id: 3.10.0-1127.el7.x86_64
0x5a
35
? may_open
vmlinux 0xffffffffb9e590c3
Build id: 3.10.0-1127.el7.x86_64
0xa3
36
do_last
vmlinux 0xffffffffb9e5cfa6
Build id: 3.10.0-1127.el7.x86_64
0x1f6
37
? kmem_cache_alloc_trace
vmlinux 0xffffffffb9e289f6
Build id: 3.10.0-1127.el7.x86_64
0x1d6
38
path_openat
vmlinux 0xffffffffb9e5e1bd
Build id: 3.10.0-1127.el7.x86_64
0xcd
39
do_filp_open
vmlinux 0xffffffffb9e6040d
Build id: 3.10.0-1127.el7.x86_64
0x4d
40
? __alloc_fd
vmlinux 0xffffffffb9e6e437
Build id: 3.10.0-1127.el7.x86_64
0x47
41
do_sys_open
vmlinux 0xffffffffb9e4bfe4
Build id: 3.10.0-1127.el7.x86_64
0x124
42
SyS_open
vmlinux 0xffffffffb9e4c0fe
Build id: 3.10.0-1127.el7.x86_64
0x1e
43
system_call_fastpath
vmlinux 0xffffffffba392ed2
Build id: 3.10.0-1127.el7.x86_64
0x25
WARNING: CPU: 0 PID: 1457 at drivers/gpu/drm/nouveau/nvkm/subdev/bar/g84.c:38 g84_bar_flush+0xee/0x100 [nouveau]
Device: nouveau#012timeout
Modules linked in: ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 ipt_REJECT nf_reject_ipv4 xt_conntrack ebtable_nat ebtable_broute bridge stp llc ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat iptable_mangle iptable_security iptable_raw nf_conntrack ip_set nfnetlink ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter bnep sunrpc arc4 iwlmvm vfat fat mac80211 intel_pmc_core iwlwifi snd_hda_codec_hdmi snd_hda_codec_realtek iTCO_wdt snd_hda_codec_generic iTCO_vendor_support intel_powerclamp coretemp intel_rapl kvm_intel kvm snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_seq irqbypass crc32_pclmul snd_seq_device ghash_clmulni_intel snd_pcm btusb aesni_intel
cfg80211 btrtl btbcm lrw btintel gf128mul glue_helper ablk_helper cryptd bluetooth snd_timer joydev snd pcspkr intel_wmi_thunderbolt msi_wmi soundcore sparse_keymap i2c_i801 sg rfkill mei_me mei pinctrl_sunrisepoint pinctrl_intel acpi_pad ip_tables xfs libcrc32c sd_mod sr_mod cdrom crc_t10dif crct10dif_generic rtsx_usb_sdmmc mmc_core rtsx_usb i915 nouveau ttm i2c_algo_bit iosf_mbi drm_kms_helper syscopyarea sysfillrect mxm_wmi sysimgblt ahci fb_sys_fops libahci drm libata crct10dif_pclmul crct10dif_common nvme crc32c_intel nvme_core serio_raw alx mdio drm_panel_orientation_quirks wmi video i2c_hid dm_mirror dm_region_hash dm_log dm_mod
CPU: 0 PID: 1457 Comm: Xorg Tainted: G        W      ------------   3.10.0-1127.el7.x86_64 #1
Hardware name: Micro-Star International Co., Ltd. GE72 6QD/MS-1795, BIOS E1795IMS.11D 01/19/2018
Call Trace:
[<ffffffffba37ff85>] dump_stack+0x19/0x1b
[<ffffffffb9c9bd18>] __warn+0xd8/0x100
[<ffffffffb9c9bd9f>] warn_slowpath_fmt+0x5f/0x80
[<ffffffffc03c618e>] g84_bar_flush+0xee/0x100 [nouveau]
[<ffffffffc03c572f>] nvkm_bar_flush+0x1f/0x30 [nouveau]
[<ffffffffc040baae>] nv50_instobj_release+0x2e/0x90 [nouveau]
[<ffffffffc040a682>] nvkm_instobj_load+0x52/0xc0 [nouveau]
[<ffffffffc040a727>] nvkm_instmem_init+0x37/0x90 [nouveau]
[<ffffffffc03c26a1>] nvkm_subdev_init+0xf1/0x230 [nouveau]
[<ffffffffc042cf83>] nvkm_device_init+0x193/0x2a0 [nouveau]
[<ffffffffc0431e18>] nvkm_udevice_init+0x48/0x60 [nouveau]
[<ffffffffc03c0eb3>] nvkm_object_init+0x53/0x1c0 [nouveau]
[<ffffffffc03c0ef5>] nvkm_object_init+0x95/0x1c0 [nouveau]
[<ffffffffc03c0ef5>] nvkm_object_init+0x95/0x1c0 [nouveau]
[<ffffffffc04819ee>] nvkm_client_resume+0xe/0x10 [nouveau]
[<ffffffffc03bb87a>] nvif_client_resume+0x1a/0x20 [nouveau]
[<ffffffffc047f95d>] nouveau_do_resume+0x2d/0x160 [nouveau]
[<ffffffffc048044c>] nouveau_pmops_runtime_resume+0x8c/0x160 [nouveau]
[<ffffffffb9fd51a0>] pci_pm_runtime_resume+0x80/0xc0
[<ffffffffba0c4346>] __rpm_callback+0x36/0x80
[<ffffffffba0c43b4>] rpm_callback+0x24/0x80
[<ffffffffba0c5349>] rpm_resume+0x4b9/0x640
[<ffffffffb9cc7780>] ? wake_up_atomic_t+0x30/0x30
[<ffffffffba0c551f>] __pm_runtime_resume+0x4f/0x90
[<ffffffffc048123d>] nouveau_drm_open+0x3d/0x180 [nouveau]
[<ffffffffb9f0db3e>] ? selinux_capable+0x2e/0x40
[<ffffffffc02bf3cd>] drm_file_alloc+0x16d/0x290 [drm]
[<ffffffffc02bf898>] drm_open+0xa8/0x220 [drm]
[<ffffffffc02c3ab2>] drm_stub_open+0xb2/0x120 [drm]
[<ffffffffb9e527b5>] chrdev_open+0xb5/0x1b0
[<ffffffffb9e4a872>] do_dentry_open+0x1e2/0x2d0
[<ffffffffb9f07932>] ? security_inode_permission+0x22/0x30
[<ffffffffb9e52700>] ? cdev_put+0x30/0x30
[<ffffffffb9e4a9fa>] vfs_open+0x5a/0xb0
[<ffffffffb9e590c3>] ? may_open+0xa3/0x120
[<ffffffffb9e5cfa6>] do_last+0x1f6/0x1340
[<ffffffffb9e289f6>] ? kmem_cache_alloc_trace+0x1d6/0x200
[<ffffffffb9e5e1bd>] path_openat+0xcd/0x5a0
[<ffffffffb9e6040d>] do_filp_open+0x4d/0xb0
[<ffffffffb9e6e437>] ? __alloc_fd+0x47/0x170
[<ffffffffb9e4bfe4>] do_sys_open+0x124/0x220
[<ffffffffb9e4c0fe>] SyS_open+0x1e/0x20
[<ffffffffba392ed2>] system_call_fastpath+0x25/0x2a