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Issue 742546 link

Starred by 1 user
Status: WontFix
Owner:
█ marc...@chromium.org
Last visit > 30 days ago
Closed: Jul 2017
Cc:
osh...@chromium.org
█ dbehr@chromium.org
Components:
EstimatedDays: ----
NextAction: ----
OS: Chrome
Pri: 1
Type: Bug



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MIMO touchscreen monitor doesn't work with kevin, crashes the entire system on disconnect

Project Member Reported by afakhry@chromium.org, Jul 13 2017 
Google Chrome 61.0.3156.0 (Official Build) unknown (32-bit)
Platform 9696.0.0 (Official Build) dev-channel kevin test
Firmware Version Google_Kevin.8785.126.0
Customization ID SAMSUNG-KEVIN1

1) Connect a MIMO touchscreen monitor to a kevin device.
   ->> Nothing happens, nothing shows up on the screen.

   ->> Observe the following logs from /var/log/messages.

2017-07-13T14:42:58.448559-07:00 INFO kernel: [  778.855619] usb usb6: New USB device found, idVendor=1d6b, idProduct=0003
2017-07-13T14:42:58.448575-07:00 INFO kernel: [  778.855641] usb usb6: New USB device strings: Mfr=3, Product=2, SerialNumber=1
2017-07-13T14:42:58.450467-07:00 INFO kernel: [  778.856800] usb usb6: Product: xHCI Host Controller
2017-07-13T14:42:58.450535-07:00 INFO kernel: [  778.856838] usb usb6: Manufacturer: Linux 4.4.70-10452-g191dca88b1ed xhci-hcd
2017-07-13T14:42:58.450546-07:00 INFO kernel: [  778.856857] usb usb6: SerialNumber: xhci-hcd.2.auto
2017-07-13T14:42:58.452476-07:00 INFO kernel: [  778.859441] hub 6-0:1.0: USB hub found
2017-07-13T14:42:58.452540-07:00 INFO kernel: [  778.859523] hub 6-0:1.0: 1 port detected
2017-07-13T14:42:58.453432-07:00 INFO kernel: [  778.860282] rockchip-dwc3 usb@fe900000: USB HOST connected
2017-07-13T14:42:58.994519-07:00 INFO kernel: [  779.400819] usb 5-1: new high-speed USB device number 2 using xhci-hcd
2017-07-13T14:42:59.109115-07:00 INFO kernel: [  779.514105] usb 5-1: New USB device found, idVendor=1a40, idProduct=0101
2017-07-13T14:42:59.109177-07:00 INFO kernel: [  779.514131] usb 5-1: New USB device strings: Mfr=0, Product=1, SerialNumber=0
2017-07-13T14:42:59.109184-07:00 INFO kernel: [  779.514140] usb 5-1: Product: USB 2.0 Hub [MTT]
2017-07-13T14:42:59.120113-07:00 INFO kernel: [  779.527297] hub 5-1:1.0: USB hub found
2017-07-13T14:42:59.121420-07:00 INFO kernel: [  779.527808] hub 5-1:1.0: 4 ports detected
2017-07-13T14:42:59.416111-07:00 INFO kernel: [  779.823338] usb 5-1.1: new high-speed USB device number 3 using xhci-hcd
2017-07-13T14:42:59.495448-07:00 INFO kernel: [  779.902259] usb 5-1.1: New USB device found, idVendor=1a40, idProduct=0401
2017-07-13T14:42:59.495520-07:00 INFO kernel: [  779.902279] usb 5-1.1: New USB device strings: Mfr=0, Product=1, SerialNumber=0
2017-07-13T14:42:59.495528-07:00 INFO kernel: [  779.902287] usb 5-1.1: Product: USB 2.0 Hub
2017-07-13T14:42:59.504426-07:00 INFO kernel: [  779.911353] hub 5-1.1:1.0: USB hub found
2017-07-13T14:42:59.504480-07:00 INFO kernel: [  779.911476] hub 5-1.1:1.0: 2 ports detected
2017-07-13T14:42:59.778421-07:00 INFO kernel: [  780.184786] usb 5-1.1.1: new high-speed USB device number 4 using xhci-hcd
2017-07-13T14:42:59.865710-07:00 INFO kernel: [  780.272248] usb 5-1.1.1: New USB device found, idVendor=17e9, idProduct=016b
2017-07-13T14:42:59.865752-07:00 INFO kernel: [  780.272264] usb 5-1.1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
2017-07-13T14:42:59.865758-07:00 INFO kernel: [  780.272272] usb 5-1.1.1: Product: Magic Touch V2.0
2017-07-13T14:42:59.865763-07:00 INFO kernel: [  780.272279] usb 5-1.1.1: Manufacturer: DisplayLink
2017-07-13T14:42:59.865768-07:00 INFO kernel: [  780.272286] usb 5-1.1.1: SerialNumber: MTH1502300087
2017-07-13T14:42:59.890434-07:00 INFO kernel: [  780.297650] [drm] vendor descriptor length:17 data:17 5f 01 00 15 05 00 01 03 00 04
2017-07-13T14:42:59.893431-07:00 INFO kernel: [  780.299994] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
2017-07-13T14:42:59.893486-07:00 INFO kernel: [  780.300031] [drm] No driver support for vblank timestamp query.
2017-07-13T14:42:59.893492-07:00 INFO kernel: [  780.300041] [drm] Initialized udl on minor 2
2017-07-13T14:42:59.965834-07:00 INFO kernel: [  780.372826] usb 5-1.1.2: new full-speed USB device number 5 using xhci-hcd
2017-07-13T14:43:00.051462-07:00 INFO kernel: [  780.457780] usb 5-1.1.2: New USB device found, idVendor=266e, idProduct=0101
2017-07-13T14:43:00.051521-07:00 INFO kernel: [  780.457799] usb 5-1.1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
2017-07-13T14:43:00.051527-07:00 INFO kernel: [  780.457807] usb 5-1.1.2: Product: Magic10
2017-07-13T14:43:00.051553-07:00 INFO kernel: [  780.457814] usb 5-1.1.2: Manufacturer: Multimedia-link, Inc
2017-07-13T14:43:00.108432-07:00 INFO kernel: [  780.515206] input: Multimedia-link, Inc Magic10 as /devices/platform/usb@fe900000/fe900000.dwc3/xhci-hcd.2.auto/usb5/5-1/5-1.1/5-1.1.2/5-1.1.2:1.0/0003:266E:0101.0002/input/input8
2017-07-13T14:43:00.159435-07:00 INFO kernel: [  780.566522] hid-multitouch 0003:266E:0101.0002: input,hiddev0,hidraw1: USB HID v1.11 Device [Multimedia-link, Inc Magic10] on usb-xhci-hcd.2.auto-1.1.2/input0
2017-07-13T14:43:01.675821-07:00 ERR mtpd[2114]: LIBMTP_Detect_Raw_Devices failed with 5
2017-07-13T14:43:02.438429-07:00 INFO kernel: [  782.845138] PDLOG 2017/07/13 21:42:18.1499982137 P1 Disconnected

2) Disconnect the MIMO monitor.
  ->> System crashes. [attached console-ramoops].
console-ramoops
71.4 KB View Download

Comment 1 by afakhry@chromium.org, Jul 13 2017 

[  302.528284] usb 5-1: USB disconnect, device number 2
[  302.528312] usb 5-1.1: USB disconnect, device number 3
[  302.528325] usb 5-1.1.1: USB disconnect, device number 4
[  302.529675] Unable to handle kernel NULL pointer dereference at virtual address 00000368
[  302.529699] pgd = ffffffc001210000
[  302.529708] [00000368] *pgd=0000000000221003, *pud=0000000000221003, *pmd=0000000000222003, *pte=00e80000fee00707
[  302.529787] Internal error: Oops: 96000005 [#1] PREEMPT SMP
[  302.529813] Modules linked in: hid_multitouch cmac rfcomm btusb btrtl btbcm btintel uinput mwifiex_pcie mwifiex uvcvideo videobuf2_vmalloc zram bluetooth ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat xt_mark bridge fuse stp llc cfg80211 ip6table_filter joydev
[  302.529947] CPU: 0 PID: 2660 Comm: kworker/0:2 Not tainted 4.4.70-10452-g191dca88b1ed #1
[  302.529955] Hardware name: Google Kevin (DT)
[  302.529981] Workqueue: usb_hub_wq hub_event
[  302.529993] task: ffffffc0d641c100 ti: ffffffc0c8d0c000 task.ti: ffffffc0c8d0c000
[  302.530011] PC is at mutex_lock+0x40/0x70
[  302.530021] LR is at mutex_lock+0x2c/0x70
[  302.530030] pc : [<ffffffc000939d80>] lr : [<ffffffc000939d6c>] pstate: 60000145
[  302.530038] sp : ffffffc0c8d0f880
[  302.530045] x29: ffffffc0c8d0f880 x28: 0000000000000048 
[  302.530059] x27: 0000000000000000 x26: 0000000000000000 
[  302.530073] x25: 00000000ffffffed x24: 0000000000000000 
[  302.530087] x23: ffffffc0010f4d38 x22: ffffffc0010f4db0 
[  302.530107] x21: 0000000000000000 x20: ffffffc0e27b08b8 
[  302.530122] x19: 0000000000000368 x18: 0000000000000000 
[  302.530135] x17: 0000000000000000 x16: 0000000000000000 
[  302.530150] x15: 0000000000000000 x14: 0ffffffffffffff8 
[  302.530164] x13: 0000000000000030 x12: 0000000000000030 
[  302.530179] x11: 0101010101010101 x10: 7f7f7f7f7f7f7f7f 
[  302.530194] x9 : fefefefefefefeff x8 : 00000000ffffffff 
[  302.530208] x7 : 00000000ffffff80 x6 : 0000000000000004 
[  302.530222] x5 : 0000000000000000 x4 : ffffffbdc2cb5220 
[  302.530236] x3 : ffffffc0d641c100 x2 : 0000000000000000 
[  302.530251] x1 : ffffffc0d641c100 x0 : 0000000000000000 
[  302.530269] 
[  302.530269] PC: 0xffffffc000939d00:
[  302.530277] 9d00  17ffffee aa1503e0 94000842 17ffffc2 f9403fa1 f94506c0 eb00003f 54000040
[  302.530316] 9d20  97e398d7 a94153f3 a9425bf5 a94363f7 a9446bf9 a94573fb a8c87bfd d65f03c0
[  302.530354] 9d40  a9be7bfd 910003fd f9000bf3 aa0003f3 aa1e03e0 d503201f d00015a0 52801d81
[  302.530393] 9d60  91112400 52800002 97e44263 910003e0 9272c400 f9400801 d2800000 f9800271
[  302.530433] 9d80  c85ffe62 ca000043 b5000083 c8037e61 35ffff83 aa0003e2 b4000062 aa1303e0
[  302.530471] 9da0  97ffff0d f9400bf3 a8c27bfd d65f03c0 a9ba7bfd 910003fd a90153f3 a9025bf5
[  302.530510] 9dc0  a90363f7 f0003a94 aa0003f3 aa1e03e0 910123b6 d503201f f9002bb6 f9450680
[  302.530549] 9de0  f9002fa0 d2800020 f90027a0 f9400260 927f0018 370801c0 92400801 f9800271
[  302.530589] 
[  302.530589] LR: 0xffffffc000939cec:
[  302.530598] 9cec  35ffff84 aa0003e2 eb00005f 54ffed60 aa0203e0 17ffffee aa1503e0 94000842
[  302.530639] 9d0c  17ffffc2 f9403fa1 f94506c0 eb00003f 54000040 97e398d7 a94153f3 a9425bf5
[  302.530678] 9d2c  a94363f7 a9446bf9 a94573fb a8c87bfd d65f03c0 a9be7bfd 910003fd f9000bf3
[  302.530715] 9d4c  aa0003f3 aa1e03e0 d503201f d00015a0 52801d81 91112400 52800002 97e44263
[  302.530755] 9d6c  910003e0 9272c400 f9400801 d2800000 f9800271 c85ffe62 ca000043 b5000083
[  302.530793] 9d8c  c8037e61 35ffff83 aa0003e2 b4000062 aa1303e0 97ffff0d f9400bf3 a8c27bfd
[  302.530831] 9dac  d65f03c0 a9ba7bfd 910003fd a90153f3 a9025bf5 a90363f7 f0003a94 aa0003f3
[  302.530869] 9dcc  aa1e03e0 910123b6 d503201f f9002bb6 f9450680 f9002fa0 d2800020 f90027a0
[  302.530909] 
[  302.530909] SP: 0xffffffc0c8d0f800:
[  302.530918] f800  010f4db0 ffffffc0 010f4d38 ffffffc0 00000000 00000000 ffffffed 00000000
[  302.530955] f820  00000000 00000000 00000000 00000000 00000048 00000000 c8d0f880 ffffffc0
[  302.530995] f840  00939d6c ffffffc0 c8d0f880 ffffffc0 00939d80 ffffffc0 60000145 00000000
[  302.531035] f860  00000368 00000000 e27b08b8 ffffffc0 ffffffff ffffffff 010f4db0 ffffffc0
[  302.531074] f880  c8d0f8a0 ffffffc0 005a821c ffffffc0 00000368 00000000 dc8ba646 cb88537f
[  302.531121] f8a0  c8d0f8d0 ffffffc0 005a50cc ffffffc0 e27b08a0 ffffffc0 e27b0800 ffffffc0
[  302.531159] f8c0  e27b08a0 ffffffc0 e275c800 ffffffc0 c8d0f8f0 ffffffc0 005bf520 ffffffc0
[  302.531195] f8e0  e275c800 ffffffc0 00000000 00000000 c8d0f920 ffffffc0 005bef98 ffffffc0
[  302.531235] 
[  302.531235] X1: 0xffffffc0d641c080:
[  302.531243] c080  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  302.531282] c0a0  7e847e62 7eac7e90 7f007eff 7f507f38 7f6b7f55 82f381ea 8a848952 8b4d8b4c
[  302.531321] c0c0  8b5a8b4e 8c348bb0 8cd68c39 8e468e44 8eb88e84 8f568f19 8f688f67 8ffa8f9a
[  302.531361] c0e0  916c9028 92e591f3 94d3944c 956d94e9 970895da 9736970e 976a9737 97c497c3
[  302.531400] c100  00000000 00000000 c8d0c000 ffffffc0 00000002 04208060 00000000 00000000
[  302.531439] c120  00000000 00000000 00000001 0000000f 000009c3 00000001 ec43b400 ffffffc0
[  302.531477] c140  00000000 00000001 00000078 00000078 00000078 00000000 00a06750 ffffffc0
[  302.531516] c160  00000400 00000000 00400000 00000000 00000001 00000000 00000000 00000000
[  302.531553] 
[  302.531553] X3: 0xffffffc0d641c080:
[  302.531562] c080  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  302.531601] c0a0  7e847e62 7eac7e90 7f007eff 7f507f38 7f6b7f55 82f381ea 8a848952 8b4d8b4c
[  302.531638] c0c0  8b5a8b4e 8c348bb0 8cd68c39 8e468e44 8eb88e84 8f568f19 8f688f67 8ffa8f9a
[  302.531675] c0e0  916c9028 92e591f3 94d3944c 956d94e9 970895da 9736970e 976a9737 97c497c3
[  302.531713] c100  00000000 00000000 c8d0c000 ffffffc0 00000002 04208060 00000000 00000000
[  302.531753] c120  00000000 00000000 00000001 0000000f 000009c3 00000001 ec43b400 ffffffc0
[  302.531791] c140  00000000 00000001 00000078 00000078 00000078 00000000 00a06750 ffffffc0
[  302.531830] c160  00000400 00000000 00400000 00000000 00000001 00000000 00000000 00000000
[  302.531876] 
[  302.531876] X20: 0xffffffc0e27b0838:
[  302.531885] 0838  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  302.531924] 0858  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  302.531963] 0878  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  302.532002] 0898  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  302.532039] 08b8  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  302.532083] 08d8  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  302.532121] 08f8  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  302.532161] 0918  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  302.532202] 
[  302.532202] X22: 0xffffffc0010f4d30:
[  302.532211] 4d30  00000000 00000000 00c2f40e ffffffc0 005bd720 ffffffc0 005bd6d0 ffffffc0
[  302.532251] 4d50  00000000 00000000 005bd684 ffffffc0 005bd6a0 ffffffc0 00000000 00000000
[  302.532289] 4d70  00000000 00000000 00000000 00000000 010f5028 ffffffc0 00060006 dead4ead
[  302.532329] 4d90  ffffffff 00000000 ffffffff ffffffff 010f4da0 ffffffc0 010f4da0 ffffffc0
[  302.532368] 4db0  00c2f40e ffffffc0 01100818 ffffffc0 00000000 00000000 00c2f40e ffffffc0
[  302.532411] 4dd0  00000000 00000000 00000000 00000000 00000000 00000000 0066979c ffffffc0
[  302.532449] 4df0  00669178 ffffffc0 00000000 00000000 00000000 00000000 00000000 00000000
[  302.532488] 4e10  00000000 00000000 00000000 00000000 ede5ec00 ffffffc0 00000000 00000000
[  302.532527] 
[  302.532527] X23: 0xffffffc0010f4cb8:
[  302.532536] 4cb8  010f6218 ffffffc0 00000000 00000000 00000000 00000000 00000000 00000000
[  302.532577] 4cd8  00a52c70 ffffffc0 00000000 00000000 005f9f14 ffffffc0 005f9ec4 ffffffc0
[  302.532615] 4cf8  005f9a08 ffffffc0 00000000 00000000 00000000 00000000 00000000 00000000
[  302.532654] 4d18  00000000 00000000 ede5e100 ffffffc0 00000000 00000000 00000000 00000000
[  302.532693] 4d38  00c2f40e ffffffc0 005bd720 ffffffc0 005bd6d0 ffffffc0 00000000 00000000
[  302.532734] 4d58  005bd684 ffffffc0 005bd6a0 ffffffc0 00000000 00000000 00000000 00000000
[  302.532775] 4d78  00000000 00000000 010f5028 ffffffc0 00060006 dead4ead ffffffff 00000000
[  302.532814] 4d98  ffffffff ffffffff 010f4da0 ffffffc0 010f4da0 ffffffc0 00c2f40e ffffffc0
[  302.532857] 
[  302.532857] X29: 0xffffffc0c8d0f800:
[  302.532865] f800  010f4db0 ffffffc0 010f4d38 ffffffc0 00000000 00000000 ffffffed 00000000
[  302.532907] f820  00000000 00000000 00000000 00000000 00000048 00000000 c8d0f880 ffffffc0
[  302.532947] f840  00939d6c ffffffc0 c8d0f880 ffffffc0 00939d80 ffffffc0 60000145 00000000
[  302.532985] f860  00000368 00000000 e27b08b8 ffffffc0 ffffffff ffffffff 010f4db0 ffffffc0
[  302.533024] f880  c8d0f8a0 ffffffc0 005a821c ffffffc0 00000368 00000000 dc8ba646 cb88537f
[  302.533067] f8a0  c8d0f8d0 ffffffc0 005a50cc ffffffc0 e27b08a0 ffffffc0 e27b0800 ffffffc0
[  302.533105] f8c0  e27b08a0 ffffffc0 e275c800 ffffffc0 c8d0f8f0 ffffffc0 005bf520 ffffffc0
[  302.533144] f8e0  e275c800 ffffffc0 00000000 00000000 c8d0f920 ffffffc0 005bef98 ffffffc0
[  302.533183] 
[  302.533192] Process kworker/0:2 (pid: 2660, stack limit = 0xffffffc0c8d0c040)
[  302.533203] Stack: (0xffffffc0c8d0f880 to 0xffffffc0c8d10000)
[  302.533216] f880: ffffffc0c8d0f8a0 ffffffc0005a821c 0000000000000368 cb88537fdc8ba646
[  302.533227] f8a0: ffffffc0c8d0f8d0 ffffffc0005a50cc ffffffc0e27b08a0 ffffffc0e27b0800
[  302.533238] f8c0: ffffffc0e27b08a0 ffffffc0e275c800 ffffffc0c8d0f8f0 ffffffc0005bf520
[  302.533248] f8e0: ffffffc0e275c800 0000000000000000 ffffffc0c8d0f920 ffffffc0005bef98
[  302.533259] f900: ffffffc0b7bb6000 ffffffc0e275c800 ffffffc0d64e0c00 ffffffc0010f3000
[  302.533270] f920: ffffffc0c8d0f940 ffffffc000592254 ffffffc0b7bb6000 ffffffc0010f3000
[  302.533280] f940: ffffffc0c8d0f970 ffffffc0005926b4 ffffffc0b7bb6000 ffffffc0010f3000
[  302.533291] f960: ffffffc0d64e0c00 feff2f3535303c4c ffffffc0c8d0f990 ffffffc000592720
[  302.533303] f980: ffffffc0b7bb6000 0000000000000001 ffffffc0c8d0f9b0 ffffffc0005bd714
[  302.533314] f9a0: ffffffc0b7bb6000 ffffffc0e275e000 ffffffc0c8d0f9d0 ffffffc000669218
[  302.533326] f9c0: ffffffc0d64e0c30 ffffffc0d64e0c00 ffffffc0c8d0fa40 ffffffc0005f8288
[  302.533336] f9e0: ffffffc0d64e0c30 ffffffc0010f4db0 ffffffc0d64e0c40 ffffffc0e275e090
[  302.533347] fa00: ffffffc0b7c28000 ffffffc0e275e0f0 ffffffc0ef174800 0000000000000001
[  302.533358] fa20: ffffffc0b7c28000 ffffffc0c8c88800 ffffffc0d64e0c40 ffffffc0e275e090
[  302.533376] fa40: ffffffc0c8d0fa70 ffffffc0005f8314 ffffffc0d64e0c90 ffffffc0d64e0c30
[  302.533387] fa60: ffffffc001100818 0000000000000000 ffffffc0c8d0fa90 ffffffc0005f73b8
[  302.533398] fa80: ffffffc0d64e0c30 0000000000000000 ffffffc0c8d0fac0 ffffffc0005f4318
[  302.533409] faa0: ffffffc0d64e0c30 ffffffc001100818 ffffffc00108c000 ffffffc0e275e090
[  302.533420] fac0: ffffffc0c8d0fb20 ffffffc000666c60 ffffffc0e275e000 0000000000000000
[  302.533431] fae0: 0000000000000000 ffffffc0d64e0c30 ffffffc0c8d0fb20 ffffffc000666c58
[  302.533441] fb00: ffffffc0e275e000 0000000000000000 0000000000000000 cb88537fdc8ba646
[  302.533452] fb20: ffffffc0c8d0fb60 ffffffc00065e708 ffffffc0e275e000 ffffffc0e275e090
[  302.533462] fb40: 0000000000000000 0000000000000000 0000000000000000 ffffffc0ef177000
[  302.533473] fb60: ffffffc0c8d0fbb0 ffffffc00065e6f4 ffffffc0e275f800 ffffffc0e275f890
[  302.533483] fb80: 0000000000000000 ffffffc0ef177000 0000000000000000 ffffffc0e275f8f0
[  302.533494] fba0: ffffffc0b7c14800 ffffffc0b7c17800 ffffffc0c8d0fc00 ffffffc00065e6f4
[  302.533506] fbc0: ffffffc0e275d800 ffffffc0e275d890 0000000000000000 ffffffc0b7c17800
[  302.533516] fbe0: 0000000000000000 ffffffc0e275d8f0 ffffffc0c8c88800 0000000000000100
[  302.533527] fc00: ffffffc0c8d0fc60 ffffffc000660088 ffffffc0c8c88000 0000000000000001
[  302.533538] fc20: ffffffc0c8c88000 0000000000000100 0000000000000000 ffffffc0ec582800
[  302.533549] fc40: ffffffc0ec582800 0000000000000001 ffffffc0ee3bb400 ffffffc00026ddd4
[  302.533560] fc60: ffffffc0c8d0fd50 ffffffc0002390a0 ffffffc0e6039100 ffffffc0c8c88238
[  302.533572] fc80: ffffffc0f7b16b80 0000000000000000 ffffffc0f7b1cb00 ffffffc001148d70
[  302.533583] fca0: 0000000000000000 0000000000000000 ffffffc001086000 0000000000000000
[  302.533595] fcc0: ffffffc0c8d0fcd0 ffffffc00108c000 ffffffc000000000 ffffffc0c8c88138
[  302.533606] fce0: ffffffc0c8c88808 ffffffc0c8c88b58 ffffffc0ec5828f0 ffffffc0c8c88b58
[  302.533616] fd00: ffffffc000000001 ffffffc0c8c8b800 ffffffc0c8c8b830 ffffffc001100540
[  302.533627] fd20: 0000000000000000 ffffffc0011004e0 ffffffc0c8c88119 ffffffc0c8c88238
[  302.533639] fd40: ffffffc000010100 cb88537fdc8ba646 ffffffc0c8d0fda0 ffffffc000239fb4
[  302.533650] fd60: ffffffc0e6039100 ffffffc0f7b16b80 ffffffc001148873 ffffffc0e6039130
[  302.533661] fd80: ffffffc0c8d0c000 ffffffc0f7b16ba8 0000000000000000 0000000000000000
[  302.533673] fda0: ffffffc0c8d0fe00 ffffffc00023f31c ffffffc0d645c080 ffffffc001151830
[  302.533684] fdc0: ffffffc000beb317 ffffffc0e6039100 ffffffc000239cb8 0000000000000000
[  302.533696] fde0: 0000000000000000 0000000000000000 0000000000000000 ffffffc0e6039100
[  302.533707] fe00: 0000000000000000 ffffffc000203dd0 ffffffc00023f1f8 ffffffc0d645c080
[  302.533718] fe20: 0000000000000000 0000000000000000 0000000000000000 ffffffc00024a02c
[  302.533728] fe40: 0000000000000000 ffffffc0c8d0c000 ffffffc0e6039100 ffffffc000000000
[  302.533739] fe60: dead4ead00000000 ffffffc0ffffffff ffffffffffffffff ffffffc0c8d0fe78
[  302.533750] fe80: ffffffc0c8d0fe78 0000000000000000 dead4ead00000000 00000000ffffffff
[  302.533762] fea0: ffffffffffffffff ffffffc0c8d0fea8 ffffffc0c8d0fea8 cb88537fdc8ba646
[  302.533772] fec0: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[  302.533782] fee0: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[  302.533793] ff00: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[  302.533803] ff20: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[  302.533814] ff40: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[  302.533824] ff60: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[  302.533835] ff80: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[  302.533845] ffa0: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[  302.533856] ffc0: 0000000000000000 0000000000000005 0000000000000000 0000000000000000
[  302.533865] ffe0: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[  302.533873] Call trace:
[  302.533890] [<ffffffc000939d80>] mutex_lock+0x40/0x70
[  302.533908] [<ffffffc0005a821c>] drm_mode_object_unregister+0x2c/0x58
[  302.533921] [<ffffffc0005a50cc>] drm_framebuffer_unregister_private+0x28/0x34
[  302.533933] [<ffffffc0005bf520>] udl_fbdev_cleanup+0x34/0x60
[  302.533944] [<ffffffc0005bef98>] udl_driver_unload+0x48/0x68
[  302.533957] [<ffffffc000592254>] drm_dev_unregister+0x4c/0xc0
[  302.533967] [<ffffffc0005926b4>] drm_put_dev+0x58/0x6c
[  302.533977] [<ffffffc000592720>] drm_unplug_dev+0x58/0x6c
[  302.533988] [<ffffffc0005bd714>] udl_usb_disconnect+0x44/0x50
[  302.534003] [<ffffffc000669218>] usb_unbind_interface+0xa0/0x1f8
[  302.534017] [<ffffffc0005f8288>] __device_release_driver+0xb4/0x114
[  302.534028] [<ffffffc0005f8314>] device_release_driver+0x2c/0x40
[  302.534040] [<ffffffc0005f73b8>] bus_remove_device+0x110/0x128
[  302.534054] [<ffffffc0005f4318>] device_del+0x164/0x1fc
[  302.534065] [<ffffffc000666c60>] usb_disable_device+0x94/0x1c8
[  302.534078] [<ffffffc00065e708>] usb_disconnect+0xa4/0x1d8
[  302.534089] [<ffffffc00065e6f4>] usb_disconnect+0x90/0x1d8
[  302.534101] [<ffffffc00065e6f4>] usb_disconnect+0x90/0x1d8
[  302.534112] [<ffffffc000660088>] hub_event+0x70c/0xde8
[  302.534129] [<ffffffc0002390a0>] process_one_work+0x26c/0x420
[  302.534140] [<ffffffc000239fb4>] worker_thread+0x2fc/0x424
[  302.534153] [<ffffffc00023f31c>] kthread+0x124/0x12c
[  302.534167] [<ffffffc000203dd0>] ret_from_fork+0x10/0x40
[  302.534180] Code: 9272c400 f9400801 d2800000 f9800271 (c85ffe62) 
[  302.535398] ---[ end trace 1a76472b0899acc3 ]---

Comment 2 by marc...@chromium.org, Jul 14 2017

Status: WontFix (was: Assigned)
Doesn't repro on ToT
►

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