port-arm/51453: mutex_vector_enter: locking against myself on RPi

[coypu%sdf.org@localhost]

>Number:         51453
>Category:       port-arm
>Synopsis:       mutex_vector_enter: locking against myself on RPi
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    port-arm-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Aug 31 07:25:01 +0000 2016
>Originator:     coypu
>Release:        7.99.36
>Organization:
>Environment:
NetBSD rpi 7.99.36 NetBSD 7.99.36 (RPI.201608290300Z) evbarm
>Description:
Inserting USB, etc. got the following:

Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
    2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016
    The NetBSD Foundation, Inc.  All rights reserved.
Copyright (c) 1982, 1986, 1989, 1991, 1993
    The Regents of the University of California.  All rights reserved.

NetBSD 7.99.36 (RPI.201608290300Z)
total memory = 192 MB
avail memory = 180 MB
sysctl_createv: sysctl_create(machine_arch) returned 17
timecounter: Timecounters tick every 10.000 msec
mainbus0 (root)
cpu0 at mainbus0 core 0: 700 MHz ARM1176JZ-S r0p7 (ARM11J V6ZK core)
cpu0: DC enabled IC enabled WB enabled LABT
cpu0: 16KB/32B 4-way L1 VIPT Instruction cache
cpu0: 16KB/32B 4-way write-back-locking-C L1 VIPT Data cache
vfp0 at cpu0: VFP11, rounding, exceptions
obio0 at mainbus0
bcmicu0 at obio0
bcmmbox0 at obio0 intr 65: VC mailbox
vcmbox0 at bcmmbox0
bcmtmr0 at obio0 intr 3: VC System Timer
vchiq0 at obio0 intr 66: BCM2835 VCHIQ
bcmpm0 at obio0: Power management, Reset and Watchdog controller
bcmdmac0 at obio0: DMA0 DMA2 DMA4 DMA5 DMA8 DMA9 DMA10
bcmrng0 at obio0: RNG
plcom0 at obio0 intr 57
plcom0: txfifo disabled
plcom0: console
genfb0 at obio0: switching to framebuffer console
genfb0: framebuffer at 0x4e876000, size 1280x720, depth 32, stride 5120
wsdisplay0 at genfb0 kbdmux 1: console (default, vt100 emulation)
wsmux1: connecting to wsdisplay0
wsdisplay0: screen 1-3 added (default, vt100 emulation)
sdhc0 at obio0 intr 62: SDHC controller
sdhc0: interrupting on intr 62
dwctwo0 at obio0 intr 9: USB controller
bcmspi0 at obio0 intr 54: SPI
spi0 at bcmspi0: SPI bus
bsciic0 at obio0 intr 53: BSC0
iic0 at bsciic0: I2C bus
bsciic1 at obio0 intr 53: BSC1
iic1 at bsciic1: I2C bus
bcmgpio0 at obio0: GPIO [0...31]
gpio0 at bcmgpio0: 32 pins
bcmgpio1 at obio0: GPIO [32...53]
gpio1 at bcmgpio1: 22 pins
bcmcm at obio0 not configured
bcmpwm at obio0 not configured
usb0 at dwctwo0: USB revision 2.0
timecounter: Timecounter "clockinterrupt" frequency 100 Hz quality 0
timecounter: Timecounter "bcmtmr0" frequency 1000000 Hz quality 100
sdhc0: SDHC 3.0, rev 153, platform DMA, 250000 kHz, HS SDR50 3.3V, re-tuning mode 1, 1024 byte blocks
sdmmc0 at sdhc0 slot 0
uhub0 at usb0: vendor 0000 DWC2 root hub, class 9/0, rev 2.00/1.00, addr 1
uhub0: 1 port with 1 removable, self powered
IPsec: Initialized Security Association Processing.
ld0 at sdmmc0: <0x03:0x5344:SE16G:0x80:0xec8c1be3:0x0fc>
ld0: 15193 MB, 7717 cyl, 64 head, 63 sec, 512 bytes/sect x 31116288 sectors
ld0: 4-bit width, SDR50, 100.000 MHz
uhub1 at uhub0 port 1: vendor 0424 product 9512, class 9/0, rev 2.00/2.00, addr 2
uhub1: multiple transaction translators
uhub1: 3 ports with 2 removable, self powered
usmsc0 at uhub1 port 1
usmsc0: vendor 0424 product ec00, rev 2.00/2.00, addr 3
usmsc0: Ethernet address b8:27:eb:a8:9d:ee
ukphy0 at usmsc0 phy 1: OUI 0x00800f, model 0x000c, rev. 3
ukphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
urtwn0 at uhub1 port 2
urtwn0: Realtek 802.11n WLAN Adapter, rev 2.00/2.00, addr 4
urtwn0: MAC/BB RTL8188CUS, RF 6052 1T1R, address 74:da:38:5b:6c:6c
urtwn0: 1 rx pipe, 2 tx pipes
urtwn0: 11b rates: 1Mbps 2Mbps 5.5Mbps 11Mbps
urtwn0: 11g rates: 1Mbps 2Mbps 5.5Mbps 11Mbps 6Mbps 9Mbps 12Mbps 18Mbps 24Mbps 36Mbps 48Mbps 54Mbps
uhub0: illegal enable change, port 1
WARNING: 1 error while detecting hardware; check system log.
boot device: ld0
root on ld0a dumps on ld0b
root file system type: ffs
kern.module.path=/stand/evbarm/7.99.36/modules
vchiq: local ver 6 (min 3), remote ver 6.
vcaudio0 at vchiq0: auds
WARNING: no TOD clock present
WARNING: using filesystem time
WARNING: CHECK AND RESET THE DATE!
audio0 at vcaudio0: half duplex, playback, capture, independent
wsdisplay0: screen 4 added (default, vt100 emulation)
urtwn0: detached
urtwn0: at uhub1 port 2 (addr 4) disconnected
uhidev0 at uhub1 port 2 configuration 1 interface 0
uhidev0: LITEON Technology USB Keyboard, rev 2.00/1.14, addr 4, iclass 3/1
ukbd0 at uhidev0: 8 modifier keys, 6 key codes
panic: lock error: Mutex: mutex_vector_enter: locking against myself: lock 0x8bdae02c cpu 0 lwp 0x8b926600
cpu0: Begin traceback...
0x8a1f57d4: netbsd:db_panic+0xc
0x8a1f57ec: netbsd:vpanic+0x144
0x8a1f5804: netbsd:snprintf
0x8a1f583c: netbsd:lockdebug_abort+0x60
0x8a1f5884: netbsd:mutex_enter+0x1b8
0x8a1f58dc: netbsd:pmap_fault_fixup+0x4c
0x8a1f5964: netbsd:data_abort_handler+0x144
0x8a1f59fc: netbsd:address_exception_entry+0x58
0x8a1f5a34: netbsd:dwc2_hcd_select_transactions+0xb0
0x8a1f5a84: netbsd:dwc2_handle_hcd_intr+0x464
0x8a1f5a9c: netbsd:dwc2_interrupt+0x28
0x8a1f5abc: netbsd:dwc2_intr+0xd0
0x8a1f5adc: netbsd:pic_dispatch+0x28
0x8a1f5b5c: netbsd:pic_do_pending_ints+0x29c
0x8a1f5be4: netbsd:irq_entry+0x60
0x8a1f5c54: netbsd:pmap_remove+0x194
0x8a1f5c9c: netbsd:uvm_unmap_remove+0x208
0x8a1f5ccc: netbsd:uvm_unmap1+0x3c
0x8a1f5cfc: netbsd:uvmspace_exec+0xdc
0x8a1f5d94: netbsd:execve_runproc+0x23c
0x8a1f5f1c: netbsd:execve1+0x44
0x8a1f5f34: netbsd:sys_execve+0x20
0x8a1f5fac: Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
    2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016
    The NetBSD Foundation, Inc.  All rights reserved.
Copyright (c) 1982, 1986, 1989, 1991, 1993
    The Regents of the University of California.  All rights reserved.

...
>How-To-Repeat:

>Fix: