5.0RC3 - Faulted in mid-traceback

[Arnaud Lacombe <lacombar%gmail.com@localhost>]

Hi all,

I just had a reproducible problem with 5.0RC3 on a soekris 5501 and an
apparently bogus USB device:

uhub0: device problem, disabling port 1
fatal page fault in supervisor mode
trap type 6 code 0 eip c071bb85 cs 8 eflags 10246 cr2 48 ilevel 4
panic: trap
Begin traceback...
fatal page fault in supervisor mode
trap type 6 code 0 eip c053e111 cs 8 eflags 10246 cr2 0 ilevel 4
panic: trap
Faulted in mid-traceback; aborting...
dumping to dev 0,1 offset 8
dump fatal page fault in supervisor mode
trap type 6 code 9 eip c052cb0f cs 8 eflags 10206 cr2 bff00000 ilevel 8
panic: trap
Faulted in mid-traceback; aborting...
dumping to dev 0,1 offset 8
dump fatal page fault in supervisor mode
trap type 6 code 9 eip c052cb0f cs 8 eflags 10206 cr2 bff00000 ilevel 8
panic: trap
Faulted in mid-traceback; aborting...
dumping to dev 0,1 offset 8
[... infinite loop ...]

I cannot get any control on the machine after that and an obliged to
do a hard reboot. Interesting part of the dmesg:

ohci0 at pci0 dev 21 function 0: vendor 0x1022 product 0x2094 (rev. 0x02)
ohci0: interrupting at irq 15
ohci0: OHCI version 1.0, legacy support
usb0 at ohci0: USB revision 1.0
gcscehci0 at pci0 dev 21 function 1: vendor 0x1022 product 0x2095 (rev. 0x02)
gcscehci0: interrupting at irq 15
gcscehci0: EHCI version 1.0
gcscehci0: companion controller, 4 ports each: ohci0
usb1 at gcscehci0: USB revision 2.0
[,,,]
uhub0 at usb0: vendor 0x1022 OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 4 ports with 4 removable, self powered
uhub1 at usb1: vendor 0x1022 EHCI root hub, class 9/0, rev 2.00/1.00, addr 1
uhub1: 4 ports with 4 removable, self powered

Other USB device detection seems to work on both uhub0 and uhub1:

ugen0 at uhub1 port 1
ugen0: Apple Inc. iPod, rev 2.00/0.01, addr 2
ugen0: at uhub1 port 1 (addr 2) disconnected
ugen0: detached

uhidev0 at uhub0 port 1 configuration 1 interface 0
uhidev0: Logitech USB Optical Mouse, rev 2.00/43.01, addr 2, iclass 3/1
ums0 at uhidev0: 3 buttons and Z dir.
wsmouse0 at ums0 mux 0
uhidev0: at uhub0 port 1 (addr 2) disconnected
wsmouse0: detached
ums0: detached
uhidev0: detached

Label on the disk (might be usefull):
# disklabel wd0
16 partitions:
#        size    offset     fstype [fsize bsize cpg/sgs]
 a:   1914192        63     4.2BSD   1024  8192     0  # (Cyl.      0*-   1899*)
 b:     67473   1914255       swap                     # (Cyl.   1899*-   1965)
 c:   1981665        63     unused      0     0        # (Cyl.      0*-   1965)
 d:   1981728         0     unused      0     0        # (Cyl.      0 -   1965)

but no swap is in use/mounted.

any idea ?

 - Arnaud