Date: Wed, 8 Oct 2008 18:20:04 +0000 (UTC)
From: Jared D. McNeill <jmcneill%invisible.ca@localhost>
Reply-To: gnats-bugs%NetBSD.org@localhost
To: kern-bug-people%NetBSD.org@localhost, gnats-admin%NetBSD.org@localhost,
netbsd-bugs%NetBSD.org@localhost, coto%marsrakete.de@localhost
Subject: Re: kern/22218 (using a USB isochronous endpoint freezes kernel)
The following reply was made to PR kern/22218; it has been noted by GNATS.
From: "Jared D. McNeill" <jmcneill%invisible.ca@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: kern-bug-people%netbsd.org@localhost, gnats-admin%netbsd.org@localhost,
netbsd-bugs%netbsd.org@localhost,
coto%core.de@localhost
Subject: Re: kern/22218 (using a USB isochronous endpoint freezes kernel)
Date: Wed, 8 Oct 2008 14:18:58 -0400 (EDT)
On Wed, 8 Oct 2008, Thomas Runge wrote:
> I kept the app running for a few days. This works quite nicely, as long,
> as there is no activity on this system. When I start a cvs update, the
> kernel will panic soon. This is my latest stacktrace:
>
> ugen_isoc_rintr(c1079100,c6e41374,0,1,0,e500,15c0,4,3c1,4) at
netbsd:ugen_isoc_rintr+0x56
> usb_transfer_complete(c1079100,15c0,20,a,3,c6e41380,c6509520,0,0,0) at
netbsd:usb_transfer_complete+0xba
> ohci_softintr(c6509524,0,30,c63b0010,c63c0010,0,1fc7be0,c0e9f080,0,c63bbda0)
at netbsd:ohci_softintr+0x543
> softint_dispatch(c74adae0,4,0,0,0,0,c63bbd90,c63bbbd8,c63bbc30,28) at
netbsd:softint_dispatch+0x7c
> DDB lost frame for netbsd:Xsoftintr+0x3d, trying 0xc63bbd88
> Xsoftintr() at netbsd:Xsoftintr+0x3d
> --- interrupt ---
> fatal page fault in supervisor mode
> trap type 6 code 0 eip c052f6f7 cs 8 eflags 10202 cr2 3c ilevel 8
> kernel: supervisor trap page fault, code=0
> Faulted in DDB; continuing...
> db{0}>
This looks identical to an issue I'm seeing with a USB ATSC tuner and
ehci(4). I suspect the ehci isoc code was based on the ohci and uhci
implementations.. are you able to try this camera on a uhci to see if you
can reproduce the same crash there?