panic: mutex tcp owned at /usr/src/sys/netinet/tcp_input.c:2475

Stefan Bethke stb at
Sun May 13 22:17:31 UTC 2007

Am 13.05.2007 um 21:45 schrieb Attilio Rao:

> 2007/5/11, Stefan Bethke <stb at>:
>> Am 11.05.2007 um 22:33 schrieb Andre Oppermann:
>> > Stefan Bethke wrote:
>> >> Got this reproducable panic on AMD64 on a couple of days old -
>> >> current  when I try to copy a file off a ZFS dataset via
>> >> netatalk's afpd (via  TCP, no actual AppleTalk involved).
>> >
>> > This is a recursive leak of the INP_INFO_LOCK() you've hit here.
>> > We don't
>> > know yet where it gets leaked but we're working on it.
>> Hhm.  I can trigger it very easily.  I don't have a serial console on
>> this box, but I could try a few things in a debugger if anyone wants
>> me to look at anything in particular.
> Hello Stefan,
> can you please recompile your kernel with INVARIANTS, DDB and KTR  
> support?
> Just add those lines:
> options INVARIANTS
> options KDB
> options DDB
> options KTR
> options KTR_ENTRIES=65534
> and possibly remove kbdmux from your config file (not sure if it has
> still problems with our syscons, though).
> Then, when you hit that panic you should just be redirected to ddb.
> At that point please write 'show ktr' in the ddb prompt and report
> what it shows.

Left kbdmux in for the moment. Hit the panic, and show ktr shows  

db> show ktr
--- End of trace buffer ---

If you think it's useful, I can remove kdbmux as well and try again.


Stefan Bethke <stb at>   Fon +49 170 346 0140

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