Panic in rt_check

[Kris Kennaway]

Ivan Voras wrote:
> Hi,
> 
> I have a machine that panics almost daily in route.c, in rt_check(). 
> This panic has been reported by several users, including Marcel 
> Moolenaar for a machine in freebsd.org.
> 
> The problem is present in both 6-STABLE and 7-CURRENT, and apparently it 
> manifests on SMP machines, both i386 and AMD64.
> 
> The panic backtrace looks like this:
> 
> panic: mtx_lock() of destroyed mutex @ /usr/src/sys/net/route.c:1305

I've asked this before of others without getting an answer: is it 
possible that your gateway route is disappearing (e.g. router going 
offline, flaky switch, cable unplugged, etc)?  I have seen this panic 
(only) in that situation.

Kris