Subject: nasty little panics from 'route change ...'
To: None <email@example.com, firstname.lastname@example.org>
From: John Hood <email@example.com>
Date: 11/14/1994 01:58:13
tonight, i decided to play with setting the MTU on my default route to
the world. Since I was nearly finished with an FTP of the netbsd-1.0
distribution over a SLIP link, my system's "oh-no" detector went off
the scale and communicated an urgent need to panic to the kernel quite
If you do a
route change -net foo -mtu 1500
(or presumably any other modifier option) with no destination address
specified, the kernel panics, on what looks like a null deref in
ifa_withdstaddr (not too surprising a location, eh?) it's not obvious
to me where the fix lies and I don't have current sources anywhere at
the moment, so i leave it to you folks.
system specifics: FreeBSD 220.127.116.11 with gnu-ish FPU emulator, latest
iteration of blessed patches, on a 486sx. Also reproduced on a late
NetBSD 1.0beta binary distribution, GENERICAHA kernel, date
approximately Oct 19th, on a 486dx. both are on a home ethernet with
a slip router to the rest of the planet.
I'm assuming this problem is likely to be in FreeBSD 2.0, but I don't
know that for sure.
root# route change -net 127.0.0.1 -mtu 1500
root# route change -net 127.0.0.1 127.0.0.1 -mtu 1500
John Hood Cthulhu-- just imagine it!