Hi, On Fri, May 26, 2017 at 04:30:53PM +0200, Jeremie Courreges-Anglas wrote: > I am the maintainer of openvpn in the OpenBSD ports tree. Here's > a report from Stefan Sperling (Cc'ed). > > > An openvpn server running on OpenBSD/sparc64 6.1 crashes when a client > > connects and starts doing traffic. Is anyone else seeing this?
Thanks for the report. I'll look into it.
Copying around the IP header doesn't feel like the proper solution,
though - it's basically replacing an unaligned access somewhere with
a larger (unaligned!) mem copy, where most likely changing a word
access to 2x byte access (etc) might achieve the same thing without
copying.
> To work around this, the patch below (also written by Stefan) was
> committed in our ports tree. TARGET_FREEBSD and TARGET_DRAGONFLY seem
> to be affected too.
FreeBSD/Sparc64 traps unaligned memory accesses and handles them
kernel-side. So you'll see a slowdown, but no signal.
Linux/Sparc64 has the same restrictions (unaligned access causing a
signal), but nobody has reported that yet, so maybe the underlying
memory alignment of the allocated buffer happens to be good enough
there.
gert
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