Ensure that buffers are unmapped on process exit and adapter deletion

Before duplicating a handle elsewhere and closing the original process
would result in disaster. Also, it turns out that TunHaltEx can be
called before the handles are all closed, so we need to unregister prior
to freeing the ctx, lest disaster occurs. Finally, now that we have a
few different things happening with registration and deregistration, we
serialize all accesses with an eresource, a bit heavy-weight but
sufficient.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

0 files changed, 0 insertions, 0 deletions