On Thu, Dec 6, 2018 at 1:41 AM William Allen Simpson <william.allen.simpson@gmail.com> wrote:

In any case, this particular denial of service attack should be easy to fix by
adding SVC_DESTROY to the Ganesha umount code path(s).

Should I do SVC_DESTROY or SVC_RELEASE in unmount?

Also I am not sure if we will hit this issue if client mount and reboot without unmount.

I will test that, will unmount fix work in that case?

However, because it seems
rather unlikely this could happen in production, it's not currently a high priority.

Do you have a production environment or customer report where this occurred?

No its not customer issue, I faced it after taking extra ref fix https://github.com/nfs-ganesha/ntirpc/pull/155.

But as I mentioned earlier if it happens in client reboot case also then its likely to happen in production if there is client which is crashing and coming up. I will check it.

Would you like help writing the Ganesha patch?

I would surely like to help with the fix.

Are you with Nutanix? Or IBM?

I am with Nutanix.

-Gaurav