Hi Chuck,
Am Donnerstag, 16. Juli 2020, 21:25:40 CEST schrieb Chuck Lever:
So this makes me think there's a possibility you are not using upstream stable kernels. I can't help if I don't know what source code and commit stream you are using. It also makes me question the bisect result.
Yes you are right, I was referring to Ubuntu kernels 5.4.0-XX. From the discussion in the Ubuntu bugtracker I got the impression that Ubuntu kernels 5.4.0-XX and upstream 5.4.XX are closely related, obviously they are not. The bisection was done by the original bug reporter and also refers to the Ubuntu kernel.
In the meantime I tested v5.4.51 upstream, which shows no problems. Sorry for the bother.
My krb5 etype is aes256-cts-hmac-sha1-96.
Thanks! And what is your NFS server and filesystem? It's possible that the client is not estimating the size of the reply correctly. Variables include the size of file handles, MIC verifiers, and wrap tokens.
The server is Debian with v4.19.130 upstream, filesystem ext4.
You might try:
e8d70b321ecc ("SUNRPC: Fix another issue with MIC buffer space")
That one is actually in Ubuntus 5.4.0-40, from looking at the code.
Best Regards