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Re: kern/53664 (nfs client broken on netbsd-8)

Le 13/10/2018 à 13:15, Michael van Elst a écrit :
The following reply was made to PR kern/53664; it has been noted by GNATS.

From: (Michael van Elst)
Subject: Re: kern/53664 (nfs client broken on netbsd-8)
Date: Sat, 13 Oct 2018 11:14:28 -0000 (UTC) (Martin Husemann) writes:

  > Just to make sure: default nfs mounts changed from UDP to TCP and I have
  > not seen any NFS fallout with any -current version in the meantime,
  > even with r1.20. Is the fallout specific to UDP maybe, or specific
  > network devices or server settings?

  It's specific to IP reassembly, and that's very rarely used with TCP
  but for NFS almost always with UDP.

No, the fallout is when someone reads ip_off on a reassembled packet, which
very few places do in practice. Fragmented UDP worked correctly, that's how
I did basic testing. So did TCP, etc.

Probably htodd's configuration reads ip_off somewhere in a way that matters,
and in all cases, it was a mistake (from the code before me, and also from me)
not to explicitly reset ip_off to zero.

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