[Bug 259071] Read past EoF in NFS client and fusefs

In reply to: bugzilla-noreply_a_freebsd.org: "[Bug 259071] Read reports wrong number of bytes on a network filesystem."
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From: <bugzilla-noreply_at_freebsd.org>
Date: Mon, 18 Oct 2021 20:34:59 UTC

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=259071

Alan Somers <asomers@FreeBSD.org> changed:

           What    |Removed                     |Added
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                 CC|                            |rmacklem@FreeBSD.org

--- Comment #2 from Alan Somers <asomers@FreeBSD.org> ---
Rick, have you every seen a bug like this?  To summarize:

* One thread alternately truncates, extends, and reads a file
* Another thread stats the same file

After a few seconds, one of the read operations returns more data than the file
ought to contain.  It usually rounds up to a 64kB boundary, but not always.  I
can reproduce it with the NFS client, but the OP says it happens in fuse, too.

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