[Bug 233783] [fusefs] returns cached truncated data

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=233783

--- Comment #4 from commit-hook at freebsd.org ---
A commit references this bug:

Author: asomers
Date: Wed Apr  3 02:29:56 UTC 2019
New revision: 345823
URL: https://svnweb.freebsd.org/changeset/base/345823

Log:
  fusefs: during ftruncate, discard cached data past truncation point

  During truncate, fusefs was discarding entire cached blocks, but it wasn't
  zeroing out the unused portion of a final partial block.  This resulted in
  reads returning stale data.

  PR:           233783
  Reported by:  fsx
  Sponsored by: The FreeBSD Foundation

Changes:
  projects/fuse2/sys/fs/fuse/fuse_node.c
  projects/fuse2/tests/sys/fs/fusefs/setattr.cc

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