[Bug 202892] open with O_CREAT | O_DIRECTORY when path references a symlink

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=202892

--- Comment #10 from commit-hook at freebsd.org ---
A commit references this bug:

Author: kib
Date: Wed Sep  9 19:31:09 UTC 2015
New revision: 287599
URL: https://svnweb.freebsd.org/changeset/base/287599

Log:
  For open("name", O_DIRECTORY | O_CREAT), do not try to create the
  named node, open(2) cannot create directories.  But do allow the flag
  combination to succeed if the directory already exists.

  Declare the open("name", O_DIRECTORY | O_CREAT | O_EXCL) always
  invalid for the same reason, since open(2) cannot create directory.

  Note that there is an argument that O_DIRECTORY | O_CREAT should be
  invalid always, regardless of the target directory existence or
  O_EXCL.  The current fix is conservative and allows the call to
  succeed in the situation where it succeeded before the patch.

  Reported by:    Tom Ridge <freebsd at tom-ridge.com>
  Reviewed by:    rwatson
  PR:     202892
  Sponsored by:    The FreeBSD Foundation
  MFC after:    1 week

Changes:
  head/sys/kern/vfs_vnops.c

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