[Bug 93942] [vfs] [patch] panic: ufs_dirbad: bad dir (patch from DragonFly)

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=93942

--- Comment #16 from commit-hook at freebsd.org ---
A commit references this bug:

Author: kib
Date: Wed Jul 20 14:40:57 UTC 2016
New revision: 303090
URL: https://svnweb.freebsd.org/changeset/base/303090

Log:
  Ensure that the UFS directory vnode' vm_object is properly sized
  before UFS_BALLOC() is called.  I do not believe that this caused any
  real issue on FreeBSD because the exclusive vnode lock is held over
  the balloc/resize, the change is to make formally correct KPI use.

  Based on:     the Matthew Dillon' patch from DragonFly BSD
  PR:   93942
  Reviewed by:  mckusick
  Tested by:    pho
  Sponsored by: The FreeBSD Foundation
  MFC after:    1 week

Changes:
  head/sys/ufs/ufs/ufs_lookup.c
  head/sys/ufs/ufs/ufs_vnops.c

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