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From: Konstantin Belousov <kib@FreeBSD.org>
Date: Tue, 20 Apr 2010 10:19:27 +0000 (UTC)
To: cvs-src-old@freebsd.org
X-FreeBSD-CVS-Branch: HEAD
Subject: cvs commit: src/sys/fs/pseudofs pseudofs_vnops.c src/sys/kern
 vfs_cache.c src/sys/ufs/ufs ufs_lookup.c
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kib         2010-04-20 10:19:27 UTC

  FreeBSD src repository

  Modified files:
    sys/fs/pseudofs      pseudofs_vnops.c 
    sys/kern             vfs_cache.c 
    sys/ufs/ufs          ufs_lookup.c 
  Log:
  SVN rev 206894 on 2010-04-20 10:19:27Z by kib
  
  The cache_enter(9) function shall not be called for doomed dvp.
  Assert this.
  
  In the reported panic, vdestroy() fired the assertion "vp has namecache
  for ..", because pseudofs may end up doing cache_enter() with reclaimed
  dvp, after dotdot lookup temporary unlocked dvp.
  Similar problem exists in ufs_lookup() for "." lookup, when vnode
  lock needs to be upgraded.
  
  Verify that dvp is not reclaimed before calling cache_enter().
  
  Reported and tested by: pho
  Reviewed by:    kan
  MFC after:      2 weeks
  
  Revision  Changes    Path
  1.82      +1 -1      src/sys/fs/pseudofs/pseudofs_vnops.c
  1.161     +2 -0      src/sys/kern/vfs_cache.c
  1.102     +8 -0      src/sys/ufs/ufs/ufs_lookup.c