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From: Konstantin Belousov <kib@FreeBSD.org>
Date: Fri, 15 May 2009 19:23:05 +0000 (UTC)
To: cvs-src-old@freebsd.org
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Subject: cvs commit: src/sys/fs/devfs devfs_vnops.c
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kib         2009-05-15 19:23:05 UTC

  FreeBSD src repository

  Modified files:
    sys/fs/devfs         devfs_vnops.c 
  Log:
  SVN rev 192151 on 2009-05-15 19:23:05Z by kib
  
  Devfs replaces file ops vector with devfs-specific one in devfs_open(),
  before the struct file is fully initialized in vn_open(), in particular,
  fp->f_vnode is NULL. Other thread calling file operation before f_vnode
  is set results in NULL pointer dereference in devvn_refthread().
  
  Initialize f_vnode before calling d_fdopen() cdevsw method, that might
  set file ops too.
  
  Reported and tested by: Chris Timmons <cwt networks cwu edu>
          (RELENG_7 version)
  MFC after:      3 days
  
  Revision  Changes    Path
  1.178     +3 -1      src/sys/fs/devfs/devfs_vnops.c