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From: "Kenneth D. Merry" <ken@FreeBSD.org>
Date: Tue, 31 May 2011 22:39:32 +0000 (UTC)
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Subject: cvs commit: src/sys/kern subr_msgbuf.c
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ken         2011-05-31 22:39:32 UTC

  FreeBSD src repository

  Modified files:
    sys/kern             subr_msgbuf.c 
  Log:
  SVN rev 222550 on 2011-05-31 22:39:32Z by ken
  
  Fix a bug introduced in revision 222537.
  
  In msgbuf_reinit() and msgbuf_init(), we weren't initializing the mutex.
  Depending on the contents of memory, the LO_INITIALIZED flag might be
  set on the mutex (either due to a warm reboot, and the message buffer
  remaining in place, or due to garbage in memory) and in that case, with
  INVARIANTS turned on, we would trigger an assertion that the mutex had
  already been initialized.
  
  Fix this by bzeroing the message buffer mutex for the _init() and _reinit()
  paths.
  
  Reported by:    mdf
  
  Revision  Changes    Path
  1.5       +2 -0      src/sys/kern/subr_msgbuf.c