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From: Hartmut Brandt <harti@FreeBSD.org>
Date: Thu, 27 Feb 2003 00:43:27 -0800 (PST)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org,
	cvs-all@FreeBSD.org
Subject: cvs commit: src/sys/kern kern_condvar.c kern_synch.c
X-FreeBSD-CVS-Branch: HEAD
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harti       2003/02/27 00:43:27 PST

  Modified files:
    sys/kern             kern_condvar.c kern_synch.c 
  Log:
  When a process has been waiting on a condition variable or mutex the
  td_wmesg field in the thread structure points to the description string of
  the condition variable or mutex. If the condvar or the mutex had been
  initialized from a loadable module that was unloaded in the meantime,
  td_wmesg may now point to invalid memory. Retrieving the process table now
  may panic the kernel (or access junk). Setting the td_wmesg field to NULL
  after unblocking on the condvar/mutex prevents this panic.
  
  PR:             kern/47408
  Approved by:    jake (mentor)
  
  Revision  Changes    Path
  1.37      +1 -0      src/sys/kern/kern_condvar.c
  1.213     +2 -0      src/sys/kern/kern_synch.c

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