COMMAND
	    {proc,kern}fs
SYSTEMS AFFECTED
	    FreeBSD 2.2.6-STABLE, 3.0-CURRENT
PROBLEM
	    Brian Feldman found following. This is apparently a bug introduced
	    in 4.4BSD-Lite2; this file's two id's reflect both that it is from
	    4.4BSD-Lite2, and that it was fixed in the FreeBSD-CURRENT  source
	    tree on 6/25/98,  after this bug  was reported, so  anyone running
	    3.0-CURRENT  should  definitely  update  their  {kern,proc}fs   to
	    prevent exploitation.
	    The best way to look for this is to try the following:
	
	        grep hungry < `locate procfs_vnops.c`
	
	    And see if there is any  reference to the following panic (from  a
	    crash core bt):
	
	        #1  0xf0119367 in panic (fmt=0xf5740bc8 "kernfs_readdir: not hungry")
	        at ../../kern/kern_shutdown.c:423
	
	    Any  systems  using  4.4BSD-Lite2  code  should  be  interested in
	    checking this out.  The problem  seems to be in the syscall  usage
	    of Linux programs in the 'emulation', and so far the only  program
	    tested this with is RealPlayer 5.0 for Linux/i386.  Attempting  to
	    browse /proc or /kern will cause a crash on a vulnerable system:
	
	        rvplayer /proc/curproc
	
	    or
	
	        rvplayer /kern/hostname
	
SOLUTION
	    This  was  fixed  in  the  FreeBSD-CURRENT source tree on 6/25/98,
	    after  bug  was  reported,  so  anyone  running 3.0-CURRENT should
	    definitely update their {kern,proc}fs to prevent exploitation.