From owner-cvs-all  Wed Mar 14  7:19: 3 2001
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From: Cameron Grant <cg@FreeBSD.org>
Date: Wed, 14 Mar 2001 07:18:58 -0800 (PST)
To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: cvs commit: src/sys/dev/sound/pcm datatypes.h dsp.c sound.c
X-FreeBSD-CVS-Branch: RELENG_4
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cg          2001/03/14 07:18:58 PST

  Modified files:        (Branch: RELENG_4)
    sys/dev/sound/pcm    datatypes.h dsp.c sound.c 
  Log:
  MFC: fix a panic triggerable by anyone with read/write access to the audio
  devices.  opening /dev/{dsp,dspW,audio}0 and then opening a different device
  from that list and closing it resulted in a panic when any operation is
  performed on the first fd.
  
  we prevent this happening by denying the second open unless it uses the same
  minor device as the first.
  
  PR:             kern/25519
  Approved by:	jkh
  
  Revision  Changes    Path
  1.8.2.7   +2 -2      src/sys/dev/sound/pcm/datatypes.h
  1.15.2.7  +5 -1      src/sys/dev/sound/pcm/dsp.c
  1.17.2.7  +7 -1      src/sys/dev/sound/pcm/sound.c


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