Date: Wed, 14 Mar 2001 07:18:58 -0800 (PST) From: Cameron Grant <cg@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/dev/sound/pcm datatypes.h dsp.c sound.c Message-ID: <200103141518.f2EFIw910673@freefall.freebsd.org>
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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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