* [uml-devel] Re: Hostaudio module parameters
@ 2003-10-05 20:20 Steve Schmidtke
2003-10-05 22:59 ` Adam Heath
2003-10-06 18:45 ` BlaisorBlade
0 siblings, 2 replies; 4+ messages in thread
From: Steve Schmidtke @ 2003-10-05 20:20 UTC (permalink / raw)
To: blaisorblade_spam; +Cc: user-mode-linux-devel, jdike
[-- Attachment #1: Type: text/html, Size: 1912 bytes --]
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [uml-devel] Re: Hostaudio module parameters
2003-10-05 20:20 Steve Schmidtke
@ 2003-10-05 22:59 ` Adam Heath
2003-10-06 18:45 ` BlaisorBlade
1 sibling, 0 replies; 4+ messages in thread
From: Adam Heath @ 2003-10-05 22:59 UTC (permalink / raw)
To: Steve Schmidtke; +Cc: blaisorblade_spam, user-mode-linux-devel, jdike
On Sun, 5 Oct 2003, Steve Schmidtke wrote:
> This could be abused to allow reading and writing arbitrary files on the host by loading the module with parameters within the UML.
Use filemap.
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* Re: [uml-devel] Re: Hostaudio module parameters
2003-10-05 20:20 Steve Schmidtke
2003-10-05 22:59 ` Adam Heath
@ 2003-10-06 18:45 ` BlaisorBlade
1 sibling, 0 replies; 4+ messages in thread
From: BlaisorBlade @ 2003-10-06 18:45 UTC (permalink / raw)
To: user-mode-linux-devel
Alle 22:20, domenica 5 ottobre 2003, Steve Schmidtke ha scritto:
[Don't bother me for the Uml. the message I'm answering to was in HTML and my
mailer didn't strip tags. It's not my fault]
> <html><div style='background-color:'><DIV>
> <P>>Since hostaudio can be also a module, it's useful to specify the
> host dsp and </P> <P>>mixer position even on module loading. So I've
> added two params with </P></DIV> <DIV></DIV>>descriptions for this. The
> patch is straightforward and non-intrusive, so <DIV></DIV>>please apply
> it.
> <DIV></DIV>
> <DIV></DIV>
> <P>This could be abused to allow reading and writing arbitrary files on the
> host by loading the module with parameters within the UML.
But if the host hasn't DevFS, the paths are wrong, so the hostaudio won't work
as a module. A solution is needed(not compiling it as a module is fine, but
it's a workaround).
So, I could move the uml_setup strings out of hostaudio_kern.c, so that the
boot time params are always read(and conditionalize them to the fact that
CONFIG_HOSTAUDIO or whatever is set to at least M, if possible). Then both if
hostaudio is a module and if if is statically linked, it will read the
boot-time params.
For hostfs, which could have the same problem if modularized, the problem
doesn't happen because it can't be a module. Or maybe, on module loading the
uml_setup parameters should be considered anyway(this is a general solution,
and maybe hard, but is not a bad idea).
However, if the driver works for arbitrary file, wouldn't it be easy to use it
for Unix socket forwarding(in the V1-needs list, on the site)?
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Paolo Giarrusso, aka Blaisorblade
Linux Kernel 2.4.21/2.6.0-test on an i686; Linux registered user n. 292729
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* [uml-devel] Re: Hostaudio module parameters
[not found] <200310051810.56462.blaisorblade_spam@yahoo.it>
@ 2003-11-09 20:34 ` Jeff Dike
0 siblings, 0 replies; 4+ messages in thread
From: Jeff Dike @ 2003-11-09 20:34 UTC (permalink / raw)
To: BlaisorBlade; +Cc: user-mode-linux-devel, Steve Schmidtke
blaisorblade_spam@yahoo.it said:
> Since hostaudio can be also a module, it's useful to specify the host
> dsp and mixer position even on module loading. So I've added two
> params with descriptions for this. The patch is straightforward and
> non-intrusive, so please apply it.
Applied. I pulled the duplicate help text out so there aren't two copies
of it.
Jeff
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2003-11-09 20:34 ` [uml-devel] Re: Hostaudio module parameters Jeff Dike
2003-10-05 20:20 Steve Schmidtke
2003-10-05 22:59 ` Adam Heath
2003-10-06 18:45 ` BlaisorBlade
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