Re: [patch v2] phonet: some signedness bugs

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From: Dan Carpenter <error27@xxxxxxxxx>
Date: Mon, 10 Jan 2011 17:06:58 +0300

> Dan Rosenberg pointed out that there were some signed comparison bugs
> in the phonet protocol.
> 
> http://marc.info/?l=full-disclosure&m=129424528425330&w=2
> 
> The problem is that we check for array overflows but "protocol" is
> signed and we don't check for array underflows.  If you have already
> have CAP_SYS_ADMIN then you could use the bugs to get root, or someone
> could cause an oops by mistake.
> 
> Signed-off-by: Dan Carpenter <error27@xxxxxxxxx>

Applied.
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