Re: [CHECKER] potential dereference of user pointer errors

From: Chris Wright (chris@wirex.com)
Date: Thu Mar 27 2003 - 12:10:58 EST

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In reply to: Jan Kasprzak: "Re: [CHECKER] potential dereference of user pointer errors"
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* Jan Kasprzak (kas@informatics.muni.cz) wrote:
> Chris Wright wrote:
> : Both cosa_readmem and cosa_download don't seem to do any validation of
> : the user supplied ptr at all before dereferncing it in get_user. And
> : it'd make sense to use 'code' in cosa_reamdme (as in cosa_download)
> : instead of 'd->code'. Jan, does this look OK?
>
> Yes, you are right. I've missed this. However, it is not
> as bad as it looks like, because you need the CAP_SYS_RAWIO to
> exploit this. I agree this patch should be applied.

Thanks for the confirmation.
-chris

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