Darren J Moffat wrote:
> In my opinion the check first then try style is wrong. It is likely
> introducing a Time Of Check To Time Of Use (TOCTTOU) bug. In some cases
> this could cause a security vulnerability. Also if the operation will
> succeed you have wasted cycles asking first. If it is going to fail
> the check in ddi_copy{in,out} will be just as fast as an explicit call
> to check it first.
I agree with you, and determined that we won't do this on Solaris. To be
verified for Linux.
> Not knowing what you are really doing I'm guessing but I wonder if
> devmap_default_access(9F) and devmap_access(9E) might help you.
Thanks, will check them.
Joachim
--
Joachim Worringen, Software Architect, Dolphin Interconnect Solutions
phone ++49/(0)228/324 08 17 - http://www.dolphinics.com
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