> On Aug 17, 2015, at 12:16, Borislav Petkov <b...@suse.de> wrote: > > On Mon, Aug 17, 2015 at 11:27:01AM +0800, yalin wang wrote: >> i just want the x86 copy_from{to,in}_user() function have >> the same behaviour as other platforms. > > Back to the original question from 2 mails ago: > > How else would we be able to use the same function in copy_to and > copy_from variants? > >> and can disclose potential BUGs in kernel, if do like this. > > Back to my other question: > > Do you have any real life examples where you can trigger such bugs or is > this only "potential"? > > IOW, what I *think* you're trying to do sounds to me like unnecessary > complication with no apparent gain *at* *all*. So show me why you want > to do it: code it up, trigger a bug and show me why your version is > better. No "but but it might be a good idea", no "potentially maybe", > none of that maybe stuff. Write it, send it with instructions how > someone else can apply it and trigger the issue. Ok? > > i will loop you in a patch mail, for kcore driver rely on x86 copy_to_user() feature like this , but not true on other platforms .
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