Re: BUG REPORT: User/Kernel Pointer bug in sys_poll

[Alan Cox]

On Iau, 2004-10-28 at 10:48, Andrew Morton wrote:
> is safe.  We know that the address is in the 0x00000000-0xbfffffff range by
> the time we call __put_user().  And if the page at *addr it not writeable
> the kernel will take a fault.
> 
> So I see no hole.  But I wouldn't have coded it that way...

On x86 maybe. I think he's right in the sense that we may have a non x86
platform that this is not safe on.

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