Re: BUG: mmapfile/writev spurious zero bytes (x86_64/not i386, bisected,reproducable)

[Andi Kleen]

Linus Torvalds wrote:
> 
> On Tue, 17 Jun 2008, Linus Torvalds wrote:
>> I don't think that code is reasonably salvageable. Damn. 
> 
> Hmm. Something like this *may* salvage it.
> 
> Untested, so far (I'll reboot and test soon enough), but even if it fixes 
> things, it's not really very good. 

If that fixes anything:
- The caller is broken because it shouldn't pass a faulting source to copy_to_user()
- And you broken copy_from_user error reporting which shares the same code

-Andi


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