On Thu, Apr 19, 2012 at 09:15:40AM -0500, Eric Sandeen wrote:
> On 4/19/12 8:10 AM, Jouko Orava wrote:
> > I'd also like to point at the real bug here, in Jouni's original strace:
> >
> > writev(3, [{"\0\0\0\0\0\0\0\0", 8}, {"", 2147483648}], 2) = -2147483640
> >
> > The syscall returns a negative value, which is not the actual number of
> > bytes written (since it is 32-bit wrapped), and errno has not been
> > changed. There is no way for userspace to handle this result correctly!
> >
> > There is no way anyone sane should just gloss over this saying
> > "programmer fault, you're doing it wrong".
> > This is a real bug, and deserves fixing sooner rather than later.
>
> Agreed, I think Dave was a little to quick on the draw on his reply. :)
I was pointing the -EFAULT error in the second syscall which was
just being passed the 2GB sized buffer, not the above error from the
first syscall.
Cheers,
Dave.
--
Dave Chinner
david@xxxxxxxxxxxxx
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