Re: [Qemu-devel] [PULL 00/18] Block layer patches

[John Snow]

On 09/29/2016 01:18 PM, Peter Maydell wrote:
> On 29 September 2016 at 03:25, Kevin Wolf <address@hidden> wrote:
> > The series contains a patch that reduces the coroutine stack size, so I
> > guess it's not quite infinite, but pretty deep recursion anyway. I will
> > drop that final patch that reduces the stack size and hope that the rest
> > will pass your testing (I tried some more to reproduce it, but I still
> > didn't manage to).
>
> Ah, I see. I suspect the clang build (since it has the sanitizer
> enabled) is a worst-case for stack usage.
>
> Is it possible for a guest to issue a sufficiently large
> request that it blows the stack, or is that capped
> somehow?
>
> thanks
> -- PMM

If the qtest can blow the stack, so can a guest. In practice it does not 
happen that guests send requests so large, but mum's the word on a 
naughty guest.

--js