Re: [Qemu-devel] [PATCH] ui/vnc.c: Fix crash with VNC

[Marek Vasut <marex@denx.de>]

Dear Gerhard Wiesinger,

> On 10.11.2012 00:52, Peter Maydell wrote:
> > On 10 November 2012 00:45, Marek Vasut <marex@denx.de> wrote:
> >> Gerd Hoffmann wrote:
> >>> Question is just whenever we'll go silently fixup stuff in console.c or
> >>> use assert()s to enforce callers getting this correct.  I'd tend to use
> >>> assert() as vmware-vga passing bogous stuff there IMHO indicates there
> >>> is a bug in vmware-vga.
> >> 
> >> Or rather some revisions of the guest X driver.
> > 
> > If qemu's vmware-vga is blithely trusting what the guest driver
> > hands it then that is itself a bug...
> > 
> > To answer Gerd's question, I think I'd go for clip rather than assert
> > (especially at this point in the release cycle), though I don't feel
> > very strongly about it.
> 
> I'd go for clipping rather than asserting too (no crash) in all layers
> as a defensive approach (console.c/vnc.c).

Won't that be an unnecessary slowdown?

> Additionally logging that
> condition would be helpful that the arising bug (which occurred several
> times with a lot of unapplied fixes) can be detected by users easily and
> fixed accordingly.


Sounds good.

> Ciao,
> Gerhard

Best regards,
Marek Vasut