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Re: [virt-tools-list] [PATCH virt-viewer 15/19] Hook up handling of Monitors



Hi

On Tue, Jul 17, 2012 at 5:09 PM, Christophe Fergeau <cfergeau redhat com> wrote:
> Ok, so monitors_max is a guint, the second argument to g_ptr_array_set_size
> is a gint, and the GPtrArray code doesn't seem to handle. A quick reading
> of GPtrArray code didn't make me feel confident that it would do the right
> thing when size > G_INT_MAX / sizeof(void *), which could cause a buffer
> overflow when very huge values are used (I haven't carefully checked that).

G_INT_MAX / sizeof(void *) ? where did you get the / sizeof(void*) from?

Eh ok, so you want to check if max_monitors > G_INT_MAX.. :) a very
unlikely condition that will crash the client anyway. But fine by me.

>> There is nothing wrong in OOM if the server tells us we have 1024
>> maximum monitors on the guest for example,
>
> Is this max value coming from the server, or is it the guest qxl driver
> telling the server about how many monitors it supports?

It's configured at xorg level, with NumHeads option, defaulting to 4.

-- 
Marc-André Lureau


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