Re: Rendering issue with view source and large embedded images

Hi,

On Sun, Oct 13, 2024 at 09:23:33PM +0200, [email protected] wrote:
>Rodrigo Arias <[email protected]> wrote:
>
>> One thing that may be easy to try in the meanwhile is to run the same
>> test by from a local HTTP server, so we don't use the file: DPI. If
>> the bug persists, then it is not related with the file DPI. You can
>> use a lightweight web server like darkhttpd.
>
>When opening the test page with the file dpi, the issue is very easy to
>trigger.
>
>When using a local webserver as you suggested, it doesn't seem to
>happen...
>
>However, for example when refreshing the site:
>https://www.da.vidbuchanan.co.uk/blog/dram-emfi.html
>I still see stuff like this:
>
>** WARNING **: CCC: call on already finished chain. Flags=CCC_Aborted
>IO_write, closing with pending data not sent:
>"ntZ1uGVvMRmC5GANpBI4569aV...
>
>And eventual glitching and crash after many refreshes.
>
>So, I'm not sure this is actually a dpi issue, but maybe that just
>exposes it more.

Ah, interesting. It seems to be time sensitive then. That's probably why 
I'm not able to see it. Do you have a particularly fast or slow machine?

>To sum it up, I don't know shit, but guessing:
>A double free is leading to a buffer overrun on the chain to the data
>uri parser.

Yes, there is a double free, but the question is: what leads to that 
condition?

When Dillo detects this "CCC: call on already finished chain", it should 
abort, as this situation should never happen.

Best,
Rodrigo.
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