Hi Daniel,

thanks for this regression report.

On  Mo 30 Dez 2019 14:01:04 CET, Daniel Reichelt wrote:

Hi all,

the new use-after-free patches introduced in 0.9.11+dfsg-1.3~deb10u2
hurt connections to servers provided by x11vnc.

Previously, a server initiated by

x11vnc -nopw -auth guess -display :0 -forever

was perfectly fine to connect to using tightvncviewer. Now, with
~deb10u2, the remote windows of tightvncviewer comes up for a fraction
of a second and then immediately closes with the message "Unknown
encoding". Nothing changed on the involved systems besides
libvncserver1/libvncclient1.

Reverting only the use-after-free patches, re-building libvncserver1 and
starting x11vnc using that package, tightvncviewer can connect again.

Also, this issue does NOT appear when libvncserver1/testing
(0.9.12+dfsg-5) is installed.


Cheers
Daniel

Does this upstream commit being added to the patches in +deb10u2 fix your issue?
https://github.com/LibVNC/libvncserver/commit/7e63df224aa45a8b541cd63a870594454aba7526.patch

Could you test this?

Thanks,
Mike
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