5.15.2 is the last public release of 5.15 and does not contain this CVE
fix. However, >=6.1.2 and >5.12.12 all contain the necessary patches so
let's port them to 5.15.2.
Technically only the first two patches are required to patch the CVE.
However, the second patch introduces a regression that is fixed in the third
patch.
The patches are taken from KDE kde/5.15 git branch.
Cc: Quentin Schulz <foss+buildroot@0leil.net>
Signed-off-by: Quentin Schulz <quentin.schulz@theobroma-systems.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>