[PATCH 6.6.y 0/2] firmware: backport CVE-2026-93083, CVE-2026-93093

[Artem Dinaburg]

Hi Greg, Sasha, and maintainers,

I'm working through the smaller CVE backports still missing from 6.6.y.
These 2 upstream changes belong together for CVE-2026-93083,
CVE-2026-93093. They must be applied in this order because the later change
depends on or completes the earlier one.

The complete series is already present in 6.12.y, 6.18.y, and 7.2.y.
Patch 1 also affects 6.1.y and will need a separate backport; this
series contains only the 6.6.y patches.

Could you please consider this series for 6.6.y?

Thanks,
Artem Dinaburg

Series:
  1. firmware: arm_scmi: Publish channel state before callbacks
  2. firmware: arm_scmi: Unwind TX receiver mailbox setup failure

base: v6.6.157 (79643295eba17affbd16ca97f3ef04c90266b28c) plus stable-queue
revision 958ddf240a33ef26b1771be944f0ea6c3b597472