CVE-2026-68364

In the Linux kernel, the following vulnerability has been resolved:

drm/amd/display: Fix ISM dc_lock deadlock during suspend

[Why]

System hang observed during suspend/resume while video is playing.

amdgpu_dm_ism_disable() is called under dc_lock and waits for ISM

delayed work via disable_delayed_work_sync(). The work handlers

themselves take dc_lock, producing an ABBA deadlock when a worker is

in flight at suspend time.

[How]

Split the disable path into two phases with opposite locking

contracts:

1. amdgpu_dm_ism_disable() -- quiesces workers, must NOT hold

dc_lock.

2. amdgpu_dm_ism_force_full_power() (new) -- drives the ISM FSM

back to FULL_POWER_RUNNING, must hold dc_lock.