Description
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.
Metrics
No CVSS score has been published yet.
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 754003486c3cc95f2fcb9d6b71a779047d6db95c, < 95776812e6b8f908563e8994d5d947b68baf68a6; >= 754003486c3cc95f2fcb9d6b71a779047d6db95c, < 3714fe242592e3699ac5e2c19d68b275a210be7d |
| Linux | Linux | 7.1 |
References
Timeline
- Published
- Aug 10, 2026
- Last modified
- Aug 18, 2026
- NVD status
- Received