CVE-2026-68364
N/A
N/A
Summary
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:
- amdgpu_dm_ism_disable() – quiesces workers, must NOT hold dc_lock.
- amdgpu_dm_ism_force_full_power() (new) – drives the ISM FSM back to FULL_POWER_RUNNING, must hold dc_lock.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 754003486c3cc95f2fcb9d6b71a779047d6db95c < 95776812e6b8f908563e8994d5d947b68baf68a6 | affected |
| Linux | Linux | 754003486c3cc95f2fcb9d6b71a779047d6db95c < 3714fe242592e3699ac5e2c19d68b275a210be7d | affected |
| Linux | Linux | 7.1 | affected |
| Linux | Linux | 0 < 7.1 | unaffected |
| Linux | Linux | 7.1.6 <= 7.1.* | unaffected |
| Linux | Linux | 7.2 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/95776812e6b8f908563e8994d5d947b68baf68a6
- https://git.kernel.org/stable/c/3714fe242592e3699ac5e2c19d68b275a210be7d
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