CVE-2024-56683
drm/vc4: hdmi: Avoid hang with debug registers when suspended
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Description
In the Linux kernel, the following vulnerability has been resolved: drm/vc4: hdmi: Avoid hang with debug registers when suspended Trying to read /sys/kernel/debug/dri/1/hdmi1_regs when the hdmi is disconnected results in a fatal system hang. This is due to the pm suspend code disabling the dvp clock. That is just a gate of the 108MHz clock in DVP_HT_RPI_MISC_CONFIG, which results in accesses hanging AXI bus. Protect against this.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- https://git.kernel.org/stable/c/0ea29bd7d9400d3629683244d609358ed1b12075
- https://git.kernel.org/stable/c/16f351adf733a182224ad24916d7673aa6df02df
- https://git.kernel.org/stable/c/223ee2567a55e4f80315c768d2969e6a3b9fb23d
- https://git.kernel.org/stable/c/74f21be9990a42dc2357bcf87a13e16c6998b90e
- https://git.kernel.org/stable/c/c7d474974954d9af7e0092021223d58f2de128df
References (6)
CVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
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