CVE-2024-35819
soc: fsl: qbman: Use raw spinlock for cgr_lock
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Description
In the Linux kernel, the following vulnerability has been resolved: soc: fsl: qbman: Use raw spinlock for cgr_lock smp_call_function always runs its callback in hard IRQ context, even on PREEMPT_RT, where spinlocks can sleep. So we need to use a raw spinlock for cgr_lock to ensure we aren't waiting on a sleeping task. Although this bug has existed for a while, it was not apparent until commit ef2a8d5478b9 ("net: dpaa: Adjust queue depth on rate change") which invokes smp_call_function_single via qman_update_cgr_safe every time a link goes up or down.
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/2b3fede8225133671ce837c0d284804aa3bc7a02
- https://git.kernel.org/stable/c/32edca2f03a6cc42c650ddc3ad83d086e3f365d1
- https://git.kernel.org/stable/c/54d26adf64c04f186098b39dba86b86037084baa
- https://git.kernel.org/stable/c/9a3ca8292ce9fdcce122706c28c3f07bc857fe5e
- https://git.kernel.org/stable/c/cd53a8ae5aacb4ecd25088486dea1cd02e74b506
References (11)
SSVC — Action Prioritization
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
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