Bug 2376027 (CVE-2025-38094)

Summary: CVE-2025-38094 kernel: net: cadence: macb: Fix a possible deadlock in macb_halt_tx.
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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OS: Linux   
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Description OSIDB Bzimport 2025-07-03 08:01:14 UTC 
In the Linux kernel, the following vulnerability has been resolved:

net: cadence: macb: Fix a possible deadlock in macb_halt_tx.

There is a situation where after THALT is set high, TGO stays high as
well. Because jiffies are never updated, as we are in a context with
interrupts disabled, we never exit that loop and have a deadlock.

That deadlock was noticed on a sama5d4 device that stayed locked for days.

Use retries instead of jiffies so that the timeout really works and we do
not have a deadlock anymore.
Comment 1 Avinash Hanwate 2025-07-03 20:52:39 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025070324-CVE-2025-38094-1b5c@gregkh/T