UNKNOWN NVD
CVE-2026-97411
In the Linux kernel, the following vulnerability has been resolved: net: ibm: emac: mal: fix potential system hang in mal_remove() napi_disable() is not idemp
In the Linux kernel, the following vulnerability has been resolved:
net: ibm: emac: mal: fix potential system hang in mal_remove()
napi_disable() is not idempotent and calling it on an already-disabled
or unenabled NAPI context will cause the kernel to spin indefinitely
waiting for the NAPI_STATE_SCHED bit to clear.
In mal_remove(), napi_disable() is called unconditionally. If no MACs were
registered, NAPI was never enabled. Also, if they were registered but
subsequently unregistered, NAPI was already disabled in
mal_unregister_commac(). In either case, calling napi_disable() causes
the kernel to hang upon module removal.
Fix this by only calling napi_disable() in mal_remove() if the commac list
is not empty (which implies NAPI is enabled).
References
- https://git.kernel.org/stable/c/7c5d41f87f079990bf241359e3c1332d8d10fe87
- https://git.kernel.org/stable/c/c4cb9a728df66c46067b26263f5beb633aae4087
- https://git.kernel.org/stable/c/f6c1aad9b35fa083f48ce0c5926204891d82e089
This unknown severity vulnerability was published on 2026-09-24 via NVD.
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