CVE-2024-44995

In the Linux kernel, the following vulnerability has been resolved:

net: hns3: fix a deadlock problem when config TC during resetting

When config TC during the reset process, may cause a deadlock, the flow is as below: pf reset start │ ▼ …… setup tc │ │ ▼ ▼ DOWN: napi_disable() napi_disable()(skip) │ │ │ ▼ ▼ …… …… │ │ ▼ │ napi_enable() │ ▼ UINIT: netif_napi_del() │ ▼ …… │ ▼ INIT: netif_napi_add() │ ▼ …… global reset start │ │ ▼ ▼ UP: napi_enable()(skip) …… │ │ ▼ ▼ …… napi_disable()

In reset process, the driver will DOWN the port and then UINIT, in this case, the setup tc process will UP the port before UINIT, so cause the problem. Adds a DOWN process in UINIT to fix it.

Weakness

The product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors.

Affected Software

Extended Description

Locking is a type of synchronization behavior that ensures that multiple independently-operating processes or threads do not interfere with each other when accessing the same resource. All processes/threads are expected to follow the same steps for locking. If these steps are not followed precisely - or if no locking is done at all - then another process/thread could modify the shared resource in a way that is not visible or predictable to the original process. This can lead to data or memory corruption, denial of service, etc.

Potential Mitigations

Related Attack Patterns

• https://cwe.mitre.org/data/definitions/25.html
• https://cwe.mitre.org/data/definitions/26.html
• https://cwe.mitre.org/data/definitions/27.html

References

• https://git.kernel.org/stable/c/195918217448a6bb7f929d6a2ffffce9f1ece1cc
• https://git.kernel.org/stable/c/67492d4d105c0a6321b00c393eec96b9a7a97a16
• https://git.kernel.org/stable/c/6ae2b7d63cd056f363045eb65409143e16f23ae8
• https://git.kernel.org/stable/c/be5e816d00a506719e9dbb1a9c861c5ced30a109
• https://git.kernel.org/stable/c/de37408d5c26fc4a296a28a0c96dcb814219bfa1
• https://git.kernel.org/stable/c/fa1d4de7265c370e673583ac8d1bd17d21826cd9
• https://git.kernel.org/stable/c/fc250eca15bde34c4c8f806b9d88f55bd56a992c