CVE-2025-21802 Information

Description

In the Linux kernel the following vulnerability has been resolved:

net: hns3: fix oops when unload drivers paralleling

When unload hclge driver it tries to disable sriov first for each ae_dev node from hnae3_ae_dev_list. If user unloads hns3 driver at the time because it removes all the ae_dev nodes and it may cause oops.

But we can’t simply use hnae3_common_lock for this. Because in the process flow of pci_disable_sriov() it will trigger the remove flow of VF which will also take hnae3_common_lock.

To fixes it introduce a new mutex to protect the unload process.

Reference

https://git.kernel.org/stable/c/82736bb83fb0221319c85c2e9917d0189cd84e1e https://git.kernel.org/stable/c/92e5995773774a3e70257e9c95ea03518268bea5 https://git.kernel.org/stable/c/b5a8bc47aa0a4aa8bca5466dfa2d12dbb5b3cd0c https://git.kernel.org/stable/c/cafe9a27e22736d4a01b3933e36225f9857c7988 https://git.kernel.org/stable/c/e876522659012ef2e73834a0b9f1cbe3f74d5fad