net: hns3: fix oops when unload drivers paralleling

Vulnerability 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.

References

• https://git.kernel.org/stable/c/622d92a67656e5c4d2d6ccac02d688ed995418c6
• https://git.kernel.org/stable/c/8c640dd3d900cc8988a39c007591f1deee776df4
• https://git.kernel.org/stable/c/e876522659012ef2e73834a0b9f1cbe3f74d5fad
• https://git.kernel.org/stable/c/b5a8bc47aa0a4aa8bca5466dfa2d12dbb5b3cd0c
• https://git.kernel.org/stable/c/82736bb83fb0221319c85c2e9917d0189cd84e1e
• https://git.kernel.org/stable/c/cafe9a27e22736d4a01b3933e36225f9857c7988
• https://git.kernel.org/stable/c/92e5995773774a3e70257e9c95ea03518268bea5