nvme-multipath: defer partition scanning

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: nvme-multipath: defer partition scanning We need to suppress the partition scan from occuring within the controller's scan_work context. If a path error occurs here, the IO will wait until a path becomes available or all paths are torn down, but that action also occurs within scan_work, so it would deadlock. Defer the partion scan to a different context that does not block scan_work.

References

• https://git.kernel.org/stable/c/60de2e03f984cfbcdc12fa552f95087c35a05a98
• https://git.kernel.org/stable/c/4a57f42e5ed42cb8f1beb262c4f6d3e698939e4e
• https://git.kernel.org/stable/c/a91b7eddf45afeeb9c5ece11dddff5de0921b00f
• https://git.kernel.org/stable/c/1f021341eef41e77a633186e9be5223de2ce5d48