CVE-2023-53623 mm/swap: fix swap_info_struct race between swapoff and get_swap_pages()

In the Linux kernel, the following vulnerability has been resolved: mm/swap: fix swapinfostruct race between swapoff and getswappages The si-lock must be held when deleting the si from the available list. Otherwise, another thread can re-add the si to the available list, which can lead to memory...