CVE-2025-38242: Concurrent Execution using Shared Resource with Improper Synchronization

In the Linux kernel, the following vulnerability has been resolved: mm: userfaultfd: fix race of userfaultfdmove and swap cache This commit fixes two kinds of races, they may have different results: Barry reported a BUGON in commit c50f8e6053b0, we may see the same BUGON if the filemap lookup...