mm/smaps: fix race between smaps_hugetlb_range and migration

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AZL-70952 CVE-2025-39754 affecting package kernel 5.15.200.1-1

In the Linux kernel, the following vulnerability has been resolved: mm/smaps: fix race between smapshugetlbrange and migration smapshugetlbrange handles the pte without holdling ptl, and may be concurrenct with migration, leaing to BUGON in pfnswapentrytopage. The race is as follows...