mm/ksm: fix flag-dropping behavior in ksm_madvise

These records connect through source-stated identifiers. Shared identifiers or dates alone do not establish shared exposure, root cause or applicability.

CVE-2025-40040 · Microsoft / collected KEV context

cve-program · CVE-2025-40040

• https://git.kernel.org/stable/c/850f1ea245bdc0ce6a3fd36bfb80d8cf9647cb71
• https://git.kernel.org/stable/c/788e5385d0ff69cdba1cabccb9dab8d9647b9239
• https://git.kernel.org/stable/c/b69f19244c2b6475c8a6eb72f0fb0d53509e48cd
• https://git.kernel.org/stable/c/41cb9fd904fe0c39d52e82dd84dc3c96b7aa9693
• https://git.kernel.org/stable/c/92b82e232b8d8b116ac6e57aeae7a6033db92c60
• https://git.kernel.org/stable/c/ac50c6e0a8f91a02b681af81abb2362fbb67cc18
• https://git.kernel.org/stable/c/76385629f45740b7888f8fcd83bde955b10f61fe
• https://git.kernel.org/stable/c/f04aad36a07cc17b7a5d5b9a2d386ce6fae63e93

No related operational record is retained in the current change model.