mm: avoid overflows in dirty throttling logic

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CVE-2024-42131 · Microsoft / collected KEV context

cve-program · CVE-2024-42131

• https://git.kernel.org/stable/c/2b2d2b8766db028bd827af34075f221ae9e9efff
• https://git.kernel.org/stable/c/4d3817b64eda07491bdd86a234629fe0764fb42a
• https://git.kernel.org/stable/c/7a49389771ae7666f4dc3426e2a4594bf23ae290
• https://git.kernel.org/stable/c/a25e8536184516b55ef89ab91dd2eea429de28d2
• https://git.kernel.org/stable/c/c83ed422c24f0d4b264f89291d4fabe285f80dbc
• https://git.kernel.org/stable/c/bd16a7ee339aef3ee4c90cb23902afb6af379ea0
• https://git.kernel.org/stable/c/8e0b5e7f2895eccef5c2a0018b589266f90c4805
• https://git.kernel.org/stable/c/385d838df280eba6c8680f9777bfa0d0bfe7e8b2

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