proc: fix UAF in proc_get_inode()

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

CVE-2025-21999 · Microsoft / collected KEV context

cve-program · CVE-2025-21999

• https://git.kernel.org/stable/c/eda279586e571b05dff44d48e05f8977ad05855d
• https://git.kernel.org/stable/c/4b0b8445b6fd41e6f62ac90547a0ea9d348de3fa
• https://git.kernel.org/stable/c/966f331403dc3ed04ff64eaf3930cf1267965e53
• https://git.kernel.org/stable/c/63b53198aff2e4e6c5866a4ff73c7891f958ffa4
• https://git.kernel.org/stable/c/ede3e8ac90ae106f0b29cd759aadebc1568f1308
• https://git.kernel.org/stable/c/64dc7c68e040251d9ec6e989acb69f8f6ae4a10b
• https://git.kernel.org/stable/c/654b33ada4ab5e926cd9c570196fefa7bec7c1df

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