sctp: add mutual exclusion in proc_sctp_do_udp_port()

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

CVE-2025-22062 · Microsoft / collected KEV context

cve-program · CVE-2025-22062

• https://git.kernel.org/stable/c/65ccb2793da7401772a3ffe85355c831b313c59f
• https://git.kernel.org/stable/c/386507cb6fb7cdef598ddcb3f0fa37e6ca9e789d
• https://git.kernel.org/stable/c/b3598f53211ba1025485306de2733bdd241311a3
• https://git.kernel.org/stable/c/e5178bfc55b3a78000f0f8298e7ade88783ce581
• https://git.kernel.org/stable/c/efb8cb487be8f4ba6aaef616011d702d6a083ed1
• https://git.kernel.org/stable/c/d3d7675d77622f6ca1aae14c51f80027b36283f8
• https://git.kernel.org/stable/c/10206302af856791fbcc27a33ed3c3eb09b2793d

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