smb: server: fix active_num_conn leak on transport allocation failure

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

CVE-2026-31711 · Microsoft / collected KEV context

cve-program · CVE-2026-31711

• https://git.kernel.org/stable/c/dc2e7d595d68cf1be1ba64e3d30ebf3266bf7242
• https://git.kernel.org/stable/c/60734c8bc3b4aa0672e251f08dda81977e4b5387
• https://git.kernel.org/stable/c/97f8d2648ef4871e4cd335e2d769cb40054a6772
• https://git.kernel.org/stable/c/295a9fc6789d1011c36ded9f0f2907bb34fa0de4
• https://git.kernel.org/stable/c/283027aa93380380a0994f35dde3ec95318f2654
• https://git.kernel.org/stable/c/fb48185bcd946d42de7017cf27f912f8ab26acf0
• https://git.kernel.org/stable/c/6551300dc452ac16a855a83dbd1e74899542d3b3

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