nfsd: fix nfs4_openowner leak when concurrent nfsd4_open occur

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

CVE-2024-56779 · Microsoft / collected KEV context

cve-program · CVE-2024-56779

• https://git.kernel.org/stable/c/a85364f0d30dee01c5d5b4afa55a9629a8f36d8e
• https://git.kernel.org/stable/c/2d505a801e57428057563762f67a5a62009b2600
• https://git.kernel.org/stable/c/0ab0a3ad24e970e894abcac58f85c332d1726749
• https://git.kernel.org/stable/c/45abb68c941ebc9a35c6d3a7b08196712093c636
• https://git.kernel.org/stable/c/37dfc81266d3a32294524bfadd3396614f8633ee
• https://git.kernel.org/stable/c/6f73f920b7ad0084373e46121d7ac34117aed652
• https://git.kernel.org/stable/c/98100e88dd8865999dc6379a3356cd799795fe7b

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