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CONTAP-739621: Possible INPCB Leak Preventing UDP Socket Creation

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ontap-9
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Issue

Systems running ONTAP 9.16.1 can experience a severe networking failure which causes the node to become partially unreachable and unresponsive to administrative commands. This is caused by internal failures to create UDP sockets due to a memory leak which prevents different internal systems from communicating with each other.

System logs show repeated socket creation failures returning error 55 (ENOBUFS).

VifMgr: [kern_vifmgr:info:11798] [0x80b45cc00] [vifmgr_virtual_interface_iterator::get_imp] Failed to successfully calculate operational status: Unexpected error "NbladeWriter PCP RPC Error noSocket" encountered as result of getting link status for port(s).

Sktrace: 2026-04-21T18:21:18Z 10034467026364183 [48:0] L3_NET_CONFIG_ERR: fbsd_socreate_wrapper: error: 55

Core analysis can confirm that UDP socket creation failure is due to a memory leak.

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