[Bug 222680] bnxt (iflib model): While VLAN TCP Tx is progress, "ifconfig destroy" caused kernel Crash

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=222680

            Bug ID: 222680
           Summary: bnxt (iflib model): While VLAN TCP Tx is progress,
                    "ifconfig destroy" caused kernel Crash
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: bhargava.marreddy at broadcom.com

Repro Steps;- 

1. Boot into FreeBSD rev src_head_322823 
2. Create VLAN interface - 
   ## ifconfig bnxt0.5 create vlan 5 vlandev bnxt0 inet 5.0.0.1/24 
3. Start Tx TCP using Stratus 100G A1 NIC 
4. While Throughput is ~ 90 Gbps, destroy VLAN interface 
   ##ifconfig bnxt0.5 destroy 
5. Server Crashed

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