[Bug 257218] pfi_ifnet leak on interface removal

From: <bugzilla-noreply_at_freebsd.org>
Date: Fri, 16 Jul 2021 15:35:18 UTC

            Bug ID: 257218
           Summary: pfi_ifnet leak on interface removal
           Product: Base System
           Version: 13.0-RELEASE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: nreilly@blackberry.com

Created attachment 226498
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=226498&action=edit
Suggested diff

The detach of the interface and group were leaving pfi_ifnet memory behind.
Doing an unref on the kif frees it up if this is the last reference.

On interface detach, the group deletion was notified first and then a change
notification was sent. This would recreate the group in the kif layer. Reorder
the change to before the delete.

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