[Bug 272958] jail creation failure with vnet epair leaves host interface lingering

From: <bugzilla-noreply_at_freebsd.org>
Date: Sun, 06 Aug 2023 20:47:28 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=272958

--- Comment #7 from Alex Seitsinger <alexseitsinger@gmail.com> ---
1. Start a jail
2. Using exec.created/exec.poststart, successfully move the epair interface
into the jail via ifconfig vnet.
3. Run another script via exec.created/exec.poststart, but have it fail,
causing the jail's creation to fail and exit.
4. Observe that the first epair interface still exists on the host via
ifconfig.
5. Some seconds to minutes following this, the kernel will panic and reboot the
system.

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