[Bug 289017] [lagg] A time-of-check to time-of-use (TOCTOU) race exists in the Link Aggregation (LAGG) network subsystem

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From: <bugzilla-noreply_at_freebsd.org>
Date: Sun, 14 Dec 2025 19:17:00 UTC

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=289017

--- Comment #5 from Gui-Dong Han <hanguidong02@gmail.com> ---
Created attachment 266194
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=266194&action=edit
poc.c

poc.c: A multi-threaded C program that floods the interface with UDP packets.
It utilizes CPU affinity to maximize contention and is designed to persist
through network errors, ensuring continuous pressure on the lagg driver during
state transitions.

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