[Bug 296224] nfs: Memory modified after free (384, malloc-384, NFSCL deleg) + 88 = deadc0dedeadc0dd

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From: <bugzilla-noreply_at_freebsd.org>
Date: Thu, 25 Jun 2026 16:02:55 UTC

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=296224

Rick Macklem <rmacklem@FreeBSD.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|fs@FreeBSD.org              |rmacklem@FreeBSD.org

--- Comment #2 from Rick Macklem <rmacklem@FreeBSD.org> ---
Created attachment 272128
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=272128&action=edit
nfscl_state.c: Add a check for delegation busy

This patch might fix the problem.
Please test this patch and let us
know of any "atomic upgrade.." entries
in the console log (/var/log/messages).

In particular, if you get any of the above
log messages where any of the values are non-zero.

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