[Bug 286759] Fatal trap 12: page fault while in kernel mode - Melonax NIC on FreeBSD14.2

From: <bugzilla-noreply_at_freebsd.org>
Date: Tue, 13 May 2025 07:15:27 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=286759

            Bug ID: 286759
           Summary: Fatal trap 12: page fault while in kernel mode  -
                    Melonax NIC on FreeBSD14.2
           Product: Base System
           Version: 14.2-RELEASE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: karthickhari1995gamer@gmail.com

Created attachment 260367
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=260367&action=edit
kernel panic log

I’m running a reverse proxy setup as a clustered environment. Recently, two of
the nodes unexpectedly rebooted due to a kernel panic, where the kernel
attempted to access an invalid memory address. I'm not sure why this issue
occurred suddenly, or why it affected only these two specific servers and never
happened again so far.

For context, both affected servers are virtual machines running on separate KVM
hosts and having Mellanox NIC cards. The exception appears to have occurred
during the tcp_default_output function, though I’m not certain of the exact
root cause.

Unfortunately, crash dumps were not enabled at the time. As such, I only have
the kernel panic messages from dmesg for reference, which I have attached here

Also, I’d like to check whether this is a known issue or if there’s any ongoing
analysis related to it.

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