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@@ -1415,6 +1415,10 @@ This is fine if you want to do something the kernel programmers thought you'd wa
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But what if you want to do something unusual, to change the behavior of the system in some way?
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Then, you are mostly on your own.
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+Notice that this example has been unavailable since Linux v6.9.
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+Specifically after this \href{https://github.com/torvalds/linux/commit/1e3ad78334a69b36e107232e337f9d693dcc9df2#diff-4a16bf89a09b4f49669a30d54540f0b936ea0224dc6ee9edfa7700deb16c3e11R52}{commit}, due to the system call table changing the implementation from an indirect function call table to a switch statement for security issue, such as Branch History Injection (BHI) attack.
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+See more information \href{https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2060909}{here}.
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+
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Should one choose not to use a virtual machine, kernel programming can become risky.
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For example, while writing the code below, the \cpp|open()| system call was inadvertently disrupted.
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This resulted in an inability to open any files, run programs, or shut down the system, necessitating a restart of the virtual machine.
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Jim Huang