In the Linux kernel, the following vulnerability has been resolved:

cpu: hotplug: Preserve per instance callback errors

cpuhp_invoke_callback() unwinds earlier callbacks for the same
hotplug state when one instance fails. The rollback path currently
reuses ret, so a successful rollback can hide the original error and
make the failed transition look successful.

Keep the rollback result separate from the original error.

https://git.kernel.org/stable/c/673db10729fb121ea1b16fe57791a0cb9eac1eb5

https://git.kernel.org/stable/c/77d4fa8a3ea1c3e8b996ac35e59aee9e77389905

https://git.kernel.org/stable/c/7a68257b90d8a9b6d605abc99469ded45ecba63b

https://git.kernel.org/stable/c/95232281512b15338549171ed9a2acf21f946ffb

https://git.kernel.org/stable/c/9f7dc355f62c011e4afe8286cf71130d4bfb9d80

https://git.kernel.org/stable/c/ef39758637cc5b603fb05b625c45a98aa306e338

https://git.kernel.org/stable/c/f77117530fc3f5932ffb107182a6dd34006be9b6

https://git.kernel.org/stable/c/fe9c8d641f6991614d1229a3ffd3e33b879bba9c

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