Re: RETBleed: WARNING: Spectre v2 mitigation leaves CPU vulnerable to RETBleed attacks, data leaks possible!

On Thu, Jul 14, 2022 at 02:15:07PM +0530, Naresh Kamboju wrote:

Results from Linaro’s test farm.

We are booting the i386 kernel on an x86 machine. With Spectre V2 patches merged into Linux mainline we have been noticing RETBleed: WARNING: Spectre v2 mitigation leaves CPU vulnerable to RETBleed attacks, data leaks possible!

That's funny. I don't think that's a valid combination that should be cared about, but I'll leave it to Pawan to comment if it is something that is "real" to be concerned for.

thanks,

greg k-h