Re: Fwd: Memory corruption in multithreaded user space program while calling fork

On Tue, 4 Jul 2023 09:00:19 +0100 Greg KH [off-list ref] wrote:

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Thanks! I'll investigate this later today. After discussing with
Andrew, we would like to disable CONFIG_PER_VMA_LOCK by default until
the issue is fixed. I'll post a patch shortly.

Posted at: https://lore.kernel.org/all/20230703182150.2193578-1-surenb@google.com/ (local)

As that change fixes something in 6.4, why not cc: stable on it as well?

Sorry, I thought since per-VMA locks were introduced in 6.4 and this
patch is fixing 6.4 I didn't need to send it to stable for older
versions. Did I miss something?

6.4.y is a stable kernel tree right now, so yes, it needs to be included
there :)

I'm in wait-a-few-days-mode on this.  To see if we have a backportable
fix rather than disabling the feature in -stable.