RE: [PATCH] clone3: validate stack arguments

[David Laight]

From: Christian Brauner
> Sent: 31 October 2019 11:36
...
> /* Intentional user visible API change */
> clone3() was released with 5.3. Currently, it is not documented and very
> unclear to userspace how the stack and stack_size argument have to be
> passed. After talking to glibc folks we concluded that trying to change
> clone3() to setup the stack instead of requiring userspace to do this is
> the right course of action.

What happens if someone 'accidentally' runs a program compiled for
the new API on a system running the existing 5.3 kernel?

While it won't work, it needs to die reasonably gracefully.

	David

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