It's a bind mount of the root filesystem, and previously that bind mount just had whatever permissions the underlying root filesystem had.
Of course, I know that the kernel recently gained support for bind mounts being mounted differently - I wonder whether that means the new mount doesn't inherit in the same way it did before.
mount root ro
bind /dev to /dev/.static/dev
mount root rw
Arguably we should just get rid of /dev/.static/dev anyway, since we utterly don't support a static /dev -- it'd mean that postinsts just succeeded.
I wonder whether that's a kernel change?
It's a bind mount of the root filesystem, and previously that bind mount just had whatever permissions the underlying root filesystem had.
Of course, I know that the kernel recently gained support for bind mounts being mounted differently - I wonder whether that means the new mount doesn't inherit in the same way it did before.
mount root ro
bind /dev to /dev/.static/dev
mount root rw
Arguably we should just get rid of /dev/.static/dev anyway, since we utterly don't support a static /dev -- it'd mean that postinsts just succeeded.