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    This is actually one argument for running potentially exploitable code as a separate non-privileged user and hoping there is no privilege escalation vulnerability in the OS. Or Docker. Commented Mar 27, 2018 at 10:55
  • @immibis Android uses the Linux kernel and an ext FS. It doesn't share any other similarities afaik. Don't conflate Linux and UNIX-like (or GNU/Linux). (At least you didn't call FreeBSD "Linux"..) Commented Mar 27, 2018 at 16:19
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    @wizzwizz4 Linux is a kernel, Android uses the kernel called Linux, I'm not sure what your point is. Commented Mar 27, 2018 at 22:05
  • @Willtech It technically does work as a security measure, but it's pretty inconvenient. You generally want apps to be able to access your files, after all. But only the files you told them to access. Commented Mar 28, 2018 at 3:28
  • @immibis The permissions aren't implemented in the kernel, so it's misleading to imply that Android is based on a system that includes the permission model. (IIirc the kernel enforces some of the permissions though..) Commented Mar 28, 2018 at 6:34