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NASA used too old #Linux kernel so that I don't the badge 😭😭😭 Which also means: no KASAN/syzkaller but 5'000 bugs on Mars 🤔🤔🤔 Remote cross-planetary PoC somebody?

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Satya Nadella

@satyanadella

Apr 19, 2021

A huge congratulations to NASA and to the thousands of developers whose open source contributions on GitHub helped make this historic mission a success. github.blog/2021-04-19-ope

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It's definitely not 3.4.0, but they're treating it that way to simplify it. It's really 3.4.x with a bunch of out-of-tree drivers, other out-of-tree code and backported patches. It'd be a lot more accurate to refer to the CAF kernel tag rather than the mainline tag from Linus.

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Qualcomm did have CONFIG_STRICT_MEMORY_RWX and other features. They still have downstream kernel hardening that's not upstream. At one point, they had a tiny hypervisor enforcing RO kernel code so the kernel couldn't make itself writable but BPF and other features killed that.

3:20 PM · Apr 24, 2021Twitter Web App

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Pixel 2 had the hypervisor feature enabled IIRC and then that ended up being disabled more recently due to incompatible backported code. It didn't exist in the newer Qualcomm SoC kernel trees due to those same kinds of incompatibilities.