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Joined 2 years ago
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Cake day: August 30th, 2023

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  • Ah yes, the “extended Berkeley Packet Filter”.
    Wikipedia:

    eBPF is a technology that can run programs in a privileged context such as the operating system kernel.

    Phoronix:

    Hornet uses a similar signature verification scheme similar to that of kernel modules. A pkcs#7 signature is appended to the end of an executable file. During an invocation of bpf_prog_load, the signature is fetched from the current task’s executable file. That signature is used to verify the integrity of the bpf instructions and maps which where passed into the kernel. Additionally, Hornet implicitly trusts any programs which where loaded from inside kernel rather than userspace, which allows BPF_PRELOAD programs along with outputs for BPF_SYSCALL programs to run.

    So this is to make kernel-level instructions from userspace (something that’s already happening) more secure.

    The thread linked by the OP is Jarkko Sakkinen (kernel maintainer) seemingly saying “show your work, your patch is full of nonsense” in a patch submitted for review to the Linux kernel.
    Edit: the OP has edited the link, it used to point to this comment in the mailing list chain.













  • All of the technically-minded posts I’ve read about systemd have been positive. The only detractors seem to be the ones with less technical knowledge, complaining about “the Unix philosophy” and parroting half-understood ideas, or worse, claiming that it’s bad because they have to learn it.

    I know xorg has problems, but it was good to get some insight into why Wayland is falling short. Every argument I’ve seen in favor of Wayland has been “xorg bad”.