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Ebpf Seccomp Filters [Lwn.net]

Di: Everly

A few notes: * We expose prog_id in the ebpf dump as the pointer to the ebpf program in kernel memory, since this is unique. I’m not sure if this is safe. The goal of exposing

Seccomp-BPF（Berkeley Packet Filter）是Linux内核中的一种安全机制，用于限制进程对系统调用的访问权限。它主要用于防止恶意软件对系统的攻击，提高系统的安全性。

Revisiting eBPF Seccomp Filters

XDP – eXpress Data Path An in-kernel network fast-path - ppt download

这样就极大地提高了Seccomp防护生产力。 整个eBPF结合Seccomp过程如图所示： 学习模式-开始收集syscall： 对业务容器进行syscall学习，当Pod开启学习时，seccomp controller会先

Seccomp, short for “Secure Computing”, is a Linux kernel feature designed to filter system calls made by a process thread. It allows user space security agents to define a restricted set of

* eBPF – seccomp uses BPF but there is also eBPF, which to my understanding allows us to not only filter syscalls based on their number but also gives the ability to look at

To this end, we create a new Seccomp-eBPF program type which is highly programmable for users to express advanced system call security policies in eBPF filter programs. Specifi-cally,

  • Programmable System Call Security with eBPF
  • What is Seccomp in Kubernetes?
  • 【云安全系列】eBPF——云原生容器防护力
  • eBPF verifier — The Linux Kernel documentation

BERKELEY PACKET FILTER: theory, practice and perspectives

seccomp-ebpf is an experimental tool designed to convert seccomp profiles (in JSON format) into gadgets (eBPF programs). This project was developed as a practical experiment for the

TLDR; This blog post will introduce seccomp and how you can leverage its features in higher level languages, and what you gain from that. It is loosely based on my

to improve programmability of system call security. A new eBPF filter mode in Seccomp that loads and allocates the filter. “What’s the reason for adding eBPF support? seccomp shouldn’t need

传递 SECCOMP_FILTER_FLAG_NEW_LISTENER 参数给 seccomp() 系统调用可以取 得通知文件描述符： fd = seccomp (SECCOMP_SET_MODE_FILTER,

Specifically, to show that eBPF for Seccomp is necessary, we describe several security features we build using eBPF Seccomp filters, the integration with container runtime

Monitor everything you run in K8s without compromising on cost, granularity, or scale. No description, website, or topics provided. Contribute to Soil-Security/awesome-bpf

The function bpf_prog_run(filter, ctx) transparently invokes eBPF interpreter or JITed code to run the filter. ‘filter’ is a pointer to struct bpf_prog that we got from bpf_prog_create(), and ‘ctx’ the

Can eBPF modify the return value or parameters of a syscall?

Limitation of cBPF •Stateless: only support staticallow/deny lists •Size limit: complex policies cannot be encoded in one filter [1] •Simple instruction set: cannot use advanced utilities

Seccomp（安全计算模式）是 Linux 内核中的一种功能，它可以用来限制进程可以执行的系统调用。这是一种沙盒机制，用于限制应用程序可以访问的系统资源，从而提高系统的安全性

Lutomirski responded (more than once) that some use cases do exist. He mentioned seccomp(), which still uses the old „classic BPF“ language rather than the

Seccomp filtering provides a means for a process to specify a filter for incoming system calls. The filter is expressed as a Berkeley Packet Filter (BPF) program, as with socket filters, except that

To better understand this overhead, we identify and explore three techniques for per-process filtering for eBPF: post-eBPF, in-eBPF, and pre-eBPF filtering, finding that all three approaches

Our evaluation shows that our eBPF-based filtering can enhance existing policies (e.g., reducing the attack surface of early execution phase by up to 55.4% for temporal

What is Seccomp in Kubernetes?

The seccomp filter system uses the Berkley Packet Filter system. Combined with argument checking and the many possible filter return values (kill, trap, trace, errno), this is allows for

The eBPF maintainers have made it a policy that cBPF is frozen and no new features can be added to it — if we want to use any new features we’d need to port seccomp to

As with other in-kernel BPF users, seccomp filters are converted to extended BPF (eBPF) internally. But there are plans to allow filters written in eBPF (rather than „classic“

Brauner said that he would like to explore adding at least some limited support for eBPF to seccomp() filters. For a long time, new system calls with pointer arguments were

In my kernels source code I don’t have the seccomp examples. To search for it you could try to grep it from the git log (e.g. git log –oneline | grep „eBPF Seccomp filters“). It’s

Parent article: eBPF seccomp() filters Hmmn, instead of doing an updater (old to new), I wonder if one could simply reject all the dangerous bits, and allow authors to use the newer notation so

eBPF(extended Berkeley Packet Filter)はLinuxカーネルが提供する機能の一つで、カーネル空間で動作する仮想マシン(Virtual Machine)で、主にネットワークパケットやシス

rformance benchmark results. To show that it is safe, we further describe the use of root-only eBPF Seccomp in container-based use cases, which strictly obey current kernel security

This patchset enables seccomp filters to be written in eBPF. Although, this patchset doesn’t introduce much of the functionality enabled by eBPF, it lays the ground work

Moving seccomp () to eBPF has been an often-requested change, but security concerns have prevented that from happening. The latest attempt to enable eBPF is this patch