seccomp: allow 'rseq' syscall in default seccomp profile #41158
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Flowdalic
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thaJeztah
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Jun 26, 2020
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@justincormack PTAL |
Restartable Sequences (rseq) are a kernel-based mechanism for fast update operations on per-core data in user-space. Some libraries, like the newest version of Google's TCMalloc, depend on it [1]. This also makes dockers default seccomp profile on par with systemd's, which enabled 'rseq' in early 2019 [2]. 1: https://google.github.io/tcmalloc/design.html 2: systemd/systemd@6fee3be Signed-off-by: Florian Schmaus <flo@geekplace.eu>
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thaJeztah
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LGTM, thanks!
(chatted with @justincormack, and he was ok with adding this)
justincormack
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@Flowdalic you'll likely want this in the containerd seccomp profile as well; https://github.com/containerd/containerd/tree/master/contrib/seccomp. Let me know if you want to open a PR there, or want me to open one |
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@thaJeztah Thanks for pointing this out. I've created containerd/containerd#4347 |
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Restartable Sequences (rseq) are a kernel-based mechanism for fast
update operations on per-core data in user-space. Some libraries, like
the newest version of Google's TCMalloc, depend on it [1].
This also makes dockers default seccomp profile on par with systemd's,
which enabled 'rseq' in early 2019 [2].
1: https://google.github.io/tcmalloc/design.html
2: systemd/systemd@6fee3be