On Fri, 29 Oct 2021 16:54:47 +0800 Li Feng <fengli(a)smartx.com> wrote:[...] Thanks for the detailed explanation. I finally found out that the `qrap` was the root cause. I patched the qemu, and it works well.Have you found out what was the offending syscall? I'll probably hit this later too, but that would help me double checking what the problem was.[...] This background knowledge helped me a lot. The seccomp works well with Fedora 35 without the `qrap`. Thanks again for your great work.You're welcome, I'm glad to hear it works for you! -- Stefano