So in the commit below we switched how the socket family of calls are exposed at the syscall level (which was a 4.3-rc1 change):
commit 9dea5dc921b5f4045a18c63eb92e84dc274d17eb Author: Andy Lutomirski <l...@kernel.org> Date: Tue Jul 14 15:24:24 2015 -0700 x86/entry/syscalls: Wire up 32-bit direct socket calls One of the stated goals of this was to expose these calls for seccomp mediation and to bring 32bit in line with 64bit. So it is cirtain we never did do seccomp mediation on these before. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1526358 Title: adding seccomp rule for socket() fails on i386 since kernel 4.3 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libseccomp/+bug/1526358/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs