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authorIan Lewis <ianlewis@google.com>2020-09-15 23:17:36 -0700
committergVisor bot <gvisor-bot@google.com>2020-09-15 23:19:17 -0700
commitdcd532e2e416aa81ca9ac42dc153731855f91418 (patch)
tree1fd10c9c150d8a0aec67e36d8f87c6910e16ff70 /pkg/sentry/syscalls/linux/flags.go
parentc053c4bb03819a9b9bb4d485000789cb653cd9c7 (diff)
Add support for OCI seccomp filters in the sandbox.
OCI configuration includes support for specifying seccomp filters. In runc, these filter configurations are converted into seccomp BPF programs and loaded into the kernel via libseccomp. runsc needs to be a static binary so, for runsc, we cannot rely on a C library and need to implement the functionality in Go. The generator added here implements basic support for taking OCI seccomp configuration and converting it into a seccomp BPF program with the same behavior as a program generated by libseccomp. - New conditional operations were added to pkg/seccomp to support operations available in OCI. - AllowAny and AllowValue were renamed to MatchAny and EqualTo to better reflect that syscalls matching the conditionals result in the provided action not simply SCMP_RET_ALLOW. - BuildProgram in pkg/seccomp no longer panics if provided an empty list of rules. It now builds a program with the architecture sanity check only. - ProgramBuilder now allows adding labels that are unused. However, backwards jumps are still not permitted. Fixes #510 PiperOrigin-RevId: 331938697
Diffstat (limited to 'pkg/sentry/syscalls/linux/flags.go')
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