Hi Tycho, On 09/27/2018 05:11 PM, Tycho Andersen wrote:
Hi all, Here's v7 of the seccomp trap to userspace set. There are various minor changes and bug fixes, but two major changes: * We now pass fds to the tracee via an ioctl, and do it immediately when the ioctl is called. For this we needed some help from the vfs, so I've put the one patch in this series and cc'd fsdevel. This does have the advantage that the feature is now totally decoupled from the rest of the set, which is itself useful (thanks Andy!) * Instead of putting all of the notification related stuff into the struct seccomp_filter, it now lives in its own struct notification, which is pointed to by struct seccomp_filter. This will save a lot of memory (thanks Tyler!)
Is there a documentation (man page) patch for this API change? Thanks, Michael
v6 discussion: https://lkml.org/lkml/2018/9/6/769 Thoughts welcome, Tycho Tycho Andersen (6): seccomp: add a return code to trap to userspace seccomp: make get_nth_filter available outside of CHECKPOINT_RESTORE seccomp: add a way to get a listener fd from ptrace files: add a replace_fd_files() function seccomp: add a way to pass FDs via a notification fd samples: add an example of seccomp user trap Documentation/ioctl/ioctl-number.txt | 1 + .../userspace-api/seccomp_filter.rst | 89 +++ fs/file.c | 22 +- include/linux/file.h | 8 + include/linux/seccomp.h | 14 +- include/uapi/linux/ptrace.h | 2 + include/uapi/linux/seccomp.h | 42 +- kernel/ptrace.c | 4 + kernel/seccomp.c | 527 ++++++++++++++- samples/seccomp/.gitignore | 1 + samples/seccomp/Makefile | 7 +- samples/seccomp/user-trap.c | 312 +++++++++ tools/testing/selftests/seccomp/seccomp_bpf.c | 607 +++++++++++++++++- 13 files changed, 1617 insertions(+), 19 deletions(-) create mode 100644 samples/seccomp/user-trap.c
