On Fri, Mar 21, 2025 at 12:46 PM Blaise Boscaccy <bbosca...@linux.microsoft.com> wrote: > > This adds the Hornet Linux Security Module which provides signature > verification of eBPF programs. > > Hornet uses a similar signature verification scheme similar to that of > kernel modules. A pkcs#7 signature is appended to the end of an > executable file. During an invocation of bpf_prog_load, the signature > is fetched from the current task's executable file. That signature is > used to verify the integrity of the bpf instructions and maps which > where passed into the kernel. Additionally, Hornet implicitly trusts any > programs which where loaded from inside kernel rather than userspace, > which allows BPF_PRELOAD programs along with outputs for BPF_SYSCALL > programs to run. > > Hornet allows users to continue to maintain an invariant that all code > running inside of the kernel has been signed and works well with > light-skeleton based loaders, or any statically generated program that > doesn't require userspace instruction rewriting. > > Signed-off-by: Blaise Boscaccy <bbosca...@linux.microsoft.com> > --- > Documentation/admin-guide/LSM/Hornet.rst | 51 +++++ > crypto/asymmetric_keys/pkcs7_verify.c | 10 + > include/linux/kernel_read_file.h | 1 + > include/linux/verification.h | 1 + > include/uapi/linux/lsm.h | 1 + > security/Kconfig | 3 +- > security/Makefile | 1 + > security/hornet/Kconfig | 11 ++ > security/hornet/Makefile | 4 + > security/hornet/hornet_lsm.c | 239 +++++++++++++++++++++++ > 10 files changed, 321 insertions(+), 1 deletion(-) > create mode 100644 Documentation/admin-guide/LSM/Hornet.rst > create mode 100644 security/hornet/Kconfig > create mode 100644 security/hornet/Makefile > create mode 100644 security/hornet/hornet_lsm.c
A reminder that you'll need to take responsibility for maintaining Hornet and provide a corresponding entry in the MAINTAINERS file too. I'm not nice enough to maintain Hornet for you ;) If you have any questions about any of the fields, let me know. I believe you've seen this already, but as a general FYI we do have some guidelines for new LSMs: https://web.git.kernel.org/pub/scm/linux/kernel/git/pcmoore/lsm.git/tree/README.md -- paul-moore.com
