Hi, Here is a new mailing list for application developers to ask questions about Landlock and collaborate. This mailing list is also a place to send patches to user space applications (in CC) to support Landlock. The linux-security-module@xxxxxxxxxxxxxxx mailing list should still be used for kernel development though. You can subscribe or just freely send emails to landlock@xxxxxxxxxxxxxxx: https://subspace.kernel.org/lists.linux.dev.html Regards, Mickaël On 02/05/2021 04:02, pr-tracker-bot@xxxxxxxxxx wrote: > The pull request you sent on Wed, 28 Apr 2021 12:54:22 +1000 (AEST): > >> git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security.git tags/landlock_v34 > > has been merged into torvalds/linux.git: > https://git.kernel.org/torvalds/c/17ae69aba89dbfa2139b7f8024b757ab3cc42f59 > > Thank you! > On 28/04/2021 04:54, James Morris wrote: > Hi Linus, > > This patchset adds a new LSM called Landlock, from Mickaël Salaün. > > Briefly, Landlock provides for unprivileged application sandboxing. > >>From Mickaël's cover letter: > > The goal of Landlock is to enable to restrict ambient rights (e.g. > global filesystem access) for a set of processes. Because Landlock is a > stackable LSM [1], it makes possible to create safe security sandboxes > as new security layers in addition to the existing system-wide > access-controls. This kind of sandbox is expected to help mitigate the > security impact of bugs or unexpected/malicious behaviors in user-space > applications. Landlock empowers any process, including unprivileged > ones, to securely restrict themselves. > > Landlock is inspired by seccomp-bpf but instead of filtering syscalls > and their raw arguments, a Landlock rule can restrict the use of kernel > objects like file hierarchies, according to the kernel semantic. > Landlock also takes inspiration from other OS sandbox mechanisms: XNU > Sandbox, FreeBSD Capsicum or OpenBSD Pledge/Unveil. > > In this current form, Landlock misses some access-control features. > This enables to minimize this patch series and ease review. This series > still addresses multiple use cases, especially with the combined use of > seccomp-bpf: applications with built-in sandboxing, init systems, > security sandbox tools and security-oriented APIs [2]. > > [1] https://lore.kernel.org/lkml/50db058a-7dde-441b-a7f9-f6837fe8b69f@xxxxxxxxxxxxxxxx/ > [2] https://lore.kernel.org/lkml/f646e1c7-33cf-333f-070c-0a40ad0468cd@xxxxxxxxxxx/ > > The cover letter and v34 posting is here: > https://lore.kernel.org/linux-security-module/20210422154123.13086-1-mic@xxxxxxxxxxx/ > > See also: https://landlock.io/ > > This code has had extensive design discussion and review over several > years. The v33 code has been in next since April 9, and was updated last > week to v34 with a relatively simple change. If you prefer to pull v33 > instead, please pull "tags/landlock_v33" instead, and we'll push the > change through after merging. > > There's a merge conflict in the syscall tables, with resolution by > Stephen Rothwell: > https://lore.kernel.org/linux-next/20210409143954.22329cfa@xxxxxxxxxxxxxxxx/ > > Al Viro raised some issues re. the VFS in v31: > https://lore.kernel.org/linux-security-module/YGUslUPwp85Zrp4t@xxxxxxxxxxxxxxxxxxxxx/ > > which were addressed in comments and in v33: > https://lore.kernel.org/linux-security-module/5f4dfa1-f9ac-f31f-3237-dcf976cabbfc@xxxxxxxxx/ > > > Please pull. > > --- > > The following changes since commit 1e28eed17697bcf343c6743f0028cc3b5dd88bf0: > > Linux 5.12-rc3 (2021-03-14 14:41:02 -0700) > > are available in the Git repository at: > > git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security.git tags/landlock_v34 > > for you to fetch changes up to 3532b0b4352ce79400b0aa68414f1a0fc422b920: > > landlock: Enable user space to infer supported features (2021-04-22 12:22:11 -0700) > > ---------------------------------------------------------------- > Add Landlock, a new LSM from Mickaël Salaün <mic@xxxxxxxxxxxxxxxxxxx> > > ---------------------------------------------------------------- > Casey Schaufler (1): > LSM: Infrastructure management of the superblock > > Mickaël Salaün (12): > landlock: Add object management > landlock: Add ruleset and domain management > landlock: Set up the security framework and manage credentials > landlock: Add ptrace restrictions > landlock: Support filesystem access-control > fs,security: Add sb_delete hook > arch: Wire up Landlock syscalls > landlock: Add syscall implementations > selftests/landlock: Add user space tests > samples/landlock: Add a sandbox manager example > landlock: Add user and kernel documentation > landlock: Enable user space to infer supported features > > Documentation/security/index.rst | 1 + > Documentation/security/landlock.rst | 85 + > Documentation/userspace-api/index.rst | 1 + > Documentation/userspace-api/landlock.rst | 311 +++ > MAINTAINERS | 15 + > arch/Kconfig | 7 + > arch/alpha/kernel/syscalls/syscall.tbl | 3 + > arch/arm/tools/syscall.tbl | 3 + > arch/arm64/include/asm/unistd.h | 2 +- > arch/arm64/include/asm/unistd32.h | 6 + > arch/ia64/kernel/syscalls/syscall.tbl | 3 + > arch/m68k/kernel/syscalls/syscall.tbl | 3 + > arch/microblaze/kernel/syscalls/syscall.tbl | 3 + > arch/mips/kernel/syscalls/syscall_n32.tbl | 3 + > arch/mips/kernel/syscalls/syscall_n64.tbl | 3 + > arch/mips/kernel/syscalls/syscall_o32.tbl | 3 + > arch/parisc/kernel/syscalls/syscall.tbl | 3 + > arch/powerpc/kernel/syscalls/syscall.tbl | 3 + > arch/s390/kernel/syscalls/syscall.tbl | 3 + > arch/sh/kernel/syscalls/syscall.tbl | 3 + > arch/sparc/kernel/syscalls/syscall.tbl | 3 + > arch/um/Kconfig | 1 + > arch/x86/entry/syscalls/syscall_32.tbl | 3 + > arch/x86/entry/syscalls/syscall_64.tbl | 3 + > arch/xtensa/kernel/syscalls/syscall.tbl | 3 + > fs/super.c | 1 + > include/linux/lsm_hook_defs.h | 1 + > include/linux/lsm_hooks.h | 4 + > include/linux/security.h | 4 + > include/linux/syscalls.h | 7 + > include/uapi/asm-generic/unistd.h | 8 +- > include/uapi/linux/landlock.h | 137 ++ > kernel/sys_ni.c | 5 + > samples/Kconfig | 7 + > samples/Makefile | 1 + > samples/landlock/.gitignore | 1 + > samples/landlock/Makefile | 13 + > samples/landlock/sandboxer.c | 238 ++ > security/Kconfig | 11 +- > security/Makefile | 2 + > security/landlock/Kconfig | 21 + > security/landlock/Makefile | 4 + > security/landlock/common.h | 20 + > security/landlock/cred.c | 46 + > security/landlock/cred.h | 58 + > security/landlock/fs.c | 692 ++++++ > security/landlock/fs.h | 70 + > security/landlock/limits.h | 21 + > security/landlock/object.c | 67 + > security/landlock/object.h | 91 + > security/landlock/ptrace.c | 120 + > security/landlock/ptrace.h | 14 + > security/landlock/ruleset.c | 473 ++++ > security/landlock/ruleset.h | 165 ++ > security/landlock/setup.c | 40 + > security/landlock/setup.h | 18 + > security/landlock/syscalls.c | 451 ++++ > security/security.c | 51 +- > security/selinux/hooks.c | 58 +- > security/selinux/include/objsec.h | 6 + > security/selinux/ss/services.c | 3 +- > security/smack/smack.h | 6 + > security/smack/smack_lsm.c | 35 +- > tools/testing/selftests/Makefile | 1 + > tools/testing/selftests/landlock/.gitignore | 2 + > tools/testing/selftests/landlock/Makefile | 24 + > tools/testing/selftests/landlock/base_test.c | 266 +++ > tools/testing/selftests/landlock/common.h | 183 ++ > tools/testing/selftests/landlock/config | 7 + > tools/testing/selftests/landlock/fs_test.c | 2791 ++++++++++++++++++++++++ > tools/testing/selftests/landlock/ptrace_test.c | 337 +++ > tools/testing/selftests/landlock/true.c | 5 + > 72 files changed, 6986 insertions(+), 77 deletions(-) > create mode 100644 Documentation/security/landlock.rst > create mode 100644 Documentation/userspace-api/landlock.rst > create mode 100644 include/uapi/linux/landlock.h > create mode 100644 samples/landlock/.gitignore > create mode 100644 samples/landlock/Makefile > create mode 100644 samples/landlock/sandboxer.c > create mode 100644 security/landlock/Kconfig > create mode 100644 security/landlock/Makefile > create mode 100644 security/landlock/common.h > create mode 100644 security/landlock/cred.c > create mode 100644 security/landlock/cred.h > create mode 100644 security/landlock/fs.c > create mode 100644 security/landlock/fs.h > create mode 100644 security/landlock/limits.h > create mode 100644 security/landlock/object.c > create mode 100644 security/landlock/object.h > create mode 100644 security/landlock/ptrace.c > create mode 100644 security/landlock/ptrace.h > create mode 100644 security/landlock/ruleset.c > create mode 100644 security/landlock/ruleset.h > create mode 100644 security/landlock/setup.c > create mode 100644 security/landlock/setup.h > create mode 100644 security/landlock/syscalls.c > create mode 100644 tools/testing/selftests/landlock/.gitignore > create mode 100644 tools/testing/selftests/landlock/Makefile > create mode 100644 tools/testing/selftests/landlock/base_test.c > create mode 100644 tools/testing/selftests/landlock/common.h > create mode 100644 tools/testing/selftests/landlock/config > create mode 100644 tools/testing/selftests/landlock/fs_test.c > create mode 100644 tools/testing/selftests/landlock/ptrace_test.c > create mode 100644 tools/testing/selftests/landlock/true.c >
