[PATCH 00/59] LSM: Module stacking for AppArmor
Stephen Smalley
stephen.smalley at gmail.com
Wed Apr 10 12:52:27 UTC 2019
On Tue, Apr 9, 2019 at 5:40 PM Casey Schaufler <casey at schaufler-ca.com> wrote:
>
> This patchset provides the changes required for
> the AppArmor security module to stack safely with
> "exclusive" security modules, those being SELinux and
> Smack.
What's the use case? Who would use such support?
>
> Performance: Using a kernel compile benchmark indicates
> a performance impact of 0.15% for a Fedora 29 system
> with SELinux. Adding AppArmor has an additional 0.20%
> impact. Fedora does not include an AppArmor profile.
>
> A new process attribute identifies which security module
> information should be reported by SO_PEERSEC and the
> /proc/.../attr/current interface. This is provided by
> /proc/.../attr/display. Writing the name of the security
> module desired to this interface will set which LSM hooks
> will be called for this information. The first security
> module providing the hooks will be used by default.
>
> The use of integer based security tokens (secids) is
> generally (but not completely) replaced by a structure
> lsm_export. The lsm_export structure can contain information
> for each of the security modules that export information
> outside the LSM layer.
>
> The LSM interfaces that provide "secctx" text strings
> have been changed to use a structure "lsm_context"
> instead of a pointer/length pair. In some cases the
> interfaces used a "char *" pointer and in others a
> "void *". This was necessary to ensure that the correct
> release mechanism for the text is used. It also makes
> many of the interfaces cleaner.
>
> The security module stacking issues around netlabel
> not addressed here as they are beyond what is required
> to stack AppArmor with either SELinux or Smack.
>
> git://github.com/cschaufler/lsm-stacking.git#stack-5.1-rc2-apparmor
>
> Signed-off-by: Casey Schaufler <casey at schaufler-ca.com>
> ---
> drivers/android/binder.c | 25 ++-
> fs/kernfs/dir.c | 6 +-
> fs/kernfs/inode.c | 31 ++-
> fs/kernfs/kernfs-internal.h | 3 +-
> fs/nfs/inode.c | 13 +-
> fs/nfs/internal.h | 8 +-
> fs/nfs/nfs4proc.c | 17 +-
> fs/nfs/nfs4xdr.c | 16 +-
> fs/nfsd/nfs4proc.c | 8 +-
> fs/nfsd/nfs4xdr.c | 14 +-
> fs/nfsd/vfs.c | 7 +-
> fs/proc/base.c | 1 +
> include/linux/cred.h | 3 +-
> include/linux/lsm_hooks.h | 93 ++++----
> include/linux/nfs4.h | 8 +-
> include/linux/security.h | 137 ++++++++----
> include/net/netlabel.h | 10 +-
> include/net/scm.h | 14 +-
> kernel/audit.c | 43 ++--
> kernel/audit.h | 9 +-
> kernel/auditfilter.c | 6 +-
> kernel/auditsc.c | 77 ++++---
> kernel/cred.c | 15 +-
> net/ipv4/cipso_ipv4.c | 13 +-
> net/ipv4/ip_sockglue.c | 12 +-
> net/netfilter/nf_conntrack_netlink.c | 29 ++-
> net/netfilter/nf_conntrack_standalone.c | 16 +-
> net/netfilter/nfnetlink_queue.c | 38 ++--
> net/netfilter/nft_meta.c | 13 +-
> net/netfilter/xt_SECMARK.c | 14 +-
> net/netlabel/netlabel_kapi.c | 5 +-
> net/netlabel/netlabel_unlabeled.c | 101 +++++----
> net/netlabel/netlabel_unlabeled.h | 2 +-
> net/netlabel/netlabel_user.c | 13 +-
> net/netlabel/netlabel_user.h | 2 +-
> net/unix/af_unix.c | 11 +-
> security/apparmor/audit.c | 4 +-
> security/apparmor/include/audit.h | 2 +-
> security/apparmor/include/net.h | 6 +-
> security/apparmor/include/secid.h | 9 +-
> security/apparmor/lsm.c | 64 ++----
> security/apparmor/secid.c | 42 ++--
> security/integrity/ima/ima.h | 14 +-
> security/integrity/ima/ima_api.c | 9 +-
> security/integrity/ima/ima_appraise.c | 6 +-
> security/integrity/ima/ima_main.c | 34 +--
> security/integrity/ima/ima_policy.c | 19 +-
> security/security.c | 366 ++++++++++++++++++++++++++++----
> security/selinux/hooks.c | 259 +++++++++++-----------
> security/selinux/include/audit.h | 5 +-
> security/selinux/include/objsec.h | 42 +++-
> security/selinux/netlabel.c | 25 +--
> security/selinux/ss/services.c | 18 +-
> security/smack/smack.h | 18 ++
> security/smack/smack_lsm.c | 238 +++++++++++----------
> security/smack/smack_netfilter.c | 8 +-
> security/smack/smackfs.c | 12 +-
> 57 files changed, 1252 insertions(+), 781 deletions(-)
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