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Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security

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Pull security layer updates from James Morris:
 "Highlights:

   - major AppArmor update: policy namespaces & lots of fixes

   - add /sys/kernel/security/lsm node for easy detection of loaded LSMs

   - SELinux cgroupfs labeling support

   - SELinux context mounts on tmpfs, ramfs, devpts within user
     namespaces

   - improved TPM 2.0 support"

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (117 commits)
  tpm: declare tpm2_get_pcr_allocation() as static
  tpm: Fix expected number of response bytes of TPM1.2 PCR Extend
  tpm xen: drop unneeded chip variable
  tpm: fix misspelled "facilitate" in module parameter description
  tpm_tis: fix the error handling of init_tis()
  KEYS: Use memzero_explicit() for secret data
  KEYS: Fix an error code in request_master_key()
  sign-file: fix build error in sign-file.c with libressl
  selinux: allow changing labels for cgroupfs
  selinux: fix off-by-one in setprocattr
  tpm: silence an array overflow warning
  tpm: fix the type of owned field in cap_t
  tpm: add securityfs support for TPM 2.0 firmware event log
  tpm: enhance read_log_of() to support Physical TPM event log
  tpm: enhance TPM 2.0 PCR extend to support multiple banks
  tpm: implement TPM 2.0 capability to get active PCR banks
  tpm: fix RC value check in tpm2_seal_trusted
  tpm_tis: fix iTPM probe via probe_itpm() function
  tpm: Begin the process to deprecate user_read_timer
  tpm: remove tpm_read_index and tpm_write_index from tpm.h
  ...
This commit is contained in:
Linus Torvalds 2017-02-21 12:49:56 -08:00
commit c9341ee0af
86 changed files with 4281 additions and 2255 deletions
Download patch file Download diff file Expand all files Collapse all files

197
security/apparmor/include/policy.h
View file

@ -18,6 +18,7 @@
#include <linux/capability.h>
#include <linux/cred.h>
#include <linux/kref.h>
#include <linux/rhashtable.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/socket.h>
@ -27,8 +28,14 @@
#include "capability.h"
#include "domain.h"
#include "file.h"
#include "lib.h"
#include "resource.h"
struct aa_ns;
extern int unprivileged_userns_apparmor_policy;
extern const char *const aa_profile_mode_names[];
#define APPARMOR_MODE_NAMES_MAX_INDEX 4
@ -42,7 +49,7 @@ extern const char *const aa_profile_mode_names[];
#define PROFILE_IS_HAT(_profile) ((_profile)->flags & PFLAG_HAT)
#define PROFILE_INVALID(_profile) ((_profile)->flags & PFLAG_INVALID)
#define profile_is_stale(_profile) ((_profile)->flags & PFLAG_STALE)
#define on_list_rcu(X) (!list_empty(X) && (X)->prev != LIST_POISON2)
@ -67,7 +74,7 @@ enum profile_flags {
PFLAG_USER_DEFINED = 0x20, /* user based profile - lower privs */
PFLAG_NO_LIST_REF = 0x40, /* list doesn't keep profile ref */
PFLAG_OLD_NULL_TRANS = 0x100, /* use // as the null transition */
PFLAG_INVALID = 0x200, /* profile replaced/removed */
PFLAG_STALE = 0x200, /* profile replaced/removed */
PFLAG_NS_COUNT = 0x400, /* carries NS ref count */
/* These flags must correspond with PATH_flags */
@ -76,70 +83,6 @@ enum profile_flags {
struct aa_profile;
/* struct aa_policy - common part of both namespaces and profiles
* @name: name of the object
* @hname - The hierarchical name
* @list: list policy object is on
* @profiles: head of the profiles list contained in the object
*/
struct aa_policy {
char *name;
char *hname;
struct list_head list;
struct list_head profiles;
};
/* struct aa_ns_acct - accounting of profiles in namespace
* @max_size: maximum space allowed for all profiles in namespace
* @max_count: maximum number of profiles that can be in this namespace
* @size: current size of profiles
* @count: current count of profiles (includes null profiles)
*/
struct aa_ns_acct {
int max_size;
int max_count;
int size;
int count;
};
/* struct aa_namespace - namespace for a set of profiles
* @base: common policy
* @parent: parent of namespace
* @lock: lock for modifying the object
* @acct: accounting for the namespace
* @unconfined: special unconfined profile for the namespace
* @sub_ns: list of namespaces under the current namespace.
* @uniq_null: uniq value used for null learning profiles
* @uniq_id: a unique id count for the profiles in the namespace
* @dents: dentries for the namespaces file entries in apparmorfs
*
* An aa_namespace defines the set profiles that are searched to determine
* which profile to attach to a task. Profiles can not be shared between
* aa_namespaces and profile names within a namespace are guaranteed to be
* unique. When profiles in separate namespaces have the same name they
* are NOT considered to be equivalent.
*
* Namespaces are hierarchical and only namespaces and profiles below the
* current namespace are visible.
*
* Namespace names must be unique and can not contain the characters :/\0
*
* FIXME TODO: add vserver support of namespaces (can it all be done in
* userspace?)
*/
struct aa_namespace {
struct aa_policy base;
struct aa_namespace *parent;
struct mutex lock;
struct aa_ns_acct acct;
struct aa_profile *unconfined;
struct list_head sub_ns;
atomic_t uniq_null;
long uniq_id;
struct dentry *dents[AAFS_NS_SIZEOF];
};
/* struct aa_policydb - match engine for a policy
* dfa: dfa pattern match
* start: set of start states for the different classes of data
@ -151,11 +94,24 @@ struct aa_policydb {
};
struct aa_replacedby {
struct aa_proxy {
struct kref count;
struct aa_profile __rcu *profile;
};
/* struct aa_data - generic data structure
* key: name for retrieving this data
* size: size of data in bytes
* data: binary data
* head: reserved for rhashtable
*/
struct aa_data {
char *key;
u32 size;
char *data;
struct rhash_head head;
};
/* struct aa_profile - basic confinement data
* @base - base components of the profile (name, refcount, lists, lock ...)
@ -163,7 +119,7 @@ struct aa_replacedby {
* @rcu: rcu head used when removing from @list
* @parent: parent of profile
* @ns: namespace the profile is in
* @replacedby: is set to the profile that replaced this profile
* @proxy: is set to the profile that replaced this profile
* @rename: optional profile name that this profile renamed
* @attach: human readable attachment string
* @xmatch: optional extended matching for unconfined executables names
@ -180,13 +136,14 @@ struct aa_replacedby {
*
* @dents: dentries for the profiles file entries in apparmorfs
* @dirname: name of the profile dir in apparmorfs
* @data: hashtable for free-form policy aa_data
*
* The AppArmor profile contains the basic confinement data. Each profile
* has a name, and exists in a namespace. The @name and @exec_match are
* used to determine profile attachment against unconfined tasks. All other
* attachments are determined by profile X transition rules.
*
* The @replacedby struct is write protected by the profile lock.
* The @proxy struct is write protected by the profile lock.
*
* Profiles have a hierarchy where hats and children profiles keep
* a reference to their parent.
@ -201,8 +158,8 @@ struct aa_profile {
struct rcu_head rcu;
struct aa_profile __rcu *parent;
struct aa_namespace *ns;
struct aa_replacedby *replacedby;
struct aa_ns *ns;
struct aa_proxy *proxy;
const char *rename;
const char *attach;
@ -219,37 +176,39 @@ struct aa_profile {
struct aa_caps caps;
struct aa_rlimit rlimits;
struct aa_loaddata *rawdata;
unsigned char *hash;
char *dirname;
struct dentry *dents[AAFS_PROF_SIZEOF];
struct rhashtable *data;
};
extern struct aa_namespace *root_ns;
extern enum profile_mode aa_g_profile_mode;
void __aa_update_proxy(struct aa_profile *orig, struct aa_profile *new);
void aa_add_profile(struct aa_policy *common, struct aa_profile *profile);
bool aa_ns_visible(struct aa_namespace *curr, struct aa_namespace *view);
const char *aa_ns_name(struct aa_namespace *parent, struct aa_namespace *child);
int aa_alloc_root_ns(void);
void aa_free_root_ns(void);
void aa_free_namespace_kref(struct kref *kref);
struct aa_namespace *aa_find_namespace(struct aa_namespace *root,
const char *name);
void aa_free_replacedby_kref(struct kref *kref);
struct aa_profile *aa_alloc_profile(const char *name);
struct aa_profile *aa_new_null_profile(struct aa_profile *parent, int hat);
void aa_free_proxy_kref(struct kref *kref);
struct aa_profile *aa_alloc_profile(const char *name, gfp_t gfp);
struct aa_profile *aa_new_null_profile(struct aa_profile *parent, bool hat,
const char *base, gfp_t gfp);
void aa_free_profile(struct aa_profile *profile);
void aa_free_profile_kref(struct kref *kref);
struct aa_profile *aa_find_child(struct aa_profile *parent, const char *name);
struct aa_profile *aa_lookup_profile(struct aa_namespace *ns, const char *name);
struct aa_profile *aa_match_profile(struct aa_namespace *ns, const char *name);
struct aa_profile *aa_lookupn_profile(struct aa_ns *ns, const char *hname,
size_t n);
struct aa_profile *aa_lookup_profile(struct aa_ns *ns, const char *name);
struct aa_profile *aa_fqlookupn_profile(struct aa_profile *base,
const char *fqname, size_t n);
struct aa_profile *aa_match_profile(struct aa_ns *ns, const char *name);
ssize_t aa_replace_profiles(void *udata, size_t size, bool noreplace);
ssize_t aa_remove_profiles(char *name, size_t size);
ssize_t aa_replace_profiles(struct aa_ns *view, struct aa_profile *profile,
bool noreplace, struct aa_loaddata *udata);
ssize_t aa_remove_profiles(struct aa_ns *view, struct aa_profile *profile,
char *name, size_t size);
void __aa_profile_list_release(struct list_head *head);
#define PROF_ADD 1
#define PROF_REPLACE 0
@ -257,12 +216,6 @@ ssize_t aa_remove_profiles(char *name, size_t size);
#define unconfined(X) ((X)->mode == APPARMOR_UNCONFINED)
static inline struct aa_profile *aa_deref_parent(struct aa_profile *p)
{
return rcu_dereference_protected(p->parent,
mutex_is_locked(&p->ns->lock));
}
/**
* aa_get_profile - increment refcount on profile @p
* @p: profile (MAYBE NULL)
@ -326,8 +279,8 @@ static inline struct aa_profile *aa_get_newest_profile(struct aa_profile *p)
if (!p)
return NULL;
if (PROFILE_INVALID(p))
return aa_get_profile_rcu(&p->replacedby->profile);
if (profile_is_stale(p))
return aa_get_profile_rcu(&p->proxy->profile);
return aa_get_profile(p);
}
@ -342,7 +295,7 @@ static inline void aa_put_profile(struct aa_profile *p)
kref_put(&p->count, aa_free_profile_kref);
}
static inline struct aa_replacedby *aa_get_replacedby(struct aa_replacedby *p)
static inline struct aa_proxy *aa_get_proxy(struct aa_proxy *p)
{
if (p)
kref_get(&(p->count));
@ -350,49 +303,10 @@ static inline struct aa_replacedby *aa_get_replacedby(struct aa_replacedby *p)
return p;
}
static inline void aa_put_replacedby(struct aa_replacedby *p)
static inline void aa_put_proxy(struct aa_proxy *p)
{
if (p)
kref_put(&p->count, aa_free_replacedby_kref);
}
/* requires profile list write lock held */
static inline void __aa_update_replacedby(struct aa_profile *orig,
struct aa_profile *new)
{
struct aa_profile *tmp;
tmp = rcu_dereference_protected(orig->replacedby->profile,
mutex_is_locked(&orig->ns->lock));
rcu_assign_pointer(orig->replacedby->profile, aa_get_profile(new));
orig->flags |= PFLAG_INVALID;
aa_put_profile(tmp);
}
/**
* aa_get_namespace - increment references count on @ns
* @ns: namespace to increment reference count of (MAYBE NULL)
*
* Returns: pointer to @ns, if @ns is NULL returns NULL
* Requires: @ns must be held with valid refcount when called
*/
static inline struct aa_namespace *aa_get_namespace(struct aa_namespace *ns)
{
if (ns)
aa_get_profile(ns->unconfined);
return ns;
}
/**
* aa_put_namespace - decrement refcount on @ns
* @ns: namespace to put reference of
*
* Decrement reference count of @ns and if no longer in use free it
*/
static inline void aa_put_namespace(struct aa_namespace *ns)
{
if (ns)
aa_put_profile(ns->unconfined);
kref_put(&p->count, aa_free_proxy_kref);
}
static inline int AUDIT_MODE(struct aa_profile *profile)
@ -403,8 +317,9 @@ static inline int AUDIT_MODE(struct aa_profile *profile)
return profile->audit;
}
bool policy_view_capable(void);
bool policy_admin_capable(void);
bool aa_may_manage_policy(int op);
bool policy_view_capable(struct aa_ns *ns);
bool policy_admin_capable(struct aa_ns *ns);
int aa_may_manage_policy(struct aa_profile *profile, struct aa_ns *ns,
const char *op);
#endif /* __AA_POLICY_H */