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Diffstat (limited to 'security/apparmor/policy_unpack.c')
-rw-r--r--security/apparmor/policy_unpack.c96
1 files changed, 82 insertions, 14 deletions
diff --git a/security/apparmor/policy_unpack.c b/security/apparmor/policy_unpack.c
index 981d570eebba..c600f4dd1783 100644
--- a/security/apparmor/policy_unpack.c
+++ b/security/apparmor/policy_unpack.c
@@ -26,6 +26,7 @@
#include "include/context.h"
#include "include/crypto.h"
#include "include/match.h"
+#include "include/path.h"
#include "include/policy.h"
#include "include/policy_unpack.h"
@@ -107,7 +108,7 @@ static int audit_iface(struct aa_profile *new, const char *ns_name,
const char *name, const char *info, struct aa_ext *e,
int error)
{
- struct aa_profile *profile = __aa_current_profile();
+ struct aa_profile *profile = labels_profile(aa_current_raw_label());
DEFINE_AUDIT_DATA(sa, LSM_AUDIT_DATA_NONE, NULL);
if (e)
aad(&sa)->iface.pos = e->pos - e->start;
@@ -122,16 +123,73 @@ static int audit_iface(struct aa_profile *new, const char *ns_name,
return aa_audit(AUDIT_APPARMOR_STATUS, profile, &sa, audit_cb);
}
+void __aa_loaddata_update(struct aa_loaddata *data, long revision)
+{
+ AA_BUG(!data);
+ AA_BUG(!data->ns);
+ AA_BUG(!data->dents[AAFS_LOADDATA_REVISION]);
+ AA_BUG(!mutex_is_locked(&data->ns->lock));
+ AA_BUG(data->revision > revision);
+
+ data->revision = revision;
+ d_inode(data->dents[AAFS_LOADDATA_DIR])->i_mtime =
+ current_time(d_inode(data->dents[AAFS_LOADDATA_DIR]));
+ d_inode(data->dents[AAFS_LOADDATA_REVISION])->i_mtime =
+ current_time(d_inode(data->dents[AAFS_LOADDATA_REVISION]));
+}
+
+bool aa_rawdata_eq(struct aa_loaddata *l, struct aa_loaddata *r)
+{
+ if (l->size != r->size)
+ return false;
+ if (aa_g_hash_policy && memcmp(l->hash, r->hash, aa_hash_size()) != 0)
+ return false;
+ return memcmp(l->data, r->data, r->size) == 0;
+}
+
+/*
+ * need to take the ns mutex lock which is NOT safe most places that
+ * put_loaddata is called, so we have to delay freeing it
+ */
+static void do_loaddata_free(struct work_struct *work)
+{
+ struct aa_loaddata *d = container_of(work, struct aa_loaddata, work);
+ struct aa_ns *ns = aa_get_ns(d->ns);
+
+ if (ns) {
+ mutex_lock(&ns->lock);
+ __aa_fs_remove_rawdata(d);
+ mutex_unlock(&ns->lock);
+ aa_put_ns(ns);
+ }
+
+ kzfree(d->hash);
+ kfree(d->name);
+ kvfree(d);
+}
+
void aa_loaddata_kref(struct kref *kref)
{
struct aa_loaddata *d = container_of(kref, struct aa_loaddata, count);
if (d) {
- kzfree(d->hash);
- kvfree(d);
+ INIT_WORK(&d->work, do_loaddata_free);
+ schedule_work(&d->work);
}
}
+struct aa_loaddata *aa_loaddata_alloc(size_t size)
+{
+ struct aa_loaddata *d = kvzalloc(sizeof(*d) + size, GFP_KERNEL);
+
+ if (d == NULL)
+ return ERR_PTR(-ENOMEM);
+ kref_init(&d->count);
+ INIT_LIST_HEAD(&d->list);
+
+ return d;
+}
+
/* test if read will be in packed data bounds */
static bool inbounds(struct aa_ext *e, size_t size)
{
@@ -408,7 +466,7 @@ static bool unpack_trans_table(struct aa_ext *e, struct aa_profile *profile)
profile->file.trans.size = size;
for (i = 0; i < size; i++) {
char *str;
- int c, j, size2 = unpack_strdup(e, &str, NULL);
+ int c, j, pos, size2 = unpack_strdup(e, &str, NULL);
/* unpack_strdup verifies that the last character is
* null termination byte.
*/
@@ -420,19 +478,25 @@ static bool unpack_trans_table(struct aa_ext *e, struct aa_profile *profile)
goto fail;
/* count internal # of internal \0 */
- for (c = j = 0; j < size2 - 2; j++) {
- if (!str[j])
+ for (c = j = 0; j < size2 - 1; j++) {
+ if (!str[j]) {
+ pos = j;
c++;
+ }
}
if (*str == ':') {
+ /* first character after : must be valid */
+ if (!str[1])
+ goto fail;
/* beginning with : requires an embedded \0,
* verify that exactly 1 internal \0 exists
* trailing \0 already verified by unpack_strdup
+ *
+ * convert \0 back to : for label_parse
*/
- if (c != 1)
- goto fail;
- /* first character after : must be valid */
- if (!str[1])
+ if (c == 1)
+ str[pos] = ':';
+ else if (c > 1)
goto fail;
} else if (c)
/* fail - all other cases with embedded \0 */
@@ -545,7 +609,7 @@ static struct aa_profile *unpack_profile(struct aa_ext *e, char **ns_name)
name = tmpname;
}
- profile = aa_alloc_profile(name, GFP_KERNEL);
+ profile = aa_alloc_profile(name, NULL, GFP_KERNEL);
if (!profile)
return ERR_PTR(-ENOMEM);
@@ -569,13 +633,16 @@ static struct aa_profile *unpack_profile(struct aa_ext *e, char **ns_name)
profile->xmatch_len = tmp;
}
+ /* disconnected attachment string is optional */
+ (void) unpack_str(e, &profile->disconnected, "disconnected");
+
/* per profile debug flags (complain, audit) */
if (!unpack_nameX(e, AA_STRUCT, "flags"))
goto fail;
if (!unpack_u32(e, &tmp, NULL))
goto fail;
if (tmp & PACKED_FLAG_HAT)
- profile->flags |= PFLAG_HAT;
+ profile->label.flags |= FLAG_HAT;
if (!unpack_u32(e, &tmp, NULL))
goto fail;
if (tmp == PACKED_MODE_COMPLAIN || (e->version & FORCE_COMPLAIN_FLAG))
@@ -594,10 +661,11 @@ static struct aa_profile *unpack_profile(struct aa_ext *e, char **ns_name)
/* path_flags is optional */
if (unpack_u32(e, &profile->path_flags, "path_flags"))
- profile->path_flags |= profile->flags & PFLAG_MEDIATE_DELETED;
+ profile->path_flags |= profile->label.flags &
+ PATH_MEDIATE_DELETED;
else
/* set a default value if path_flags field is not present */
- profile->path_flags = PFLAG_MEDIATE_DELETED;
+ profile->path_flags = PATH_MEDIATE_DELETED;
if (!unpack_u32(e, &(profile->caps.allow.cap[0]), NULL))
goto fail;