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apparmor: update query interface to support label queries 

Signed-off-by: John Johansen <john.johansen@canonical.com>
zero-colors
John Johansen 2017-06-09 13:55:38 -07:00
parent 76a1d263ab
commit 317d9a054e
1 changed files with 39 additions and 7 deletions
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46
security/apparmor/apparmorfs.c
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@ -33,6 +33,7 @@
#include "include/context.h"
#include "include/crypto.h"
#include "include/policy_ns.h"
#include "include/label.h"
#include "include/policy.h"
#include "include/policy_ns.h"
#include "include/resource.h"
@ -629,6 +630,7 @@ static void profile_query_cb(struct aa_profile *profile, struct aa_perms *perms,
tmp = nullperms;
}
aa_apply_modes_to_perms(profile, &tmp);
aa_perms_accum_raw(perms, &tmp);
}
@ -655,7 +657,9 @@ static ssize_t query_data(char *buf, size_t buf_len,
{
char *out;
const char *key;
struct label_it i;
struct aa_label *label, *curr;
struct aa_profile *profile;
struct aa_data *data;
u32 bytes, blocks;
__le32 outle32;
@ -690,13 +694,16 @@ static ssize_t query_data(char *buf, size_t buf_len,
out = buf + sizeof(bytes) + sizeof(blocks);
blocks = 0;
if (labels_profile(label)->data) {
data = rhashtable_lookup_fast(labels_profile(label)->data, &key,
labels_profile(label)->data->p);
label_for_each_confined(i, label, profile) {
if (!profile->data)
continue;
data = rhashtable_lookup_fast(profile->data, &key,
profile->data->p);
if (data) {
if (out + sizeof(outle32) + data->size >
buf + buf_len) {
if (out + sizeof(outle32) + data->size > buf +
buf_len) {
aa_put_label(label);
return -EINVAL; /* not enough space */
}
@ -741,10 +748,12 @@ static ssize_t query_data(char *buf, size_t buf_len,
static ssize_t query_label(char *buf, size_t buf_len,
char *query, size_t query_len, bool view_only)
{
struct aa_profile *profile;
struct aa_label *label, *curr;
char *label_name, *match_str;
size_t label_name_len, match_len;
struct aa_perms perms;
struct label_it i;
if (!query_len)
return -EINVAL;
@ -770,7 +779,16 @@ static ssize_t query_label(char *buf, size_t buf_len,
return PTR_ERR(label);
perms = allperms;
profile_query_cb(labels_profile(label), &perms, match_str, match_len);
if (view_only) {
label_for_each_in_ns(i, labels_ns(label), label, profile) {
profile_query_cb(profile, &perms, match_str, match_len);
}
} else {
label_for_each(i, label, profile) {
profile_query_cb(profile, &perms, match_str, match_len);
}
}
aa_put_label(label);
return scnprintf(buf, buf_len,
"allow 0x%08x\ndeny 0x%08x\naudit 0x%08x\nquiet 0x%08x\n",
@ -877,9 +895,12 @@ static int multi_transaction_release(struct inode *inode, struct file *file)
return 0;
}
#define QUERY_CMD_LABEL "label\0"
#define QUERY_CMD_LABEL_LEN 6
#define QUERY_CMD_PROFILE "profile\0"
#define QUERY_CMD_PROFILE_LEN 8
#define QUERY_CMD_LABELALL "labelall\0"
#define QUERY_CMD_LABELALL_LEN 9
#define QUERY_CMD_DATA "data\0"
#define QUERY_CMD_DATA_LEN 5
@ -922,6 +943,17 @@ static ssize_t aa_write_access(struct file *file, const char __user *ubuf,
len = query_label(t->data, MULTI_TRANSACTION_LIMIT,
t->data + QUERY_CMD_PROFILE_LEN,
count - QUERY_CMD_PROFILE_LEN, true);
} else if (count > QUERY_CMD_LABEL_LEN &&
!memcmp(t->data, QUERY_CMD_LABEL, QUERY_CMD_LABEL_LEN)) {
len = query_label(t->data, MULTI_TRANSACTION_LIMIT,
t->data + QUERY_CMD_LABEL_LEN,
count - QUERY_CMD_LABEL_LEN, true);
} else if (count > QUERY_CMD_LABELALL_LEN &&
!memcmp(t->data, QUERY_CMD_LABELALL,
QUERY_CMD_LABELALL_LEN)) {
len = query_label(t->data, MULTI_TRANSACTION_LIMIT,
t->data + QUERY_CMD_LABELALL_LEN,
count - QUERY_CMD_LABELALL_LEN, false);
} else if (count > QUERY_CMD_DATA_LEN &&
!memcmp(t->data, QUERY_CMD_DATA, QUERY_CMD_DATA_LEN)) {
len = query_data(t->data, MULTI_TRANSACTION_LIMIT,