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Diffstat (limited to 'security')
-rw-r--r--security/tomoyo/common.c2
-rw-r--r--security/tomoyo/common.h7
-rw-r--r--security/tomoyo/domain.c21
-rw-r--r--security/tomoyo/file.c37
-rw-r--r--security/tomoyo/number_group.c3
-rw-r--r--security/tomoyo/path_group.c17
-rw-r--r--security/tomoyo/util.c154
7 files changed, 90 insertions, 151 deletions
diff --git a/security/tomoyo/common.c b/security/tomoyo/common.c
index 98e3639db990..3f94011c6411 100644
--- a/security/tomoyo/common.c
+++ b/security/tomoyo/common.c
@@ -407,7 +407,7 @@ static int tomoyo_update_manager_entry(const char *manager,
return -EINVAL;
e.is_domain = true;
} else {
- if (!tomoyo_is_correct_path(manager, 1, -1, -1))
+ if (!tomoyo_is_correct_path(manager))
return -EINVAL;
}
e.manager = tomoyo_get_name(manager);
diff --git a/security/tomoyo/common.h b/security/tomoyo/common.h
index f4a8aa244af5..d1b8d791bfff 100644
--- a/security/tomoyo/common.h
+++ b/security/tomoyo/common.h
@@ -672,16 +672,15 @@ bool tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt, ...)
/* Check whether the domainname is correct. */
bool tomoyo_is_correct_domain(const unsigned char *domainname);
/* Check whether the token is correct. */
-bool tomoyo_is_correct_path(const char *filename, const s8 start_type,
- const s8 pattern_type, const s8 end_type);
+bool tomoyo_is_correct_path(const char *filename);
+bool tomoyo_is_correct_word(const char *string);
/* Check whether the token can be a domainname. */
bool tomoyo_is_domain_def(const unsigned char *buffer);
bool tomoyo_parse_name_union(const char *filename,
struct tomoyo_name_union *ptr);
/* Check whether the given filename matches the given path_group. */
bool tomoyo_path_matches_group(const struct tomoyo_path_info *pathname,
- const struct tomoyo_path_group *group,
- const bool may_use_pattern);
+ const struct tomoyo_path_group *group);
/* Check whether the given value matches the given number_group. */
bool tomoyo_number_matches_group(const unsigned long min,
const unsigned long max,
diff --git a/security/tomoyo/domain.c b/security/tomoyo/domain.c
index 7b8693e29a13..50f6e7972174 100644
--- a/security/tomoyo/domain.c
+++ b/security/tomoyo/domain.c
@@ -131,11 +131,11 @@ static int tomoyo_update_domain_initializer_entry(const char *domainname,
struct tomoyo_domain_initializer_entry e = { .is_not = is_not };
int error = is_delete ? -ENOENT : -ENOMEM;
- if (!tomoyo_is_correct_path(program, 1, -1, -1))
- return -EINVAL; /* No patterns allowed. */
+ if (!tomoyo_is_correct_path(program))
+ return -EINVAL;
if (domainname) {
if (!tomoyo_is_domain_def(domainname) &&
- tomoyo_is_correct_path(domainname, 1, -1, -1))
+ tomoyo_is_correct_path(domainname))
e.is_last_name = true;
else if (!tomoyo_is_correct_domain(domainname))
return -EINVAL;
@@ -342,12 +342,12 @@ static int tomoyo_update_domain_keeper_entry(const char *domainname,
int error = is_delete ? -ENOENT : -ENOMEM;
if (!tomoyo_is_domain_def(domainname) &&
- tomoyo_is_correct_path(domainname, 1, -1, -1))
+ tomoyo_is_correct_path(domainname))
e.is_last_name = true;
else if (!tomoyo_is_correct_domain(domainname))
return -EINVAL;
if (program) {
- if (!tomoyo_is_correct_path(program, 1, -1, -1))
+ if (!tomoyo_is_correct_path(program))
return -EINVAL;
e.program = tomoyo_get_name(program);
if (!e.program)
@@ -533,13 +533,14 @@ static int tomoyo_update_alias_entry(const char *original_name,
struct tomoyo_alias_entry e = { };
int error = is_delete ? -ENOENT : -ENOMEM;
- if (!tomoyo_is_correct_path(original_name, 1, -1, -1) ||
- !tomoyo_is_correct_path(aliased_name, 1, -1, -1))
- return -EINVAL; /* No patterns allowed. */
+ if (!tomoyo_is_correct_path(original_name) ||
+ !tomoyo_is_correct_path(aliased_name))
+ return -EINVAL;
e.original_name = tomoyo_get_name(original_name);
e.aliased_name = tomoyo_get_name(aliased_name);
- if (!e.original_name || !e.aliased_name)
- goto out;
+ if (!e.original_name || !e.aliased_name ||
+ e.original_name->is_patterned || e.aliased_name->is_patterned)
+ goto out; /* No patterns allowed. */
if (mutex_lock_interruptible(&tomoyo_policy_lock))
goto out;
list_for_each_entry_rcu(ptr, &tomoyo_alias_list, list) {
diff --git a/security/tomoyo/file.c b/security/tomoyo/file.c
index cef685415df1..83fa17a1113a 100644
--- a/security/tomoyo/file.c
+++ b/security/tomoyo/file.c
@@ -65,23 +65,10 @@ bool tomoyo_compare_name_union(const struct tomoyo_path_info *name,
const struct tomoyo_name_union *ptr)
{
if (ptr->is_group)
- return tomoyo_path_matches_group(name, ptr->group, 1);
+ return tomoyo_path_matches_group(name, ptr->group);
return tomoyo_path_matches_pattern(name, ptr->filename);
}
-static bool tomoyo_compare_name_union_pattern(const struct tomoyo_path_info
- *name,
- const struct tomoyo_name_union
- *ptr, const bool may_use_pattern)
-{
- if (ptr->is_group)
- return tomoyo_path_matches_group(name, ptr->group,
- may_use_pattern);
- if (may_use_pattern || !ptr->filename->is_patterned)
- return tomoyo_path_matches_pattern(name, ptr->filename);
- return false;
-}
-
void tomoyo_put_number_union(struct tomoyo_number_union *ptr)
{
if (ptr && ptr->is_group)
@@ -247,7 +234,7 @@ static int tomoyo_update_globally_readable_entry(const char *filename,
struct tomoyo_globally_readable_file_entry e = { };
int error = is_delete ? -ENOENT : -ENOMEM;
- if (!tomoyo_is_correct_path(filename, 1, 0, -1))
+ if (!tomoyo_is_correct_word(filename))
return -EINVAL;
e.filename = tomoyo_get_name(filename);
if (!e.filename)
@@ -391,13 +378,14 @@ static int tomoyo_update_file_pattern_entry(const char *pattern,
const bool is_delete)
{
struct tomoyo_pattern_entry *ptr;
- struct tomoyo_pattern_entry e = { .pattern = tomoyo_get_name(pattern) };
+ struct tomoyo_pattern_entry e = { };
int error = is_delete ? -ENOENT : -ENOMEM;
+ if (!tomoyo_is_correct_word(pattern))
+ return -EINVAL;
+ e.pattern = tomoyo_get_name(pattern);
if (!e.pattern)
return error;
- if (!e.pattern->is_patterned)
- goto out;
if (mutex_lock_interruptible(&tomoyo_policy_lock))
goto out;
list_for_each_entry_rcu(ptr, &tomoyo_pattern_list, list) {
@@ -543,7 +531,7 @@ static int tomoyo_update_no_rewrite_entry(const char *pattern,
struct tomoyo_no_rewrite_entry e = { };
int error = is_delete ? -ENOENT : -ENOMEM;
- if (!tomoyo_is_correct_path(pattern, 0, 0, 0))
+ if (!tomoyo_is_correct_word(pattern))
return -EINVAL;
e.pattern = tomoyo_get_name(pattern);
if (!e.pattern)
@@ -690,7 +678,6 @@ static int tomoyo_update_file_acl(u8 perm, const char *filename,
* @r: Pointer to "struct tomoyo_request_info".
* @filename: Filename to check.
* @perm: Permission.
- * @may_use_pattern: True if patterned ACL is permitted.
*
* Returns 0 on success, -EPERM otherwise.
*
@@ -698,7 +685,7 @@ static int tomoyo_update_file_acl(u8 perm, const char *filename,
*/
static int tomoyo_path_acl(const struct tomoyo_request_info *r,
const struct tomoyo_path_info *filename,
- const u32 perm, const bool may_use_pattern)
+ const u32 perm)
{
struct tomoyo_domain_info *domain = r->domain;
struct tomoyo_acl_info *ptr;
@@ -710,8 +697,7 @@ static int tomoyo_path_acl(const struct tomoyo_request_info *r,
continue;
acl = container_of(ptr, struct tomoyo_path_acl, head);
if (!(acl->perm & perm) ||
- !tomoyo_compare_name_union_pattern(filename, &acl->name,
- may_use_pattern))
+ !tomoyo_compare_name_union(filename, &acl->name))
continue;
error = 0;
break;
@@ -756,7 +742,7 @@ static int tomoyo_file_perm(struct tomoyo_request_info *r,
} else
BUG();
do {
- error = tomoyo_path_acl(r, filename, perm, mode != 1);
+ error = tomoyo_path_acl(r, filename, perm);
if (error && mode == 4 && !r->domain->ignore_global_allow_read
&& tomoyo_is_globally_readable_file(filename))
error = 0;
@@ -764,7 +750,6 @@ static int tomoyo_file_perm(struct tomoyo_request_info *r,
break;
tomoyo_warn_log(r, "%s %s", msg, filename->name);
error = tomoyo_supervisor(r, "allow_%s %s\n", msg,
- mode == 1 ? filename->name :
tomoyo_file_pattern(filename));
/*
* Do not retry for execute request, for alias may have
@@ -1073,7 +1058,7 @@ static int tomoyo_path_permission(struct tomoyo_request_info *r, u8 operation,
next:
do {
- error = tomoyo_path_acl(r, filename, 1 << operation, 1);
+ error = tomoyo_path_acl(r, filename, 1 << operation);
if (!error)
break;
msg = tomoyo_path2keyword(operation);
diff --git a/security/tomoyo/number_group.c b/security/tomoyo/number_group.c
index c49792e09e81..8d6ef8f006ff 100644
--- a/security/tomoyo/number_group.c
+++ b/security/tomoyo/number_group.c
@@ -24,8 +24,7 @@ struct tomoyo_number_group *tomoyo_get_number_group(const char *group_name)
struct tomoyo_number_group *group = NULL;
const struct tomoyo_path_info *saved_group_name;
int error = -ENOMEM;
- if (!tomoyo_is_correct_path(group_name, 0, 0, 0) ||
- !group_name[0])
+ if (!tomoyo_is_correct_word(group_name))
return NULL;
saved_group_name = tomoyo_get_name(group_name);
if (!saved_group_name)
diff --git a/security/tomoyo/path_group.c b/security/tomoyo/path_group.c
index 636025e26b06..07e4f782367b 100644
--- a/security/tomoyo/path_group.c
+++ b/security/tomoyo/path_group.c
@@ -22,8 +22,7 @@ struct tomoyo_path_group *tomoyo_get_path_group(const char *group_name)
struct tomoyo_path_group *group = NULL;
const struct tomoyo_path_info *saved_group_name;
int error = -ENOMEM;
- if (!tomoyo_is_correct_path(group_name, 0, 0, 0) ||
- !group_name[0])
+ if (!tomoyo_is_correct_word(group_name))
return NULL;
saved_group_name = tomoyo_get_name(group_name);
if (!saved_group_name)
@@ -141,29 +140,21 @@ bool tomoyo_read_path_group_policy(struct tomoyo_io_buffer *head)
*
* @pathname: The name of pathname.
* @group: Pointer to "struct tomoyo_path_group".
- * @may_use_pattern: True if wild card is permitted.
*
* Returns true if @pathname matches pathnames in @group, false otherwise.
*
* Caller holds tomoyo_read_lock().
*/
bool tomoyo_path_matches_group(const struct tomoyo_path_info *pathname,
- const struct tomoyo_path_group *group,
- const bool may_use_pattern)
+ const struct tomoyo_path_group *group)
{
struct tomoyo_path_group_member *member;
bool matched = false;
list_for_each_entry_rcu(member, &group->member_list, list) {
if (member->is_deleted)
continue;
- if (!member->member_name->is_patterned) {
- if (tomoyo_pathcmp(pathname, member->member_name))
- continue;
- } else if (may_use_pattern) {
- if (!tomoyo_path_matches_pattern(pathname,
- member->member_name))
- continue;
- } else
+ if (!tomoyo_path_matches_pattern(pathname,
+ member->member_name))
continue;
matched = true;
break;
diff --git a/security/tomoyo/util.c b/security/tomoyo/util.c
index 7b023f5e1314..592b76a2bce8 100644
--- a/security/tomoyo/util.c
+++ b/security/tomoyo/util.c
@@ -89,7 +89,7 @@ void tomoyo_print_ulong(char *buffer, const int buffer_len,
bool tomoyo_parse_name_union(const char *filename,
struct tomoyo_name_union *ptr)
{
- if (!tomoyo_is_correct_path(filename, 0, 0, 0))
+ if (!tomoyo_is_correct_word(filename))
return false;
if (filename[0] == '@') {
ptr->group = tomoyo_get_path_group(filename + 1);
@@ -115,7 +115,7 @@ bool tomoyo_parse_number_union(char *data, struct tomoyo_number_union *num)
unsigned long v;
memset(num, 0, sizeof(*num));
if (data[0] == '@') {
- if (!tomoyo_is_correct_path(data, 0, 0, 0))
+ if (!tomoyo_is_correct_word(data))
return false;
num->group = tomoyo_get_number_group(data + 1);
num->is_group = true;
@@ -265,54 +265,29 @@ bool tomoyo_tokenize(char *buffer, char *w[], size_t size)
}
/**
- * tomoyo_is_correct_path - Validate a pathname.
+ * tomoyo_is_correct_word2 - Validate a string.
*
- * @filename: The pathname to check.
- * @start_type: Should the pathname start with '/'?
- * 1 = must / -1 = must not / 0 = don't care
- * @pattern_type: Can the pathname contain a wildcard?
- * 1 = must / -1 = must not / 0 = don't care
- * @end_type: Should the pathname end with '/'?
- * 1 = must / -1 = must not / 0 = don't care
+ * @string: The string to check. May be non-'\0'-terminated.
+ * @len: Length of @string.
*
- * Check whether the given filename follows the naming rules.
- * Returns true if @filename follows the naming rules, false otherwise.
+ * Check whether the given string follows the naming rules.
+ * Returns true if @string follows the naming rules, false otherwise.
*/
-bool tomoyo_is_correct_path(const char *filename, const s8 start_type,
- const s8 pattern_type, const s8 end_type)
+static bool tomoyo_is_correct_word2(const char *string, size_t len)
{
- const char *const start = filename;
+ const char *const start = string;
bool in_repetition = false;
- bool contains_pattern = false;
unsigned char c;
unsigned char d;
unsigned char e;
-
- if (!filename)
+ if (!len)
goto out;
- c = *filename;
- if (start_type == 1) { /* Must start with '/' */
- if (c != '/')
- goto out;
- } else if (start_type == -1) { /* Must not start with '/' */
- if (c == '/')
- goto out;
- }
- if (c)
- c = *(filename + strlen(filename) - 1);
- if (end_type == 1) { /* Must end with '/' */
- if (c != '/')
- goto out;
- } else if (end_type == -1) { /* Must not end with '/' */
- if (c == '/')
- goto out;
- }
- while (1) {
- c = *filename++;
- if (!c)
- break;
+ while (len--) {
+ c = *string++;
if (c == '\\') {
- c = *filename++;
+ if (!len--)
+ goto out;
+ c = *string++;
switch (c) {
case '\\': /* "\\" */
continue;
@@ -326,21 +301,14 @@ bool tomoyo_is_correct_path(const char *filename, const s8 start_type,
case 'a': /* "\a" */
case 'A': /* "\A" */
case '-': /* "\-" */
- if (pattern_type == -1)
- break; /* Must not contain pattern */
- contains_pattern = true;
continue;
case '{': /* "/\{" */
- if (filename - 3 < start ||
- *(filename - 3) != '/')
+ if (string - 3 < start || *(string - 3) != '/')
break;
- if (pattern_type == -1)
- break; /* Must not contain pattern */
- contains_pattern = true;
in_repetition = true;
continue;
case '}': /* "\}/" */
- if (*filename != '/')
+ if (*string != '/')
break;
if (!in_repetition)
break;
@@ -350,11 +318,11 @@ bool tomoyo_is_correct_path(const char *filename, const s8 start_type,
case '1':
case '2':
case '3':
- d = *filename++;
- if (d < '0' || d > '7')
+ if (!len-- || !len--)
break;
- e = *filename++;
- if (e < '0' || e > '7')
+ d = *string++;
+ e = *string++;
+ if (d < '0' || d > '7' || e < '0' || e > '7')
break;
c = tomoyo_make_byte(c, d, e);
if (tomoyo_is_invalid(c))
@@ -367,10 +335,6 @@ bool tomoyo_is_correct_path(const char *filename, const s8 start_type,
goto out;
}
}
- if (pattern_type == 1) { /* Must contain pattern */
- if (!contains_pattern)
- goto out;
- }
if (in_repetition)
goto out;
return true;
@@ -379,58 +343,58 @@ bool tomoyo_is_correct_path(const char *filename, const s8 start_type,
}
/**
+ * tomoyo_is_correct_word - Validate a string.
+ *
+ * @string: The string to check.
+ *
+ * Check whether the given string follows the naming rules.
+ * Returns true if @string follows the naming rules, false otherwise.
+ */
+bool tomoyo_is_correct_word(const char *string)
+{
+ return tomoyo_is_correct_word2(string, strlen(string));
+}
+
+/**
+ * tomoyo_is_correct_path - Validate a pathname.
+ *
+ * @filename: The pathname to check.
+ *
+ * Check whether the given pathname follows the naming rules.
+ * Returns true if @filename follows the naming rules, false otherwise.
+ */
+bool tomoyo_is_correct_path(const char *filename)
+{
+ return *filename == '/' && tomoyo_is_correct_word(filename);
+}
+
+/**
* tomoyo_is_correct_domain - Check whether the given domainname follows the naming rules.
*
- * @domainname: The domainname to check.
+ * @domainname: The domainname to check.
*
* Returns true if @domainname follows the naming rules, false otherwise.
*/
bool tomoyo_is_correct_domain(const unsigned char *domainname)
{
- unsigned char c;
- unsigned char d;
- unsigned char e;
-
if (!domainname || strncmp(domainname, TOMOYO_ROOT_NAME,
TOMOYO_ROOT_NAME_LEN))
goto out;
domainname += TOMOYO_ROOT_NAME_LEN;
if (!*domainname)
return true;
- do {
- if (*domainname++ != ' ')
- goto out;
- if (*domainname++ != '/')
+ if (*domainname++ != ' ')
+ goto out;
+ while (1) {
+ const unsigned char *cp = strchr(domainname, ' ');
+ if (!cp)
+ break;
+ if (*domainname != '/' ||
+ !tomoyo_is_correct_word2(domainname, cp - domainname - 1))
goto out;
- while ((c = *domainname) != '\0' && c != ' ') {
- domainname++;
- if (c == '\\') {
- c = *domainname++;
- switch ((c)) {
- case '\\': /* "\\" */
- continue;
- case '0': /* "\ooo" */
- case '1':
- case '2':
- case '3':
- d = *domainname++;
- if (d < '0' || d > '7')
- break;
- e = *domainname++;
- if (e < '0' || e > '7')
- break;
- c = tomoyo_make_byte(c, d, e);
- if (tomoyo_is_invalid(c))
- /* pattern is not \000 */
- continue;
- }
- goto out;
- } else if (tomoyo_is_invalid(c)) {
- goto out;
- }
- }
- } while (*domainname);
- return true;
+ domainname = cp + 1;
+ }
+ return tomoyo_is_correct_path(domainname);
out:
return false;
}
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-21 18:08:42 +0300