TOMOYO: Allow wildcard for execute permission.
Some applications create and execute programs dynamically. We need to accept
wildcard for execute permission because such programs contain random suffix
in their filenames. This patch loosens up regulation of string parameters.
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: James Morris <jmorris@namei.org>
diff --git a/security/tomoyo/common.c b/security/tomoyo/common.c
index 98e3639..3f94011 100644
--- a/security/tomoyo/common.c
+++ b/security/tomoyo/common.c
@@ -407,7 +407,7 @@
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 f4a8aa2..d1b8d79 100644
--- a/security/tomoyo/common.h
+++ b/security/tomoyo/common.h
@@ -672,16 +672,15 @@
/* 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 7b8693e..50f6e79 100644
--- a/security/tomoyo/domain.c
+++ b/security/tomoyo/domain.c
@@ -131,11 +131,11 @@
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 @@
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 @@
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 cef6854..83fa17a 100644
--- a/security/tomoyo/file.c
+++ b/security/tomoyo/file.c
@@ -65,23 +65,10 @@
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 @@
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 @@
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 @@
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 @@
* @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_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 @@
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 @@
} 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 @@
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 @@
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 c49792e..8d6ef8f 100644
--- a/security/tomoyo/number_group.c
+++ b/security/tomoyo/number_group.c
@@ -24,8 +24,7 @@
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 636025e..07e4f78 100644
--- a/security/tomoyo/path_group.c
+++ b/security/tomoyo/path_group.c
@@ -22,8 +22,7 @@
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 @@
*
* @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 7b023f5..592b76a 100644
--- a/security/tomoyo/util.c
+++ b/security/tomoyo/util.c
@@ -89,7 +89,7 @@
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 @@
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 @@
}
/**
- * 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 @@
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 @@
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 @@
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 @@
}
/**
+ * 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++ != ' ')
+ 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;
- if (*domainname++ != '/')
- 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;
}