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authorTetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>2010-06-24 12:00:25 +0900
committerJames Morris <jmorris@namei.org>2010-08-02 15:34:44 +1000
commit063821c8160568b3390044390c8328e36c5696ad (patch)
tree68a61753cdc6b0edaf0358eebdea8c20aaa713b1 /security
parent475e6fa3d340e75a454ea09191a29e52e2ee6e71 (diff)
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TOMOYO: Allow reading only execute permission.
Policy editor needs to know allow_execute entries in order to build domain transition tree. Reading all entries is slow. Thus, allow reading only allow_execute entries. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'security')
-rw-r--r--security/tomoyo/common.c8
-rw-r--r--security/tomoyo/common.h2
2 files changed, 10 insertions, 0 deletions
diff --git a/security/tomoyo/common.c b/security/tomoyo/common.c
index 2a5330ec06c..6c68981c0f5 100644
--- a/security/tomoyo/common.c
+++ b/security/tomoyo/common.c
@@ -594,6 +594,10 @@ static bool tomoyo_select_one(struct tomoyo_io_buffer *head, const char *data)
struct tomoyo_domain_info *domain = NULL;
bool global_pid = false;
+ if (!strcmp(data, "allow_execute")) {
+ head->print_execute_only = true;
+ return true;
+ }
if (sscanf(data, "pid=%u", &pid) == 1 ||
(global_pid = true, sscanf(data, "global-pid=%u", &pid) == 1)) {
struct task_struct *p;
@@ -759,6 +763,8 @@ static bool tomoyo_print_path_acl(struct tomoyo_io_buffer *head,
for (bit = head->read_bit; bit < TOMOYO_MAX_PATH_OPERATION; bit++) {
if (!(perm & (1 << bit)))
continue;
+ if (head->print_execute_only && bit != TOMOYO_TYPE_EXECUTE)
+ continue;
/* Print "read/write" instead of "read" and "write". */
if ((bit == TOMOYO_TYPE_READ || bit == TOMOYO_TYPE_WRITE)
&& (perm & (1 << TOMOYO_TYPE_READ_WRITE)))
@@ -926,6 +932,8 @@ static bool tomoyo_print_entry(struct tomoyo_io_buffer *head,
= container_of(ptr, struct tomoyo_path_acl, head);
return tomoyo_print_path_acl(head, acl);
}
+ if (head->print_execute_only)
+ return true;
if (acl_type == TOMOYO_TYPE_PATH2_ACL) {
struct tomoyo_path2_acl *acl
= container_of(ptr, struct tomoyo_path2_acl, head);
diff --git a/security/tomoyo/common.h b/security/tomoyo/common.h
index cdc9ef56fd8..67b9aeae80a 100644
--- a/security/tomoyo/common.h
+++ b/security/tomoyo/common.h
@@ -571,6 +571,8 @@ struct tomoyo_io_buffer {
bool read_single_domain;
/* Extra variable for reading. */
u8 read_bit;
+ /* Read only TOMOYO_TYPE_EXECUTE */
+ bool print_execute_only;
/* Bytes available for reading. */
int read_avail;
/* Size of read buffer. */