ima: use path names cache

__getname() uses slab allocation which is faster than kmalloc.
Make use of it.

Signed-off-by: Dmitry Kasatkin <d.kasatkin@samsung.com>
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>

2 files changed, 4 insertions, 3 deletions

diff --git a/security/integrity/ima/ima_api.c b/security/integrity/ima/ima_api.c
index 86885979918c..a99eb6d4bc09 100644
--- a/security/integrity/ima/ima_api.c
+++ b/security/integrity/ima/ima_api.c
@@ -325,11 +325,11 @@ const char *ima_d_path(struct path *path, char **pathbuf)
 {
         char *pathname = NULL;
 
-        *pathbuf = kmalloc(PATH_MAX, GFP_KERNEL);
+        *pathbuf = __getname();
         if (*pathbuf) {
                 pathname = d_absolute_path(path, *pathbuf, PATH_MAX);
                 if (IS_ERR(pathname)) {
-                        kfree(*pathbuf);
+                        __putname(*pathbuf);
                         *pathbuf = NULL;
                         pathname = NULL;
                 }
diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c
index 72faf0b5b05c..eeee00dce729 100644
--- a/security/integrity/ima/ima_main.c
+++ b/security/integrity/ima/ima_main.c
@@ -246,7 +246,8 @@ out_digsig:
                 rc = -EACCES;
         kfree(xattr_value);
 out_free:
-        kfree(pathbuf);
+        if (pathbuf)
+                __putname(pathbuf);
 out:
         mutex_unlock(&inode->i_mutex);
         if ((rc && must_appraise) && (ima_appraise & IMA_APPRAISE_ENFORCE))