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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>
This commit is contained in:
Dmitry Kasatkin 2014-10-01 21:43:10 +03:00 committed by Mimi Zohar
parent c2baec7ffa
commit 456f5fd3f6
2 changed files with 4 additions and 3 deletions
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4
security/integrity/ima/ima_api.c
View File

@ -325,11 +325,11 @@ const char *ima_d_path(struct path *path, char **pathbuf)
{ {
char *pathname = NULL; char *pathname = NULL;
*pathbuf = kmalloc(PATH_MAX, GFP_KERNEL); *pathbuf = __getname();
if (*pathbuf) { if (*pathbuf) {
pathname = d_absolute_path(path, *pathbuf, PATH_MAX); pathname = d_absolute_path(path, *pathbuf, PATH_MAX);
if (IS_ERR(pathname)) { if (IS_ERR(pathname)) {
kfree(*pathbuf); __putname(*pathbuf);
*pathbuf = NULL; *pathbuf = NULL;
pathname = NULL; pathname = NULL;
} }

3
security/integrity/ima/ima_main.c
View File

@ -246,7 +246,8 @@ out_digsig:
rc = -EACCES; rc = -EACCES;
kfree(xattr_value); kfree(xattr_value);
out_free: out_free:
kfree(pathbuf); if (pathbuf)
__putname(pathbuf);
out: out:
mutex_unlock(&inode->i_mutex); mutex_unlock(&inode->i_mutex);
if ((rc && must_appraise) && (ima_appraise & IMA_APPRAISE_ENFORCE)) if ((rc && must_appraise) && (ima_appraise & IMA_APPRAISE_ENFORCE))