Smack: setprocattr memory leak fix
The data structure allocations being done in prepare_creds
are duplicated in smack_setprocattr. This results in the
structure allocated in prepare_creds being orphaned and
never freed. The duplicate code is removed from
smack_setprocattr.
Targeted for git://git.gitorious.org/smack-next/kernel.git
Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index ce9273a1..2874c73 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -2684,9 +2684,7 @@
static int smack_setprocattr(struct task_struct *p, char *name,
void *value, size_t size)
{
- int rc;
struct task_smack *tsp;
- struct task_smack *oldtsp;
struct cred *new;
char *newsmack;
@@ -2716,21 +2714,13 @@
if (newsmack == smack_known_web.smk_known)
return -EPERM;
- oldtsp = p->cred->security;
new = prepare_creds();
if (new == NULL)
return -ENOMEM;
- tsp = new_task_smack(newsmack, oldtsp->smk_forked, GFP_KERNEL);
- if (tsp == NULL) {
- kfree(new);
- return -ENOMEM;
- }
- rc = smk_copy_rules(&tsp->smk_rules, &oldtsp->smk_rules, GFP_KERNEL);
- if (rc != 0)
- return rc;
+ tsp = new->security;
+ tsp->smk_task = newsmack;
- new->security = tsp;
commit_creds(new);
return size;
}