[apparmor] [PATCH] apparmor: use kvfree_sensitive to free data->data

[Fedor Pchelkin]

Inside unpack_profile() data->data is allocated using kvmemdup() so it
should be freed with the corresponding kvfree_sensitive().

Also add missing data->data release for rhashtable insertion failure path
in unpack_profile().

Found by Linux Verification Center (linuxtesting.org).

Fixes: e025be0f26d5 ("apparmor: support querying extended trusted helper extra 
data")
Cc: sta...@vger.kernel.org
Signed-off-by: Fedor Pchelkin <pchel...@ispras.ru>
---
 security/apparmor/policy.c        | 2 +-
 security/apparmor/policy_unpack.c | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/security/apparmor/policy.c b/security/apparmor/policy.c
index 957654d253dd..14df15e35695 100644
--- a/security/apparmor/policy.c
+++ b/security/apparmor/policy.c
@@ -225,7 +225,7 @@ static void aa_free_data(void *ptr, void *arg)
 {
        struct aa_data *data = ptr;
 
-       kfree_sensitive(data->data);
+       kvfree_sensitive(data->data, data->size);
        kfree_sensitive(data->key);
        kfree_sensitive(data);
 }
diff --git a/security/apparmor/policy_unpack.c 
b/security/apparmor/policy_unpack.c
index 5e578ef0ddff..75452acd0e35 100644
--- a/security/apparmor/policy_unpack.c
+++ b/security/apparmor/policy_unpack.c
@@ -1071,6 +1071,7 @@ static struct aa_profile *unpack_profile(struct aa_ext 
*e, char **ns_name)
 
                        if (rhashtable_insert_fast(profile->data, &data->head,
                                                   profile->data->p)) {
+                               kvfree_sensitive(data->data, data->size);
                                kfree_sensitive(data->key);
                                kfree_sensitive(data);
                                info = "failed to insert data to table";
-- 
2.43.0