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-rw-r--r--security/keys/trusted.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/security/keys/trusted.c b/security/keys/trusted.c
index 903dace648a1..16dec53184b6 100644
--- a/security/keys/trusted.c
+++ b/security/keys/trusted.c
@@ -1007,13 +1007,16 @@ static void trusted_rcu_free(struct rcu_head *rcu)
*/
static int trusted_update(struct key *key, struct key_preparsed_payload *prep)
{
- struct trusted_key_payload *p = key->payload.data[0];
+ struct trusted_key_payload *p;
struct trusted_key_payload *new_p;
struct trusted_key_options *new_o;
size_t datalen = prep->datalen;
char *datablob;
int ret = 0;
+ if (test_bit(KEY_FLAG_NEGATIVE, &key->flags))
+ return -ENOKEY;
+ p = key->payload.data[0];
if (!p->migratable)
return -EPERM;
if (datalen <= 0 || datalen > 32767 || !prep->data)