Check for a NULL pointer returned by asymmetric_key_public_key and return -ENOKEY in this case.
Signed-off-by: Stefan Berger <[email protected]> --- security/integrity/digsig_asymmetric.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/security/integrity/digsig_asymmetric.c b/security/integrity/digsig_asymmetric.c index 6e68ec3becbd..a791ad43b3fb 100644 --- a/security/integrity/digsig_asymmetric.c +++ b/security/integrity/digsig_asymmetric.c @@ -108,6 +108,10 @@ int asymmetric_verify(struct key *keyring, const char *sig, pks.hash_algo = hash_algo_name[hdr->hash_algo]; pk = asymmetric_key_public_key(key); + if (!pk) { + ret = -ENOKEY; + goto out; + } pks.pkey_algo = pk->pkey_algo; if (!strcmp(pk->pkey_algo, "rsa")) { pks.encoding = "pkcs1"; -- 2.53.0
