crypto_akcipher_maxsize() returns minimum length for output buffer
or error code if key hasn't been set.
Signed-off-by: Tudor Ambarus <tudor.ambarus@xxxxxxxxxxxxx>
---
crypto/asymmetric_keys/public_key.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/crypto/asymmetric_keys/public_key.c b/crypto/asymmetric_keys/public_key.c
index d3a989e..2b2f8bf 100644
--- a/crypto/asymmetric_keys/public_key.c
+++ b/crypto/asymmetric_keys/public_key.c
@@ -123,6 +123,11 @@ int public_key_verify_signature(const struct public_key *pkey,
ret = -ENOMEM;
outlen = crypto_akcipher_maxsize(tfm);
+ if (outlen < 0) {
+ ret = outlen;
+ goto error_free_req;
+ }
+
output = kmalloc(outlen, GFP_KERNEL);
if (!output)
goto error_free_req;
--
2.7.4
