VisionFive2 Linux kernel

author: Daniele Alessandrelli <daniele.alessandrelli@intel.com> 2021-02-03 11:28:37 +0000 committer: Herbert Xu <herbert@gondor.apana.org.au> 2021-02-10 17:55:57 +1100 commit: a53ab94eb6850c3657392e2d2ce9b38c387a2633 parent: 578f23d359bf7c988b1c9026d4711de7112b0c1c

Commit Summary:

crypto: ecdh_helper - Ensure 'len >= secret.len' in decode_key()

Diffstat:

1 file changed, 3 insertions, 0 deletions

diff --git a/crypto/ecdh_helper.c b/crypto/ecdh_helper.c
index 66fcb2ea8154..fca63b559f65 100644
--- a/crypto/ecdh_helper.c
+++ b/crypto/ecdh_helper.c
@@ -67,6 +67,9 @@ int crypto_ecdh_decode_key(const char *buf, unsigned int len,
 	if (secret.type != CRYPTO_KPP_SECRET_TYPE_ECDH)
 		return -EINVAL;
 
+	if (unlikely(len < secret.len))
+		return -EINVAL;
+
 	ptr = ecdh_unpack_data(&params->curve_id, ptr, sizeof(params->curve_id));
 	ptr = ecdh_unpack_data(&params->key_size, ptr, sizeof(params->key_size));
 	if (secret.len != crypto_ecdh_key_len(params))