From: Gilad Ben-Yossef <gilad@benyossef.com>
Date: Mon, 29 Jul 2019 10:40:18 +0000 (+0300)
Subject: crypto: ccree - use the full crypt length value
X-Git-Tag: v5.4-rc1~132^2~215
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=7a4be6c113c1f721818d1e3722a9015fe393295c;p=linux.git

crypto: ccree - use the full crypt length value

In case of AEAD decryption verifcation error we were using the
wrong value to zero out the plaintext buffer leaving the end of
the buffer with the false plaintext.

Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Fixes: ff27e85a85bb ("crypto: ccree - add AEAD support")
CC: stable@vger.kernel.org # v4.17+
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---

diff --git a/drivers/crypto/ccree/cc_aead.c b/drivers/crypto/ccree/cc_aead.c
index ce302adc76c7..339fabfe3de6 100644
--- a/drivers/crypto/ccree/cc_aead.c
+++ b/drivers/crypto/ccree/cc_aead.c
@@ -236,7 +236,7 @@ static void cc_aead_complete(struct device *dev, void *cc_req, int err)
 			/* In case of payload authentication failure, MUST NOT
 			 * revealed the decrypted message --> zero its memory.
 			 */
-			cc_zero_sgl(areq->dst, areq_ctx->cryptlen);
+			cc_zero_sgl(areq->dst, areq->cryptlen);
 			err = -EBADMSG;
 		}
 	/*ENCRYPT*/