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Message-Id: <6d8e61299e051d51dacdb6bfd6c5e582b230027c.1483599449.git.harsh@chelsio.com>
Date: Fri, 6 Jan 2017 14:01:34 +0530
From: Harsh Jain <harsh@...lsio.com>
To: hariprasad@...lsio.com, netdev@...r.kernel.org,
herbert@...dor.apana.org.au, linux-crypto@...r.kernel.org
Cc: Harsh Jain <harsh@...lsio.com>
Subject: [PATCH v1 3/8] crypto:chcr- Fix key length for RFC4106
Check keylen before copying salt to avoid wrap around of Integer.
Signed-off-by: Harsh Jain <harsh@...lsio.com>
---
drivers/crypto/chelsio/chcr_algo.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/crypto/chelsio/chcr_algo.c b/drivers/crypto/chelsio/chcr_algo.c
index deec7c0..6c2dea3 100644
--- a/drivers/crypto/chelsio/chcr_algo.c
+++ b/drivers/crypto/chelsio/chcr_algo.c
@@ -2194,8 +2194,8 @@ static int chcr_gcm_setkey(struct crypto_aead *aead, const u8 *key,
unsigned int ck_size;
int ret = 0, key_ctx_size = 0;
- if (get_aead_subtype(aead) ==
- CRYPTO_ALG_SUB_TYPE_AEAD_RFC4106) {
+ if (get_aead_subtype(aead) == CRYPTO_ALG_SUB_TYPE_AEAD_RFC4106 &&
+ keylen > 3) {
keylen -= 4; /* nonce/salt is present in the last 4 bytes */
memcpy(aeadctx->salt, key + keylen, 4);
}
--
1.8.2.3
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