linux-kernel - [PATCH AUTOSEL 5.7 167/274] Crypto/chcr: fix for ccm(aes) failed test

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Message-Id: <20200608230607.3361041-167-sashal@kernel.org>
Date:   Mon,  8 Jun 2020 19:04:20 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Devulapally Shiva Krishna <shiva@...lsio.com>,
        Ayush Sawal <ayush.sawal@...lsio.com>,
        "David S . Miller" <davem@...emloft.net>,
        Sasha Levin <sashal@...nel.org>, linux-crypto@...r.kernel.org
Subject: [PATCH AUTOSEL 5.7 167/274] Crypto/chcr: fix for ccm(aes) failed test

From: Devulapally Shiva Krishna <shiva@...lsio.com>

[ Upstream commit 10b0c75d7bc19606fa9a62c8ab9180e95c0e0385 ]

The ccm(aes) test fails when req->assoclen > ~240bytes.

The problem is the value assigned to auth_offset is wrong.
As auth_offset is unsigned char, it can take max value as 255.
So fix it by making it unsigned int.

Signed-off-by: Ayush Sawal <ayush.sawal@...lsio.com>
Signed-off-by: Devulapally Shiva Krishna <shiva@...lsio.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/crypto/chelsio/chcr_algo.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/crypto/chelsio/chcr_algo.c b/drivers/crypto/chelsio/chcr_algo.c
index 446fb896ee6d..6c2cd36048ea 100644
--- a/drivers/crypto/chelsio/chcr_algo.c
+++ b/drivers/crypto/chelsio/chcr_algo.c
@@ -2925,7 +2925,7 @@ static void fill_sec_cpl_for_aead(struct cpl_tx_sec_pdu *sec_cpl,
 	unsigned int mac_mode = CHCR_SCMD_AUTH_MODE_CBCMAC;
 	unsigned int rx_channel_id = reqctx->rxqidx / ctx->rxq_perchan;
 	unsigned int ccm_xtra;
-	unsigned char tag_offset = 0, auth_offset = 0;
+	unsigned int tag_offset = 0, auth_offset = 0;
 	unsigned int assoclen;
 
 	if (get_aead_subtype(tfm) == CRYPTO_ALG_SUB_TYPE_AEAD_RFC4309)
-- 
2.25.1