linux-kernel - [PATCH 5.4 093/261] Crypto/chcr: fix for ccm(aes) failed test

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Message-Id: <20200619141654.336380916@linuxfoundation.org>
Date:   Fri, 19 Jun 2020 16:31:44 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Ayush Sawal <ayush.sawal@...lsio.com>,
        Devulapally Shiva Krishna <shiva@...lsio.com>,
        "David S. Miller" <davem@...emloft.net>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 093/261] 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 01dd418bdadc..fe2eadc0ce83 100644
--- a/drivers/crypto/chelsio/chcr_algo.c
+++ b/drivers/crypto/chelsio/chcr_algo.c
@@ -2818,7 +2818,7 @@ 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 c_id = a_ctx(tfm)->tx_chan_id;
 	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