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From: Gilad Ben-Yossef <gilad@benyossef.com>
To: Herbert Xu <herbert@gondor.apana.org.au>,
	"David S. Miller" <davem@davemloft.net>
Cc: Ofir Drang <ofir.drang@arm.com>,
	Geert Uytterhoeven <geert+renesas@glider.be>,
	stable@vger.kernel.org, linux-crypto@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH] crypto: ccree - dec auth tag size from cryptlen map
Date: Sun,  2 Feb 2020 18:19:14 +0200
Message-ID: <20200202161914.9551-1-gilad@benyossef.com> (raw)

Remove the auth tag size from cryptlen before mapping the destination
in out-of-place AEAD decryption thus resolving a crash with
extended testmgr tests.

Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Reported-by: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: stable@vger.kernel.org # v4.19+
---
 drivers/crypto/ccree/cc_buffer_mgr.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/crypto/ccree/cc_buffer_mgr.c b/drivers/crypto/ccree/cc_buffer_mgr.c
index 885347b5b372..954f14bddf1d 100644
--- a/drivers/crypto/ccree/cc_buffer_mgr.c
+++ b/drivers/crypto/ccree/cc_buffer_mgr.c
@@ -894,8 +894,12 @@ static int cc_aead_chain_data(struct cc_drvdata *drvdata,
 
 	if (req->src != req->dst) {
 		size_for_map = areq_ctx->assoclen + req->cryptlen;
-		size_for_map += (direct == DRV_CRYPTO_DIRECTION_ENCRYPT) ?
-				authsize : 0;
+
+		if (direct == DRV_CRYPTO_DIRECTION_ENCRYPT)
+			size_for_map += authsize;
+		else
+			size_for_map -= authsize;
+
 		if (is_gcm4543)
 			size_for_map += crypto_aead_ivsize(tfm);
 
-- 
2.25.0


             reply index

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-02 16:19 Gilad Ben-Yossef [this message]
2020-02-06 14:45 ` Geert Uytterhoeven
2020-02-09  9:11   ` Gilad Ben-Yossef
2020-02-13  9:22 ` Herbert Xu

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