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crypto: ccree - dec auth tag size from cryptlen map

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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+
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Gilad Ben-Yossef 2020-02-02 18:19:14 +02:00 • committed by Herbert Xu
parent 11144416a7
commit 8962c6d2c2
1 changed files with 6 additions and 2 deletions
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8
drivers/crypto/ccree/cc_buffer_mgr.c
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@ -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);