From: Gilad Ben-Yossef <gilad@xxxxxxxxxxxxx>
[ Upstream commit 8962c6d2c2b8ca51b0f188109015b15fc5f4da44 ]
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@xxxxxxxxxxxxx>
Reported-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx # v4.19+
Tested-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
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 6681d113c0d67..77e31191e408a 100644
--- a/drivers/crypto/ccree/cc_buffer_mgr.c
+++ b/drivers/crypto/ccree/cc_buffer_mgr.c
@@ -1021,8 +1021,12 @@ 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);
--
2.20.1
