6.1-stable review patch. If anyone has any objections, please let me know.
------------------
From: Ovidiu Panait <ovidiu.panait@xxxxxxxxxxxxx>
[ Upstream commit d1d6351e37aac14b32a291731d0855996c459d11 ]
In case of a zero-length input, exit gracefully from sahara_aes_crypt().
Fixes: 5de8875281e1 ("crypto: sahara - Add driver for SAHARA2 accelerator.")
Signed-off-by: Ovidiu Panait <ovidiu.panait@xxxxxxxxxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/crypto/sahara.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/crypto/sahara.c b/drivers/crypto/sahara.c
index 89fd54bc0127..4b32e96e197d 100644
--- a/drivers/crypto/sahara.c
+++ b/drivers/crypto/sahara.c
@@ -677,6 +677,9 @@ static int sahara_aes_crypt(struct skcipher_request *req, unsigned long mode)
struct sahara_dev *dev = dev_ptr;
int err = 0;
+ if (!req->cryptlen)
+ return 0;
+
if (unlikely(ctx->keylen != AES_KEYSIZE_128))
return sahara_aes_fallback(req, mode);
--
2.43.0
