From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Sat, 10 May 2025 10:41:31 +0000 (+0800)
Subject: crypto: marvell/cesa - Handle zero-length skcipher requests
X-Git-Tag: v6.16-rc1~206^2~37
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=8a4e047c6cc07676f637608a9dd675349b5de0a7;p=thirdparty%2Flinux.git

crypto: marvell/cesa - Handle zero-length skcipher requests

Do not access random memory for zero-length skcipher requests.
Just return 0.

Fixes: f63601fd616a ("crypto: marvell/cesa - add a new driver for Marvell's CESA")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---

diff --git a/drivers/crypto/marvell/cesa/cipher.c b/drivers/crypto/marvell/cesa/cipher.c
index cf62db50f9585..48c5c8ea8c43e 100644
--- a/drivers/crypto/marvell/cesa/cipher.c
+++ b/drivers/crypto/marvell/cesa/cipher.c
@@ -459,6 +459,9 @@ static int mv_cesa_skcipher_queue_req(struct skcipher_request *req,
 	struct mv_cesa_skcipher_req *creq = skcipher_request_ctx(req);
 	struct mv_cesa_engine *engine;
 
+	if (!req->cryptlen)
+		return 0;
+
 	ret = mv_cesa_skcipher_req_init(req, tmpl);
 	if (ret)
 		return ret;