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: v5.10.239~338
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=c064ae2881d839709bd72d484d5f2af157f46024;p=thirdparty%2Fkernel%2Fstable.git

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

[ Upstream commit 8a4e047c6cc07676f637608a9dd675349b5de0a7 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/crypto/marvell/cesa/cipher.c b/drivers/crypto/marvell/cesa/cipher.c
index 8dc10f9988948..051a661a63eeb 100644
--- a/drivers/crypto/marvell/cesa/cipher.c
+++ b/drivers/crypto/marvell/cesa/cipher.c
@@ -449,6 +449,9 @@ 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;