[PATCH] crypto: marvell/cesa - Handle zero-length skcipher requests

[Herbert Xu]

On Thu, May 08, 2025 at 03:43:07PM +0200, Corentin Labbe wrote:
>
> 6.14.4 boot log at http://kernel.montjoie.ovh/477911.log

This patch may fix the skcipher ENOMEM errors, since they all
seem to come from random test vectors with length 0.

---8<---
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@xxxxxxxxxxxxxxxxxxx>
---
 drivers/crypto/marvell/cesa/cipher.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/crypto/marvell/cesa/cipher.c b/drivers/crypto/marvell/cesa/cipher.c
index 047f3758c1d1..cbf86968d8a2 100644
--- a/drivers/crypto/marvell/cesa/cipher.c
+++ b/drivers/crypto/marvell/cesa/cipher.c
@@ -456,6 +456,9 @@ 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;
-- 
2.39.5

-- 
Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt