From: Tero Kristo <t-kristo@ti.com>
Date: Tue, 5 Nov 2019 14:01:10 +0000 (+0200)
Subject: crypto: omap-des - handle NULL cipher request
X-Git-Tag: v5.10.7~3034^2~195
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=aca8bf0027d3ab4492d47e6b05b13911948903db;p=platform%2Fkernel%2Flinux-rpi.git

crypto: omap-des - handle NULL cipher request

If no data is provided for DES request, just return immediately. No
processing is needed in this case.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---

diff --git a/drivers/crypto/omap-des.c b/drivers/crypto/omap-des.c
index 31fc930..8eda433 100644
--- a/drivers/crypto/omap-des.c
+++ b/drivers/crypto/omap-des.c
@@ -637,6 +637,9 @@ static int omap_des_crypt(struct skcipher_request *req, unsigned long mode)
 		 !!(mode & FLAGS_ENCRYPT),
 		 !!(mode & FLAGS_CBC));
 
+	if (!req->cryptlen)
+		return 0;
+
 	if (!IS_ALIGNED(req->cryptlen, DES_BLOCK_SIZE))
 		return -EINVAL;