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[PATCHv2,21/22] crypto: omap-des: handle NULL cipher request

Message ID 20191105140111.20285-22-t-kristo@ti.com (mailing list archive)
State Accepted
Delegated to: Herbert Xu
Headers show
Series crypto: omap-sham: fixes towards 5.5 | expand

Commit Message

Tero Kristo Nov. 5, 2019, 2:01 p.m. UTC 
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>
---
 drivers/crypto/omap-des.c | 3 +++
 1 file changed, 3 insertions(+)
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Patch

diff --git a/drivers/crypto/omap-des.c b/drivers/crypto/omap-des.c
index 31fc9300b990..8eda43319204 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;