diff mbox series

[06/22] crypto: s390/aes - add check for xts input length equal to zero

Message ID 20200807162010.18979-7-andrei.botila@oss.nxp.com (mailing list archive)
State Not Applicable
Headers show
Series crypto: add check for xts input length equal to zero | expand

Checks

Context Check Description
snowpatch_ozlabs/apply_patch success Successfully applied on branch powerpc/merge (3cd2184115b85cc8242fec3d42529cd112962984)
snowpatch_ozlabs/checkpatch success total: 0 errors, 0 warnings, 0 checks, 9 lines checked
snowpatch_ozlabs/needsstable success Patch has no Fixes tags

Commit Message

Andrei Botila Aug. 7, 2020, 4:19 p.m. UTC 
From: Andrei Botila <andrei.botila@nxp.com>

Standardize the way input lengths equal to 0 are handled in all skcipher
algorithms. All the algorithms return 0 for input lengths equal to zero.

Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Andrei Botila <andrei.botila@nxp.com>
---
 arch/s390/crypto/aes_s390.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

diff --git a/arch/s390/crypto/aes_s390.c b/arch/s390/crypto/aes_s390.c
index 73044634d342..bc8855f4b7d1 100644
--- a/arch/s390/crypto/aes_s390.c
+++ b/arch/s390/crypto/aes_s390.c
@@ -437,6 +437,9 @@  static int xts_aes_crypt(struct skcipher_request *req, unsigned long modifier)
 		u8 init[16];
 	} xts_param;
 
+	if (!req->cryptlen)
+		return 0;
+
 	if (req->cryptlen < AES_BLOCK_SIZE)
 		return -EINVAL;