diff mbox series

[18/22] crypto: hisilicon/sec - add check for xts input length equal to zero

Message ID 20200807162010.18979-19-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, 10 lines checked
snowpatch_ozlabs/needsstable success Patch has no Fixes tags

Commit Message

Andrei Botila Aug. 7, 2020, 4:20 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.

Signed-off-by: Andrei Botila <andrei.botila@nxp.com>
---
 drivers/crypto/hisilicon/sec/sec_algs.c | 4 ++++
 1 file changed, 4 insertions(+)
diff mbox series

Patch

diff --git a/drivers/crypto/hisilicon/sec/sec_algs.c b/drivers/crypto/hisilicon/sec/sec_algs.c
index 8ca945ac297e..419ec4f23164 100644
--- a/drivers/crypto/hisilicon/sec/sec_algs.c
+++ b/drivers/crypto/hisilicon/sec/sec_algs.c
@@ -723,6 +723,10 @@  static int sec_alg_skcipher_crypto(struct skcipher_request *skreq,
 	bool split = skreq->src != skreq->dst;
 	gfp_t gfp = skreq->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL : GFP_ATOMIC;
 
+	if (!skreq->cryptlen && (ctx->cipher_alg == SEC_C_AES_XTS_128 ||
+				 ctx->cipher_alg == SEC_C_AES_XTS_256))
+		return 0;
+
 	mutex_init(&sec_req->lock);
 	sec_req->req_base = &skreq->base;
 	sec_req->err = 0;