diff mbox

[2/5] crypto: caampkc - avoid kzalloc(0) in caam_read_raw_data

Message ID 20170425132639.20178-3-horia.geanta@nxp.com (mailing list archive)
State Accepted
Delegated to: Herbert Xu
Headers show

Commit Message

Horia Geanta April 25, 2017, 1:26 p.m. UTC 
From: Tudor Ambarus <tudor-dan.ambarus@nxp.com>

The function returns NULL if buf is composed only of zeros.

Signed-off-by: Tudor Ambarus <tudor-dan.ambarus@nxp.com>
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
---
 drivers/crypto/caam/caampkc.c | 2 ++
 1 file changed, 2 insertions(+)
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Patch

diff --git a/drivers/crypto/caam/caampkc.c b/drivers/crypto/caam/caampkc.c
index 49cbdcba7883..999ba18495b0 100644
--- a/drivers/crypto/caam/caampkc.c
+++ b/drivers/crypto/caam/caampkc.c
@@ -374,6 +374,8 @@  static inline u8 *caam_read_raw_data(const u8 *buf, size_t *nbytes)
 		buf++;
 		(*nbytes)--;
 	}
+	if (!*nbytes)
+		return NULL;
 
 	val = kzalloc(*nbytes, GFP_DMA | GFP_KERNEL);
 	if (!val)