crypto: caam - avoid kzalloc(0) in caam_read_raw_data

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> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
mariux64 · May 18, 2017 · 7fcaf62 · 7fcaf62
1 parent 15a9b36
commit 7fcaf62
Showing 1 changed file with 2 additions and 0 deletions.
diff --git 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)