[PATCH][V2] ima: Fix sizeof mismatches

[Colin King]

From: Colin Ian King <colin.king at canonical.com>

An incorrect sizeof is being used, sizeof(*fields) is not correct,
it should be sizeof(**fields). This is not causing a problem since
the size of these is the same. Fix this. 

Also replace kmalloc_array and memcpy with a kmemdup.

Addresses-Coverity: ("Sizeof not portable (SIZEOF_MISMATCH)")
Fixes: 1bd7face7439 ("ima: allocate field pointers array on demand in template_desc_init_fields()")
Signed-off-by: Colin Ian King <colin.king at canonical.com>
---

V2: Replace kmalloc_array and memcpy with kmemdup as suggested by
    Joe Perches.

---
 security/integrity/ima/ima_template.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/security/integrity/ima/ima_template.c b/security/integrity/ima/ima_template.c
index 1e89e2d3851f..83886e767678 100644
--- a/security/integrity/ima/ima_template.c
+++ b/security/integrity/ima/ima_template.c
@@ -216,11 +216,10 @@ int template_desc_init_fields(const char *template_fmt,
 	}
 
 	if (fields && num_fields) {
-		*fields = kmalloc_array(i, sizeof(*fields), GFP_KERNEL);
+		*fields = kmemdup(found_fields, i * sizeof(**fields), GFP_KERNEL);
 		if (*fields == NULL)
 			return -ENOMEM;
 
-		memcpy(*fields, found_fields, i * sizeof(*fields));
 		*num_fields = i;
 	}
 
-- 
2.27.0