[PATCH] ceph: Use struct_size() helper

[Thorsten Blum]

Use struct_size() to calculate the number of bytes to be allocated.

Signed-off-by: Thorsten Blum <thorsten.blum@xxxxxxxxxx>
---
 fs/ceph/addr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
index c4744a02db75..ab494f250d80 100644
--- a/fs/ceph/addr.c
+++ b/fs/ceph/addr.c
@@ -2133,7 +2133,7 @@ static int __ceph_pool_perm_get(struct ceph_inode_info *ci,
 	}
 
 	pool_ns_len = pool_ns ? pool_ns->len : 0;
-	perm = kmalloc(sizeof(*perm) + pool_ns_len + 1, GFP_NOFS);
+	perm = kmalloc(struct_size(perm, pool_ns, pool_ns_len + 1), GFP_NOFS);
 	if (!perm) {
 		err = -ENOMEM;
 		goto out_unlock;
-- 
2.46.0