From ad94dc3a7eb5fa6ff469dbcf401c44b14ad50595 Mon Sep 17 00:00:00 2001 From: Andrea Righi Date: Wed, 3 Apr 2019 07:26:36 +0200 Subject: xen: use struct_size() helper in kzalloc() struct privcmd_buf_vma_private has a zero-sized array at the end (pages), use the new struct_size() helper to determine the proper allocation size and avoid potential type mistakes. Signed-off-by: Andrea Righi Reviewed-by: Juergen Gross Signed-off-by: Juergen Gross --- drivers/xen/privcmd-buf.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'drivers') diff --git a/drivers/xen/privcmd-buf.c b/drivers/xen/privcmd-buf.c index de01a6d0059d..a1c61e351d3f 100644 --- a/drivers/xen/privcmd-buf.c +++ b/drivers/xen/privcmd-buf.c @@ -140,8 +140,7 @@ static int privcmd_buf_mmap(struct file *file, struct vm_area_struct *vma) if (!(vma->vm_flags & VM_SHARED)) return -EINVAL; - vma_priv = kzalloc(sizeof(*vma_priv) + count * sizeof(void *), - GFP_KERNEL); + vma_priv = kzalloc(struct_size(vma_priv, pages, count), GFP_KERNEL); if (!vma_priv) return -ENOMEM; -- cgit v1.2.3-59-g8ed1b