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authorAndrea Righi <andrea.righi@canonical.com>2019-04-03 07:26:36 +0200
committerJuergen Gross <jgross@suse.com>2019-04-05 08:42:41 +0200
commitad94dc3a7eb5fa6ff469dbcf401c44b14ad50595 (patch)
tree04c7feffd21b0a2ecfdcb23b0293a8d44019c8ea /drivers/xen/privcmd-buf.c
parentxen/balloon: Fix mapping PG_offline pages to user space (diff)
downloadlinux-ad94dc3a7eb5fa6ff469dbcf401c44b14ad50595.tar.xz
linux-ad94dc3a7eb5fa6ff469dbcf401c44b14ad50595.zip
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 <andrea.righi@canonical.com> Reviewed-by: Juergen Gross <jgross@suse.com> Signed-off-by: Juergen Gross <jgross@suse.com>
Diffstat (limited to 'drivers/xen/privcmd-buf.c')
-rw-r--r--drivers/xen/privcmd-buf.c3
1 files changed, 1 insertions, 2 deletions
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;