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selftests: i915: Use struct_size() helper in kmalloc()

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Make use of the struct_size() helper instead of an open-coded version,
in order to avoid any potential type mistakes or integer overflows that,
in the worst scenario, could lead to heap overflows.

Signed-off-by: luoqing <luoqing@kylinos.cn>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Signed-off-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250208013539.3586855-1-l1138897701@163.com
This commit is contained in:
luoqing 2025-02-08 09:35:39 +08:00 committed by Andi Shyti
parent 8d8334632e
commit fc2ef5b6e1
1 changed files with 1 additions and 2 deletions
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3
drivers/gpu/drm/i915/gem/selftests/mock_dmabuf.c
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@ -103,8 +103,7 @@ static struct dma_buf *mock_dmabuf(int npages)
struct dma_buf *dmabuf;
int i;
mock = kmalloc(sizeof(*mock) + npages * sizeof(struct page *),
GFP_KERNEL);
mock = kmalloc(struct_size(mock, pages, npages), GFP_KERNEL);
if (!mock)
return ERR_PTR(-ENOMEM);