[PATCH] module/decompress: Adjust module_extend_max_pages() allocation type

[Kees Cook <kees@kernel.org>]

In preparation for making the kmalloc family of allocators type aware,
we need to make sure that the returned type from the allocation matches
the type of the variable being assigned. (Before, the allocator would
always return "void *", which can be implicitly cast to any pointer type.)

The assigned type is "struct page **" but the returned type will be
"struct page ***". These have the same allocation size (pointer size), but
the types don't match. Adjust the allocation type to match the assignment.

Signed-off-by: Kees Cook <kees@kernel.org>
---
Cc: Luis Chamberlain <mcgrof@kernel.org>
Cc: Petr Pavlu <petr.pavlu@suse.com>
Cc: Sami Tolvanen <samitolvanen@google.com>
Cc: Daniel Gomez <da.gomez@samsung.com>
Cc: <linux-modules@vger.kernel.org>
---
 kernel/module/decompress.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/module/decompress.c b/kernel/module/decompress.c
index 474e68f0f063..bbb2a55568cd 100644
--- a/kernel/module/decompress.c
+++ b/kernel/module/decompress.c
@@ -19,7 +19,7 @@ static int module_extend_max_pages(struct load_info *info, unsigned int extent)
 	struct page **new_pages;
 
 	new_pages = kvmalloc_array(info->max_pages + extent,
-				   sizeof(info->pages), GFP_KERNEL);
+				   sizeof(*new_pages), GFP_KERNEL);
 	if (!new_pages)
 		return -ENOMEM;
 
-- 
2.34.1