treewide: Replace kmalloc with kmalloc_obj for non-scalar types

This is the result of running the Coccinelle script from
scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to
avoid scalar types (which need careful case-by-case checking), and
instead replace kmalloc-family calls that allocate struct or union
object instances:

Single allocations:	kmalloc(sizeof(TYPE), ...)
are replaced with:	kmalloc_obj(TYPE, ...)

Array allocations:	kmalloc_array(COUNT, sizeof(TYPE), ...)
are replaced with:	kmalloc_objs(TYPE, COUNT, ...)

Flex array allocations:	kmalloc(struct_size(PTR, FAM, COUNT), ...)
are replaced with:	kmalloc_flex(*PTR, FAM, COUNT, ...)

(where TYPE may also be *VAR)

The resulting allocations no longer return "void *", instead returning
"TYPE *".

Signed-off-by: Kees Cook <kees@kernel.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/block/blk-map.c b/block/blk-map.c
index 4533094d9458..53bdd100aa4b 100644
--- a/block/blk-map.c
+++ b/block/blk-map.c
@@ -26,7 +26,7 @@ static struct bio_map_data *bio_alloc_map_data(struct iov_iter *data,
 	if (data->nr_segs > UIO_MAXIOV)
 		return NULL;
 
-	bmd = kmalloc(struct_size(bmd, iov, data->nr_segs), gfp_mask);
+	bmd = kmalloc_flex(*bmd, iov, data->nr_segs, gfp_mask);
 	if (!bmd)
 		return NULL;
 	bmd->iter = *data;