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, 3 insertions, 3 deletions

diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index 1e7a34a31851..e1395834886e 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -6001,7 +6001,7 @@ ring_buffer_read_start(struct trace_buffer *buffer, int cpu, gfp_t flags)
 	if (!cpumask_test_cpu(cpu, buffer->cpumask))
 		return NULL;
 
-	iter = kzalloc(sizeof(*iter), flags);
+	iter = kzalloc_obj(*iter, flags);
 	if (!iter)
 		return NULL;
 
@@ -6509,7 +6509,7 @@ ring_buffer_alloc_read_page(struct trace_buffer *buffer, int cpu)
 	if (!cpumask_test_cpu(cpu, buffer->cpumask))
 		return ERR_PTR(-ENODEV);
 
-	bpage = kzalloc(sizeof(*bpage), GFP_KERNEL);
+	bpage = kzalloc_obj(*bpage, GFP_KERNEL);
 	if (!bpage)
 		return ERR_PTR(-ENOMEM);
 
@@ -7190,7 +7190,7 @@ static int __rb_map_vma(struct ring_buffer_per_cpu *cpu_buffer,
 
 	nr_pages = nr_vma_pages;
 
-	pages = kcalloc(nr_pages, sizeof(*pages), GFP_KERNEL);
+	pages = kzalloc_objs(*pages, nr_pages, GFP_KERNEL);
 	if (!pages)
 		return -ENOMEM;