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, 5 insertions, 5 deletions

diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c
index 8af4351536cf..7d220276d019 100644
--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
@@ -1168,7 +1168,7 @@ static int allocate_cgrp_cset_links(int count, struct list_head *tmp_links)
 	INIT_LIST_HEAD(tmp_links);
 
 	for (i = 0; i < count; i++) {
-		link = kzalloc(sizeof(*link), GFP_KERNEL);
+		link = kzalloc_obj(*link, GFP_KERNEL);
 		if (!link) {
 			free_cgrp_cset_links(tmp_links);
 			return -ENOMEM;
@@ -1241,7 +1241,7 @@ static struct css_set *find_css_set(struct css_set *old_cset,
 	if (cset)
 		return cset;
 
-	cset = kzalloc(sizeof(*cset), GFP_KERNEL);
+	cset = kzalloc_obj(*cset, GFP_KERNEL);
 	if (!cset)
 		return NULL;
 
@@ -2350,7 +2350,7 @@ static int cgroup_init_fs_context(struct fs_context *fc)
 {
 	struct cgroup_fs_context *ctx;
 
-	ctx = kzalloc(sizeof(struct cgroup_fs_context), GFP_KERNEL);
+	ctx = kzalloc_obj(struct cgroup_fs_context, GFP_KERNEL);
 	if (!ctx)
 		return -ENOMEM;
 
@@ -4251,7 +4251,7 @@ static int cgroup_file_open(struct kernfs_open_file *of)
 	struct cgroup_file_ctx *ctx;
 	int ret;
 
-	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
+	ctx = kzalloc_obj(*ctx, GFP_KERNEL);
 	if (!ctx)
 		return -ENOMEM;
 
@@ -5844,7 +5844,7 @@ static struct cgroup *cgroup_create(struct cgroup *parent, const char *name,
 	int ret;
 
 	/* allocate the cgroup and its ID, 0 is reserved for the root */
-	cgrp = kzalloc(struct_size(cgrp, _low_ancestors, level), GFP_KERNEL);
+	cgrp = kzalloc_flex(*cgrp, _low_ancestors, level, GFP_KERNEL);
 	if (!cgrp)
 		return ERR_PTR(-ENOMEM);