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/fs/overlayfs/readdir.c b/fs/overlayfs/readdir.c
index bb09142b4e15..953c2cdca1b4 100644
--- a/fs/overlayfs/readdir.c
+++ b/fs/overlayfs/readdir.c
@@ -180,7 +180,7 @@ static struct ovl_cache_entry *ovl_cache_entry_new(struct ovl_readdir_data *rdd,
 {
 	struct ovl_cache_entry *p;
 
-	p = kmalloc(struct_size(p, name, len + 1), GFP_KERNEL);
+	p = kmalloc_flex(*p, name, len + 1, GFP_KERNEL);
 	if (!p)
 		return NULL;
 
@@ -493,7 +493,7 @@ static struct ovl_dir_cache *ovl_cache_get(struct dentry *dentry)
 	}
 	ovl_set_dir_cache(d_inode(dentry), NULL);
 
-	cache = kzalloc(sizeof(struct ovl_dir_cache), GFP_KERNEL);
+	cache = kzalloc_obj(struct ovl_dir_cache, GFP_KERNEL);
 	if (!cache)
 		return ERR_PTR(-ENOMEM);
 
@@ -706,7 +706,7 @@ static struct ovl_dir_cache *ovl_cache_get_impure(const struct path *path)
 	ovl_dir_cache_free(inode);
 	ovl_set_dir_cache(inode, NULL);
 
-	cache = kzalloc(sizeof(struct ovl_dir_cache), GFP_KERNEL);
+	cache = kzalloc_obj(struct ovl_dir_cache, GFP_KERNEL);
 	if (!cache)
 		return ERR_PTR(-ENOMEM);