From 69050f8d6d075dc01af7a5f2f550a8067510366f Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Fri, 20 Feb 2026 23:49:23 -0800 Subject: 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 --- kernel/kthread.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) (limited to 'kernel/kthread.c') diff --git a/kernel/kthread.c b/kernel/kthread.c index c9507689e181..0b4f7328096f 100644 --- a/kernel/kthread.c +++ b/kernel/kthread.c @@ -122,7 +122,7 @@ bool set_kthread_struct(struct task_struct *p) if (WARN_ON_ONCE(to_kthread(p))) return false; - kthread = kzalloc(sizeof(*kthread), GFP_KERNEL); + kthread = kzalloc_obj(*kthread, GFP_KERNEL); if (!kthread) return false; @@ -511,8 +511,7 @@ struct task_struct *__kthread_create_on_node(int (*threadfn)(void *data), { DECLARE_COMPLETION_ONSTACK(done); struct task_struct *task; - struct kthread_create_info *create = kmalloc(sizeof(*create), - GFP_KERNEL); + struct kthread_create_info *create = kmalloc_obj(*create, GFP_KERNEL); if (!create) return ERR_PTR(-ENOMEM); @@ -1084,7 +1083,7 @@ __kthread_create_worker_on_node(unsigned int flags, int node, struct kthread_worker *worker; struct task_struct *task; - worker = kzalloc(sizeof(*worker), GFP_KERNEL); + worker = kzalloc_obj(*worker, GFP_KERNEL); if (!worker) return ERR_PTR(-ENOMEM); -- cgit v1.2.3