20 static struct __tasks_kfunc_map_value *insert_lookup_task(struct task_struct *task)  in insert_lookup_task()  argument
24 	status = tasks_kfunc_map_insert(task);  in insert_lookup_task()
28 	return tasks_kfunc_map_value_lookup(task);  in insert_lookup_task()
33 int BPF_PROG(task_kfunc_acquire_untrusted, struct task_struct *task, u64 clone_flags)  in BPF_PROG()  argument
38 	v = insert_lookup_task(task);  in BPF_PROG()
43 	acquired = bpf_task_acquire(v->task);  in BPF_PROG()
54 int BPF_PROG(task_kfunc_acquire_fp, struct task_struct *task, u64 clone_flags)  in BPF_PROG()  argument
70 int BPF_PROG(task_kfunc_acquire_unsafe_kretprobe, struct task_struct *task, u64 clone_flags)  in BPF_PROG()  argument
75 	acquired = bpf_task_acquire(task);  in BPF_PROG()
85 int BPF_PROG(task_kfunc_acquire_unsafe_kretprobe_rcu, struct task_struct *task, u64 clone_flags)  in BPF_PROG()  argument
90 	if (!task) {  in BPF_PROG()
95 	acquired = bpf_task_acquire(task);  in BPF_PROG()
105 int BPF_PROG(task_kfunc_acquire_null, struct task_struct *task, u64 clone_flags)  in BPF_PROG()  argument
120 int BPF_PROG(task_kfunc_acquire_unreleased, struct task_struct *task, u64 clone_flags)  in BPF_PROG()  argument
124 	acquired = bpf_task_acquire(task);  in BPF_PROG()
126 	/* Acquired task is never released. */  in BPF_PROG()
134 int BPF_PROG(task_kfunc_xchg_unreleased, struct task_struct *task, u64 clone_flags)  in BPF_PROG()  argument
139 	v = insert_lookup_task(task);  in BPF_PROG()
143 	kptr = bpf_kptr_xchg(&v->task, NULL);  in BPF_PROG()
154 int BPF_PROG(task_kfunc_acquire_release_no_null_check, struct task_struct *task, u64 clone_flags)  in BPF_PROG()  argument
158 	acquired = bpf_task_acquire(task);  in BPF_PROG()
159 	/* Can't invoke bpf_task_release() on an acquired task without a NULL check. */  in BPF_PROG()
167 int BPF_PROG(task_kfunc_release_untrusted, struct task_struct *task, u64 clone_flags)  in BPF_PROG()  argument
171 	v = insert_lookup_task(task);  in BPF_PROG()
176 	bpf_task_release(v->task);  in BPF_PROG()
183 int BPF_PROG(task_kfunc_release_fp, struct task_struct *task, u64 clone_flags)  in BPF_PROG()  argument
195 int BPF_PROG(task_kfunc_release_null, struct task_struct *task, u64 clone_flags)  in BPF_PROG()  argument
202 	status = bpf_probe_read_kernel(&pid, sizeof(pid), &task->pid);  in BPF_PROG()
206 	local.task = NULL;  in BPF_PROG()
215 	acquired = bpf_task_acquire(task);  in BPF_PROG()
219 	old = bpf_kptr_xchg(&v->task, acquired);  in BPF_PROG()
229 int BPF_PROG(task_kfunc_release_unacquired, struct task_struct *task, u64 clone_flags)  in BPF_PROG()  argument
231 	/* Cannot release trusted task pointer which was not acquired. */  in BPF_PROG()
232 	bpf_task_release(task);  in BPF_PROG()
239 int BPF_PROG(task_kfunc_obj_drop_with_kptr, struct task_struct *task, u64 clone_flags)  in BPF_PROG()  argument
253 int BPF_PROG(task_kfunc_obj_drop_nmi_with_kptr, struct task_struct *task,  in BPF_PROG()  argument
265 	acquired = bpf_task_acquire(task);  in BPF_PROG()
267 		old = bpf_kptr_xchg(&local->task, acquired);  in BPF_PROG()
278 int BPF_PROG(task_kfunc_from_pid_no_null_check, struct task_struct *task, u64 clone_flags)  in BPF_PROG()  argument
282 	acquired = bpf_task_from_pid(task->pid);  in BPF_PROG()
292 int BPF_PROG(task_kfunc_from_vpid_no_null_check, struct task_struct *task, u64 clone_flags)  in BPF_PROG()  argument
296 	acquired = bpf_task_from_vpid(task->pid);  in BPF_PROG()
306 int BPF_PROG(task_kfunc_from_lsm_task_free, struct task_struct *task)  in BPF_PROG()  argument
311 	acquired = bpf_task_acquire(task);  in BPF_PROG()
321 int BPF_PROG(task_access_comm1, struct task_struct *task, u64 clone_flags)  in BPF_PROG()  argument
323 	bpf_strncmp(task->comm, 17, "foo");  in BPF_PROG()
329 int BPF_PROG(task_access_comm2, struct task_struct *task, u64 clone_flags)  in BPF_PROG()  argument
331 	bpf_strncmp(task->comm + 1, 16, "foo");  in BPF_PROG()
337 int BPF_PROG(task_access_comm3, struct task_struct *task, u64 clone_flags)  in BPF_PROG()  argument
339 	bpf_probe_read_kernel(task->comm, 16, task->comm);  in BPF_PROG()
345 int BPF_PROG(task_access_comm4, struct task_struct *task, const char *buf, bool exec)  in BPF_PROG()  argument
348 	 * task->comm is a legacy ptr_to_btf_id. The verifier cannot guarantee  in BPF_PROG()
351 	bpf_strncmp(task->comm, 16, "foo");  in BPF_PROG()
357 int BPF_PROG(task_kfunc_release_in_map, struct task_struct *task, u64 clone_flags)  in BPF_PROG()  argument
362 	if (tasks_kfunc_map_insert(task))  in BPF_PROG()
365 	v = tasks_kfunc_map_value_lookup(task);  in BPF_PROG()
370 	local = v->task;  in BPF_PROG()
387 	struct task_struct *task, *acquired;  in BPF_PROG()  local
395 	task = v->task;  in BPF_PROG()
397 	if (!task)  in BPF_PROG()
400 	acquired = bpf_task_acquire(task);  in BPF_PROG()
411 	struct task_struct *task, *acquired;  in BPF_PROG()  local
419 	task = v->task;  in BPF_PROG()
421 	if (!task)  in BPF_PROG()
424 	acquired = bpf_task_acquire(task);  in BPF_PROG()
435 	struct task_struct *task, *acquired;  in BPF_PROG()  local
444 	task = v->task;  in BPF_PROG()
446 	if (!task)  in BPF_PROG()
449 	acquired = bpf_task_acquire(task);  in BPF_PROG()