266 				current->comm, current->pid, sig);  in print_dropped_signal()
843 	struct pid *sid;  in check_kill_permission()
1471 int __kill_pgrp_info(int sig, struct kernel_siginfo *info, struct pid *pgrp)  in __kill_pgrp_info()
1486 int kill_pid_info(int sig, struct kernel_siginfo *info, struct pid *pid)  in kill_pid_info()  argument
1493 		p = pid_task(pid, PIDTYPE_PID);  in kill_pid_info()
1508 static int kill_proc_info(int sig, struct kernel_siginfo *info, pid_t pid)  in kill_proc_info()  argument
1512 	error = kill_pid_info(sig, info, find_vpid(pid));  in kill_proc_info()
1554 			 struct pid *pid, const struct cred *cred)  in kill_pid_usb_asyncio()  argument
1571 	p = pid_task(pid, PIDTYPE_PID);  in kill_pid_usb_asyncio()
1604 static int kill_something_info(int sig, struct kernel_siginfo *info, pid_t pid)  in kill_something_info()  argument
1608 	if (pid > 0)  in kill_something_info()
1609 		return kill_proc_info(sig, info, pid);  in kill_something_info()
1612 	if (pid == INT_MIN)  in kill_something_info()
1616 	if (pid != -1) {  in kill_something_info()
1618 				pid ? find_vpid(-pid) : task_pgrp(current));  in kill_something_info()
1921 int kill_pgrp(struct pid *pid, int sig, int priv)  in kill_pgrp()  argument
1926 	ret = __kill_pgrp_info(sig, __si_special(priv), pid);  in kill_pgrp()
1933 int kill_pid(struct pid *pid, int sig, int priv)  in kill_pid()  argument
1935 	return kill_pid_info(sig, __si_special(priv), pid);  in kill_pid()
1978 int send_sigqueue(struct sigqueue *q, struct pid *pid, enum pid_type type)  in send_sigqueue()  argument
2002 	t = pid_task(pid, type);  in send_sigqueue()
2044 	struct pid *pid;  in do_notify_pidfd()  local
2047 	pid = task_pid(task);  in do_notify_pidfd()
2048 	wake_up_all(&pid->wait_pidfd);  in do_notify_pidfd()
3815 SYSCALL_DEFINE2(kill, pid_t, pid, int, sig)  in SYSCALL_DEFINE2()  argument
3821 	return kill_something_info(sig, &info, pid);  in SYSCALL_DEFINE2()
3829 static bool access_pidfd_pidns(struct pid *pid)  in access_pidfd_pidns()  argument
3832 	struct pid_namespace *p = ns_of_pid(pid);  in access_pidfd_pidns()
3861 static struct pid *pidfd_to_pid(const struct file *file)  in pidfd_to_pid()
3863 	struct pid *pid;  in pidfd_to_pid()  local
3865 	pid = pidfd_pid(file);  in pidfd_to_pid()
3866 	if (!IS_ERR(pid))  in pidfd_to_pid()
3867 		return pid;  in pidfd_to_pid()
3895 	struct pid *pid;  in SYSCALL_DEFINE4()  local
3907 	pid = pidfd_to_pid(f.file);  in SYSCALL_DEFINE4()
3908 	if (IS_ERR(pid)) {  in SYSCALL_DEFINE4()
3909 		ret = PTR_ERR(pid);  in SYSCALL_DEFINE4()
3914 	if (!access_pidfd_pidns(pid))  in SYSCALL_DEFINE4()
3928 		if ((task_pid(current) != pid) &&  in SYSCALL_DEFINE4()
3935 	ret = kill_pid_info(sig, &kinfo, pid);  in SYSCALL_DEFINE4()
3943 do_send_specific(pid_t tgid, pid_t pid, int sig, struct kernel_siginfo *info)  in do_send_specific()  argument
3949 	p = find_task_by_vpid(pid);  in do_send_specific()
3972 static int do_tkill(pid_t tgid, pid_t pid, int sig)  in do_tkill()  argument
3983 	return do_send_specific(tgid, pid, sig, &info);  in do_tkill()
3996 SYSCALL_DEFINE3(tgkill, pid_t, tgid, pid_t, pid, int, sig)  in SYSCALL_DEFINE3()  argument
3999 	if (pid <= 0 || tgid <= 0)  in SYSCALL_DEFINE3()
4002 	return do_tkill(tgid, pid, sig);  in SYSCALL_DEFINE3()
4012 SYSCALL_DEFINE2(tkill, pid_t, pid, int, sig)  in SYSCALL_DEFINE2()  argument
4015 	if (pid <= 0)  in SYSCALL_DEFINE2()
4018 	return do_tkill(0, pid, sig);  in SYSCALL_DEFINE2()
4021 static int do_rt_sigqueueinfo(pid_t pid, int sig, kernel_siginfo_t *info)  in do_rt_sigqueueinfo()  argument
4027 	    (task_pid_vnr(current) != pid))  in do_rt_sigqueueinfo()
4031 	return kill_proc_info(sig, info, pid);  in do_rt_sigqueueinfo()
4040 SYSCALL_DEFINE3(rt_sigqueueinfo, pid_t, pid, int, sig,  in SYSCALL_DEFINE3()  argument
4047 	return do_rt_sigqueueinfo(pid, sig, &info);  in SYSCALL_DEFINE3()
4052 			compat_pid_t, pid,  in COMPAT_SYSCALL_DEFINE3()  argument
4060 	return do_rt_sigqueueinfo(pid, sig, &info);  in COMPAT_SYSCALL_DEFINE3()
4064 static int do_rt_tgsigqueueinfo(pid_t tgid, pid_t pid, int sig, kernel_siginfo_t *info)  in do_rt_tgsigqueueinfo()  argument
4067 	if (pid <= 0 || tgid <= 0)  in do_rt_tgsigqueueinfo()
4074 	    (task_pid_vnr(current) != pid))  in do_rt_tgsigqueueinfo()
4077 	return do_send_specific(tgid, pid, sig, info);  in do_rt_tgsigqueueinfo()
4080 SYSCALL_DEFINE4(rt_tgsigqueueinfo, pid_t, tgid, pid_t, pid, int, sig,  in SYSCALL_DEFINE4()  argument
4087 	return do_rt_tgsigqueueinfo(tgid, pid, sig, &info);  in SYSCALL_DEFINE4()
4093 			compat_pid_t, pid,  in COMPAT_SYSCALL_DEFINE4()  argument
4101 	return do_rt_tgsigqueueinfo(tgid, pid, sig, &info);  in COMPAT_SYSCALL_DEFINE4()
4863 			   sig, t->pid);  in kdb_send_sig()
4865 		kdb_printf("Signal %d is sent to process %d.\n", sig, t->pid);  in kdb_send_sig()