266 				current->comm, current->pid, sig);  in print_dropped_signal()
833 	struct pid *sid;  in check_kill_permission()
1455 int __kill_pgrp_info(int sig, struct kernel_siginfo *info, struct pid *pgrp)  in __kill_pgrp_info()
1470 int kill_pid_info(int sig, struct kernel_siginfo *info, struct pid *pid)  in kill_pid_info()  argument
1477 		p = pid_task(pid, PIDTYPE_PID);  in kill_pid_info()
1492 static int kill_proc_info(int sig, struct kernel_siginfo *info, pid_t pid)  in kill_proc_info()  argument
1496 	error = kill_pid_info(sig, info, find_vpid(pid));  in kill_proc_info()
1538 			 struct pid *pid, const struct cred *cred)  in kill_pid_usb_asyncio()  argument
1555 	p = pid_task(pid, PIDTYPE_PID);  in kill_pid_usb_asyncio()
1588 static int kill_something_info(int sig, struct kernel_siginfo *info, pid_t pid)  in kill_something_info()  argument
1592 	if (pid > 0)  in kill_something_info()
1593 		return kill_proc_info(sig, info, pid);  in kill_something_info()
1596 	if (pid == INT_MIN)  in kill_something_info()
1600 	if (pid != -1) {  in kill_something_info()
1602 				pid ? find_vpid(-pid) : task_pgrp(current));  in kill_something_info()
1904 int kill_pgrp(struct pid *pid, int sig, int priv)  in kill_pgrp()  argument
1909 	ret = __kill_pgrp_info(sig, __si_special(priv), pid);  in kill_pgrp()
1916 int kill_pid(struct pid *pid, int sig, int priv)  in kill_pid()  argument
1918 	return kill_pid_info(sig, __si_special(priv), pid);  in kill_pid()
1961 int send_sigqueue(struct sigqueue *q, struct pid *pid, enum pid_type type)  in send_sigqueue()  argument
1973 	t = pid_task(pid, type);  in send_sigqueue()
2011 	struct pid *pid;  in do_notify_pidfd()  local
2014 	pid = task_pid(task);  in do_notify_pidfd()
2015 	wake_up_all(&pid->wait_pidfd);  in do_notify_pidfd()
3803 SYSCALL_DEFINE2(kill, pid_t, pid, int, sig)  in SYSCALL_DEFINE2()  argument
3809 	return kill_something_info(sig, &info, pid);  in SYSCALL_DEFINE2()
3817 static bool access_pidfd_pidns(struct pid *pid)  in access_pidfd_pidns()  argument
3820 	struct pid_namespace *p = ns_of_pid(pid);  in access_pidfd_pidns()
3849 static struct pid *pidfd_to_pid(const struct file *file)  in pidfd_to_pid()
3851 	struct pid *pid;  in pidfd_to_pid()  local
3853 	pid = pidfd_pid(file);  in pidfd_to_pid()
3854 	if (!IS_ERR(pid))  in pidfd_to_pid()
3855 		return pid;  in pidfd_to_pid()
3883 	struct pid *pid;  in SYSCALL_DEFINE4()  local
3895 	pid = pidfd_to_pid(f.file);  in SYSCALL_DEFINE4()
3896 	if (IS_ERR(pid)) {  in SYSCALL_DEFINE4()
3897 		ret = PTR_ERR(pid);  in SYSCALL_DEFINE4()
3902 	if (!access_pidfd_pidns(pid))  in SYSCALL_DEFINE4()
3916 		if ((task_pid(current) != pid) &&  in SYSCALL_DEFINE4()
3923 	ret = kill_pid_info(sig, &kinfo, pid);  in SYSCALL_DEFINE4()
3931 do_send_specific(pid_t tgid, pid_t pid, int sig, struct kernel_siginfo *info)  in do_send_specific()  argument
3937 	p = find_task_by_vpid(pid);  in do_send_specific()
3960 static int do_tkill(pid_t tgid, pid_t pid, int sig)  in do_tkill()  argument
3971 	return do_send_specific(tgid, pid, sig, &info);  in do_tkill()
3984 SYSCALL_DEFINE3(tgkill, pid_t, tgid, pid_t, pid, int, sig)  in SYSCALL_DEFINE3()  argument
3987 	if (pid <= 0 || tgid <= 0)  in SYSCALL_DEFINE3()
3990 	return do_tkill(tgid, pid, sig);  in SYSCALL_DEFINE3()
4000 SYSCALL_DEFINE2(tkill, pid_t, pid, int, sig)  in SYSCALL_DEFINE2()  argument
4003 	if (pid <= 0)  in SYSCALL_DEFINE2()
4006 	return do_tkill(0, pid, sig);  in SYSCALL_DEFINE2()
4009 static int do_rt_sigqueueinfo(pid_t pid, int sig, kernel_siginfo_t *info)  in do_rt_sigqueueinfo()  argument
4015 	    (task_pid_vnr(current) != pid))  in do_rt_sigqueueinfo()
4019 	return kill_proc_info(sig, info, pid);  in do_rt_sigqueueinfo()
4028 SYSCALL_DEFINE3(rt_sigqueueinfo, pid_t, pid, int, sig,  in SYSCALL_DEFINE3()  argument
4035 	return do_rt_sigqueueinfo(pid, sig, &info);  in SYSCALL_DEFINE3()
4040 			compat_pid_t, pid,  in COMPAT_SYSCALL_DEFINE3()  argument
4048 	return do_rt_sigqueueinfo(pid, sig, &info);  in COMPAT_SYSCALL_DEFINE3()
4052 static int do_rt_tgsigqueueinfo(pid_t tgid, pid_t pid, int sig, kernel_siginfo_t *info)  in do_rt_tgsigqueueinfo()  argument
4055 	if (pid <= 0 || tgid <= 0)  in do_rt_tgsigqueueinfo()
4062 	    (task_pid_vnr(current) != pid))  in do_rt_tgsigqueueinfo()
4065 	return do_send_specific(tgid, pid, sig, info);  in do_rt_tgsigqueueinfo()
4068 SYSCALL_DEFINE4(rt_tgsigqueueinfo, pid_t, tgid, pid_t, pid, int, sig,  in SYSCALL_DEFINE4()  argument
4075 	return do_rt_tgsigqueueinfo(tgid, pid, sig, &info);  in SYSCALL_DEFINE4()
4081 			compat_pid_t, pid,  in COMPAT_SYSCALL_DEFINE4()  argument
4089 	return do_rt_tgsigqueueinfo(tgid, pid, sig, &info);  in COMPAT_SYSCALL_DEFINE4()
4797 			   sig, t->pid);  in kdb_send_sig()
4799 		kdb_printf("Signal %d is sent to process %d.\n", sig, t->pid);  in kdb_send_sig()