268 				current->comm, current->pid, sig);  in print_dropped_signal()
834 	struct pid *sid;  in check_kill_permission()
1436 int __kill_pgrp_info(int sig, struct kernel_siginfo *info, struct pid *pgrp)  in __kill_pgrp_info()
1451 int kill_pid_info(int sig, struct kernel_siginfo *info, struct pid *pid)  in kill_pid_info()  argument
1458 		p = pid_task(pid, PIDTYPE_PID);  in kill_pid_info()
1473 static int kill_proc_info(int sig, struct kernel_siginfo *info, pid_t pid)  in kill_proc_info()  argument
1477 	error = kill_pid_info(sig, info, find_vpid(pid));  in kill_proc_info()
1519 			 struct pid *pid, const struct cred *cred)  in kill_pid_usb_asyncio()  argument
1536 	p = pid_task(pid, PIDTYPE_PID);  in kill_pid_usb_asyncio()
1569 static int kill_something_info(int sig, struct kernel_siginfo *info, pid_t pid)  in kill_something_info()  argument
1573 	if (pid > 0)  in kill_something_info()
1574 		return kill_proc_info(sig, info, pid);  in kill_something_info()
1577 	if (pid == INT_MIN)  in kill_something_info()
1581 	if (pid != -1) {  in kill_something_info()
1583 				pid ? find_vpid(-pid) : task_pgrp(current));  in kill_something_info()
1793 int kill_pgrp(struct pid *pid, int sig, int priv)  in kill_pgrp()  argument
1798 	ret = __kill_pgrp_info(sig, __si_special(priv), pid);  in kill_pgrp()
1805 int kill_pid(struct pid *pid, int sig, int priv)  in kill_pid()  argument
1807 	return kill_pid_info(sig, __si_special(priv), pid);  in kill_pid()
1855 int send_sigqueue(struct sigqueue *q, struct pid *pid, enum pid_type type)  in send_sigqueue()  argument
1867 	t = pid_task(pid, type);  in send_sigqueue()
1905 	struct pid *pid;  in do_notify_pidfd()  local
1908 	pid = task_pid(task);  in do_notify_pidfd()
1909 	wake_up_all(&pid->wait_pidfd);  in do_notify_pidfd()
3687 SYSCALL_DEFINE2(kill, pid_t, pid, int, sig)  in SYSCALL_DEFINE2()  argument
3693 	return kill_something_info(sig, &info, pid);  in SYSCALL_DEFINE2()
3701 static bool access_pidfd_pidns(struct pid *pid)  in access_pidfd_pidns()  argument
3704 	struct pid_namespace *p = ns_of_pid(pid);  in access_pidfd_pidns()
3732 static struct pid *pidfd_to_pid(const struct file *file)  in pidfd_to_pid()
3734 	struct pid *pid;  in pidfd_to_pid()  local
3736 	pid = pidfd_pid(file);  in pidfd_to_pid()
3737 	if (!IS_ERR(pid))  in pidfd_to_pid()
3738 		return pid;  in pidfd_to_pid()
3766 	struct pid *pid;  in SYSCALL_DEFINE4()  local
3778 	pid = pidfd_to_pid(f.file);  in SYSCALL_DEFINE4()
3779 	if (IS_ERR(pid)) {  in SYSCALL_DEFINE4()
3780 		ret = PTR_ERR(pid);  in SYSCALL_DEFINE4()
3785 	if (!access_pidfd_pidns(pid))  in SYSCALL_DEFINE4()
3799 		if ((task_pid(current) != pid) &&  in SYSCALL_DEFINE4()
3806 	ret = kill_pid_info(sig, &kinfo, pid);  in SYSCALL_DEFINE4()
3814 do_send_specific(pid_t tgid, pid_t pid, int sig, struct kernel_siginfo *info)  in do_send_specific()  argument
3820 	p = find_task_by_vpid(pid);  in do_send_specific()
3843 static int do_tkill(pid_t tgid, pid_t pid, int sig)  in do_tkill()  argument
3854 	return do_send_specific(tgid, pid, sig, &info);  in do_tkill()
3867 SYSCALL_DEFINE3(tgkill, pid_t, tgid, pid_t, pid, int, sig)  in SYSCALL_DEFINE3()  argument
3870 	if (pid <= 0 || tgid <= 0)  in SYSCALL_DEFINE3()
3873 	return do_tkill(tgid, pid, sig);  in SYSCALL_DEFINE3()
3883 SYSCALL_DEFINE2(tkill, pid_t, pid, int, sig)  in SYSCALL_DEFINE2()  argument
3886 	if (pid <= 0)  in SYSCALL_DEFINE2()
3889 	return do_tkill(0, pid, sig);  in SYSCALL_DEFINE2()
3892 static int do_rt_sigqueueinfo(pid_t pid, int sig, kernel_siginfo_t *info)  in do_rt_sigqueueinfo()  argument
3898 	    (task_pid_vnr(current) != pid))  in do_rt_sigqueueinfo()
3902 	return kill_proc_info(sig, info, pid);  in do_rt_sigqueueinfo()
3911 SYSCALL_DEFINE3(rt_sigqueueinfo, pid_t, pid, int, sig,  in SYSCALL_DEFINE3()  argument
3918 	return do_rt_sigqueueinfo(pid, sig, &info);  in SYSCALL_DEFINE3()
3923 			compat_pid_t, pid,  in COMPAT_SYSCALL_DEFINE3()  argument
3931 	return do_rt_sigqueueinfo(pid, sig, &info);  in COMPAT_SYSCALL_DEFINE3()
3935 static int do_rt_tgsigqueueinfo(pid_t tgid, pid_t pid, int sig, kernel_siginfo_t *info)  in do_rt_tgsigqueueinfo()  argument
3938 	if (pid <= 0 || tgid <= 0)  in do_rt_tgsigqueueinfo()
3945 	    (task_pid_vnr(current) != pid))  in do_rt_tgsigqueueinfo()
3948 	return do_send_specific(tgid, pid, sig, info);  in do_rt_tgsigqueueinfo()
3951 SYSCALL_DEFINE4(rt_tgsigqueueinfo, pid_t, tgid, pid_t, pid, int, sig,  in SYSCALL_DEFINE4()  argument
3958 	return do_rt_tgsigqueueinfo(tgid, pid, sig, &info);  in SYSCALL_DEFINE4()
3964 			compat_pid_t, pid,  in COMPAT_SYSCALL_DEFINE4()  argument
3972 	return do_rt_tgsigqueueinfo(tgid, pid, sig, &info);  in COMPAT_SYSCALL_DEFINE4()
4680 			   sig, t->pid);  in kdb_send_sig()
4682 		kdb_printf("Signal %d is sent to process %d.\n", sig, t->pid);  in kdb_send_sig()