// SPDX-License-Identifier: GPL-2.0-only/* * ksyms_common.c: A split of kernel/kallsyms.c * Contains a few generic function definations independent of config KALLSYMS. */#include <linux/kallsyms.h>#include <linux/security.h> static inline int kallsyms_for_perf(void){#ifdef CONFIG_PERF_EVENTS	extern int sysctl_perf_event_paranoid; 	if (sysctl_perf_event_paranoid <= 1)		return 1;#endif	return 0;} /* * We show kallsyms information even to normal users if we've enabled * kernel profiling and are explicitly not paranoid (so kptr_restrict * is clear, and sysctl_perf_event_paranoid isn't set). * * Otherwise, require CAP_SYSLOG (assuming kptr_restrict isn't set to * block even that). */bool kallsyms_show_value(const struct cred *cred){	switch (kptr_restrict) {	case 0:		if (kallsyms_for_perf())			return true;		fallthrough;	case 1:		if (security_capable(cred, &init_user_ns, CAP_SYSLOG,				     CAP_OPT_NOAUDIT) == 0)			return true;		fallthrough;	default:		return false;	}}