241 int cap_capset(struct cred *new,  in cap_capset()  argument
268 	new->cap_effective   = *effective;  in cap_capset()
269 	new->cap_inheritable = *inheritable;  in cap_capset()
270 	new->cap_permitted   = *permitted;  in cap_capset()
276 	new->cap_ambient = cap_intersect(new->cap_ambient,  in cap_capset()
279 	if (WARN_ON(!cap_ambient_invariant_ok(new)))  in cap_capset()
554 	struct cred *new = bprm->cred;  in bprm_caps_from_vfs_caps()  local
572 		new->cap_permitted.cap[i] =  in bprm_caps_from_vfs_caps()
573 			(new->cap_bset.cap[i] & permitted) |  in bprm_caps_from_vfs_caps()
574 			(new->cap_inheritable.cap[i] & inheritable);  in bprm_caps_from_vfs_caps()
576 		if (permitted & ~new->cap_permitted.cap[i])  in bprm_caps_from_vfs_caps()
739 	struct cred *new = bprm->cred;  in handle_privileged_root()  local
748 	if (has_fcap && __is_suid(root_uid, new)) {  in handle_privileged_root()
757 	if (__is_eff(root_uid, new) || __is_real(root_uid, new)) {  in handle_privileged_root()
759 		new->cap_permitted = cap_combine(old->cap_bset,  in handle_privileged_root()
765 	if (__is_eff(root_uid, new))  in handle_privileged_root()
776 static inline bool __is_setuid(struct cred *new, const struct cred *old)  in __is_setuid()  argument
777 { return !uid_eq(new->euid, old->uid); }  in __is_setuid()
779 static inline bool __is_setgid(struct cred *new, const struct cred *old)  in __is_setgid()  argument
780 { return !gid_eq(new->egid, old->gid); }  in __is_setgid()
799 static inline bool nonroot_raised_pE(struct cred *new, const struct cred *old,  in nonroot_raised_pE()  argument
804 	if ((__cap_grew(effective, ambient, new) &&  in nonroot_raised_pE()
805 	     !(__cap_full(effective, new) &&  in nonroot_raised_pE()
806 	       (__is_eff(root, new) || __is_real(root, new)) &&  in nonroot_raised_pE()
809 	     __is_suid(root, new) &&  in nonroot_raised_pE()
810 	     !__cap_full(effective, new)) ||  in nonroot_raised_pE()
811 	    (!__is_setuid(new, old) &&  in nonroot_raised_pE()
813 	       __cap_gained(permitted, new, old)) ||  in nonroot_raised_pE()
814 	      __cap_gained(ambient, new, old))))  in nonroot_raised_pE()
834 	struct cred *new = bprm->cred;  in cap_bprm_creds_from_file()  local
846 	root_uid = make_kuid(new->user_ns, 0);  in cap_bprm_creds_from_file()
851 	if (__cap_gained(permitted, new, old))  in cap_bprm_creds_from_file()
859 	is_setid = __is_setuid(new, old) || __is_setgid(new, old);  in cap_bprm_creds_from_file()
861 	if ((is_setid || __cap_gained(permitted, new, old)) &&  in cap_bprm_creds_from_file()
863 	     !ptracer_capable(current, new->user_ns))) {  in cap_bprm_creds_from_file()
865 		if (!ns_capable(new->user_ns, CAP_SETUID) ||  in cap_bprm_creds_from_file()
867 			new->euid = new->uid;  in cap_bprm_creds_from_file()
868 			new->egid = new->gid;  in cap_bprm_creds_from_file()
870 		new->cap_permitted = cap_intersect(new->cap_permitted,  in cap_bprm_creds_from_file()
874 	new->suid = new->fsuid = new->euid;  in cap_bprm_creds_from_file()
875 	new->sgid = new->fsgid = new->egid;  in cap_bprm_creds_from_file()
879 		cap_clear(new->cap_ambient);  in cap_bprm_creds_from_file()
885 	new->cap_permitted = cap_combine(new->cap_permitted, new->cap_ambient);  in cap_bprm_creds_from_file()
892 		new->cap_effective = new->cap_permitted;  in cap_bprm_creds_from_file()
894 		new->cap_effective = new->cap_ambient;  in cap_bprm_creds_from_file()
896 	if (WARN_ON(!cap_ambient_invariant_ok(new)))  in cap_bprm_creds_from_file()
899 	if (nonroot_raised_pE(new, old, root_uid, has_fcap)) {  in cap_bprm_creds_from_file()
900 		ret = audit_log_bprm_fcaps(bprm, new, old);  in cap_bprm_creds_from_file()
905 	new->securebits &= ~issecure_mask(SECURE_KEEP_CAPS);  in cap_bprm_creds_from_file()
907 	if (WARN_ON(!cap_ambient_invariant_ok(new)))  in cap_bprm_creds_from_file()
912 	    (!__is_real(root_uid, new) &&  in cap_bprm_creds_from_file()
914 	      __cap_grew(permitted, ambient, new))))  in cap_bprm_creds_from_file()
1020 static inline void cap_emulate_setxuid(struct cred *new, const struct cred *old)  in cap_emulate_setxuid()  argument
1027 	    (!uid_eq(new->uid, root_uid) &&  in cap_emulate_setxuid()
1028 	     !uid_eq(new->euid, root_uid) &&  in cap_emulate_setxuid()
1029 	     !uid_eq(new->suid, root_uid))) {  in cap_emulate_setxuid()
1031 			cap_clear(new->cap_permitted);  in cap_emulate_setxuid()
1032 			cap_clear(new->cap_effective);  in cap_emulate_setxuid()
1040 		cap_clear(new->cap_ambient);  in cap_emulate_setxuid()
1042 	if (uid_eq(old->euid, root_uid) && !uid_eq(new->euid, root_uid))  in cap_emulate_setxuid()
1043 		cap_clear(new->cap_effective);  in cap_emulate_setxuid()
1044 	if (!uid_eq(old->euid, root_uid) && uid_eq(new->euid, root_uid))  in cap_emulate_setxuid()
1045 		new->cap_effective = new->cap_permitted;  in cap_emulate_setxuid()
1057 int cap_task_fix_setuid(struct cred *new, const struct cred *old, int flags)  in cap_task_fix_setuid()  argument
1066 			cap_emulate_setxuid(new, old);  in cap_task_fix_setuid()
1078 			if (uid_eq(old->fsuid, root_uid) && !uid_eq(new->fsuid, root_uid))  in cap_task_fix_setuid()
1079 				new->cap_effective =  in cap_task_fix_setuid()
1080 					cap_drop_fs_set(new->cap_effective);  in cap_task_fix_setuid()
1082 			if (!uid_eq(old->fsuid, root_uid) && uid_eq(new->fsuid, root_uid))  in cap_task_fix_setuid()
1083 				new->cap_effective =  in cap_task_fix_setuid()
1084 					cap_raise_fs_set(new->cap_effective,  in cap_task_fix_setuid()
1085 							 new->cap_permitted);  in cap_task_fix_setuid()
1164 	struct cred *new;  in cap_prctl_drop()  local
1171 	new = prepare_creds();  in cap_prctl_drop()
1172 	if (!new)  in cap_prctl_drop()
1174 	cap_lower(new->cap_bset, cap);  in cap_prctl_drop()
1175 	return commit_creds(new);  in cap_prctl_drop()
1194 	struct cred *new;  in cap_task_prctl()  local
1244 		new = prepare_creds();  in cap_task_prctl()
1245 		if (!new)  in cap_task_prctl()
1247 		new->securebits = arg2;  in cap_task_prctl()
1248 		return commit_creds(new);  in cap_task_prctl()
1262 		new = prepare_creds();  in cap_task_prctl()
1263 		if (!new)  in cap_task_prctl()
1266 			new->securebits |= issecure_mask(SECURE_KEEP_CAPS);  in cap_task_prctl()
1268 			new->securebits &= ~issecure_mask(SECURE_KEEP_CAPS);  in cap_task_prctl()
1269 		return commit_creds(new);  in cap_task_prctl()
1276 			new = prepare_creds();  in cap_task_prctl()
1277 			if (!new)  in cap_task_prctl()
1279 			cap_clear(new->cap_ambient);  in cap_task_prctl()
1280 			return commit_creds(new);  in cap_task_prctl()
1299 			new = prepare_creds();  in cap_task_prctl()
1300 			if (!new)  in cap_task_prctl()
1303 				cap_raise(new->cap_ambient, arg3);  in cap_task_prctl()
1305 				cap_lower(new->cap_ambient, arg3);  in cap_task_prctl()
1306 			return commit_creds(new);  in cap_task_prctl()