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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /security/selinux/nlmsgtab.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'security/selinux/nlmsgtab.c')
-rw-r--r--security/selinux/nlmsgtab.c218
1 files changed, 218 insertions, 0 deletions
diff --git a/security/selinux/nlmsgtab.c b/security/selinux/nlmsgtab.c
new file mode 100644
index 000000000..2ee7b4ed4
--- /dev/null
+++ b/security/selinux/nlmsgtab.c
@@ -0,0 +1,218 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Netlink message type permission tables, for user generated messages.
+ *
+ * Author: James Morris <jmorris@redhat.com>
+ *
+ * Copyright (C) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com>
+ */
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/netlink.h>
+#include <linux/rtnetlink.h>
+#include <linux/if.h>
+#include <linux/inet_diag.h>
+#include <linux/xfrm.h>
+#include <linux/audit.h>
+#include <linux/sock_diag.h>
+
+#include "flask.h"
+#include "av_permissions.h"
+#include "security.h"
+
+struct nlmsg_perm {
+ u16 nlmsg_type;
+ u32 perm;
+};
+
+static const struct nlmsg_perm nlmsg_route_perms[] = {
+ { RTM_NEWLINK, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_DELLINK, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_GETLINK, NETLINK_ROUTE_SOCKET__NLMSG_READ },
+ { RTM_SETLINK, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_NEWADDR, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_DELADDR, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_GETADDR, NETLINK_ROUTE_SOCKET__NLMSG_READ },
+ { RTM_NEWROUTE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_DELROUTE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_GETROUTE, NETLINK_ROUTE_SOCKET__NLMSG_READ },
+ { RTM_NEWNEIGH, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_DELNEIGH, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_GETNEIGH, NETLINK_ROUTE_SOCKET__NLMSG_READ },
+ { RTM_NEWRULE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_DELRULE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_GETRULE, NETLINK_ROUTE_SOCKET__NLMSG_READ },
+ { RTM_NEWQDISC, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_DELQDISC, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_GETQDISC, NETLINK_ROUTE_SOCKET__NLMSG_READ },
+ { RTM_NEWTCLASS, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_DELTCLASS, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_GETTCLASS, NETLINK_ROUTE_SOCKET__NLMSG_READ },
+ { RTM_NEWTFILTER, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_DELTFILTER, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_GETTFILTER, NETLINK_ROUTE_SOCKET__NLMSG_READ },
+ { RTM_NEWACTION, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_DELACTION, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_GETACTION, NETLINK_ROUTE_SOCKET__NLMSG_READ },
+ { RTM_NEWPREFIX, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_GETMULTICAST, NETLINK_ROUTE_SOCKET__NLMSG_READ },
+ { RTM_GETANYCAST, NETLINK_ROUTE_SOCKET__NLMSG_READ },
+ { RTM_GETNEIGHTBL, NETLINK_ROUTE_SOCKET__NLMSG_READ },
+ { RTM_SETNEIGHTBL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_NEWADDRLABEL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_DELADDRLABEL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_GETADDRLABEL, NETLINK_ROUTE_SOCKET__NLMSG_READ },
+ { RTM_GETDCB, NETLINK_ROUTE_SOCKET__NLMSG_READ },
+ { RTM_SETDCB, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_NEWNETCONF, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_DELNETCONF, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_GETNETCONF, NETLINK_ROUTE_SOCKET__NLMSG_READ },
+ { RTM_NEWMDB, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_DELMDB, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_GETMDB, NETLINK_ROUTE_SOCKET__NLMSG_READ },
+ { RTM_NEWNSID, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_DELNSID, NETLINK_ROUTE_SOCKET__NLMSG_READ },
+ { RTM_GETNSID, NETLINK_ROUTE_SOCKET__NLMSG_READ },
+ { RTM_NEWSTATS, NETLINK_ROUTE_SOCKET__NLMSG_READ },
+ { RTM_GETSTATS, NETLINK_ROUTE_SOCKET__NLMSG_READ },
+ { RTM_SETSTATS, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_NEWCACHEREPORT, NETLINK_ROUTE_SOCKET__NLMSG_READ },
+ { RTM_NEWCHAIN, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_DELCHAIN, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_GETCHAIN, NETLINK_ROUTE_SOCKET__NLMSG_READ },
+ { RTM_NEWNEXTHOP, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_DELNEXTHOP, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_GETNEXTHOP, NETLINK_ROUTE_SOCKET__NLMSG_READ },
+ { RTM_NEWLINKPROP, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_DELLINKPROP, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_NEWVLAN, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_DELVLAN, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_GETVLAN, NETLINK_ROUTE_SOCKET__NLMSG_READ },
+ { RTM_NEWNEXTHOPBUCKET, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_DELNEXTHOPBUCKET, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_GETNEXTHOPBUCKET, NETLINK_ROUTE_SOCKET__NLMSG_READ },
+ { RTM_NEWTUNNEL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_DELTUNNEL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+ { RTM_GETTUNNEL, NETLINK_ROUTE_SOCKET__NLMSG_READ },
+};
+
+static const struct nlmsg_perm nlmsg_tcpdiag_perms[] = {
+ { TCPDIAG_GETSOCK, NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
+ { DCCPDIAG_GETSOCK, NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
+ { SOCK_DIAG_BY_FAMILY, NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
+ { SOCK_DESTROY, NETLINK_TCPDIAG_SOCKET__NLMSG_WRITE },
+};
+
+static const struct nlmsg_perm nlmsg_xfrm_perms[] = {
+ { XFRM_MSG_NEWSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
+ { XFRM_MSG_DELSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
+ { XFRM_MSG_GETSA, NETLINK_XFRM_SOCKET__NLMSG_READ },
+ { XFRM_MSG_NEWPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
+ { XFRM_MSG_DELPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
+ { XFRM_MSG_GETPOLICY, NETLINK_XFRM_SOCKET__NLMSG_READ },
+ { XFRM_MSG_ALLOCSPI, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
+ { XFRM_MSG_ACQUIRE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
+ { XFRM_MSG_EXPIRE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
+ { XFRM_MSG_UPDPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
+ { XFRM_MSG_UPDSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
+ { XFRM_MSG_POLEXPIRE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
+ { XFRM_MSG_FLUSHSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
+ { XFRM_MSG_FLUSHPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
+ { XFRM_MSG_NEWAE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
+ { XFRM_MSG_GETAE, NETLINK_XFRM_SOCKET__NLMSG_READ },
+ { XFRM_MSG_REPORT, NETLINK_XFRM_SOCKET__NLMSG_READ },
+ { XFRM_MSG_MIGRATE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
+ { XFRM_MSG_NEWSADINFO, NETLINK_XFRM_SOCKET__NLMSG_READ },
+ { XFRM_MSG_GETSADINFO, NETLINK_XFRM_SOCKET__NLMSG_READ },
+ { XFRM_MSG_NEWSPDINFO, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
+ { XFRM_MSG_GETSPDINFO, NETLINK_XFRM_SOCKET__NLMSG_READ },
+ { XFRM_MSG_MAPPING, NETLINK_XFRM_SOCKET__NLMSG_READ },
+ { XFRM_MSG_SETDEFAULT, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
+ { XFRM_MSG_GETDEFAULT, NETLINK_XFRM_SOCKET__NLMSG_READ },
+};
+
+static const struct nlmsg_perm nlmsg_audit_perms[] = {
+ { AUDIT_GET, NETLINK_AUDIT_SOCKET__NLMSG_READ },
+ { AUDIT_SET, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
+ { AUDIT_LIST, NETLINK_AUDIT_SOCKET__NLMSG_READPRIV },
+ { AUDIT_ADD, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
+ { AUDIT_DEL, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
+ { AUDIT_LIST_RULES, NETLINK_AUDIT_SOCKET__NLMSG_READPRIV },
+ { AUDIT_ADD_RULE, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
+ { AUDIT_DEL_RULE, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
+ { AUDIT_USER, NETLINK_AUDIT_SOCKET__NLMSG_RELAY },
+ { AUDIT_SIGNAL_INFO, NETLINK_AUDIT_SOCKET__NLMSG_READ },
+ { AUDIT_TRIM, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
+ { AUDIT_MAKE_EQUIV, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
+ { AUDIT_TTY_GET, NETLINK_AUDIT_SOCKET__NLMSG_READ },
+ { AUDIT_TTY_SET, NETLINK_AUDIT_SOCKET__NLMSG_TTY_AUDIT },
+ { AUDIT_GET_FEATURE, NETLINK_AUDIT_SOCKET__NLMSG_READ },
+ { AUDIT_SET_FEATURE, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
+};
+
+
+static int nlmsg_perm(u16 nlmsg_type, u32 *perm, const struct nlmsg_perm *tab, size_t tabsize)
+{
+ int i, err = -EINVAL;
+
+ for (i = 0; i < tabsize/sizeof(struct nlmsg_perm); i++)
+ if (nlmsg_type == tab[i].nlmsg_type) {
+ *perm = tab[i].perm;
+ err = 0;
+ break;
+ }
+
+ return err;
+}
+
+int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm)
+{
+ int err = 0;
+
+ switch (sclass) {
+ case SECCLASS_NETLINK_ROUTE_SOCKET:
+ /* RTM_MAX always points to RTM_SETxxxx, ie RTM_NEWxxx + 3.
+ * If the BUILD_BUG_ON() below fails you must update the
+ * structures at the top of this file with the new mappings
+ * before updating the BUILD_BUG_ON() macro!
+ */
+ BUILD_BUG_ON(RTM_MAX != (RTM_NEWTUNNEL + 3));
+ err = nlmsg_perm(nlmsg_type, perm, nlmsg_route_perms,
+ sizeof(nlmsg_route_perms));
+ break;
+
+ case SECCLASS_NETLINK_TCPDIAG_SOCKET:
+ err = nlmsg_perm(nlmsg_type, perm, nlmsg_tcpdiag_perms,
+ sizeof(nlmsg_tcpdiag_perms));
+ break;
+
+ case SECCLASS_NETLINK_XFRM_SOCKET:
+ /* If the BUILD_BUG_ON() below fails you must update the
+ * structures at the top of this file with the new mappings
+ * before updating the BUILD_BUG_ON() macro!
+ */
+ BUILD_BUG_ON(XFRM_MSG_MAX != XFRM_MSG_GETDEFAULT);
+ err = nlmsg_perm(nlmsg_type, perm, nlmsg_xfrm_perms,
+ sizeof(nlmsg_xfrm_perms));
+ break;
+
+ case SECCLASS_NETLINK_AUDIT_SOCKET:
+ if ((nlmsg_type >= AUDIT_FIRST_USER_MSG &&
+ nlmsg_type <= AUDIT_LAST_USER_MSG) ||
+ (nlmsg_type >= AUDIT_FIRST_USER_MSG2 &&
+ nlmsg_type <= AUDIT_LAST_USER_MSG2)) {
+ *perm = NETLINK_AUDIT_SOCKET__NLMSG_RELAY;
+ } else {
+ err = nlmsg_perm(nlmsg_type, perm, nlmsg_audit_perms,
+ sizeof(nlmsg_audit_perms));
+ }
+ break;
+
+ /* No messaging from userspace, or class unknown/unhandled */
+ default:
+ err = -ENOENT;
+ break;
+ }
+
+ return err;
+}