diff --git a/security/selinux/include/classmap.h b/security/selinux/include/classmap.h index 06e836b43ebf..648c07581800 100644 --- a/security/selinux/include/classmap.h +++ b/security/selinux/include/classmap.h @@ -115,7 +115,8 @@ struct security_class_mapping secclass_map[] = { { COMMON_IPC_PERMS, NULL } }, { "netlink_route_socket", { COMMON_SOCK_PERMS, - "nlmsg_read", "nlmsg_write", "nlmsg_readpriv", NULL } }, + "nlmsg_read", "nlmsg_write", "nlmsg_readpriv", "nlmsg_getneigh", + NULL } }, { "netlink_tcpdiag_socket", { COMMON_SOCK_PERMS, "nlmsg_read", "nlmsg_write", NULL } }, diff --git a/security/selinux/include/security.h b/security/selinux/include/security.h index 779f94086c3c..0463c3fa50b4 100644 --- a/security/selinux/include/security.h +++ b/security/selinux/include/security.h @@ -105,6 +105,8 @@ struct selinux_state { bool initialized; bool policycap[__POLICYDB_CAPABILITY_MAX]; bool android_netlink_route; + bool android_netlink_getneigh; + struct selinux_avc *avc; struct selinux_ss *ss; }; @@ -184,6 +186,13 @@ static inline bool selinux_android_nlroute_getlink(void) return state->android_netlink_route; } +static inline bool selinux_android_nlroute_getneigh(void) +{ + struct selinux_state *state = &selinux_state; + + return state->android_netlink_getneigh; +} + int security_mls_enabled(struct selinux_state *state); int security_load_policy(struct selinux_state *state, void *data, size_t len); diff --git a/security/selinux/nlmsgtab.c b/security/selinux/nlmsgtab.c index 5c4299743e9b..74898884832f 100644 --- a/security/selinux/nlmsgtab.c +++ b/security/selinux/nlmsgtab.c @@ -207,12 +207,12 @@ int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm) return err; } -static void nlmsg_set_getlink_perm(u32 perm) +static void nlmsg_set_perm_for_type(u32 perm, u16 type) { int i; for (i = 0; i < ARRAY_SIZE(nlmsg_route_perms); i++) { - if (nlmsg_route_perms[i].nlmsg_type == RTM_GETLINK) { + if (nlmsg_route_perms[i].nlmsg_type == type) { nlmsg_route_perms[i].perm = perm; break; } @@ -222,11 +222,27 @@ static void nlmsg_set_getlink_perm(u32 perm) /** * Use nlmsg_readpriv as the permission for RTM_GETLINK messages if the * netlink_route_getlink policy capability is set. Otherwise use nlmsg_read. + * Similarly, use nlmsg_getneigh for RTM_GETNEIGH and RTM_GETNEIGHTBL if the + * netlink_route_getneigh policy capability is set. Otherwise use nlmsg_read. */ void selinux_nlmsg_init(void) { if (selinux_android_nlroute_getlink()) - nlmsg_set_getlink_perm(NETLINK_ROUTE_SOCKET__NLMSG_READPRIV); + nlmsg_set_perm_for_type(NETLINK_ROUTE_SOCKET__NLMSG_READPRIV, + RTM_GETLINK); else - nlmsg_set_getlink_perm(NETLINK_ROUTE_SOCKET__NLMSG_READ); + nlmsg_set_perm_for_type(NETLINK_ROUTE_SOCKET__NLMSG_READ, + RTM_GETLINK); + + if (selinux_android_nlroute_getneigh()) { + nlmsg_set_perm_for_type(NETLINK_ROUTE_SOCKET__NLMSG_GETNEIGH, + RTM_GETNEIGH); + nlmsg_set_perm_for_type(NETLINK_ROUTE_SOCKET__NLMSG_GETNEIGH, + RTM_GETNEIGHTBL); + } else { + nlmsg_set_perm_for_type(NETLINK_ROUTE_SOCKET__NLMSG_READ, + RTM_GETNEIGH); + nlmsg_set_perm_for_type(NETLINK_ROUTE_SOCKET__NLMSG_READ, + RTM_GETNEIGHTBL); + } } diff --git a/security/selinux/ss/policydb.c b/security/selinux/ss/policydb.c index 9fc103c71cf2..3e68f9339caf 100644 --- a/security/selinux/ss/policydb.c +++ b/security/selinux/ss/policydb.c @@ -2404,6 +2404,10 @@ int policydb_read(struct policydb *p, void *fp) p->android_netlink_route = 1; } + if ((le32_to_cpu(buf[1]) & POLICYDB_CONFIG_ANDROID_NETLINK_GETNEIGH)) { + p->android_netlink_getneigh = 1; + } + if (p->policyvers >= POLICYDB_VERSION_POLCAP) { rc = ebitmap_read(&p->policycaps, fp); if (rc) diff --git a/security/selinux/ss/policydb.h b/security/selinux/ss/policydb.h index dbb0ed57ed8b..9423952faf7b 100644 --- a/security/selinux/ss/policydb.h +++ b/security/selinux/ss/policydb.h @@ -239,6 +239,7 @@ struct genfs { struct policydb { int mls_enabled; int android_netlink_route; + int android_netlink_getneigh; /* symbol tables */ struct symtab symtab[SYM_NUM]; @@ -326,6 +327,7 @@ extern int policydb_write(struct policydb *p, void *fp); #define POLICYDB_CONFIG_MLS 1 #define POLICYDB_CONFIG_ANDROID_NETLINK_ROUTE (1 << 31) +#define POLICYDB_CONFIG_ANDROID_NETLINK_GETNEIGH (1 << 30) /* the config flags related to unknown classes/perms are bits 2 and 3 */ #define REJECT_UNKNOWN 0x00000002 diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c index 2279dc77d96b..683cbde7e3f0 100644 --- a/security/selinux/ss/services.c +++ b/security/selinux/ss/services.c @@ -2109,6 +2109,7 @@ static void security_load_policycaps(struct selinux_state *state) } state->android_netlink_route = p->android_netlink_route; + state->android_netlink_getneigh = p->android_netlink_getneigh; selinux_nlmsg_init(); }