| Message ID | 20190626192234.11725-23-casey@schaufler-ca.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | LSM: Module stacking for AppArmor | expand |
On Wed, Jun 26, 2019 at 12:22:33PM -0700, Casey Schaufler wrote: > Netlabel uses LSM interfaces requiring an lsmblob and > the internal storage is used to pass information between > these interfaces, so change the internal data from a secid > to a lsmblob. Update the netlabel interfaces and their > callers to accomodate the change. This requires that the > modules using netlabel use the lsm_id.slot to access the > correct secid when using netlabel. > > Signed-off-by: Casey Schaufler <casey@schaufler-ca.com> Reviewed-by: Kees Cook <keescook@chromium.org> -Kees > --- > include/net/netlabel.h | 8 ++-- > net/ipv4/cipso_ipv4.c | 6 ++- > net/netlabel/netlabel_kapi.c | 6 +-- > net/netlabel/netlabel_unlabeled.c | 57 +++++++++++------------------ > net/netlabel/netlabel_unlabeled.h | 2 +- > security/selinux/hooks.c | 2 +- > security/selinux/include/security.h | 1 + > security/selinux/netlabel.c | 2 +- > security/selinux/ss/services.c | 4 +- > security/smack/smack.h | 1 + > security/smack/smack_lsm.c | 5 ++- > security/smack/smackfs.c | 10 +++-- > 12 files changed, 50 insertions(+), 54 deletions(-) > > diff --git a/include/net/netlabel.h b/include/net/netlabel.h > index 72d6435fc16c..6c550455e69f 100644 > --- a/include/net/netlabel.h > +++ b/include/net/netlabel.h > @@ -180,7 +180,7 @@ struct netlbl_lsm_catmap { > * @attr.mls: MLS sensitivity label > * @attr.mls.cat: MLS category bitmap > * @attr.mls.lvl: MLS sensitivity level > - * @attr.secid: LSM specific secid token > + * @attr.lsmblob: LSM specific data > * > * Description: > * This structure is used to pass security attributes between NetLabel and the > @@ -215,7 +215,7 @@ struct netlbl_lsm_secattr { > struct netlbl_lsm_catmap *cat; > u32 lvl; > } mls; > - u32 secid; > + struct lsmblob lsmblob; > } attr; > }; > > @@ -429,7 +429,7 @@ int netlbl_cfg_unlbl_static_add(struct net *net, > const void *addr, > const void *mask, > u16 family, > - u32 secid, > + struct lsmblob *lsmblob, > struct netlbl_audit *audit_info); > int netlbl_cfg_unlbl_static_del(struct net *net, > const char *dev_name, > @@ -537,7 +537,7 @@ static inline int netlbl_cfg_unlbl_static_add(struct net *net, > const void *addr, > const void *mask, > u16 family, > - u32 secid, > + struct lsmblob *lsmblob, > struct netlbl_audit *audit_info) > { > return -ENOSYS; > diff --git a/net/ipv4/cipso_ipv4.c b/net/ipv4/cipso_ipv4.c > index f0165c5f376b..eb4939f38a14 100644 > --- a/net/ipv4/cipso_ipv4.c > +++ b/net/ipv4/cipso_ipv4.c > @@ -1481,7 +1481,8 @@ static int cipso_v4_gentag_loc(const struct cipso_v4_doi *doi_def, > > buffer[0] = CIPSO_V4_TAG_LOCAL; > buffer[1] = CIPSO_V4_TAG_LOC_BLEN; > - *(u32 *)&buffer[2] = secattr->attr.secid; > + /* only one netlabel user - the first */ > + *(u32 *)&buffer[2] = secattr->attr.lsmblob.secid[0]; > > return CIPSO_V4_TAG_LOC_BLEN; > } > @@ -1501,7 +1502,8 @@ static int cipso_v4_parsetag_loc(const struct cipso_v4_doi *doi_def, > const unsigned char *tag, > struct netlbl_lsm_secattr *secattr) > { > - secattr->attr.secid = *(u32 *)&tag[2]; > + /* only one netlabel user - the first */ > + secattr->attr.lsmblob.secid[0] = *(u32 *)&tag[2]; > secattr->flags |= NETLBL_SECATTR_SECID; > > return 0; > diff --git a/net/netlabel/netlabel_kapi.c b/net/netlabel/netlabel_kapi.c > index ee3e5b6471a6..724d44943543 100644 > --- a/net/netlabel/netlabel_kapi.c > +++ b/net/netlabel/netlabel_kapi.c > @@ -210,7 +210,7 @@ int netlbl_cfg_unlbl_map_add(const char *domain, > * @addr: IP address in network byte order (struct in[6]_addr) > * @mask: address mask in network byte order (struct in[6]_addr) > * @family: address family > - * @secid: LSM secid value for the entry > + * @lsmblob: LSM data value for the entry > * @audit_info: NetLabel audit information > * > * Description: > @@ -224,7 +224,7 @@ int netlbl_cfg_unlbl_static_add(struct net *net, > const void *addr, > const void *mask, > u16 family, > - u32 secid, > + struct lsmblob *lsmblob, > struct netlbl_audit *audit_info) > { > u32 addr_len; > @@ -244,7 +244,7 @@ int netlbl_cfg_unlbl_static_add(struct net *net, > > return netlbl_unlhsh_add(net, > dev_name, addr, mask, addr_len, > - secid, audit_info); > + lsmblob, audit_info); > } > > /** > diff --git a/net/netlabel/netlabel_unlabeled.c b/net/netlabel/netlabel_unlabeled.c > index 4716e0011ba5..57ede7781c8f 100644 > --- a/net/netlabel/netlabel_unlabeled.c > +++ b/net/netlabel/netlabel_unlabeled.c > @@ -80,7 +80,7 @@ struct netlbl_unlhsh_tbl { > #define netlbl_unlhsh_addr4_entry(iter) \ > container_of(iter, struct netlbl_unlhsh_addr4, list) > struct netlbl_unlhsh_addr4 { > - u32 secid; > + struct lsmblob lsmblob; > > struct netlbl_af4list list; > struct rcu_head rcu; > @@ -88,7 +88,7 @@ struct netlbl_unlhsh_addr4 { > #define netlbl_unlhsh_addr6_entry(iter) \ > container_of(iter, struct netlbl_unlhsh_addr6, list) > struct netlbl_unlhsh_addr6 { > - u32 secid; > + struct lsmblob lsmblob; > > struct netlbl_af6list list; > struct rcu_head rcu; > @@ -233,7 +233,7 @@ static struct netlbl_unlhsh_iface *netlbl_unlhsh_search_iface(int ifindex) > * @iface: the associated interface entry > * @addr: IPv4 address in network byte order > * @mask: IPv4 address mask in network byte order > - * @secid: LSM secid value for entry > + * @lsmblob: LSM data value for entry > * > * Description: > * Add a new address entry into the unlabeled connection hash table using the > @@ -244,7 +244,7 @@ static struct netlbl_unlhsh_iface *netlbl_unlhsh_search_iface(int ifindex) > static int netlbl_unlhsh_add_addr4(struct netlbl_unlhsh_iface *iface, > const struct in_addr *addr, > const struct in_addr *mask, > - u32 secid) > + struct lsmblob *lsmblob) > { > int ret_val; > struct netlbl_unlhsh_addr4 *entry; > @@ -256,7 +256,7 @@ static int netlbl_unlhsh_add_addr4(struct netlbl_unlhsh_iface *iface, > entry->list.addr = addr->s_addr & mask->s_addr; > entry->list.mask = mask->s_addr; > entry->list.valid = 1; > - entry->secid = secid; > + entry->lsmblob = *lsmblob; > > spin_lock(&netlbl_unlhsh_lock); > ret_val = netlbl_af4list_add(&entry->list, &iface->addr4_list); > @@ -273,7 +273,7 @@ static int netlbl_unlhsh_add_addr4(struct netlbl_unlhsh_iface *iface, > * @iface: the associated interface entry > * @addr: IPv6 address in network byte order > * @mask: IPv6 address mask in network byte order > - * @secid: LSM secid value for entry > + * @lsmblob: LSM data value for entry > * > * Description: > * Add a new address entry into the unlabeled connection hash table using the > @@ -284,7 +284,7 @@ static int netlbl_unlhsh_add_addr4(struct netlbl_unlhsh_iface *iface, > static int netlbl_unlhsh_add_addr6(struct netlbl_unlhsh_iface *iface, > const struct in6_addr *addr, > const struct in6_addr *mask, > - u32 secid) > + struct lsmblob *lsmblob) > { > int ret_val; > struct netlbl_unlhsh_addr6 *entry; > @@ -300,7 +300,7 @@ static int netlbl_unlhsh_add_addr6(struct netlbl_unlhsh_iface *iface, > entry->list.addr.s6_addr32[3] &= mask->s6_addr32[3]; > entry->list.mask = *mask; > entry->list.valid = 1; > - entry->secid = secid; > + entry->lsmblob = *lsmblob; > > spin_lock(&netlbl_unlhsh_lock); > ret_val = netlbl_af6list_add(&entry->list, &iface->addr6_list); > @@ -379,7 +379,7 @@ int netlbl_unlhsh_add(struct net *net, > const void *addr, > const void *mask, > u32 addr_len, > - u32 secid, > + struct lsmblob *lsmblob, > struct netlbl_audit *audit_info) > { > int ret_val; > @@ -388,7 +388,6 @@ int netlbl_unlhsh_add(struct net *net, > struct netlbl_unlhsh_iface *iface; > struct audit_buffer *audit_buf = NULL; > struct lsmcontext context; > - struct lsmblob blob; > > if (addr_len != sizeof(struct in_addr) && > addr_len != sizeof(struct in6_addr)) > @@ -421,7 +420,7 @@ int netlbl_unlhsh_add(struct net *net, > const struct in_addr *addr4 = addr; > const struct in_addr *mask4 = mask; > > - ret_val = netlbl_unlhsh_add_addr4(iface, addr4, mask4, secid); > + ret_val = netlbl_unlhsh_add_addr4(iface, addr4, mask4, lsmblob); > if (audit_buf != NULL) > netlbl_af4list_audit_addr(audit_buf, 1, > dev_name, > @@ -434,7 +433,7 @@ int netlbl_unlhsh_add(struct net *net, > const struct in6_addr *addr6 = addr; > const struct in6_addr *mask6 = mask; > > - ret_val = netlbl_unlhsh_add_addr6(iface, addr6, mask6, secid); > + ret_val = netlbl_unlhsh_add_addr6(iface, addr6, mask6, lsmblob); > if (audit_buf != NULL) > netlbl_af6list_audit_addr(audit_buf, 1, > dev_name, > @@ -451,8 +450,7 @@ int netlbl_unlhsh_add(struct net *net, > unlhsh_add_return: > rcu_read_unlock(); > if (audit_buf != NULL) { > - lsmblob_init(&blob, secid); > - if (security_secid_to_secctx(&blob, &context) == 0) { > + if (security_secid_to_secctx(lsmblob, &context) == 0) { > audit_log_format(audit_buf, " sec_obj=%s", > context.context); > security_release_secctx(&context); > @@ -487,7 +485,6 @@ static int netlbl_unlhsh_remove_addr4(struct net *net, > struct audit_buffer *audit_buf; > struct net_device *dev; > struct lsmcontext context; > - struct lsmblob blob; > > spin_lock(&netlbl_unlhsh_lock); > list_entry = netlbl_af4list_remove(addr->s_addr, mask->s_addr, > @@ -507,10 +504,8 @@ static int netlbl_unlhsh_remove_addr4(struct net *net, > addr->s_addr, mask->s_addr); > if (dev != NULL) > dev_put(dev); > - if (entry != NULL) > - lsmblob_init(&blob, entry->secid); > if (entry != NULL && > - security_secid_to_secctx(&blob, &context) == 0) { > + security_secid_to_secctx(&entry->lsmblob, &context) == 0) { > audit_log_format(audit_buf, " sec_obj=%s", > context.context); > security_release_secctx(&context); > @@ -551,7 +546,6 @@ static int netlbl_unlhsh_remove_addr6(struct net *net, > struct audit_buffer *audit_buf; > struct net_device *dev; > struct lsmcontext context; > - struct lsmblob blob; > > spin_lock(&netlbl_unlhsh_lock); > list_entry = netlbl_af6list_remove(addr, mask, &iface->addr6_list); > @@ -570,10 +564,8 @@ static int netlbl_unlhsh_remove_addr6(struct net *net, > addr, mask); > if (dev != NULL) > dev_put(dev); > - if (entry != NULL) > - lsmblob_init(&blob, entry->secid); > if (entry != NULL && > - security_secid_to_secctx(&blob, &context) == 0) { > + security_secid_to_secctx(&entry->lsmblob, &context) == 0) { > audit_log_format(audit_buf, " sec_obj=%s", > context.context); > security_release_secctx(&context); > @@ -927,9 +919,8 @@ static int netlbl_unlabel_staticadd(struct sk_buff *skb, > if (ret_val != 0) > return ret_val; > > - /* scaffolding with the [0] */ > return netlbl_unlhsh_add(&init_net, > - dev_name, addr, mask, addr_len, blob.secid[0], > + dev_name, addr, mask, addr_len, &blob, > &audit_info); > } > > @@ -977,10 +968,8 @@ static int netlbl_unlabel_staticadddef(struct sk_buff *skb, > if (ret_val != 0) > return ret_val; > > - /* scaffolding with the [0] */ > return netlbl_unlhsh_add(&init_net, > - NULL, addr, mask, addr_len, blob.secid[0], > - &audit_info); > + NULL, addr, mask, addr_len, &blob, &audit_info); > } > > /** > @@ -1092,8 +1081,7 @@ static int netlbl_unlabel_staticlist_gen(u32 cmd, > struct net_device *dev; > struct lsmcontext context; > void *data; > - u32 secid; > - struct lsmblob blob; > + struct lsmblob *lsmb; > > data = genlmsg_put(cb_arg->skb, NETLINK_CB(cb_arg->nl_cb->skb).portid, > cb_arg->seq, &netlbl_unlabel_gnl_family, > @@ -1131,7 +1119,7 @@ static int netlbl_unlabel_staticlist_gen(u32 cmd, > if (ret_val != 0) > goto list_cb_failure; > > - secid = addr4->secid; > + lsmb = (struct lsmblob *)&addr4->lsmblob; > } else { > ret_val = nla_put_in6_addr(cb_arg->skb, > NLBL_UNLABEL_A_IPV6ADDR, > @@ -1145,11 +1133,10 @@ static int netlbl_unlabel_staticlist_gen(u32 cmd, > if (ret_val != 0) > goto list_cb_failure; > > - secid = addr6->secid; > + lsmb = (struct lsmblob *)&addr6->lsmblob; > } > > - lsmblob_init(&blob, secid); > - ret_val = security_secid_to_secctx(&blob, &context); > + ret_val = security_secid_to_secctx(lsmb, &context); > if (ret_val != 0) > goto list_cb_failure; > ret_val = nla_put(cb_arg->skb, > @@ -1500,7 +1487,7 @@ int netlbl_unlabel_getattr(const struct sk_buff *skb, > &iface->addr4_list); > if (addr4 == NULL) > goto unlabel_getattr_nolabel; > - secattr->attr.secid = netlbl_unlhsh_addr4_entry(addr4)->secid; > + secattr->attr.lsmblob = netlbl_unlhsh_addr4_entry(addr4)->lsmblob; > break; > } > #if IS_ENABLED(CONFIG_IPV6) > @@ -1513,7 +1500,7 @@ int netlbl_unlabel_getattr(const struct sk_buff *skb, > &iface->addr6_list); > if (addr6 == NULL) > goto unlabel_getattr_nolabel; > - secattr->attr.secid = netlbl_unlhsh_addr6_entry(addr6)->secid; > + secattr->attr.lsmblob = netlbl_unlhsh_addr6_entry(addr6)->lsmblob; > break; > } > #endif /* IPv6 */ > diff --git a/net/netlabel/netlabel_unlabeled.h b/net/netlabel/netlabel_unlabeled.h > index 3a9e5dc9511b..dcff99695c97 100644 > --- a/net/netlabel/netlabel_unlabeled.h > +++ b/net/netlabel/netlabel_unlabeled.h > @@ -225,7 +225,7 @@ int netlbl_unlhsh_add(struct net *net, > const void *addr, > const void *mask, > u32 addr_len, > - u32 secid, > + struct lsmblob *lsmblob, > struct netlbl_audit *audit_info); > int netlbl_unlhsh_remove(struct net *net, > const char *dev_name, > diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c > index 8c93b07bb353..d90dfce15d44 100644 > --- a/security/selinux/hooks.c > +++ b/security/selinux/hooks.c > @@ -6622,7 +6622,7 @@ struct lsm_blob_sizes selinux_blob_sizes __lsm_ro_after_init = { > .lbs_superblock = sizeof(struct superblock_security_struct), > }; > > -static struct lsm_id selinux_lsmid = { .lsm="selinux", .slot=LSMBLOB_NEEDED }; > +struct lsm_id selinux_lsmid = { .lsm="selinux", .slot=LSMBLOB_NEEDED }; > > static struct security_hook_list selinux_hooks[] __lsm_ro_after_init = { > LSM_HOOK_INIT(binder_set_context_mgr, selinux_binder_set_context_mgr), > diff --git a/security/selinux/include/security.h b/security/selinux/include/security.h > index b5b7c5aade8c..f0ca3879ba48 100644 > --- a/security/selinux/include/security.h > +++ b/security/selinux/include/security.h > @@ -68,6 +68,7 @@ > struct netlbl_lsm_secattr; > > extern int selinux_enabled; > +extern struct lsm_id selinux_lsmid; > > /* Policy capabilities */ > enum { > diff --git a/security/selinux/netlabel.c b/security/selinux/netlabel.c > index c40914a157b7..120d50c1bcac 100644 > --- a/security/selinux/netlabel.c > +++ b/security/selinux/netlabel.c > @@ -122,7 +122,7 @@ static struct netlbl_lsm_secattr *selinux_netlbl_sock_getattr( > return NULL; > > if ((secattr->flags & NETLBL_SECATTR_SECID) && > - (secattr->attr.secid == sid)) > + (secattr->attr.lsmblob.secid[selinux_lsmid.slot] == sid)) > return secattr; > > return NULL; > diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c > index e3f5d6aece66..4ca0e006c3cc 100644 > --- a/security/selinux/ss/services.c > +++ b/security/selinux/ss/services.c > @@ -3593,7 +3593,7 @@ int security_netlbl_secattr_to_sid(struct selinux_state *state, > if (secattr->flags & NETLBL_SECATTR_CACHE) > *sid = *(u32 *)secattr->cache->data; > else if (secattr->flags & NETLBL_SECATTR_SECID) > - *sid = secattr->attr.secid; > + *sid = secattr->attr.lsmblob.secid[selinux_lsmid.slot]; > else if (secattr->flags & NETLBL_SECATTR_MLS_LVL) { > rc = -EIDRM; > ctx = sidtab_search(sidtab, SECINITSID_NETMSG); > @@ -3666,7 +3666,7 @@ int security_netlbl_sid_to_secattr(struct selinux_state *state, > if (secattr->domain == NULL) > goto out; > > - secattr->attr.secid = sid; > + secattr->attr.lsmblob.secid[selinux_lsmid.slot] = sid; > secattr->flags |= NETLBL_SECATTR_DOMAIN_CPY | NETLBL_SECATTR_SECID; > mls_export_netlbl_lvl(policydb, ctx, secattr); > rc = mls_export_netlbl_cat(policydb, ctx, secattr); > diff --git a/security/smack/smack.h b/security/smack/smack.h > index 7cc3a3382fee..039bf5de56b4 100644 > --- a/security/smack/smack.h > +++ b/security/smack/smack.h > @@ -320,6 +320,7 @@ void smk_destroy_label_list(struct list_head *list); > * Shared data. > */ > extern int smack_enabled; > +extern struct lsm_id smack_lsmid; > extern int smack_cipso_direct; > extern int smack_cipso_mapped; > extern struct smack_known *smack_net_ambient; > diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c > index 3d571c438dfa..a8d56ce00918 100644 > --- a/security/smack/smack_lsm.c > +++ b/security/smack/smack_lsm.c > @@ -3741,7 +3741,8 @@ static struct smack_known *smack_from_secattr(struct netlbl_lsm_secattr *sap, > /* > * Looks like a fallback, which gives us a secid. > */ > - return smack_from_secid(sap->attr.secid); > + return smack_from_secid( > + sap->attr.lsmblob.secid[smack_lsmid.slot]); > /* > * Without guidance regarding the smack value > * for the packet fall back on the network > @@ -4558,7 +4559,7 @@ struct lsm_blob_sizes smack_blob_sizes __lsm_ro_after_init = { > .lbs_superblock = sizeof(struct superblock_smack), > }; > > -static struct lsm_id smack_lsmid = { .lsm="smack", .slot=LSMBLOB_NEEDED }; > +struct lsm_id smack_lsmid = { .lsm="smack", .slot=LSMBLOB_NEEDED }; > > static struct security_hook_list smack_hooks[] __lsm_ro_after_init = { > LSM_HOOK_INIT(ptrace_access_check, smack_ptrace_access_check), > diff --git a/security/smack/smackfs.c b/security/smack/smackfs.c > index faf2ea3968b3..6a4c468c200c 100644 > --- a/security/smack/smackfs.c > +++ b/security/smack/smackfs.c > @@ -1150,6 +1150,7 @@ static void smk_net4addr_insert(struct smk_net4addr *new) > static ssize_t smk_write_net4addr(struct file *file, const char __user *buf, > size_t count, loff_t *ppos) > { > + struct lsmblob lsmblob; > struct smk_net4addr *snp; > struct sockaddr_in newname; > char *smack; > @@ -1281,10 +1282,13 @@ static ssize_t smk_write_net4addr(struct file *file, const char __user *buf, > * this host so that incoming packets get labeled. > * but only if we didn't get the special CIPSO option > */ > - if (rc == 0 && skp != NULL) > + if (rc == 0 && skp != NULL) { > + lsmblob_init(&lsmblob, 0); > + lsmblob.secid[smack_lsmid.slot] = snp->smk_label->smk_secid; > rc = netlbl_cfg_unlbl_static_add(&init_net, NULL, > - &snp->smk_host, &snp->smk_mask, PF_INET, > - snp->smk_label->smk_secid, &audit_info); > + &snp->smk_host, &snp->smk_mask, PF_INET, &lsmblob, > + &audit_info); > + } > > if (rc == 0) > rc = count; > -- > 2.20.1 >
On 6/26/19 12:22 PM, Casey Schaufler wrote: > Netlabel uses LSM interfaces requiring an lsmblob and > the internal storage is used to pass information between > these interfaces, so change the internal data from a secid > to a lsmblob. Update the netlabel interfaces and their > callers to accomodate the change. This requires that the > modules using netlabel use the lsm_id.slot to access the > correct secid when using netlabel. > > Signed-off-by: Casey Schaufler <casey@schaufler-ca.com> Reviewed-by: John Johansen <john.johansen@canonical.com> > --- > include/net/netlabel.h | 8 ++-- > net/ipv4/cipso_ipv4.c | 6 ++- > net/netlabel/netlabel_kapi.c | 6 +-- > net/netlabel/netlabel_unlabeled.c | 57 +++++++++++------------------ > net/netlabel/netlabel_unlabeled.h | 2 +- > security/selinux/hooks.c | 2 +- > security/selinux/include/security.h | 1 + > security/selinux/netlabel.c | 2 +- > security/selinux/ss/services.c | 4 +- > security/smack/smack.h | 1 + > security/smack/smack_lsm.c | 5 ++- > security/smack/smackfs.c | 10 +++-- > 12 files changed, 50 insertions(+), 54 deletions(-) > > diff --git a/include/net/netlabel.h b/include/net/netlabel.h > index 72d6435fc16c..6c550455e69f 100644 > --- a/include/net/netlabel.h > +++ b/include/net/netlabel.h > @@ -180,7 +180,7 @@ struct netlbl_lsm_catmap { > * @attr.mls: MLS sensitivity label > * @attr.mls.cat: MLS category bitmap > * @attr.mls.lvl: MLS sensitivity level > - * @attr.secid: LSM specific secid token > + * @attr.lsmblob: LSM specific data > * > * Description: > * This structure is used to pass security attributes between NetLabel and the > @@ -215,7 +215,7 @@ struct netlbl_lsm_secattr { > struct netlbl_lsm_catmap *cat; > u32 lvl; > } mls; > - u32 secid; > + struct lsmblob lsmblob; > } attr; > }; > > @@ -429,7 +429,7 @@ int netlbl_cfg_unlbl_static_add(struct net *net, > const void *addr, > const void *mask, > u16 family, > - u32 secid, > + struct lsmblob *lsmblob, > struct netlbl_audit *audit_info); > int netlbl_cfg_unlbl_static_del(struct net *net, > const char *dev_name, > @@ -537,7 +537,7 @@ static inline int netlbl_cfg_unlbl_static_add(struct net *net, > const void *addr, > const void *mask, > u16 family, > - u32 secid, > + struct lsmblob *lsmblob, > struct netlbl_audit *audit_info) > { > return -ENOSYS; > diff --git a/net/ipv4/cipso_ipv4.c b/net/ipv4/cipso_ipv4.c > index f0165c5f376b..eb4939f38a14 100644 > --- a/net/ipv4/cipso_ipv4.c > +++ b/net/ipv4/cipso_ipv4.c > @@ -1481,7 +1481,8 @@ static int cipso_v4_gentag_loc(const struct cipso_v4_doi *doi_def, > > buffer[0] = CIPSO_V4_TAG_LOCAL; > buffer[1] = CIPSO_V4_TAG_LOC_BLEN; > - *(u32 *)&buffer[2] = secattr->attr.secid; > + /* only one netlabel user - the first */ > + *(u32 *)&buffer[2] = secattr->attr.lsmblob.secid[0]; > > return CIPSO_V4_TAG_LOC_BLEN; > } > @@ -1501,7 +1502,8 @@ static int cipso_v4_parsetag_loc(const struct cipso_v4_doi *doi_def, > const unsigned char *tag, > struct netlbl_lsm_secattr *secattr) > { > - secattr->attr.secid = *(u32 *)&tag[2]; > + /* only one netlabel user - the first */ > + secattr->attr.lsmblob.secid[0] = *(u32 *)&tag[2]; > secattr->flags |= NETLBL_SECATTR_SECID; > > return 0; > diff --git a/net/netlabel/netlabel_kapi.c b/net/netlabel/netlabel_kapi.c > index ee3e5b6471a6..724d44943543 100644 > --- a/net/netlabel/netlabel_kapi.c > +++ b/net/netlabel/netlabel_kapi.c > @@ -210,7 +210,7 @@ int netlbl_cfg_unlbl_map_add(const char *domain, > * @addr: IP address in network byte order (struct in[6]_addr) > * @mask: address mask in network byte order (struct in[6]_addr) > * @family: address family > - * @secid: LSM secid value for the entry > + * @lsmblob: LSM data value for the entry > * @audit_info: NetLabel audit information > * > * Description: > @@ -224,7 +224,7 @@ int netlbl_cfg_unlbl_static_add(struct net *net, > const void *addr, > const void *mask, > u16 family, > - u32 secid, > + struct lsmblob *lsmblob, > struct netlbl_audit *audit_info) > { > u32 addr_len; > @@ -244,7 +244,7 @@ int netlbl_cfg_unlbl_static_add(struct net *net, > > return netlbl_unlhsh_add(net, > dev_name, addr, mask, addr_len, > - secid, audit_info); > + lsmblob, audit_info); > } > > /** > diff --git a/net/netlabel/netlabel_unlabeled.c b/net/netlabel/netlabel_unlabeled.c > index 4716e0011ba5..57ede7781c8f 100644 > --- a/net/netlabel/netlabel_unlabeled.c > +++ b/net/netlabel/netlabel_unlabeled.c > @@ -80,7 +80,7 @@ struct netlbl_unlhsh_tbl { > #define netlbl_unlhsh_addr4_entry(iter) \ > container_of(iter, struct netlbl_unlhsh_addr4, list) > struct netlbl_unlhsh_addr4 { > - u32 secid; > + struct lsmblob lsmblob; > > struct netlbl_af4list list; > struct rcu_head rcu; > @@ -88,7 +88,7 @@ struct netlbl_unlhsh_addr4 { > #define netlbl_unlhsh_addr6_entry(iter) \ > container_of(iter, struct netlbl_unlhsh_addr6, list) > struct netlbl_unlhsh_addr6 { > - u32 secid; > + struct lsmblob lsmblob; > > struct netlbl_af6list list; > struct rcu_head rcu; > @@ -233,7 +233,7 @@ static struct netlbl_unlhsh_iface *netlbl_unlhsh_search_iface(int ifindex) > * @iface: the associated interface entry > * @addr: IPv4 address in network byte order > * @mask: IPv4 address mask in network byte order > - * @secid: LSM secid value for entry > + * @lsmblob: LSM data value for entry > * > * Description: > * Add a new address entry into the unlabeled connection hash table using the > @@ -244,7 +244,7 @@ static struct netlbl_unlhsh_iface *netlbl_unlhsh_search_iface(int ifindex) > static int netlbl_unlhsh_add_addr4(struct netlbl_unlhsh_iface *iface, > const struct in_addr *addr, > const struct in_addr *mask, > - u32 secid) > + struct lsmblob *lsmblob) > { > int ret_val; > struct netlbl_unlhsh_addr4 *entry; > @@ -256,7 +256,7 @@ static int netlbl_unlhsh_add_addr4(struct netlbl_unlhsh_iface *iface, > entry->list.addr = addr->s_addr & mask->s_addr; > entry->list.mask = mask->s_addr; > entry->list.valid = 1; > - entry->secid = secid; > + entry->lsmblob = *lsmblob; > > spin_lock(&netlbl_unlhsh_lock); > ret_val = netlbl_af4list_add(&entry->list, &iface->addr4_list); > @@ -273,7 +273,7 @@ static int netlbl_unlhsh_add_addr4(struct netlbl_unlhsh_iface *iface, > * @iface: the associated interface entry > * @addr: IPv6 address in network byte order > * @mask: IPv6 address mask in network byte order > - * @secid: LSM secid value for entry > + * @lsmblob: LSM data value for entry > * > * Description: > * Add a new address entry into the unlabeled connection hash table using the > @@ -284,7 +284,7 @@ static int netlbl_unlhsh_add_addr4(struct netlbl_unlhsh_iface *iface, > static int netlbl_unlhsh_add_addr6(struct netlbl_unlhsh_iface *iface, > const struct in6_addr *addr, > const struct in6_addr *mask, > - u32 secid) > + struct lsmblob *lsmblob) > { > int ret_val; > struct netlbl_unlhsh_addr6 *entry; > @@ -300,7 +300,7 @@ static int netlbl_unlhsh_add_addr6(struct netlbl_unlhsh_iface *iface, > entry->list.addr.s6_addr32[3] &= mask->s6_addr32[3]; > entry->list.mask = *mask; > entry->list.valid = 1; > - entry->secid = secid; > + entry->lsmblob = *lsmblob; > > spin_lock(&netlbl_unlhsh_lock); > ret_val = netlbl_af6list_add(&entry->list, &iface->addr6_list); > @@ -379,7 +379,7 @@ int netlbl_unlhsh_add(struct net *net, > const void *addr, > const void *mask, > u32 addr_len, > - u32 secid, > + struct lsmblob *lsmblob, > struct netlbl_audit *audit_info) > { > int ret_val; > @@ -388,7 +388,6 @@ int netlbl_unlhsh_add(struct net *net, > struct netlbl_unlhsh_iface *iface; > struct audit_buffer *audit_buf = NULL; > struct lsmcontext context; > - struct lsmblob blob; > > if (addr_len != sizeof(struct in_addr) && > addr_len != sizeof(struct in6_addr)) > @@ -421,7 +420,7 @@ int netlbl_unlhsh_add(struct net *net, > const struct in_addr *addr4 = addr; > const struct in_addr *mask4 = mask; > > - ret_val = netlbl_unlhsh_add_addr4(iface, addr4, mask4, secid); > + ret_val = netlbl_unlhsh_add_addr4(iface, addr4, mask4, lsmblob); > if (audit_buf != NULL) > netlbl_af4list_audit_addr(audit_buf, 1, > dev_name, > @@ -434,7 +433,7 @@ int netlbl_unlhsh_add(struct net *net, > const struct in6_addr *addr6 = addr; > const struct in6_addr *mask6 = mask; > > - ret_val = netlbl_unlhsh_add_addr6(iface, addr6, mask6, secid); > + ret_val = netlbl_unlhsh_add_addr6(iface, addr6, mask6, lsmblob); > if (audit_buf != NULL) > netlbl_af6list_audit_addr(audit_buf, 1, > dev_name, > @@ -451,8 +450,7 @@ int netlbl_unlhsh_add(struct net *net, > unlhsh_add_return: > rcu_read_unlock(); > if (audit_buf != NULL) { > - lsmblob_init(&blob, secid); > - if (security_secid_to_secctx(&blob, &context) == 0) { > + if (security_secid_to_secctx(lsmblob, &context) == 0) { > audit_log_format(audit_buf, " sec_obj=%s", > context.context); > security_release_secctx(&context); > @@ -487,7 +485,6 @@ static int netlbl_unlhsh_remove_addr4(struct net *net, > struct audit_buffer *audit_buf; > struct net_device *dev; > struct lsmcontext context; > - struct lsmblob blob; > > spin_lock(&netlbl_unlhsh_lock); > list_entry = netlbl_af4list_remove(addr->s_addr, mask->s_addr, > @@ -507,10 +504,8 @@ static int netlbl_unlhsh_remove_addr4(struct net *net, > addr->s_addr, mask->s_addr); > if (dev != NULL) > dev_put(dev); > - if (entry != NULL) > - lsmblob_init(&blob, entry->secid); > if (entry != NULL && > - security_secid_to_secctx(&blob, &context) == 0) { > + security_secid_to_secctx(&entry->lsmblob, &context) == 0) { > audit_log_format(audit_buf, " sec_obj=%s", > context.context); > security_release_secctx(&context); > @@ -551,7 +546,6 @@ static int netlbl_unlhsh_remove_addr6(struct net *net, > struct audit_buffer *audit_buf; > struct net_device *dev; > struct lsmcontext context; > - struct lsmblob blob; > > spin_lock(&netlbl_unlhsh_lock); > list_entry = netlbl_af6list_remove(addr, mask, &iface->addr6_list); > @@ -570,10 +564,8 @@ static int netlbl_unlhsh_remove_addr6(struct net *net, > addr, mask); > if (dev != NULL) > dev_put(dev); > - if (entry != NULL) > - lsmblob_init(&blob, entry->secid); > if (entry != NULL && > - security_secid_to_secctx(&blob, &context) == 0) { > + security_secid_to_secctx(&entry->lsmblob, &context) == 0) { > audit_log_format(audit_buf, " sec_obj=%s", > context.context); > security_release_secctx(&context); > @@ -927,9 +919,8 @@ static int netlbl_unlabel_staticadd(struct sk_buff *skb, > if (ret_val != 0) > return ret_val; > > - /* scaffolding with the [0] */ > return netlbl_unlhsh_add(&init_net, > - dev_name, addr, mask, addr_len, blob.secid[0], > + dev_name, addr, mask, addr_len, &blob, > &audit_info); > } > > @@ -977,10 +968,8 @@ static int netlbl_unlabel_staticadddef(struct sk_buff *skb, > if (ret_val != 0) > return ret_val; > > - /* scaffolding with the [0] */ > return netlbl_unlhsh_add(&init_net, > - NULL, addr, mask, addr_len, blob.secid[0], > - &audit_info); > + NULL, addr, mask, addr_len, &blob, &audit_info); > } > > /** > @@ -1092,8 +1081,7 @@ static int netlbl_unlabel_staticlist_gen(u32 cmd, > struct net_device *dev; > struct lsmcontext context; > void *data; > - u32 secid; > - struct lsmblob blob; > + struct lsmblob *lsmb; > > data = genlmsg_put(cb_arg->skb, NETLINK_CB(cb_arg->nl_cb->skb).portid, > cb_arg->seq, &netlbl_unlabel_gnl_family, > @@ -1131,7 +1119,7 @@ static int netlbl_unlabel_staticlist_gen(u32 cmd, > if (ret_val != 0) > goto list_cb_failure; > > - secid = addr4->secid; > + lsmb = (struct lsmblob *)&addr4->lsmblob; > } else { > ret_val = nla_put_in6_addr(cb_arg->skb, > NLBL_UNLABEL_A_IPV6ADDR, > @@ -1145,11 +1133,10 @@ static int netlbl_unlabel_staticlist_gen(u32 cmd, > if (ret_val != 0) > goto list_cb_failure; > > - secid = addr6->secid; > + lsmb = (struct lsmblob *)&addr6->lsmblob; > } > > - lsmblob_init(&blob, secid); > - ret_val = security_secid_to_secctx(&blob, &context); > + ret_val = security_secid_to_secctx(lsmb, &context); > if (ret_val != 0) > goto list_cb_failure; > ret_val = nla_put(cb_arg->skb, > @@ -1500,7 +1487,7 @@ int netlbl_unlabel_getattr(const struct sk_buff *skb, > &iface->addr4_list); > if (addr4 == NULL) > goto unlabel_getattr_nolabel; > - secattr->attr.secid = netlbl_unlhsh_addr4_entry(addr4)->secid; > + secattr->attr.lsmblob = netlbl_unlhsh_addr4_entry(addr4)->lsmblob; > break; > } > #if IS_ENABLED(CONFIG_IPV6) > @@ -1513,7 +1500,7 @@ int netlbl_unlabel_getattr(const struct sk_buff *skb, > &iface->addr6_list); > if (addr6 == NULL) > goto unlabel_getattr_nolabel; > - secattr->attr.secid = netlbl_unlhsh_addr6_entry(addr6)->secid; > + secattr->attr.lsmblob = netlbl_unlhsh_addr6_entry(addr6)->lsmblob; > break; > } > #endif /* IPv6 */ > diff --git a/net/netlabel/netlabel_unlabeled.h b/net/netlabel/netlabel_unlabeled.h > index 3a9e5dc9511b..dcff99695c97 100644 > --- a/net/netlabel/netlabel_unlabeled.h > +++ b/net/netlabel/netlabel_unlabeled.h > @@ -225,7 +225,7 @@ int netlbl_unlhsh_add(struct net *net, > const void *addr, > const void *mask, > u32 addr_len, > - u32 secid, > + struct lsmblob *lsmblob, > struct netlbl_audit *audit_info); > int netlbl_unlhsh_remove(struct net *net, > const char *dev_name, > diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c > index 8c93b07bb353..d90dfce15d44 100644 > --- a/security/selinux/hooks.c > +++ b/security/selinux/hooks.c > @@ -6622,7 +6622,7 @@ struct lsm_blob_sizes selinux_blob_sizes __lsm_ro_after_init = { > .lbs_superblock = sizeof(struct superblock_security_struct), > }; > > -static struct lsm_id selinux_lsmid = { .lsm="selinux", .slot=LSMBLOB_NEEDED }; > +struct lsm_id selinux_lsmid = { .lsm="selinux", .slot=LSMBLOB_NEEDED }; > > static struct security_hook_list selinux_hooks[] __lsm_ro_after_init = { > LSM_HOOK_INIT(binder_set_context_mgr, selinux_binder_set_context_mgr), > diff --git a/security/selinux/include/security.h b/security/selinux/include/security.h > index b5b7c5aade8c..f0ca3879ba48 100644 > --- a/security/selinux/include/security.h > +++ b/security/selinux/include/security.h > @@ -68,6 +68,7 @@ > struct netlbl_lsm_secattr; > > extern int selinux_enabled; > +extern struct lsm_id selinux_lsmid; > > /* Policy capabilities */ > enum { > diff --git a/security/selinux/netlabel.c b/security/selinux/netlabel.c > index c40914a157b7..120d50c1bcac 100644 > --- a/security/selinux/netlabel.c > +++ b/security/selinux/netlabel.c > @@ -122,7 +122,7 @@ static struct netlbl_lsm_secattr *selinux_netlbl_sock_getattr( > return NULL; > > if ((secattr->flags & NETLBL_SECATTR_SECID) && > - (secattr->attr.secid == sid)) > + (secattr->attr.lsmblob.secid[selinux_lsmid.slot] == sid)) > return secattr; > > return NULL; > diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c > index e3f5d6aece66..4ca0e006c3cc 100644 > --- a/security/selinux/ss/services.c > +++ b/security/selinux/ss/services.c > @@ -3593,7 +3593,7 @@ int security_netlbl_secattr_to_sid(struct selinux_state *state, > if (secattr->flags & NETLBL_SECATTR_CACHE) > *sid = *(u32 *)secattr->cache->data; > else if (secattr->flags & NETLBL_SECATTR_SECID) > - *sid = secattr->attr.secid; > + *sid = secattr->attr.lsmblob.secid[selinux_lsmid.slot]; > else if (secattr->flags & NETLBL_SECATTR_MLS_LVL) { > rc = -EIDRM; > ctx = sidtab_search(sidtab, SECINITSID_NETMSG); > @@ -3666,7 +3666,7 @@ int security_netlbl_sid_to_secattr(struct selinux_state *state, > if (secattr->domain == NULL) > goto out; > > - secattr->attr.secid = sid; > + secattr->attr.lsmblob.secid[selinux_lsmid.slot] = sid; > secattr->flags |= NETLBL_SECATTR_DOMAIN_CPY | NETLBL_SECATTR_SECID; > mls_export_netlbl_lvl(policydb, ctx, secattr); > rc = mls_export_netlbl_cat(policydb, ctx, secattr); > diff --git a/security/smack/smack.h b/security/smack/smack.h > index 7cc3a3382fee..039bf5de56b4 100644 > --- a/security/smack/smack.h > +++ b/security/smack/smack.h > @@ -320,6 +320,7 @@ void smk_destroy_label_list(struct list_head *list); > * Shared data. > */ > extern int smack_enabled; > +extern struct lsm_id smack_lsmid; > extern int smack_cipso_direct; > extern int smack_cipso_mapped; > extern struct smack_known *smack_net_ambient; > diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c > index 3d571c438dfa..a8d56ce00918 100644 > --- a/security/smack/smack_lsm.c > +++ b/security/smack/smack_lsm.c > @@ -3741,7 +3741,8 @@ static struct smack_known *smack_from_secattr(struct netlbl_lsm_secattr *sap, > /* > * Looks like a fallback, which gives us a secid. > */ > - return smack_from_secid(sap->attr.secid); > + return smack_from_secid( > + sap->attr.lsmblob.secid[smack_lsmid.slot]); > /* > * Without guidance regarding the smack value > * for the packet fall back on the network > @@ -4558,7 +4559,7 @@ struct lsm_blob_sizes smack_blob_sizes __lsm_ro_after_init = { > .lbs_superblock = sizeof(struct superblock_smack), > }; > > -static struct lsm_id smack_lsmid = { .lsm="smack", .slot=LSMBLOB_NEEDED }; > +struct lsm_id smack_lsmid = { .lsm="smack", .slot=LSMBLOB_NEEDED }; > > static struct security_hook_list smack_hooks[] __lsm_ro_after_init = { > LSM_HOOK_INIT(ptrace_access_check, smack_ptrace_access_check), > diff --git a/security/smack/smackfs.c b/security/smack/smackfs.c > index faf2ea3968b3..6a4c468c200c 100644 > --- a/security/smack/smackfs.c > +++ b/security/smack/smackfs.c > @@ -1150,6 +1150,7 @@ static void smk_net4addr_insert(struct smk_net4addr *new) > static ssize_t smk_write_net4addr(struct file *file, const char __user *buf, > size_t count, loff_t *ppos) > { > + struct lsmblob lsmblob; > struct smk_net4addr *snp; > struct sockaddr_in newname; > char *smack; > @@ -1281,10 +1282,13 @@ static ssize_t smk_write_net4addr(struct file *file, const char __user *buf, > * this host so that incoming packets get labeled. > * but only if we didn't get the special CIPSO option > */ > - if (rc == 0 && skp != NULL) > + if (rc == 0 && skp != NULL) { > + lsmblob_init(&lsmblob, 0); > + lsmblob.secid[smack_lsmid.slot] = snp->smk_label->smk_secid; > rc = netlbl_cfg_unlbl_static_add(&init_net, NULL, > - &snp->smk_host, &snp->smk_mask, PF_INET, > - snp->smk_label->smk_secid, &audit_info); > + &snp->smk_host, &snp->smk_mask, PF_INET, &lsmblob, > + &audit_info); > + } > > if (rc == 0) > rc = count; >
diff --git a/include/net/netlabel.h b/include/net/netlabel.h index 72d6435fc16c..6c550455e69f 100644 --- a/include/net/netlabel.h +++ b/include/net/netlabel.h @@ -180,7 +180,7 @@ struct netlbl_lsm_catmap { * @attr.mls: MLS sensitivity label * @attr.mls.cat: MLS category bitmap * @attr.mls.lvl: MLS sensitivity level - * @attr.secid: LSM specific secid token + * @attr.lsmblob: LSM specific data * * Description: * This structure is used to pass security attributes between NetLabel and the @@ -215,7 +215,7 @@ struct netlbl_lsm_secattr { struct netlbl_lsm_catmap *cat; u32 lvl; } mls; - u32 secid; + struct lsmblob lsmblob; } attr; }; @@ -429,7 +429,7 @@ int netlbl_cfg_unlbl_static_add(struct net *net, const void *addr, const void *mask, u16 family, - u32 secid, + struct lsmblob *lsmblob, struct netlbl_audit *audit_info); int netlbl_cfg_unlbl_static_del(struct net *net, const char *dev_name, @@ -537,7 +537,7 @@ static inline int netlbl_cfg_unlbl_static_add(struct net *net, const void *addr, const void *mask, u16 family, - u32 secid, + struct lsmblob *lsmblob, struct netlbl_audit *audit_info) { return -ENOSYS; diff --git a/net/ipv4/cipso_ipv4.c b/net/ipv4/cipso_ipv4.c index f0165c5f376b..eb4939f38a14 100644 --- a/net/ipv4/cipso_ipv4.c +++ b/net/ipv4/cipso_ipv4.c @@ -1481,7 +1481,8 @@ static int cipso_v4_gentag_loc(const struct cipso_v4_doi *doi_def, buffer[0] = CIPSO_V4_TAG_LOCAL; buffer[1] = CIPSO_V4_TAG_LOC_BLEN; - *(u32 *)&buffer[2] = secattr->attr.secid; + /* only one netlabel user - the first */ + *(u32 *)&buffer[2] = secattr->attr.lsmblob.secid[0]; return CIPSO_V4_TAG_LOC_BLEN; } @@ -1501,7 +1502,8 @@ static int cipso_v4_parsetag_loc(const struct cipso_v4_doi *doi_def, const unsigned char *tag, struct netlbl_lsm_secattr *secattr) { - secattr->attr.secid = *(u32 *)&tag[2]; + /* only one netlabel user - the first */ + secattr->attr.lsmblob.secid[0] = *(u32 *)&tag[2]; secattr->flags |= NETLBL_SECATTR_SECID; return 0; diff --git a/net/netlabel/netlabel_kapi.c b/net/netlabel/netlabel_kapi.c index ee3e5b6471a6..724d44943543 100644 --- a/net/netlabel/netlabel_kapi.c +++ b/net/netlabel/netlabel_kapi.c @@ -210,7 +210,7 @@ int netlbl_cfg_unlbl_map_add(const char *domain, * @addr: IP address in network byte order (struct in[6]_addr) * @mask: address mask in network byte order (struct in[6]_addr) * @family: address family - * @secid: LSM secid value for the entry + * @lsmblob: LSM data value for the entry * @audit_info: NetLabel audit information * * Description: @@ -224,7 +224,7 @@ int netlbl_cfg_unlbl_static_add(struct net *net, const void *addr, const void *mask, u16 family, - u32 secid, + struct lsmblob *lsmblob, struct netlbl_audit *audit_info) { u32 addr_len; @@ -244,7 +244,7 @@ int netlbl_cfg_unlbl_static_add(struct net *net, return netlbl_unlhsh_add(net, dev_name, addr, mask, addr_len, - secid, audit_info); + lsmblob, audit_info); } /** diff --git a/net/netlabel/netlabel_unlabeled.c b/net/netlabel/netlabel_unlabeled.c index 4716e0011ba5..57ede7781c8f 100644 --- a/net/netlabel/netlabel_unlabeled.c +++ b/net/netlabel/netlabel_unlabeled.c @@ -80,7 +80,7 @@ struct netlbl_unlhsh_tbl { #define netlbl_unlhsh_addr4_entry(iter) \ container_of(iter, struct netlbl_unlhsh_addr4, list) struct netlbl_unlhsh_addr4 { - u32 secid; + struct lsmblob lsmblob; struct netlbl_af4list list; struct rcu_head rcu; @@ -88,7 +88,7 @@ struct netlbl_unlhsh_addr4 { #define netlbl_unlhsh_addr6_entry(iter) \ container_of(iter, struct netlbl_unlhsh_addr6, list) struct netlbl_unlhsh_addr6 { - u32 secid; + struct lsmblob lsmblob; struct netlbl_af6list list; struct rcu_head rcu; @@ -233,7 +233,7 @@ static struct netlbl_unlhsh_iface *netlbl_unlhsh_search_iface(int ifindex) * @iface: the associated interface entry * @addr: IPv4 address in network byte order * @mask: IPv4 address mask in network byte order - * @secid: LSM secid value for entry + * @lsmblob: LSM data value for entry * * Description: * Add a new address entry into the unlabeled connection hash table using the @@ -244,7 +244,7 @@ static struct netlbl_unlhsh_iface *netlbl_unlhsh_search_iface(int ifindex) static int netlbl_unlhsh_add_addr4(struct netlbl_unlhsh_iface *iface, const struct in_addr *addr, const struct in_addr *mask, - u32 secid) + struct lsmblob *lsmblob) { int ret_val; struct netlbl_unlhsh_addr4 *entry; @@ -256,7 +256,7 @@ static int netlbl_unlhsh_add_addr4(struct netlbl_unlhsh_iface *iface, entry->list.addr = addr->s_addr & mask->s_addr; entry->list.mask = mask->s_addr; entry->list.valid = 1; - entry->secid = secid; + entry->lsmblob = *lsmblob; spin_lock(&netlbl_unlhsh_lock); ret_val = netlbl_af4list_add(&entry->list, &iface->addr4_list); @@ -273,7 +273,7 @@ static int netlbl_unlhsh_add_addr4(struct netlbl_unlhsh_iface *iface, * @iface: the associated interface entry * @addr: IPv6 address in network byte order * @mask: IPv6 address mask in network byte order - * @secid: LSM secid value for entry + * @lsmblob: LSM data value for entry * * Description: * Add a new address entry into the unlabeled connection hash table using the @@ -284,7 +284,7 @@ static int netlbl_unlhsh_add_addr4(struct netlbl_unlhsh_iface *iface, static int netlbl_unlhsh_add_addr6(struct netlbl_unlhsh_iface *iface, const struct in6_addr *addr, const struct in6_addr *mask, - u32 secid) + struct lsmblob *lsmblob) { int ret_val; struct netlbl_unlhsh_addr6 *entry; @@ -300,7 +300,7 @@ static int netlbl_unlhsh_add_addr6(struct netlbl_unlhsh_iface *iface, entry->list.addr.s6_addr32[3] &= mask->s6_addr32[3]; entry->list.mask = *mask; entry->list.valid = 1; - entry->secid = secid; + entry->lsmblob = *lsmblob; spin_lock(&netlbl_unlhsh_lock); ret_val = netlbl_af6list_add(&entry->list, &iface->addr6_list); @@ -379,7 +379,7 @@ int netlbl_unlhsh_add(struct net *net, const void *addr, const void *mask, u32 addr_len, - u32 secid, + struct lsmblob *lsmblob, struct netlbl_audit *audit_info) { int ret_val; @@ -388,7 +388,6 @@ int netlbl_unlhsh_add(struct net *net, struct netlbl_unlhsh_iface *iface; struct audit_buffer *audit_buf = NULL; struct lsmcontext context; - struct lsmblob blob; if (addr_len != sizeof(struct in_addr) && addr_len != sizeof(struct in6_addr)) @@ -421,7 +420,7 @@ int netlbl_unlhsh_add(struct net *net, const struct in_addr *addr4 = addr; const struct in_addr *mask4 = mask; - ret_val = netlbl_unlhsh_add_addr4(iface, addr4, mask4, secid); + ret_val = netlbl_unlhsh_add_addr4(iface, addr4, mask4, lsmblob); if (audit_buf != NULL) netlbl_af4list_audit_addr(audit_buf, 1, dev_name, @@ -434,7 +433,7 @@ int netlbl_unlhsh_add(struct net *net, const struct in6_addr *addr6 = addr; const struct in6_addr *mask6 = mask; - ret_val = netlbl_unlhsh_add_addr6(iface, addr6, mask6, secid); + ret_val = netlbl_unlhsh_add_addr6(iface, addr6, mask6, lsmblob); if (audit_buf != NULL) netlbl_af6list_audit_addr(audit_buf, 1, dev_name, @@ -451,8 +450,7 @@ int netlbl_unlhsh_add(struct net *net, unlhsh_add_return: rcu_read_unlock(); if (audit_buf != NULL) { - lsmblob_init(&blob, secid); - if (security_secid_to_secctx(&blob, &context) == 0) { + if (security_secid_to_secctx(lsmblob, &context) == 0) { audit_log_format(audit_buf, " sec_obj=%s", context.context); security_release_secctx(&context); @@ -487,7 +485,6 @@ static int netlbl_unlhsh_remove_addr4(struct net *net, struct audit_buffer *audit_buf; struct net_device *dev; struct lsmcontext context; - struct lsmblob blob; spin_lock(&netlbl_unlhsh_lock); list_entry = netlbl_af4list_remove(addr->s_addr, mask->s_addr, @@ -507,10 +504,8 @@ static int netlbl_unlhsh_remove_addr4(struct net *net, addr->s_addr, mask->s_addr); if (dev != NULL) dev_put(dev); - if (entry != NULL) - lsmblob_init(&blob, entry->secid); if (entry != NULL && - security_secid_to_secctx(&blob, &context) == 0) { + security_secid_to_secctx(&entry->lsmblob, &context) == 0) { audit_log_format(audit_buf, " sec_obj=%s", context.context); security_release_secctx(&context); @@ -551,7 +546,6 @@ static int netlbl_unlhsh_remove_addr6(struct net *net, struct audit_buffer *audit_buf; struct net_device *dev; struct lsmcontext context; - struct lsmblob blob; spin_lock(&netlbl_unlhsh_lock); list_entry = netlbl_af6list_remove(addr, mask, &iface->addr6_list); @@ -570,10 +564,8 @@ static int netlbl_unlhsh_remove_addr6(struct net *net, addr, mask); if (dev != NULL) dev_put(dev); - if (entry != NULL) - lsmblob_init(&blob, entry->secid); if (entry != NULL && - security_secid_to_secctx(&blob, &context) == 0) { + security_secid_to_secctx(&entry->lsmblob, &context) == 0) { audit_log_format(audit_buf, " sec_obj=%s", context.context); security_release_secctx(&context); @@ -927,9 +919,8 @@ static int netlbl_unlabel_staticadd(struct sk_buff *skb, if (ret_val != 0) return ret_val; - /* scaffolding with the [0] */ return netlbl_unlhsh_add(&init_net, - dev_name, addr, mask, addr_len, blob.secid[0], + dev_name, addr, mask, addr_len, &blob, &audit_info); } @@ -977,10 +968,8 @@ static int netlbl_unlabel_staticadddef(struct sk_buff *skb, if (ret_val != 0) return ret_val; - /* scaffolding with the [0] */ return netlbl_unlhsh_add(&init_net, - NULL, addr, mask, addr_len, blob.secid[0], - &audit_info); + NULL, addr, mask, addr_len, &blob, &audit_info); } /** @@ -1092,8 +1081,7 @@ static int netlbl_unlabel_staticlist_gen(u32 cmd, struct net_device *dev; struct lsmcontext context; void *data; - u32 secid; - struct lsmblob blob; + struct lsmblob *lsmb; data = genlmsg_put(cb_arg->skb, NETLINK_CB(cb_arg->nl_cb->skb).portid, cb_arg->seq, &netlbl_unlabel_gnl_family, @@ -1131,7 +1119,7 @@ static int netlbl_unlabel_staticlist_gen(u32 cmd, if (ret_val != 0) goto list_cb_failure; - secid = addr4->secid; + lsmb = (struct lsmblob *)&addr4->lsmblob; } else { ret_val = nla_put_in6_addr(cb_arg->skb, NLBL_UNLABEL_A_IPV6ADDR, @@ -1145,11 +1133,10 @@ static int netlbl_unlabel_staticlist_gen(u32 cmd, if (ret_val != 0) goto list_cb_failure; - secid = addr6->secid; + lsmb = (struct lsmblob *)&addr6->lsmblob; } - lsmblob_init(&blob, secid); - ret_val = security_secid_to_secctx(&blob, &context); + ret_val = security_secid_to_secctx(lsmb, &context); if (ret_val != 0) goto list_cb_failure; ret_val = nla_put(cb_arg->skb, @@ -1500,7 +1487,7 @@ int netlbl_unlabel_getattr(const struct sk_buff *skb, &iface->addr4_list); if (addr4 == NULL) goto unlabel_getattr_nolabel; - secattr->attr.secid = netlbl_unlhsh_addr4_entry(addr4)->secid; + secattr->attr.lsmblob = netlbl_unlhsh_addr4_entry(addr4)->lsmblob; break; } #if IS_ENABLED(CONFIG_IPV6) @@ -1513,7 +1500,7 @@ int netlbl_unlabel_getattr(const struct sk_buff *skb, &iface->addr6_list); if (addr6 == NULL) goto unlabel_getattr_nolabel; - secattr->attr.secid = netlbl_unlhsh_addr6_entry(addr6)->secid; + secattr->attr.lsmblob = netlbl_unlhsh_addr6_entry(addr6)->lsmblob; break; } #endif /* IPv6 */ diff --git a/net/netlabel/netlabel_unlabeled.h b/net/netlabel/netlabel_unlabeled.h index 3a9e5dc9511b..dcff99695c97 100644 --- a/net/netlabel/netlabel_unlabeled.h +++ b/net/netlabel/netlabel_unlabeled.h @@ -225,7 +225,7 @@ int netlbl_unlhsh_add(struct net *net, const void *addr, const void *mask, u32 addr_len, - u32 secid, + struct lsmblob *lsmblob, struct netlbl_audit *audit_info); int netlbl_unlhsh_remove(struct net *net, const char *dev_name, diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index 8c93b07bb353..d90dfce15d44 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -6622,7 +6622,7 @@ struct lsm_blob_sizes selinux_blob_sizes __lsm_ro_after_init = { .lbs_superblock = sizeof(struct superblock_security_struct), }; -static struct lsm_id selinux_lsmid = { .lsm="selinux", .slot=LSMBLOB_NEEDED }; +struct lsm_id selinux_lsmid = { .lsm="selinux", .slot=LSMBLOB_NEEDED }; static struct security_hook_list selinux_hooks[] __lsm_ro_after_init = { LSM_HOOK_INIT(binder_set_context_mgr, selinux_binder_set_context_mgr), diff --git a/security/selinux/include/security.h b/security/selinux/include/security.h index b5b7c5aade8c..f0ca3879ba48 100644 --- a/security/selinux/include/security.h +++ b/security/selinux/include/security.h @@ -68,6 +68,7 @@ struct netlbl_lsm_secattr; extern int selinux_enabled; +extern struct lsm_id selinux_lsmid; /* Policy capabilities */ enum { diff --git a/security/selinux/netlabel.c b/security/selinux/netlabel.c index c40914a157b7..120d50c1bcac 100644 --- a/security/selinux/netlabel.c +++ b/security/selinux/netlabel.c @@ -122,7 +122,7 @@ static struct netlbl_lsm_secattr *selinux_netlbl_sock_getattr( return NULL; if ((secattr->flags & NETLBL_SECATTR_SECID) && - (secattr->attr.secid == sid)) + (secattr->attr.lsmblob.secid[selinux_lsmid.slot] == sid)) return secattr; return NULL; diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c index e3f5d6aece66..4ca0e006c3cc 100644 --- a/security/selinux/ss/services.c +++ b/security/selinux/ss/services.c @@ -3593,7 +3593,7 @@ int security_netlbl_secattr_to_sid(struct selinux_state *state, if (secattr->flags & NETLBL_SECATTR_CACHE) *sid = *(u32 *)secattr->cache->data; else if (secattr->flags & NETLBL_SECATTR_SECID) - *sid = secattr->attr.secid; + *sid = secattr->attr.lsmblob.secid[selinux_lsmid.slot]; else if (secattr->flags & NETLBL_SECATTR_MLS_LVL) { rc = -EIDRM; ctx = sidtab_search(sidtab, SECINITSID_NETMSG); @@ -3666,7 +3666,7 @@ int security_netlbl_sid_to_secattr(struct selinux_state *state, if (secattr->domain == NULL) goto out; - secattr->attr.secid = sid; + secattr->attr.lsmblob.secid[selinux_lsmid.slot] = sid; secattr->flags |= NETLBL_SECATTR_DOMAIN_CPY | NETLBL_SECATTR_SECID; mls_export_netlbl_lvl(policydb, ctx, secattr); rc = mls_export_netlbl_cat(policydb, ctx, secattr); diff --git a/security/smack/smack.h b/security/smack/smack.h index 7cc3a3382fee..039bf5de56b4 100644 --- a/security/smack/smack.h +++ b/security/smack/smack.h @@ -320,6 +320,7 @@ void smk_destroy_label_list(struct list_head *list); * Shared data. */ extern int smack_enabled; +extern struct lsm_id smack_lsmid; extern int smack_cipso_direct; extern int smack_cipso_mapped; extern struct smack_known *smack_net_ambient; diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c index 3d571c438dfa..a8d56ce00918 100644 --- a/security/smack/smack_lsm.c +++ b/security/smack/smack_lsm.c @@ -3741,7 +3741,8 @@ static struct smack_known *smack_from_secattr(struct netlbl_lsm_secattr *sap, /* * Looks like a fallback, which gives us a secid. */ - return smack_from_secid(sap->attr.secid); + return smack_from_secid( + sap->attr.lsmblob.secid[smack_lsmid.slot]); /* * Without guidance regarding the smack value * for the packet fall back on the network @@ -4558,7 +4559,7 @@ struct lsm_blob_sizes smack_blob_sizes __lsm_ro_after_init = { .lbs_superblock = sizeof(struct superblock_smack), }; -static struct lsm_id smack_lsmid = { .lsm="smack", .slot=LSMBLOB_NEEDED }; +struct lsm_id smack_lsmid = { .lsm="smack", .slot=LSMBLOB_NEEDED }; static struct security_hook_list smack_hooks[] __lsm_ro_after_init = { LSM_HOOK_INIT(ptrace_access_check, smack_ptrace_access_check), diff --git a/security/smack/smackfs.c b/security/smack/smackfs.c index faf2ea3968b3..6a4c468c200c 100644 --- a/security/smack/smackfs.c +++ b/security/smack/smackfs.c @@ -1150,6 +1150,7 @@ static void smk_net4addr_insert(struct smk_net4addr *new) static ssize_t smk_write_net4addr(struct file *file, const char __user *buf, size_t count, loff_t *ppos) { + struct lsmblob lsmblob; struct smk_net4addr *snp; struct sockaddr_in newname; char *smack; @@ -1281,10 +1282,13 @@ static ssize_t smk_write_net4addr(struct file *file, const char __user *buf, * this host so that incoming packets get labeled. * but only if we didn't get the special CIPSO option */ - if (rc == 0 && skp != NULL) + if (rc == 0 && skp != NULL) { + lsmblob_init(&lsmblob, 0); + lsmblob.secid[smack_lsmid.slot] = snp->smk_label->smk_secid; rc = netlbl_cfg_unlbl_static_add(&init_net, NULL, - &snp->smk_host, &snp->smk_mask, PF_INET, - snp->smk_label->smk_secid, &audit_info); + &snp->smk_host, &snp->smk_mask, PF_INET, &lsmblob, + &audit_info); + } if (rc == 0) rc = count;
Netlabel uses LSM interfaces requiring an lsmblob and the internal storage is used to pass information between these interfaces, so change the internal data from a secid to a lsmblob. Update the netlabel interfaces and their callers to accomodate the change. This requires that the modules using netlabel use the lsm_id.slot to access the correct secid when using netlabel. Signed-off-by: Casey Schaufler <casey@schaufler-ca.com> --- include/net/netlabel.h | 8 ++-- net/ipv4/cipso_ipv4.c | 6 ++- net/netlabel/netlabel_kapi.c | 6 +-- net/netlabel/netlabel_unlabeled.c | 57 +++++++++++------------------ net/netlabel/netlabel_unlabeled.h | 2 +- security/selinux/hooks.c | 2 +- security/selinux/include/security.h | 1 + security/selinux/netlabel.c | 2 +- security/selinux/ss/services.c | 4 +- security/smack/smack.h | 1 + security/smack/smack_lsm.c | 5 ++- security/smack/smackfs.c | 10 +++-- 12 files changed, 50 insertions(+), 54 deletions(-)