| Message ID | 20190618230551.7475-10-casey@schaufler-ca.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | LSM: Module stacking for AppArmor | expand |
On Tue, Jun 18, 2019 at 04:05:35PM -0700, Casey Schaufler wrote: > Change security_secid_to_secctx() to take a lsmblob as input > instead of a u32 secid. It will then call the LSM hooks > using the lsmblob element allocated for that module. The > callers have been updated as well. This allows for the > possibility that more than one module may called upon > to translate a secid to a string, as can occur in the > audit code. Cool. The progression of scaffolding here is pretty clear to me. -Kees > > Signed-off-by: Casey Schaufler <casey@schaufler-ca.com> > --- > drivers/android/binder.c | 4 +++- > include/linux/security.h | 5 +++-- > include/net/scm.h | 4 +--- > kernel/audit.c | 9 +++++++-- > kernel/auditsc.c | 13 +++++++++---- > net/ipv4/ip_sockglue.c | 3 +-- > net/netfilter/nf_conntrack_netlink.c | 8 ++++++-- > net/netfilter/nf_conntrack_standalone.c | 4 +++- > net/netfilter/nfnetlink_queue.c | 8 ++++++-- > net/netlabel/netlabel_unlabeled.c | 18 ++++++++++++++---- > net/netlabel/netlabel_user.c | 6 +++--- > security/security.c | 14 +++++++++++--- > 12 files changed, 67 insertions(+), 29 deletions(-) > > diff --git a/drivers/android/binder.c b/drivers/android/binder.c > index 8685882da64c..a3204fbc1f28 100644 > --- a/drivers/android/binder.c > +++ b/drivers/android/binder.c > @@ -3120,9 +3120,11 @@ static void binder_transaction(struct binder_proc *proc, > > if (target_node && target_node->txn_security_ctx) { > u32 secid; > + struct lsmblob le; > > security_task_getsecid(proc->tsk, &secid); > - ret = security_secid_to_secctx(secid, &secctx, &secctx_sz); > + lsmblob_init(&le, secid); > + ret = security_secid_to_secctx(&le, &secctx, &secctx_sz); > if (ret) { > return_error = BR_FAILED_REPLY; > return_error_param = ret; > diff --git a/include/linux/security.h b/include/linux/security.h > index dcaaa63b79b3..c9ed83e57a97 100644 > --- a/include/linux/security.h > +++ b/include/linux/security.h > @@ -442,7 +442,7 @@ int security_setprocattr(const char *lsm, const char *name, void *value, > size_t size); > int security_netlink_send(struct sock *sk, struct sk_buff *skb); > int security_ismaclabel(const char *name); > -int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen); > +int security_secid_to_secctx(struct lsmblob *l, char **secdata, u32 *seclen); > int security_secctx_to_secid(const char *secdata, u32 seclen, > struct lsmblob *l); > void security_release_secctx(char *secdata, u32 seclen); > @@ -1220,7 +1220,8 @@ static inline int security_ismaclabel(const char *name) > return 0; > } > > -static inline int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen) > +static inline int security_secid_to_secctx(struct lsmblob *l, > + char **secdata, u32 *seclen) > { > return -EOPNOTSUPP; > } > diff --git a/include/net/scm.h b/include/net/scm.h > index c87a17101c86..bcb0f8560cdf 100644 > --- a/include/net/scm.h > +++ b/include/net/scm.h > @@ -97,9 +97,7 @@ static inline void scm_passec(struct socket *sock, struct msghdr *msg, struct sc > int err; > > if (test_bit(SOCK_PASSSEC, &sock->flags)) { > - /* Scaffolding - it has to be element 1 for now */ > - err = security_secid_to_secctx(scm->lsmblob.secid[1], > - &secdata, &seclen); > + err = security_secid_to_secctx(&scm->lsmblob, &secdata, &seclen); > > if (!err) { > put_cmsg(msg, SOL_SOCKET, SCM_SECURITY, seclen, secdata); > diff --git a/kernel/audit.c b/kernel/audit.c > index c89ea48c70a6..5efd78ced915 100644 > --- a/kernel/audit.c > +++ b/kernel/audit.c > @@ -1430,7 +1430,10 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh) > case AUDIT_SIGNAL_INFO: > len = 0; > if (audit_sig_sid) { > - err = security_secid_to_secctx(audit_sig_sid, &ctx, &len); > + struct lsmblob le; > + > + lsmblob_init(&le, audit_sig_sid); > + err = security_secid_to_secctx(&le, &ctx, &len); > if (err) > return err; > } > @@ -2073,12 +2076,14 @@ int audit_log_task_context(struct audit_buffer *ab) > unsigned len; > int error; > u32 sid; > + struct lsmblob le; > > security_task_getsecid(current, &sid); > if (!sid) > return 0; > > - error = security_secid_to_secctx(sid, &ctx, &len); > + lsmblob_init(&le, sid); > + error = security_secid_to_secctx(&le, &ctx, &len); > if (error) { > if (error != -EINVAL) > goto error_path; > diff --git a/kernel/auditsc.c b/kernel/auditsc.c > index 93c74205ef40..67d3f71a095a 100644 > --- a/kernel/auditsc.c > +++ b/kernel/auditsc.c > @@ -946,6 +946,7 @@ static int audit_log_pid_context(struct audit_context *context, pid_t pid, > char *ctx = NULL; > u32 len; > int rc = 0; > + struct lsmblob le; > > ab = audit_log_start(context, GFP_KERNEL, AUDIT_OBJ_PID); > if (!ab) > @@ -955,7 +956,8 @@ static int audit_log_pid_context(struct audit_context *context, pid_t pid, > from_kuid(&init_user_ns, auid), > from_kuid(&init_user_ns, uid), sessionid); > if (sid) { > - if (security_secid_to_secctx(sid, &ctx, &len)) { > + lsmblob_init(&le, sid); > + if (security_secid_to_secctx(&le, &ctx, &len)) { > audit_log_format(ab, " obj=(none)"); > rc = 1; > } else { > @@ -1197,7 +1199,9 @@ static void show_special(struct audit_context *context, int *call_panic) > if (osid) { > char *ctx = NULL; > u32 len; > - if (security_secid_to_secctx(osid, &ctx, &len)) { > + struct lsmblob le; > + lsmblob_init(&le, osid); > + if (security_secid_to_secctx(&le, &ctx, &len)) { > audit_log_format(ab, " osid=%u", osid); > *call_panic = 1; > } else { > @@ -1348,9 +1352,10 @@ static void audit_log_name(struct audit_context *context, struct audit_names *n, > if (n->osid != 0) { > char *ctx = NULL; > u32 len; > + struct lsmblob le; > > - if (security_secid_to_secctx( > - n->osid, &ctx, &len)) { > + lsmblob_init(&le, n->osid); > + if (security_secid_to_secctx(&le, &ctx, &len)) { > audit_log_format(ab, " osid=%u", n->osid); > if (call_panic) > *call_panic = 2; > diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c > index fbe2147ee595..e05f4ef68bd8 100644 > --- a/net/ipv4/ip_sockglue.c > +++ b/net/ipv4/ip_sockglue.c > @@ -139,8 +139,7 @@ static void ip_cmsg_recv_security(struct msghdr *msg, struct sk_buff *skb) > if (err) > return; > > - /* Scaffolding - it has to be element 1 */ > - err = security_secid_to_secctx(lb.secid[1], &secdata, &seclen); > + err = security_secid_to_secctx(&lb, &secdata, &seclen); > if (err) > return; > > diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c > index 66c596d287a5..6098b586da07 100644 > --- a/net/netfilter/nf_conntrack_netlink.c > +++ b/net/netfilter/nf_conntrack_netlink.c > @@ -330,8 +330,10 @@ static int ctnetlink_dump_secctx(struct sk_buff *skb, const struct nf_conn *ct) > struct nlattr *nest_secctx; > int len, ret; > char *secctx; > + struct lsmblob le; > > - ret = security_secid_to_secctx(ct->secmark, &secctx, &len); > + lsmblob_init(&le, ct->secmark); > + ret = security_secid_to_secctx(&le, &secctx, &len); > if (ret) > return 0; > > @@ -615,8 +617,10 @@ static inline int ctnetlink_secctx_size(const struct nf_conn *ct) > { > #ifdef CONFIG_NF_CONNTRACK_SECMARK > int len, ret; > + struct lsmblob le; > > - ret = security_secid_to_secctx(ct->secmark, NULL, &len); > + lsmblob_init(&le, ct->secmark); > + ret = security_secid_to_secctx(&le, NULL, &len); > if (ret) > return 0; > > diff --git a/net/netfilter/nf_conntrack_standalone.c b/net/netfilter/nf_conntrack_standalone.c > index c2ae14c720b4..6e6fb1f9f6ba 100644 > --- a/net/netfilter/nf_conntrack_standalone.c > +++ b/net/netfilter/nf_conntrack_standalone.c > @@ -175,8 +175,10 @@ static void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct) > int ret; > u32 len; > char *secctx; > + struct lsmblob le; > > - ret = security_secid_to_secctx(ct->secmark, &secctx, &len); > + lsmblob_init(&le, ct->secmark); > + ret = security_secid_to_secctx(&le, &secctx, &len); > if (ret) > return; > > diff --git a/net/netfilter/nfnetlink_queue.c b/net/netfilter/nfnetlink_queue.c > index 0dcc3592d053..105018d19318 100644 > --- a/net/netfilter/nfnetlink_queue.c > +++ b/net/netfilter/nfnetlink_queue.c > @@ -309,13 +309,17 @@ static u32 nfqnl_get_sk_secctx(struct sk_buff *skb, char **secdata) > { > u32 seclen = 0; > #if IS_ENABLED(CONFIG_NETWORK_SECMARK) > + struct lsmblob le; > + > if (!skb || !sk_fullsock(skb->sk)) > return 0; > > read_lock_bh(&skb->sk->sk_callback_lock); > > - if (skb->secmark) > - security_secid_to_secctx(skb->secmark, secdata, &seclen); > + if (skb->secmark) { > + lsmblob_init(&le, skb->secmark); > + security_secid_to_secctx(&le, secdata, &seclen); > + } > > read_unlock_bh(&skb->sk->sk_callback_lock); > #endif > diff --git a/net/netlabel/netlabel_unlabeled.c b/net/netlabel/netlabel_unlabeled.c > index 30873e671d05..46ac9721e261 100644 > --- a/net/netlabel/netlabel_unlabeled.c > +++ b/net/netlabel/netlabel_unlabeled.c > @@ -389,6 +389,7 @@ int netlbl_unlhsh_add(struct net *net, > struct audit_buffer *audit_buf = NULL; > char *secctx = NULL; > u32 secctx_len; > + struct lsmblob le; > > if (addr_len != sizeof(struct in_addr) && > addr_len != sizeof(struct in6_addr)) > @@ -451,7 +452,8 @@ int netlbl_unlhsh_add(struct net *net, > unlhsh_add_return: > rcu_read_unlock(); > if (audit_buf != NULL) { > - if (security_secid_to_secctx(secid, > + lsmblob_init(&le, secid); > + if (security_secid_to_secctx(&le, > &secctx, > &secctx_len) == 0) { > audit_log_format(audit_buf, " sec_obj=%s", secctx); > @@ -488,6 +490,7 @@ static int netlbl_unlhsh_remove_addr4(struct net *net, > struct net_device *dev; > char *secctx; > u32 secctx_len; > + struct lsmblob le; > > spin_lock(&netlbl_unlhsh_lock); > list_entry = netlbl_af4list_remove(addr->s_addr, mask->s_addr, > @@ -507,8 +510,10 @@ 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(&le, entry->secid); > if (entry != NULL && > - security_secid_to_secctx(entry->secid, > + security_secid_to_secctx(&le, > &secctx, &secctx_len) == 0) { > audit_log_format(audit_buf, " sec_obj=%s", secctx); > security_release_secctx(secctx, secctx_len); > @@ -550,6 +555,7 @@ static int netlbl_unlhsh_remove_addr6(struct net *net, > struct net_device *dev; > char *secctx; > u32 secctx_len; > + struct lsmblob le; > > spin_lock(&netlbl_unlhsh_lock); > list_entry = netlbl_af6list_remove(addr, mask, &iface->addr6_list); > @@ -568,8 +574,10 @@ static int netlbl_unlhsh_remove_addr6(struct net *net, > addr, mask); > if (dev != NULL) > dev_put(dev); > + if (entry != NULL) > + lsmblob_init(&le, entry->secid); > if (entry != NULL && > - security_secid_to_secctx(entry->secid, > + security_secid_to_secctx(&le, > &secctx, &secctx_len) == 0) { > audit_log_format(audit_buf, " sec_obj=%s", secctx); > security_release_secctx(secctx, secctx_len); > @@ -1090,6 +1098,7 @@ static int netlbl_unlabel_staticlist_gen(u32 cmd, > u32 secid; > char *secctx; > u32 secctx_len; > + struct lsmblob le; > > data = genlmsg_put(cb_arg->skb, NETLINK_CB(cb_arg->nl_cb->skb).portid, > cb_arg->seq, &netlbl_unlabel_gnl_family, > @@ -1144,7 +1153,8 @@ static int netlbl_unlabel_staticlist_gen(u32 cmd, > secid = addr6->secid; > } > > - ret_val = security_secid_to_secctx(secid, &secctx, &secctx_len); > + lsmblob_init(&le, secid); > + ret_val = security_secid_to_secctx(&le, &secctx, &secctx_len); > if (ret_val != 0) > goto list_cb_failure; > ret_val = nla_put(cb_arg->skb, > diff --git a/net/netlabel/netlabel_user.c b/net/netlabel/netlabel_user.c > index 4676f5bb16ae..4145adf55a22 100644 > --- a/net/netlabel/netlabel_user.c > +++ b/net/netlabel/netlabel_user.c > @@ -100,6 +100,7 @@ struct audit_buffer *netlbl_audit_start_common(int type, > struct audit_buffer *audit_buf; > char *secctx; > u32 secctx_len; > + struct lsmblob le; > > if (audit_enabled == AUDIT_OFF) > return NULL; > @@ -112,10 +113,9 @@ struct audit_buffer *netlbl_audit_start_common(int type, > from_kuid(&init_user_ns, audit_info->loginuid), > audit_info->sessionid); > > + lsmblob_init(&le, audit_info->secid); > if (audit_info->secid != 0 && > - security_secid_to_secctx(audit_info->secid, > - &secctx, > - &secctx_len) == 0) { > + security_secid_to_secctx(&le, &secctx, &secctx_len) == 0) { > audit_log_format(audit_buf, " subj=%s", secctx); > security_release_secctx(secctx, secctx_len); > } > diff --git a/security/security.c b/security/security.c > index 44927bf13d32..561a41eccbd9 100644 > --- a/security/security.c > +++ b/security/security.c > @@ -1987,10 +1987,18 @@ int security_ismaclabel(const char *name) > } > EXPORT_SYMBOL(security_ismaclabel); > > -int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen) > +int security_secid_to_secctx(struct lsmblob *l, char **secdata, u32 *seclen) > { > - return call_int_hook(secid_to_secctx, -EOPNOTSUPP, secid, secdata, > - seclen); > + struct security_hook_list *hp; > + int rc; > + > + hlist_for_each_entry(hp, &security_hook_heads.secid_to_secctx, list) { > + rc = hp->hook.secid_to_secctx(l->secid[hp->slot], > + secdata, seclen); > + if (rc != 0) > + return rc; > + } > + return 0; > } > EXPORT_SYMBOL(security_secid_to_secctx); > > -- > 2.20.1 >
diff --git a/drivers/android/binder.c b/drivers/android/binder.c index 8685882da64c..a3204fbc1f28 100644 --- a/drivers/android/binder.c +++ b/drivers/android/binder.c @@ -3120,9 +3120,11 @@ static void binder_transaction(struct binder_proc *proc, if (target_node && target_node->txn_security_ctx) { u32 secid; + struct lsmblob le; security_task_getsecid(proc->tsk, &secid); - ret = security_secid_to_secctx(secid, &secctx, &secctx_sz); + lsmblob_init(&le, secid); + ret = security_secid_to_secctx(&le, &secctx, &secctx_sz); if (ret) { return_error = BR_FAILED_REPLY; return_error_param = ret; diff --git a/include/linux/security.h b/include/linux/security.h index dcaaa63b79b3..c9ed83e57a97 100644 --- a/include/linux/security.h +++ b/include/linux/security.h @@ -442,7 +442,7 @@ int security_setprocattr(const char *lsm, const char *name, void *value, size_t size); int security_netlink_send(struct sock *sk, struct sk_buff *skb); int security_ismaclabel(const char *name); -int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen); +int security_secid_to_secctx(struct lsmblob *l, char **secdata, u32 *seclen); int security_secctx_to_secid(const char *secdata, u32 seclen, struct lsmblob *l); void security_release_secctx(char *secdata, u32 seclen); @@ -1220,7 +1220,8 @@ static inline int security_ismaclabel(const char *name) return 0; } -static inline int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen) +static inline int security_secid_to_secctx(struct lsmblob *l, + char **secdata, u32 *seclen) { return -EOPNOTSUPP; } diff --git a/include/net/scm.h b/include/net/scm.h index c87a17101c86..bcb0f8560cdf 100644 --- a/include/net/scm.h +++ b/include/net/scm.h @@ -97,9 +97,7 @@ static inline void scm_passec(struct socket *sock, struct msghdr *msg, struct sc int err; if (test_bit(SOCK_PASSSEC, &sock->flags)) { - /* Scaffolding - it has to be element 1 for now */ - err = security_secid_to_secctx(scm->lsmblob.secid[1], - &secdata, &seclen); + err = security_secid_to_secctx(&scm->lsmblob, &secdata, &seclen); if (!err) { put_cmsg(msg, SOL_SOCKET, SCM_SECURITY, seclen, secdata); diff --git a/kernel/audit.c b/kernel/audit.c index c89ea48c70a6..5efd78ced915 100644 --- a/kernel/audit.c +++ b/kernel/audit.c @@ -1430,7 +1430,10 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh) case AUDIT_SIGNAL_INFO: len = 0; if (audit_sig_sid) { - err = security_secid_to_secctx(audit_sig_sid, &ctx, &len); + struct lsmblob le; + + lsmblob_init(&le, audit_sig_sid); + err = security_secid_to_secctx(&le, &ctx, &len); if (err) return err; } @@ -2073,12 +2076,14 @@ int audit_log_task_context(struct audit_buffer *ab) unsigned len; int error; u32 sid; + struct lsmblob le; security_task_getsecid(current, &sid); if (!sid) return 0; - error = security_secid_to_secctx(sid, &ctx, &len); + lsmblob_init(&le, sid); + error = security_secid_to_secctx(&le, &ctx, &len); if (error) { if (error != -EINVAL) goto error_path; diff --git a/kernel/auditsc.c b/kernel/auditsc.c index 93c74205ef40..67d3f71a095a 100644 --- a/kernel/auditsc.c +++ b/kernel/auditsc.c @@ -946,6 +946,7 @@ static int audit_log_pid_context(struct audit_context *context, pid_t pid, char *ctx = NULL; u32 len; int rc = 0; + struct lsmblob le; ab = audit_log_start(context, GFP_KERNEL, AUDIT_OBJ_PID); if (!ab) @@ -955,7 +956,8 @@ static int audit_log_pid_context(struct audit_context *context, pid_t pid, from_kuid(&init_user_ns, auid), from_kuid(&init_user_ns, uid), sessionid); if (sid) { - if (security_secid_to_secctx(sid, &ctx, &len)) { + lsmblob_init(&le, sid); + if (security_secid_to_secctx(&le, &ctx, &len)) { audit_log_format(ab, " obj=(none)"); rc = 1; } else { @@ -1197,7 +1199,9 @@ static void show_special(struct audit_context *context, int *call_panic) if (osid) { char *ctx = NULL; u32 len; - if (security_secid_to_secctx(osid, &ctx, &len)) { + struct lsmblob le; + lsmblob_init(&le, osid); + if (security_secid_to_secctx(&le, &ctx, &len)) { audit_log_format(ab, " osid=%u", osid); *call_panic = 1; } else { @@ -1348,9 +1352,10 @@ static void audit_log_name(struct audit_context *context, struct audit_names *n, if (n->osid != 0) { char *ctx = NULL; u32 len; + struct lsmblob le; - if (security_secid_to_secctx( - n->osid, &ctx, &len)) { + lsmblob_init(&le, n->osid); + if (security_secid_to_secctx(&le, &ctx, &len)) { audit_log_format(ab, " osid=%u", n->osid); if (call_panic) *call_panic = 2; diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c index fbe2147ee595..e05f4ef68bd8 100644 --- a/net/ipv4/ip_sockglue.c +++ b/net/ipv4/ip_sockglue.c @@ -139,8 +139,7 @@ static void ip_cmsg_recv_security(struct msghdr *msg, struct sk_buff *skb) if (err) return; - /* Scaffolding - it has to be element 1 */ - err = security_secid_to_secctx(lb.secid[1], &secdata, &seclen); + err = security_secid_to_secctx(&lb, &secdata, &seclen); if (err) return; diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c index 66c596d287a5..6098b586da07 100644 --- a/net/netfilter/nf_conntrack_netlink.c +++ b/net/netfilter/nf_conntrack_netlink.c @@ -330,8 +330,10 @@ static int ctnetlink_dump_secctx(struct sk_buff *skb, const struct nf_conn *ct) struct nlattr *nest_secctx; int len, ret; char *secctx; + struct lsmblob le; - ret = security_secid_to_secctx(ct->secmark, &secctx, &len); + lsmblob_init(&le, ct->secmark); + ret = security_secid_to_secctx(&le, &secctx, &len); if (ret) return 0; @@ -615,8 +617,10 @@ static inline int ctnetlink_secctx_size(const struct nf_conn *ct) { #ifdef CONFIG_NF_CONNTRACK_SECMARK int len, ret; + struct lsmblob le; - ret = security_secid_to_secctx(ct->secmark, NULL, &len); + lsmblob_init(&le, ct->secmark); + ret = security_secid_to_secctx(&le, NULL, &len); if (ret) return 0; diff --git a/net/netfilter/nf_conntrack_standalone.c b/net/netfilter/nf_conntrack_standalone.c index c2ae14c720b4..6e6fb1f9f6ba 100644 --- a/net/netfilter/nf_conntrack_standalone.c +++ b/net/netfilter/nf_conntrack_standalone.c @@ -175,8 +175,10 @@ static void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct) int ret; u32 len; char *secctx; + struct lsmblob le; - ret = security_secid_to_secctx(ct->secmark, &secctx, &len); + lsmblob_init(&le, ct->secmark); + ret = security_secid_to_secctx(&le, &secctx, &len); if (ret) return; diff --git a/net/netfilter/nfnetlink_queue.c b/net/netfilter/nfnetlink_queue.c index 0dcc3592d053..105018d19318 100644 --- a/net/netfilter/nfnetlink_queue.c +++ b/net/netfilter/nfnetlink_queue.c @@ -309,13 +309,17 @@ static u32 nfqnl_get_sk_secctx(struct sk_buff *skb, char **secdata) { u32 seclen = 0; #if IS_ENABLED(CONFIG_NETWORK_SECMARK) + struct lsmblob le; + if (!skb || !sk_fullsock(skb->sk)) return 0; read_lock_bh(&skb->sk->sk_callback_lock); - if (skb->secmark) - security_secid_to_secctx(skb->secmark, secdata, &seclen); + if (skb->secmark) { + lsmblob_init(&le, skb->secmark); + security_secid_to_secctx(&le, secdata, &seclen); + } read_unlock_bh(&skb->sk->sk_callback_lock); #endif diff --git a/net/netlabel/netlabel_unlabeled.c b/net/netlabel/netlabel_unlabeled.c index 30873e671d05..46ac9721e261 100644 --- a/net/netlabel/netlabel_unlabeled.c +++ b/net/netlabel/netlabel_unlabeled.c @@ -389,6 +389,7 @@ int netlbl_unlhsh_add(struct net *net, struct audit_buffer *audit_buf = NULL; char *secctx = NULL; u32 secctx_len; + struct lsmblob le; if (addr_len != sizeof(struct in_addr) && addr_len != sizeof(struct in6_addr)) @@ -451,7 +452,8 @@ int netlbl_unlhsh_add(struct net *net, unlhsh_add_return: rcu_read_unlock(); if (audit_buf != NULL) { - if (security_secid_to_secctx(secid, + lsmblob_init(&le, secid); + if (security_secid_to_secctx(&le, &secctx, &secctx_len) == 0) { audit_log_format(audit_buf, " sec_obj=%s", secctx); @@ -488,6 +490,7 @@ static int netlbl_unlhsh_remove_addr4(struct net *net, struct net_device *dev; char *secctx; u32 secctx_len; + struct lsmblob le; spin_lock(&netlbl_unlhsh_lock); list_entry = netlbl_af4list_remove(addr->s_addr, mask->s_addr, @@ -507,8 +510,10 @@ 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(&le, entry->secid); if (entry != NULL && - security_secid_to_secctx(entry->secid, + security_secid_to_secctx(&le, &secctx, &secctx_len) == 0) { audit_log_format(audit_buf, " sec_obj=%s", secctx); security_release_secctx(secctx, secctx_len); @@ -550,6 +555,7 @@ static int netlbl_unlhsh_remove_addr6(struct net *net, struct net_device *dev; char *secctx; u32 secctx_len; + struct lsmblob le; spin_lock(&netlbl_unlhsh_lock); list_entry = netlbl_af6list_remove(addr, mask, &iface->addr6_list); @@ -568,8 +574,10 @@ static int netlbl_unlhsh_remove_addr6(struct net *net, addr, mask); if (dev != NULL) dev_put(dev); + if (entry != NULL) + lsmblob_init(&le, entry->secid); if (entry != NULL && - security_secid_to_secctx(entry->secid, + security_secid_to_secctx(&le, &secctx, &secctx_len) == 0) { audit_log_format(audit_buf, " sec_obj=%s", secctx); security_release_secctx(secctx, secctx_len); @@ -1090,6 +1098,7 @@ static int netlbl_unlabel_staticlist_gen(u32 cmd, u32 secid; char *secctx; u32 secctx_len; + struct lsmblob le; data = genlmsg_put(cb_arg->skb, NETLINK_CB(cb_arg->nl_cb->skb).portid, cb_arg->seq, &netlbl_unlabel_gnl_family, @@ -1144,7 +1153,8 @@ static int netlbl_unlabel_staticlist_gen(u32 cmd, secid = addr6->secid; } - ret_val = security_secid_to_secctx(secid, &secctx, &secctx_len); + lsmblob_init(&le, secid); + ret_val = security_secid_to_secctx(&le, &secctx, &secctx_len); if (ret_val != 0) goto list_cb_failure; ret_val = nla_put(cb_arg->skb, diff --git a/net/netlabel/netlabel_user.c b/net/netlabel/netlabel_user.c index 4676f5bb16ae..4145adf55a22 100644 --- a/net/netlabel/netlabel_user.c +++ b/net/netlabel/netlabel_user.c @@ -100,6 +100,7 @@ struct audit_buffer *netlbl_audit_start_common(int type, struct audit_buffer *audit_buf; char *secctx; u32 secctx_len; + struct lsmblob le; if (audit_enabled == AUDIT_OFF) return NULL; @@ -112,10 +113,9 @@ struct audit_buffer *netlbl_audit_start_common(int type, from_kuid(&init_user_ns, audit_info->loginuid), audit_info->sessionid); + lsmblob_init(&le, audit_info->secid); if (audit_info->secid != 0 && - security_secid_to_secctx(audit_info->secid, - &secctx, - &secctx_len) == 0) { + security_secid_to_secctx(&le, &secctx, &secctx_len) == 0) { audit_log_format(audit_buf, " subj=%s", secctx); security_release_secctx(secctx, secctx_len); } diff --git a/security/security.c b/security/security.c index 44927bf13d32..561a41eccbd9 100644 --- a/security/security.c +++ b/security/security.c @@ -1987,10 +1987,18 @@ int security_ismaclabel(const char *name) } EXPORT_SYMBOL(security_ismaclabel); -int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen) +int security_secid_to_secctx(struct lsmblob *l, char **secdata, u32 *seclen) { - return call_int_hook(secid_to_secctx, -EOPNOTSUPP, secid, secdata, - seclen); + struct security_hook_list *hp; + int rc; + + hlist_for_each_entry(hp, &security_hook_heads.secid_to_secctx, list) { + rc = hp->hook.secid_to_secctx(l->secid[hp->slot], + secdata, seclen); + if (rc != 0) + return rc; + } + return 0; } EXPORT_SYMBOL(security_secid_to_secctx);
Change security_secid_to_secctx() to take a lsmblob as input instead of a u32 secid. It will then call the LSM hooks using the lsmblob element allocated for that module. The callers have been updated as well. This allows for the possibility that more than one module may called upon to translate a secid to a string, as can occur in the audit code. Signed-off-by: Casey Schaufler <casey@schaufler-ca.com> --- drivers/android/binder.c | 4 +++- include/linux/security.h | 5 +++-- include/net/scm.h | 4 +--- kernel/audit.c | 9 +++++++-- kernel/auditsc.c | 13 +++++++++---- net/ipv4/ip_sockglue.c | 3 +-- net/netfilter/nf_conntrack_netlink.c | 8 ++++++-- net/netfilter/nf_conntrack_standalone.c | 4 +++- net/netfilter/nfnetlink_queue.c | 8 ++++++-- net/netlabel/netlabel_unlabeled.c | 18 ++++++++++++++---- net/netlabel/netlabel_user.c | 6 +++--- security/security.c | 14 +++++++++++--- 12 files changed, 67 insertions(+), 29 deletions(-)