--- v12
+++ v24
@@ -1,140 +1,643 @@
-Change the security_dentry_init_security() interface to
-fill an lsmcontext structure instead of a void * data area
-and a length. The lone caller of this interface is NFS4,
-which may make copies of the data using its own mechanisms.
-A rework of the nfs4 code to use the lsmcontext properly
-is a significant project, so the coward's way out is taken,
-and the lsmcontext data from security_dentry_init_security()
-is copied, then released directly.
-
-This interface does not use the "display". There is currently
-not case where that is useful or reasonable.
+Replace the (secctx,seclen) pointer pair with a single
+lsmcontext pointer to allow return of the LSM identifier
+along with the context and context length. This allows
+security_release_secctx() to know how to release the
+context. Callers have been modified to use or save the
+returned data from the new structure.
Reviewed-by: Kees Cook <keescook@chromium.org>
-Reviewed-by: John Johansen <john.johansen@canonical.com>
+Acked-by: Stephen Smalley <sds@tycho.nsa.gov>
+Acked-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
+Cc: netdev@vger.kernel.org
+Cc: linux-audit@redhat.com
+Cc: netfilter-devel@vger.kernel.org
---
- fs/nfs/nfs4proc.c | 26 ++++++++++++++++----------
- include/linux/security.h | 7 +++----
- security/security.c | 29 +++++++++++++++++++++++++----
- 3 files changed, 44 insertions(+), 18 deletions(-)
+ drivers/android/binder.c | 26 +++++++---------
+ include/linux/security.h | 4 +--
+ include/net/scm.h | 9 ++----
+ kernel/audit.c | 39 +++++++++++-------------
+ kernel/auditsc.c | 31 +++++++------------
+ net/ipv4/ip_sockglue.c | 8 ++---
+ net/netfilter/nf_conntrack_netlink.c | 18 +++++------
+ net/netfilter/nf_conntrack_standalone.c | 7 ++---
+ net/netfilter/nfnetlink_queue.c | 5 +++-
+ net/netlabel/netlabel_unlabeled.c | 40 ++++++++-----------------
+ net/netlabel/netlabel_user.c | 7 ++---
+ security/security.c | 10 +++++--
+ 12 files changed, 81 insertions(+), 123 deletions(-)
-diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
-index a30e36654c57..78d63f7f0088 100644
---- a/fs/nfs/nfs4proc.c
-+++ b/fs/nfs/nfs4proc.c
-@@ -112,6 +112,7 @@ static inline struct nfs4_label *
- nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
- struct iattr *sattr, struct nfs4_label *label)
- {
+diff --git a/drivers/android/binder.c b/drivers/android/binder.c
+index f74a72867ec9..4c810ea52ab7 100644
+--- a/drivers/android/binder.c
++++ b/drivers/android/binder.c
+@@ -2446,9 +2446,7 @@ static void binder_transaction(struct binder_proc *proc,
+ binder_size_t last_fixup_min_off = 0;
+ struct binder_context *context = proc->context;
+ int t_debug_id = atomic_inc_return(&binder_last_id);
+- char *secctx = NULL;
+- u32 secctx_sz = 0;
+- struct lsmcontext scaff; /* scaffolding */
++ struct lsmcontext lsmctx = { };
+
+ e = binder_transaction_log_add(&binder_transaction_log);
+ e->debug_id = t_debug_id;
+@@ -2702,14 +2700,14 @@ static void binder_transaction(struct binder_proc *proc,
+ size_t added_size;
+
+ security_task_getsecid(proc->tsk, &blob);
+- ret = security_secid_to_secctx(&blob, &secctx, &secctx_sz);
++ ret = security_secid_to_secctx(&blob, &lsmctx);
+ if (ret) {
+ return_error = BR_FAILED_REPLY;
+ return_error_param = ret;
+ return_error_line = __LINE__;
+ goto err_get_secctx_failed;
+ }
+- added_size = ALIGN(secctx_sz, sizeof(u64));
++ added_size = ALIGN(lsmctx.len, sizeof(u64));
+ extra_buffers_size += added_size;
+ if (extra_buffers_size < added_size) {
+ /* integer overflow of extra_buffers_size */
+@@ -2736,24 +2734,22 @@ static void binder_transaction(struct binder_proc *proc,
+ t->buffer = NULL;
+ goto err_binder_alloc_buf_failed;
+ }
+- if (secctx) {
++ if (lsmctx.context) {
+ int err;
+ size_t buf_offset = ALIGN(tr->data_size, sizeof(void *)) +
+ ALIGN(tr->offsets_size, sizeof(void *)) +
+ ALIGN(extra_buffers_size, sizeof(void *)) -
+- ALIGN(secctx_sz, sizeof(u64));
++ ALIGN(lsmctx.len, sizeof(u64));
+
+ t->security_ctx = (uintptr_t)t->buffer->user_data + buf_offset;
+ err = binder_alloc_copy_to_buffer(&target_proc->alloc,
+ t->buffer, buf_offset,
+- secctx, secctx_sz);
++ lsmctx.context, lsmctx.len);
+ if (err) {
+ t->security_ctx = 0;
+ WARN_ON(1);
+ }
+- lsmcontext_init(&scaff, secctx, secctx_sz, 0);
+- security_release_secctx(&scaff);
+- secctx = NULL;
++ security_release_secctx(&lsmctx);
+ }
+ t->buffer->debug_id = t->debug_id;
+ t->buffer->transaction = t;
+@@ -2810,7 +2806,7 @@ static void binder_transaction(struct binder_proc *proc,
+ off_end_offset = off_start_offset + tr->offsets_size;
+ sg_buf_offset = ALIGN(off_end_offset, sizeof(void *));
+ sg_buf_end_offset = sg_buf_offset + extra_buffers_size -
+- ALIGN(secctx_sz, sizeof(u64));
++ ALIGN(lsmctx.len, sizeof(u64));
+ off_min = 0;
+ for (buffer_offset = off_start_offset; buffer_offset < off_end_offset;
+ buffer_offset += sizeof(binder_size_t)) {
+@@ -3086,10 +3082,8 @@ static void binder_transaction(struct binder_proc *proc,
+ binder_alloc_free_buf(&target_proc->alloc, t->buffer);
+ err_binder_alloc_buf_failed:
+ err_bad_extra_size:
+- if (secctx) {
+- lsmcontext_init(&scaff, secctx, secctx_sz, 0);
+- security_release_secctx(&scaff);
+- }
++ if (lsmctx.context)
++ security_release_secctx(&lsmctx);
+ err_get_secctx_failed:
+ kfree(tcomplete);
+ binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE);
+diff --git a/include/linux/security.h b/include/linux/security.h
+index cfa19eb9533b..ead44674cea2 100644
+--- a/include/linux/security.h
++++ b/include/linux/security.h
+@@ -564,7 +564,7 @@ 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(struct lsmblob *blob, char **secdata, u32 *seclen);
++int security_secid_to_secctx(struct lsmblob *blob, struct lsmcontext *cp);
+ int security_secctx_to_secid(const char *secdata, u32 seclen,
+ struct lsmblob *blob);
+ void security_release_secctx(struct lsmcontext *cp);
+@@ -1390,7 +1390,7 @@ static inline int security_ismaclabel(const char *name)
+ }
+
+ static inline int security_secid_to_secctx(struct lsmblob *blob,
+- char **secdata, u32 *seclen)
++ struct lsmcontext *cp)
+ {
+ return -EOPNOTSUPP;
+ }
+diff --git a/include/net/scm.h b/include/net/scm.h
+index f273c4d777ec..b77a52f93389 100644
+--- a/include/net/scm.h
++++ b/include/net/scm.h
+@@ -94,8 +94,6 @@ static inline void scm_passec(struct socket *sock, struct msghdr *msg, struct sc
+ {
+ struct lsmcontext context;
+ struct lsmblob lb;
+- char *secdata;
+- u32 seclen;
+ int err;
+
+ if (test_bit(SOCK_PASSSEC, &sock->flags)) {
+@@ -103,12 +101,11 @@ static inline void scm_passec(struct socket *sock, struct msghdr *msg, struct sc
+ * and the infrastructure will know which it is.
+ */
+ lsmblob_init(&lb, scm->secid);
+- err = security_secid_to_secctx(&lb, &secdata, &seclen);
++ err = security_secid_to_secctx(&lb, &context);
+
+ if (!err) {
+- put_cmsg(msg, SOL_SOCKET, SCM_SECURITY, seclen, secdata);
+- /*scaffolding*/
+- lsmcontext_init(&context, secdata, seclen, 0);
++ put_cmsg(msg, SOL_SOCKET, SCM_SECURITY, context.len,
++ context.context);
+ security_release_secctx(&context);
+ }
+ }
+diff --git a/kernel/audit.c b/kernel/audit.c
+index 902962ea9be6..ce90ea8373d3 100644
+--- a/kernel/audit.c
++++ b/kernel/audit.c
+@@ -1190,9 +1190,6 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
+ struct audit_buffer *ab;
+ u16 msg_type = nlh->nlmsg_type;
+ struct audit_sig_info *sig_data;
+- char *ctx = NULL;
+- u32 len;
+- struct lsmcontext scaff; /* scaffolding */
+
+ err = audit_netlink_ok(skb, msg_type);
+ if (err)
+@@ -1440,33 +1437,34 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
+ kfree(new);
+ break;
+ }
+- case AUDIT_SIGNAL_INFO:
+- len = 0;
++ case AUDIT_SIGNAL_INFO: {
++ struct lsmcontext context = { };
++ int len = 0;
++
+ if (lsmblob_is_set(&audit_sig_lsm)) {
+- err = security_secid_to_secctx(&audit_sig_lsm, &ctx,
+- &len);
++ err = security_secid_to_secctx(&audit_sig_lsm,
++ &context);
+ if (err)
+ return err;
+ }
+- sig_data = kmalloc(sizeof(*sig_data) + len, GFP_KERNEL);
++ sig_data = kmalloc(sizeof(*sig_data) + context.len, GFP_KERNEL);
+ if (!sig_data) {
+- if (lsmblob_is_set(&audit_sig_lsm)) {
+- lsmcontext_init(&scaff, ctx, len, 0);
+- security_release_secctx(&scaff);
+- }
++ if (lsmblob_is_set(&audit_sig_lsm))
++ security_release_secctx(&context);
+ return -ENOMEM;
+ }
+ sig_data->uid = from_kuid(&init_user_ns, audit_sig_uid);
+ sig_data->pid = audit_sig_pid;
+ if (lsmblob_is_set(&audit_sig_lsm)) {
+- memcpy(sig_data->ctx, ctx, len);
+- lsmcontext_init(&scaff, ctx, len, 0);
+- security_release_secctx(&scaff);
++ len = context.len;
++ memcpy(sig_data->ctx, context.context, len);
++ security_release_secctx(&context);
+ }
+ audit_send_reply(skb, seq, AUDIT_SIGNAL_INFO, 0, 0,
+ sig_data, sizeof(*sig_data) + len);
+ kfree(sig_data);
+ break;
++ }
+ case AUDIT_TTY_GET: {
+ struct audit_tty_status s;
+ unsigned int t;
+@@ -2132,26 +2130,23 @@ void audit_log_key(struct audit_buffer *ab, char *key)
+
+ int audit_log_task_context(struct audit_buffer *ab)
+ {
+- char *ctx = NULL;
+- unsigned len;
+ int error;
+ struct lsmblob blob;
+- struct lsmcontext scaff; /* scaffolding */
+ struct lsmcontext context;
+
+ security_task_getsecid(current, &blob);
+ if (!lsmblob_is_set(&blob))
+ return 0;
+
+- error = security_secid_to_secctx(&blob, &ctx, &len);
++ error = security_secid_to_secctx(&blob, &context);
+ if (error) {
+ if (error != -EINVAL)
+ goto error_path;
+ return 0;
+ }
+
+- audit_log_format(ab, " subj=%s", ctx);
+- lsmcontext_init(&scaff, ctx, len, 0);
+- security_release_secctx(&scaff);
++ audit_log_format(ab, " subj=%s", context.context);
++ security_release_secctx(&context);
+ return 0;
+
+ error_path:
+diff --git a/kernel/auditsc.c b/kernel/auditsc.c
+index a73253515bc9..de2b2ecb3aea 100644
+--- a/kernel/auditsc.c
++++ b/kernel/auditsc.c
+@@ -998,9 +998,7 @@ static int audit_log_pid_context(struct audit_context *context, pid_t pid,
+ struct lsmblob *blob, char *comm)
+ {
+ struct audit_buffer *ab;
+- struct lsmcontext lsmcxt;
+- char *ctx = NULL;
+- u32 len;
++ struct lsmcontext lsmctx;
+ int rc = 0;
+
+ ab = audit_log_start(context, GFP_KERNEL, AUDIT_OBJ_PID);
+@@ -1011,13 +1009,12 @@ 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 (lsmblob_is_set(blob)) {
+- if (security_secid_to_secctx(blob, &ctx, &len)) {
++ if (security_secid_to_secctx(blob, &lsmctx)) {
+ audit_log_format(ab, " obj=(none)");
+ rc = 1;
+ } else {
+- audit_log_format(ab, " obj=%s", ctx);
+- lsmcontext_init(&lsmcxt, ctx, len, 0); /*scaffolding*/
+- security_release_secctx(&lsmcxt);
++ audit_log_format(ab, " obj=%s", lsmctx.context);
++ security_release_secctx(&lsmctx);
+ }
+ }
+ audit_log_format(ab, " ocomm=");
+@@ -1230,7 +1227,6 @@ static void audit_log_fcaps(struct audit_buffer *ab, struct audit_names *name)
+
+ static void show_special(struct audit_context *context, int *call_panic)
+ {
+- struct lsmcontext lsmcxt;
+ struct audit_buffer *ab;
+ int i;
+
+@@ -1254,17 +1250,15 @@ static void show_special(struct audit_context *context, int *call_panic)
+ from_kgid(&init_user_ns, context->ipc.gid),
+ context->ipc.mode);
+ if (osid) {
+- char *ctx = NULL;
+- u32 len;
++ struct lsmcontext lsmcxt;
+ struct lsmblob blob;
+
+ lsmblob_init(&blob, osid);
+- if (security_secid_to_secctx(&blob, &ctx, &len)) {
++ if (security_secid_to_secctx(&blob, &lsmcxt)) {
+ audit_log_format(ab, " osid=%u", osid);
+ *call_panic = 1;
+ } else {
+- audit_log_format(ab, " obj=%s", ctx);
+- lsmcontext_init(&lsmcxt, ctx, len, 0);
++ audit_log_format(ab, " obj=%s", lsmcxt.context);
+ security_release_secctx(&lsmcxt);
+ }
+ }
+@@ -1411,20 +1405,17 @@ static void audit_log_name(struct audit_context *context, struct audit_names *n,
+ MAJOR(n->rdev),
+ MINOR(n->rdev));
+ if (n->osid != 0) {
+- char *ctx = NULL;
+- u32 len;
+ struct lsmblob blob;
+- struct lsmcontext lsmcxt;
++ struct lsmcontext lsmctx;
+
+ lsmblob_init(&blob, n->osid);
+- if (security_secid_to_secctx(&blob, &ctx, &len)) {
++ if (security_secid_to_secctx(&blob, &lsmctx)) {
+ audit_log_format(ab, " osid=%u", n->osid);
+ if (call_panic)
+ *call_panic = 2;
+ } else {
+- audit_log_format(ab, " obj=%s", ctx);
+- lsmcontext_init(&lsmcxt, ctx, len, 0); /* scaffolding */
+- security_release_secctx(&lsmcxt);
++ audit_log_format(ab, " obj=%s", lsmctx.context);
++ security_release_secctx(&lsmctx);
+ }
+ }
+
+diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c
+index a7e4c1b34b6c..ae073b642fa7 100644
+--- a/net/ipv4/ip_sockglue.c
++++ b/net/ipv4/ip_sockglue.c
+@@ -132,8 +132,7 @@ static void ip_cmsg_recv_security(struct msghdr *msg, struct sk_buff *skb)
+ {
+ struct lsmcontext context;
+ struct lsmblob lb;
+- char *secdata;
+- u32 seclen, secid;
++ u32 secid;
int err;
- if (label == NULL)
-@@ -121,21 +122,26 @@ nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
- return NULL;
-
- err = security_dentry_init_security(dentry, sattr->ia_mode,
-- &dentry->d_name, (void **)&label->label, &label->len);
-- if (err == 0)
-- return label;
-+ &dentry->d_name, &context);
-+
-+ if (err)
-+ return NULL;
-+
-+ label->label = kmemdup(context.context, context.len, GFP_KERNEL);
-+ if (label->label == NULL)
-+ label = NULL;
-+ else
-+ label->len = context.len;
-+
+ err = security_socket_getpeersec_dgram(NULL, skb, &secid);
+@@ -141,12 +140,11 @@ static void ip_cmsg_recv_security(struct msghdr *msg, struct sk_buff *skb)
+ return;
+
+ lsmblob_init(&lb, secid);
+- err = security_secid_to_secctx(&lb, &secdata, &seclen);
++ err = security_secid_to_secctx(&lb, &context);
+ if (err)
+ return;
+
+- put_cmsg(msg, SOL_IP, SCM_SECURITY, seclen, secdata);
+- lsmcontext_init(&context, secdata, seclen, 0); /* scaffolding */
++ put_cmsg(msg, SOL_IP, SCM_SECURITY, context.len, context.context);
+ security_release_secctx(&context);
+ }
+
+diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c
+index 3b9cf2a1fed7..42570b8da17a 100644
+--- a/net/netfilter/nf_conntrack_netlink.c
++++ b/net/netfilter/nf_conntrack_netlink.c
+@@ -336,8 +336,7 @@ static int ctnetlink_dump_mark(struct sk_buff *skb, const struct nf_conn *ct)
+ static int ctnetlink_dump_secctx(struct sk_buff *skb, const struct nf_conn *ct)
+ {
+ struct nlattr *nest_secctx;
+- int len, ret;
+- char *secctx;
++ int ret;
+ struct lsmblob blob;
+ struct lsmcontext context;
+
+@@ -345,7 +344,7 @@ static int ctnetlink_dump_secctx(struct sk_buff *skb, const struct nf_conn *ct)
+ * security_secid_to_secctx() will know which security module
+ * to use to create the secctx. */
+ lsmblob_init(&blob, ct->secmark);
+- ret = security_secid_to_secctx(&blob, &secctx, &len);
++ ret = security_secid_to_secctx(&blob, &context);
+ if (ret)
+ return 0;
+
+@@ -354,13 +353,12 @@ static int ctnetlink_dump_secctx(struct sk_buff *skb, const struct nf_conn *ct)
+ if (!nest_secctx)
+ goto nla_put_failure;
+
+- if (nla_put_string(skb, CTA_SECCTX_NAME, secctx))
++ if (nla_put_string(skb, CTA_SECCTX_NAME, context.context))
+ goto nla_put_failure;
+ nla_nest_end(skb, nest_secctx);
+
+ ret = 0;
+ nla_put_failure:
+- lsmcontext_init(&context, secctx, len, 0); /* scaffolding */
+ security_release_secctx(&context);
+ return ret;
+ }
+@@ -660,15 +658,15 @@ static inline int ctnetlink_secctx_size(const struct nf_conn *ct)
+ #ifdef CONFIG_NF_CONNTRACK_SECMARK
+ int len, ret;
+ struct lsmblob blob;
++ struct lsmcontext context;
+
+- /* lsmblob_init() puts ct->secmark into all of the secids in blob.
+- * security_secid_to_secctx() will know which security module
+- * to use to create the secctx. */
+- lsmblob_init(&blob, ct->secmark);
+- ret = security_secid_to_secctx(&blob, NULL, &len);
++ ret = security_secid_to_secctx(&blob, &context);
+ if (ret)
+ return 0;
+
++ len = context.len;
+ security_release_secctx(&context);
+
-+ return label;
-
-- return NULL;
+ return nla_total_size(0) /* CTA_SECCTX */
+ + nla_total_size(sizeof(char) * len); /* CTA_SECCTX_NAME */
+ #else
+diff --git a/net/netfilter/nf_conntrack_standalone.c b/net/netfilter/nf_conntrack_standalone.c
+index e2bdc851a477..c6112960fc73 100644
+--- a/net/netfilter/nf_conntrack_standalone.c
++++ b/net/netfilter/nf_conntrack_standalone.c
+@@ -173,19 +173,16 @@ static void ct_seq_stop(struct seq_file *s, void *v)
+ static void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct)
+ {
+ int ret;
+- u32 len;
+- char *secctx;
+ struct lsmblob blob;
+ struct lsmcontext context;
+
+ lsmblob_init(&blob, ct->secmark);
+- ret = security_secid_to_secctx(&blob, &secctx, &len);
++ ret = security_secid_to_secctx(&blob, &context);
+ if (ret)
+ return;
+
+- seq_printf(s, "secctx=%s ", secctx);
++ seq_printf(s, "secctx=%s ", context.context);
+
+- lsmcontext_init(&context, secctx, len, 0); /* scaffolding */
+ security_release_secctx(&context);
}
- static inline void
- nfs4_label_release_security(struct nfs4_label *label)
- {
-- struct lsmcontext scaff; /* scaffolding */
--
-- if (label) {
-- lsmcontext_init(&scaff, label->label, label->len, 0);
-- security_release_secctx(&scaff);
-- }
-+ kfree(label->label);
+ #else
+diff --git a/net/netfilter/nfnetlink_queue.c b/net/netfilter/nfnetlink_queue.c
+index dcc31cb7f287..84be5a49a157 100644
+--- a/net/netfilter/nfnetlink_queue.c
++++ b/net/netfilter/nfnetlink_queue.c
+@@ -306,6 +306,7 @@ static u32 nfqnl_get_sk_secctx(struct sk_buff *skb, char **secdata)
+ u32 seclen = 0;
+ #if IS_ENABLED(CONFIG_NETWORK_SECMARK)
+ struct lsmblob blob;
++ struct lsmcontext context = { };
+
+ if (!skb || !sk_fullsock(skb->sk))
+ return 0;
+@@ -317,10 +318,12 @@ static u32 nfqnl_get_sk_secctx(struct sk_buff *skb, char **secdata)
+ * blob. security_secid_to_secctx() will know which security
+ * module to use to create the secctx. */
+ lsmblob_init(&blob, skb->secmark);
+- security_secid_to_secctx(&blob, secdata, &seclen);
++ security_secid_to_secctx(&blob, &context);
++ *secdata = context.context;
+ }
+
+ read_unlock_bh(&skb->sk->sk_callback_lock);
++ seclen = context.len;
+ #endif
+ return seclen;
}
- static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
- {
-diff --git a/include/linux/security.h b/include/linux/security.h
-index 00421941f683..a5eba06a9382 100644
---- a/include/linux/security.h
-+++ b/include/linux/security.h
-@@ -398,8 +398,8 @@ int security_add_mnt_opt(const char *option, const char *val,
- int len, void **mnt_opts);
- int security_move_mount(const struct path *from_path, const struct path *to_path);
- int security_dentry_init_security(struct dentry *dentry, int mode,
-- const struct qstr *name, void **ctx,
-- u32 *ctxlen);
-+ const struct qstr *name,
-+ struct lsmcontext *ctx);
- int security_dentry_create_files_as(struct dentry *dentry, int mode,
- struct qstr *name,
- const struct cred *old,
-@@ -790,8 +790,7 @@ static inline void security_inode_free(struct inode *inode)
- static inline int security_dentry_init_security(struct dentry *dentry,
- int mode,
- const struct qstr *name,
-- void **ctx,
-- u32 *ctxlen)
-+ struct lsmcontext *ctx)
- {
- return -EOPNOTSUPP;
- }
+diff --git a/net/netlabel/netlabel_unlabeled.c b/net/netlabel/netlabel_unlabeled.c
+index 32b6eea7ba0c..aa53a94115f4 100644
+--- a/net/netlabel/netlabel_unlabeled.c
++++ b/net/netlabel/netlabel_unlabeled.c
+@@ -375,8 +375,6 @@ int netlbl_unlhsh_add(struct net *net,
+ struct netlbl_unlhsh_iface *iface;
+ struct audit_buffer *audit_buf = NULL;
+ struct lsmcontext context;
+- char *secctx = NULL;
+- u32 secctx_len;
+ struct lsmblob blob;
+
+ if (addr_len != sizeof(struct in_addr) &&
+@@ -444,12 +442,9 @@ int netlbl_unlhsh_add(struct net *net,
+ * security_secid_to_secctx() will know which security module
+ * to use to create the secctx. */
+ lsmblob_init(&blob, secid);
+- if (security_secid_to_secctx(&blob,
+- &secctx,
+- &secctx_len) == 0) {
+- audit_log_format(audit_buf, " sec_obj=%s", secctx);
+- /* scaffolding */
+- lsmcontext_init(&context, secctx, secctx_len, 0);
++ if (security_secid_to_secctx(&blob, &context) == 0) {
++ audit_log_format(audit_buf, " sec_obj=%s",
++ context.context);
+ security_release_secctx(&context);
+ }
+ audit_log_format(audit_buf, " res=%u", ret_val == 0 ? 1 : 0);
+@@ -482,8 +477,6 @@ static int netlbl_unlhsh_remove_addr4(struct net *net,
+ struct audit_buffer *audit_buf;
+ struct net_device *dev;
+ struct lsmcontext context;
+- char *secctx;
+- u32 secctx_len;
+ struct lsmblob blob;
+
+ spin_lock(&netlbl_unlhsh_lock);
+@@ -510,11 +503,9 @@ static int netlbl_unlhsh_remove_addr4(struct net *net,
+ if (entry != NULL)
+ lsmblob_init(&blob, entry->secid);
+ if (entry != NULL &&
+- security_secid_to_secctx(&blob,
+- &secctx, &secctx_len) == 0) {
+- audit_log_format(audit_buf, " sec_obj=%s", secctx);
+- /* scaffolding */
+- lsmcontext_init(&context, secctx, secctx_len, 0);
++ security_secid_to_secctx(&blob, &context) == 0) {
++ audit_log_format(audit_buf, " sec_obj=%s",
++ context.context);
+ security_release_secctx(&context);
+ }
+ audit_log_format(audit_buf, " res=%u", entry != NULL ? 1 : 0);
+@@ -553,8 +544,6 @@ static int netlbl_unlhsh_remove_addr6(struct net *net,
+ struct audit_buffer *audit_buf;
+ struct net_device *dev;
+ struct lsmcontext context;
+- char *secctx;
+- u32 secctx_len;
+ struct lsmblob blob;
+
+ spin_lock(&netlbl_unlhsh_lock);
+@@ -580,10 +569,9 @@ static int netlbl_unlhsh_remove_addr6(struct net *net,
+ if (entry != NULL)
+ lsmblob_init(&blob, entry->secid);
+ if (entry != NULL &&
+- security_secid_to_secctx(&blob,
+- &secctx, &secctx_len) == 0) {
+- audit_log_format(audit_buf, " sec_obj=%s", secctx);
+- lsmcontext_init(&context, secctx, secctx_len, 0);
++ security_secid_to_secctx(&blob, &context) == 0) {
++ audit_log_format(audit_buf, " sec_obj=%s",
++ context.context);
+ security_release_secctx(&context);
+ }
+ audit_log_format(audit_buf, " res=%u", entry != NULL ? 1 : 0);
+@@ -1106,8 +1094,6 @@ static int netlbl_unlabel_staticlist_gen(u32 cmd,
+ struct lsmcontext context;
+ void *data;
+ u32 secid;
+- char *secctx;
+- u32 secctx_len;
+ struct lsmblob blob;
+
+ data = genlmsg_put(cb_arg->skb, NETLINK_CB(cb_arg->nl_cb->skb).portid,
+@@ -1167,15 +1153,13 @@ static int netlbl_unlabel_staticlist_gen(u32 cmd,
+ * security_secid_to_secctx() will know which security module
+ * to use to create the secctx. */
+ lsmblob_init(&blob, secid);
+- ret_val = security_secid_to_secctx(&blob, &secctx, &secctx_len);
++ ret_val = security_secid_to_secctx(&blob, &context);
+ if (ret_val != 0)
+ goto list_cb_failure;
+ ret_val = nla_put(cb_arg->skb,
+ NLBL_UNLABEL_A_SECCTX,
+- secctx_len,
+- secctx);
+- /* scaffolding */
+- lsmcontext_init(&context, secctx, secctx_len, 0);
++ context.len,
++ context.context);
+ security_release_secctx(&context);
+ if (ret_val != 0)
+ goto list_cb_failure;
+diff --git a/net/netlabel/netlabel_user.c b/net/netlabel/netlabel_user.c
+index ef139d8ae7cd..951ba0639d20 100644
+--- a/net/netlabel/netlabel_user.c
++++ b/net/netlabel/netlabel_user.c
+@@ -85,8 +85,6 @@ struct audit_buffer *netlbl_audit_start_common(int type,
+ {
+ struct audit_buffer *audit_buf;
+ struct lsmcontext context;
+- char *secctx;
+- u32 secctx_len;
+ struct lsmblob blob;
+
+ if (audit_enabled == AUDIT_OFF)
+@@ -102,9 +100,8 @@ struct audit_buffer *netlbl_audit_start_common(int type,
+
+ lsmblob_init(&blob, audit_info->secid);
+ if (audit_info->secid != 0 &&
+- security_secid_to_secctx(&blob, &secctx, &secctx_len) == 0) {
+- audit_log_format(audit_buf, " subj=%s", secctx);
+- lsmcontext_init(&context, secctx, secctx_len, 0);/*scaffolding*/
++ security_secid_to_secctx(&blob, &context) == 0) {
++ audit_log_format(audit_buf, " subj=%s", context.context);
+ security_release_secctx(&context);
+ }
+
diff --git a/security/security.c b/security/security.c
-index 4ba1a6ed36e0..8aa107b57af9 100644
+index 904ae6c46be0..aab6d3f86e4a 100644
--- a/security/security.c
+++ b/security/security.c
-@@ -1011,12 +1011,33 @@ void security_inode_free(struct inode *inode)
- inode_free_by_rcu);
+@@ -2252,18 +2252,22 @@ int security_ismaclabel(const char *name)
}
-
-+/*
-+ * security_dentry_init_security - initial context for a dentry
-+ * @dentry: directory entry
-+ * @mode: access mode
-+ * @name: path name
-+ * @context: resulting security context
-+ *
-+ * Use at most one security module to get the initial
-+ * security context. Do not use the "display".
-+ *
-+ * Returns -EOPNOTSUPP if not supplied by any module or the module result.
-+ */
- int security_dentry_init_security(struct dentry *dentry, int mode,
-- const struct qstr *name, void **ctx,
-- u32 *ctxlen)
-+ const struct qstr *name,
-+ struct lsmcontext *cp)
- {
-- return call_int_hook(dentry_init_security, -EOPNOTSUPP, dentry, mode,
-- name, ctx, ctxlen);
-+ struct security_hook_list *hp;
+ EXPORT_SYMBOL(security_ismaclabel);
+
+-int security_secid_to_secctx(struct lsmblob *blob, char **secdata, u32 *seclen)
++int security_secid_to_secctx(struct lsmblob *blob, struct lsmcontext *cp)
+ {
+ struct security_hook_list *hp;
+ int ilsm = lsm_task_ilsm(current);
+
++ memset(cp, 0, sizeof(*cp));
+
-+ hlist_for_each_entry(hp, &security_hook_heads.dentry_init_security,
-+ list) {
-+ cp->slot = hp->lsmid->slot;
-+ return hp->hook.dentry_init_security(dentry, mode, name,
-+ (void **)&cp->context,
-+ &cp->len);
-+ }
-+
-+ return -EOPNOTSUPP;
- }
- EXPORT_SYMBOL(security_dentry_init_security);
-
+ hlist_for_each_entry(hp, &security_hook_heads.secid_to_secctx, list) {
+ if (WARN_ON(hp->lsmid->slot < 0 || hp->lsmid->slot >= lsm_slot))
+ continue;
+- if (ilsm == LSMBLOB_INVALID || ilsm == hp->lsmid->slot)
++ if (ilsm == LSMBLOB_INVALID || ilsm == hp->lsmid->slot) {
++ cp->slot = hp->lsmid->slot;
+ return hp->hook.secid_to_secctx(
+ blob->secid[hp->lsmid->slot],
+- secdata, seclen);
++ &cp->context, &cp->len);
++ }
+ }
+
+ return LSM_RET_DEFAULT(secid_to_secctx);
--
-2.20.1
+2.25.4