xnu-3789.1.32.tar.gz

[apple/xnu.git] / security / mac_process.c

diff --git a/security/mac_process.c b/security/mac_process.c
index 929d8107c69e0094213ac092b35497017ded4107..193507f5d58c20d9c06dce15f1f303011b733308 100644 (file)
--- a/security/mac_process.c
+++ b/security/mac_process.c
@@ -73,6 +73,7 @@
 #include <sys/kauth.h>
 #include <sys/imgact.h>
 #include <mach/mach_types.h>
+#include <kern/task.h>
 
 #include <security/mac_internal.h>
 #include <security/mac_mach_internal.h>
@@ -273,8 +274,11 @@ mac_cred_check_label_update(kauth_cred_t cred, struct label *newlabel)
 {
        int error;
 
-       if (!mac_proc_enforce)
-               return (0);
+#if SECURITY_MAC_CHECK_ENFORCE
+    /* 21167099 - only check if we allow write */
+    if (!mac_proc_enforce)
+        return 0;
+#endif
 
        MAC_CHECK(cred_check_label_update, cred, newlabel);
 
@@ -286,16 +290,14 @@ mac_cred_check_visible(kauth_cred_t u1, kauth_cred_t u2)
 {
        int error;
 
-
-
+#if SECURITY_MAC_CHECK_ENFORCE
+       /* 21167099 - only check if we allow write */
        if (!mac_proc_enforce)
-               return (0);
-
-
+               return 0;
+#endif
 
        MAC_CHECK(cred_check_visible, u1, u2);
 
-
        return (error);
 }
 
@@ -313,11 +315,13 @@ mac_proc_check_debug(proc_t curp, struct proc *proc)
        kauth_cred_t cred;
        int error;
 
-
-
-       if (!mac_proc_enforce ||
-           !mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
-               return (0);
+#if SECURITY_MAC_CHECK_ENFORCE
+       /* 21167099 - only check if we allow write */
+       if (!mac_proc_enforce)
+               return 0;
+#endif
+       if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
+               return 0;
 
        cred = kauth_cred_proc_ref(curp);
        MAC_CHECK(proc_check_debug, cred, proc);
@@ -332,9 +336,13 @@ mac_proc_check_fork(proc_t curp)
        kauth_cred_t cred;
        int error;
 
-       if (!mac_proc_enforce ||
-           !mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
-               return (0);
+#if SECURITY_MAC_CHECK_ENFORCE
+       /* 21167099 - only check if we allow write */
+       if (!mac_proc_enforce)
+               return 0;
+#endif
+       if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
+               return 0;
 
        cred = kauth_cred_proc_ref(curp);
        MAC_CHECK(proc_check_fork, cred, curp);
@@ -363,6 +371,16 @@ mac_proc_check_get_task(struct ucred *cred, struct proc *p)
        return (error);
 }
 
+int
+mac_proc_check_expose_task(struct ucred *cred, struct proc *p)
+{
+       int error;
+
+       MAC_CHECK(proc_check_expose_task, cred, p);
+
+       return (error);
+}
+
 int
 mac_proc_check_inherit_ipc_ports(struct proc *p, struct vnode *cur_vp, off_t cur_offset, struct vnode *img_vp, off_t img_offset, struct vnode *scriptvp)
 {
@@ -385,8 +403,12 @@ mac_proc_check_map_anon(proc_t proc, user_addr_t u_addr,
        kauth_cred_t cred;
        int error;
 
-       if (!mac_vm_enforce ||
-           !mac_proc_check_enforce(proc, MAC_VM_ENFORCE))
+#if SECURITY_MAC_CHECK_ENFORCE
+       /* 21167099 - only check if we allow write */
+       if (!mac_vm_enforce)
+               return 0;
+#endif
+       if (!mac_proc_check_enforce(proc, MAC_VM_ENFORCE))
                return (0);
 
        cred = kauth_cred_proc_ref(proc);
@@ -403,8 +425,12 @@ mac_proc_check_mprotect(proc_t proc,
        kauth_cred_t cred;
        int error;
 
-       if (!mac_vm_enforce ||
-           !mac_proc_check_enforce(proc, MAC_VM_ENFORCE))
+#if SECURITY_MAC_CHECK_ENFORCE
+       /* 21167099 - only check if we allow write */
+       if (!mac_vm_enforce)
+               return 0;
+#endif
+       if (!mac_proc_check_enforce(proc, MAC_VM_ENFORCE))
                return (0);
 
        cred = kauth_cred_proc_ref(proc);
@@ -419,7 +445,11 @@ mac_proc_check_run_cs_invalid(proc_t proc)
 {
        int error;
        
-       if (!mac_vm_enforce) return (0);
+#if SECURITY_MAC_CHECK_ENFORCE
+    /* 21167099 - only check if we allow write */
+    if (!mac_vm_enforce)
+        return 0;
+#endif
        
        MAC_CHECK(proc_check_run_cs_invalid, proc);
        
@@ -432,11 +462,13 @@ mac_proc_check_sched(proc_t curp, struct proc *proc)
        kauth_cred_t cred;
        int error;
 
-
-
-       if (!mac_proc_enforce ||
-           !mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
-               return (0);
+#if SECURITY_MAC_CHECK_ENFORCE
+       /* 21167099 - only check if we allow write */
+       if (!mac_proc_enforce)
+               return 0;
+#endif
+       if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
+               return 0;
 
        cred = kauth_cred_proc_ref(curp);
        MAC_CHECK(proc_check_sched, cred, proc);
@@ -451,11 +483,13 @@ mac_proc_check_signal(proc_t curp, struct proc *proc, int signum)
        kauth_cred_t cred;
        int error;
 
-
-
-       if (!mac_proc_enforce ||
-           !mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
-               return (0);
+#if SECURITY_MAC_CHECK_ENFORCE
+       /* 21167099 - only check if we allow write */
+       if (!mac_proc_enforce)
+               return 0;
+#endif
+       if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
+               return 0;
 
        cred = kauth_cred_proc_ref(curp);
        MAC_CHECK(proc_check_signal, cred, proc, signum);
@@ -470,11 +504,13 @@ mac_proc_check_wait(proc_t curp, struct proc *proc)
        kauth_cred_t cred;
        int error;
 
-
-
-       if (!mac_proc_enforce ||
-           !mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
-               return (0);
+#if SECURITY_MAC_CHECK_ENFORCE
+       /* 21167099 - only check if we allow write */
+       if (!mac_proc_enforce)
+               return 0;
+#endif
+       if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
+               return 0;
 
        cred = kauth_cred_proc_ref(curp);
        MAC_CHECK(proc_check_wait, cred, proc);
@@ -483,124 +519,19 @@ mac_proc_check_wait(proc_t curp, struct proc *proc)
        return (error);
 }
 
-#if CONFIG_LCTX
-/*
- * Login Context
- */
-
-int
-mac_proc_check_setlcid (struct proc *p0, struct proc *p,
-                       pid_t pid, pid_t lcid)
-{
-       int error;
-
-       if (!mac_proc_enforce ||
-           !mac_proc_check_enforce(p0, MAC_PROC_ENFORCE))
-               return (0);
-
-       MAC_CHECK(proc_check_setlcid, p0, p, pid, lcid);
-       return (error);
-}
-
-int
-mac_proc_check_getlcid (struct proc *p0, struct proc *p, pid_t pid)
-{
-       int error;
-
-       if (!mac_proc_enforce ||
-           !mac_proc_check_enforce(p0, MAC_PROC_ENFORCE))
-               return (0);
-
-       MAC_CHECK(proc_check_getlcid, p0, p, pid);
-       return (error);
-}
-
-void
-mac_lctx_notify_create (struct proc *p, struct lctx *l)
-{
-       MAC_PERFORM(lctx_notify_create, p, l);
-}
-
-void
-mac_lctx_notify_join (struct proc *p, struct lctx *l)
-{
-       MAC_PERFORM(lctx_notify_join, p, l);
-}
-
-void
-mac_lctx_notify_leave (struct proc *p, struct lctx *l)
-{
-       MAC_PERFORM(lctx_notify_leave, p, l);
-}
-
-struct label *
-mac_lctx_label_alloc(void)
-{
-       struct label *label;
-
-       label = mac_labelzone_alloc(MAC_WAITOK);
-       if (label == NULL)
-               return (NULL);
-       MAC_PERFORM(lctx_label_init, label);
-       return (label);
-}
-
-void
-mac_lctx_label_free(struct label *label)
-{
-
-       MAC_PERFORM(lctx_label_destroy, label);
-       mac_labelzone_free(label);
-}
-
-int
-mac_lctx_label_externalize(struct label *label, char *elements,
-    char *outbuf, size_t outbuflen)
-{
-       int error;
-
-       error = MAC_EXTERNALIZE(lctx, label, elements, outbuf, outbuflen);
-
-       return (error);
-}
-
-int
-mac_lctx_label_internalize(struct label *label, char *string)
-{
-       int error;
-
-       error = MAC_INTERNALIZE(lctx, label, string);
-
-       return (error);
-}
-
-void
-mac_lctx_label_update(struct lctx *l, struct label *newlabel)
-{
-
-       MAC_PERFORM(lctx_label_update, l, newlabel);
-}
-
-int
-mac_lctx_check_label_update(struct lctx *l, struct label *newlabel)
-{
-       int error;
-
-       MAC_CHECK(lctx_check_label_update, l, newlabel);
-
-       return (error);
-}
-#endif /* LCTX */
-
 int
 mac_proc_check_suspend_resume(proc_t curp, int sr)
 {
        kauth_cred_t cred;
        int error;
 
-       if (!mac_proc_enforce ||
-           !mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
-               return (0);
+#if SECURITY_MAC_CHECK_ENFORCE
+       /* 21167099 - only check if we allow write */
+       if (!mac_proc_enforce)
+               return 0;
+#endif
+       if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
+               return 0;
 
        cred = kauth_cred_proc_ref(curp);
        MAC_CHECK(proc_check_suspend_resume, cred, curp, sr);
@@ -615,9 +546,13 @@ mac_proc_check_ledger(proc_t curp, proc_t proc, int ledger_op)
        kauth_cred_t cred;
        int error = 0;
 
-       if (!mac_proc_enforce ||
-           !mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
-               return (0);
+#if SECURITY_MAC_CHECK_ENFORCE
+       /* 21167099 - only check if we allow write */
+       if (!mac_proc_enforce)
+               return 0;
+#endif
+       if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
+               return 0;
 
        cred = kauth_cred_proc_ref(curp);
        MAC_CHECK(proc_check_ledger, cred, proc, ledger_op);
@@ -632,9 +567,13 @@ mac_proc_check_cpumon(proc_t curp)
        kauth_cred_t cred;
        int error = 0;
 
-       if (!mac_proc_enforce ||
-           !mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
-               return (0);
+#if SECURITY_MAC_CHECK_ENFORCE
+       /* 21167099 - only check if we allow write */
+       if (!mac_proc_enforce)
+               return 0;
+#endif
+       if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
+               return 0;
 
        cred = kauth_cred_proc_ref(curp);
        MAC_CHECK(proc_check_cpumon, cred);
@@ -649,9 +588,13 @@ mac_proc_check_proc_info(proc_t curp, proc_t target, int callnum, int flavor)
        kauth_cred_t cred;
        int error = 0;
 
-       if (!mac_proc_enforce ||
-           !mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
-               return (0);
+#if SECURITY_MAC_CHECK_ENFORCE
+       /* 21167099 - only check if we allow write */
+       if (!mac_proc_enforce)
+               return 0;
+#endif
+       if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
+               return 0;
 
        cred = kauth_cred_proc_ref(curp);
        MAC_CHECK(proc_check_proc_info, cred, target, callnum, flavor);
@@ -660,57 +603,45 @@ mac_proc_check_proc_info(proc_t curp, proc_t target, int callnum, int flavor)
        return (error);
 }
 
-struct label *
-mac_thread_label_alloc(void)
-{
-       struct label *label;
-
-       label = mac_labelzone_alloc(MAC_WAITOK);
-       if (label == NULL)
-               return (NULL);
-       MAC_PERFORM(thread_label_init, label);
-       return (label);
-}
-
-void
-mac_thread_label_init(struct uthread *uthread)
+int
+mac_proc_check_get_cs_info(proc_t curp, proc_t target, unsigned int op)
 {
-       uthread->uu_label = mac_thread_label_alloc();
-}
+       kauth_cred_t cred;
+       int error = 0;
 
-void
-mac_thread_label_free(struct label *label)
-{
-       MAC_PERFORM(thread_label_destroy, label);
-       mac_labelzone_free(label);
-}
+#if SECURITY_MAC_CHECK_ENFORCE
+       /* 21167099 - only check if we allow write */
+       if (!mac_proc_enforce)
+               return 0;
+#endif
+       if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
+               return 0;
 
-void
-mac_thread_label_destroy(struct uthread *uthread)
-{
+       cred = kauth_cred_proc_ref(curp);
+       MAC_CHECK(proc_check_get_cs_info, cred, target, op);
+       kauth_cred_unref(&cred);
 
-       mac_thread_label_free(uthread->uu_label);
-       uthread->uu_label = NULL;
+       return (error);
 }
 
-void
-mac_thread_userret(struct thread *td)
+int
+mac_proc_check_set_cs_info(proc_t curp, proc_t target, unsigned int op)
 {
+       kauth_cred_t cred;
+       int error = 0;
 
-       MAC_PERFORM(thread_userret, td);
-}
+#if SECURITY_MAC_CHECK_ENFORCE
+       /* 21167099 - only check if we allow write */
+       if (!mac_proc_enforce)
+               return 0;
+#endif
+       if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
+               return 0;
 
-struct label *
-mac_thread_get_uthreadlabel(struct uthread *uthread)
-{
+       cred = kauth_cred_proc_ref(curp);
+       MAC_CHECK(proc_check_set_cs_info, cred, target, op);
+       kauth_cred_unref(&cred);
 
-       return (uthread->uu_label);
+       return (error);
 }
 
-struct label *
-mac_thread_get_threadlabel(struct thread *thread)
-{
-       struct uthread *uthread = get_bsdthread_info(thread);
-
-       return (mac_thread_get_uthreadlabel(uthread));
-}