1 files changed, 381 insertions, 374 deletions
diff --git a/xorg-server/Xext/xselinux_label.c b/xorg-server/Xext/xselinux_label.c
index 76e537abe..2c33d1cbf 100644
--- a/xorg-server/Xext/xselinux_label.c
+++ b/xorg-server/Xext/xselinux_label.c
@@ -1,374 +1,381 @@
-/************************************************************
-
-Author: Eamon Walsh <ewalsh@tycho.nsa.gov>
-
-Permission to use, copy, modify, distribute, and sell this software and its
-documentation for any purpose is hereby granted without fee, provided that
-this permission notice appear in supporting documentation.  This permission
-notice shall be included in all copies or substantial portions of the
-Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
-AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
-AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-********************************************************/
-
-#ifdef HAVE_DIX_CONFIG_H
-#include <dix-config.h>
-#endif
-
-#include <selinux/label.h>
-
-#include "registry.h"
-#include "xselinuxint.h"
-
-/* selection and property atom cache */
-typedef struct {
-    SELinuxObjectRec prp;
-    SELinuxObjectRec sel;
-} SELinuxAtomRec;
-
-/* dynamic array */
-typedef struct {
-    unsigned size;
-    void **array;
-} SELinuxArrayRec;
-
-/* labeling handle */
-static struct selabel_handle *label_hnd;
-
-/* Array of object classes indexed by resource type */
-SELinuxArrayRec arr_types;
-/* Array of event SIDs indexed by event type */
-SELinuxArrayRec arr_events;
-/* Array of property and selection SID structures */
-SELinuxArrayRec arr_atoms;
-
-/*
- * Dynamic array helpers
- */
-static void *
-SELinuxArrayGet(SELinuxArrayRec *rec, unsigned key)
-{
-    return (rec->size > key) ? rec->array[key] : 0;
-}
-
-static int
-SELinuxArraySet(SELinuxArrayRec *rec, unsigned key, void *val)
-{
-    if (key >= rec->size) {
-	/* Need to increase size of array */
-	rec->array = realloc(rec->array, (key + 1) * sizeof(val));
-	if (!rec->array)
-	    return FALSE;
-	memset(rec->array + rec->size, 0, (key - rec->size + 1) * sizeof(val));
-	rec->size = key + 1;
-    }
-
-    rec->array[key] = val;
-    return TRUE;
-}
-
-static void
-SELinuxArrayFree(SELinuxArrayRec *rec, int free_elements)
-{
-    if (free_elements) {
-	unsigned i = rec->size;
-	while (i)
-	    free(rec->array[--i]);
-    }
-
-    free(rec->array);
-    rec->size = 0;
-    rec->array = NULL;
-}
-
-/*
- * Looks up a name in the selection or property mappings
- */
-static int
-SELinuxAtomToSIDLookup(Atom atom, SELinuxObjectRec *obj, int map, int polymap)
-{
-    const char *name = NameForAtom(atom);
-    security_context_t ctx;
-    int rc = Success;
-
-    obj->poly = 1;
-
-    /* Look in the mappings of names to contexts */
-    if (selabel_lookup_raw(label_hnd, &ctx, name, map) == 0) {
-	obj->poly = 0;
-    } else if (errno != ENOENT) {
-	ErrorF("SELinux: a property label lookup failed!\n");
-	return BadValue;
-    } else if (selabel_lookup_raw(label_hnd, &ctx, name, polymap) < 0) {
-	ErrorF("SELinux: a property label lookup failed!\n");
-	return BadValue;
-    }
-
-    /* Get a SID for context */
-    if (avc_context_to_sid_raw(ctx, &obj->sid) < 0) {
-	ErrorF("SELinux: a context_to_SID_raw call failed!\n");
-	rc = BadAlloc;
-    }
-
-    freecon(ctx);
-    return rc;
-}
-
-/*
- * Looks up the SID corresponding to the given property or selection atom
- */
-int
-SELinuxAtomToSID(Atom atom, int prop, SELinuxObjectRec **obj_rtn)
-{
-    SELinuxAtomRec *rec;
-    SELinuxObjectRec *obj;
-    int rc, map, polymap;
-
-    rec = SELinuxArrayGet(&arr_atoms, atom);
-    if (!rec) {
-	rec = calloc(1, sizeof(SELinuxAtomRec));
-	if (!rec || !SELinuxArraySet(&arr_atoms, atom, rec))
-	    return BadAlloc;
-    }
-
-    if (prop) {
-	obj = &rec->prp;
-	map = SELABEL_X_PROP;
-	polymap = SELABEL_X_POLYPROP;
-    } else {
-	obj = &rec->sel;
-	map = SELABEL_X_SELN;
-	polymap = SELABEL_X_POLYSELN;
-    }
-
-    if (!obj->sid) {
-	rc = SELinuxAtomToSIDLookup(atom, obj, map, polymap);
-	if (rc != Success)
-	    goto out;
-    }
-
-    *obj_rtn = obj;
-    rc = Success;
-out:
-    return rc;
-}
-
-/*
- * Looks up a SID for a selection/subject pair
- */
-int
-SELinuxSelectionToSID(Atom selection, SELinuxSubjectRec *subj,
-		      security_id_t *sid_rtn, int *poly_rtn)
-{
-    int rc;
-    SELinuxObjectRec *obj;
-    security_id_t tsid;
-
-    /* Get the default context and polyinstantiation bit */
-    rc = SELinuxAtomToSID(selection, 0, &obj);
-    if (rc != Success)
-	return rc;
-
-    /* Check for an override context next */
-    if (subj->sel_use_sid) {
-	tsid = subj->sel_use_sid;
-	goto out;
-    }
-
-    tsid = obj->sid;
-
-    /* Polyinstantiate if necessary to obtain the final SID */
-    if (obj->poly && avc_compute_member(subj->sid, obj->sid,
-					SECCLASS_X_SELECTION, &tsid) < 0) {
-	ErrorF("SELinux: a compute_member call failed!\n");
-	return BadValue;
-    }
-out:
-    *sid_rtn = tsid;
-    if (poly_rtn)
-	*poly_rtn = obj->poly;
-    return Success;
-}
-
-/*
- * Looks up a SID for a property/subject pair
- */
-int
-SELinuxPropertyToSID(Atom property, SELinuxSubjectRec *subj,
-		     security_id_t *sid_rtn, int *poly_rtn)
-{
-    int rc;
-    SELinuxObjectRec *obj;
-    security_id_t tsid, tsid2;
-
-    /* Get the default context and polyinstantiation bit */
-    rc = SELinuxAtomToSID(property, 1, &obj);
-    if (rc != Success)
-	return rc;
-
-    /* Check for an override context next */
-    if (subj->prp_use_sid) {
-	tsid = subj->prp_use_sid;
-	goto out;
-    }
-
-    /* Perform a transition */
-    if (avc_compute_create(subj->sid, obj->sid,
-			   SECCLASS_X_PROPERTY, &tsid) < 0) {
-	ErrorF("SELinux: a compute_create call failed!\n");
-	return BadValue;
-    }
-
-    /* Polyinstantiate if necessary to obtain the final SID */
-    if (obj->poly) {
-	tsid2 = tsid;
-	if (avc_compute_member(subj->sid, tsid2,
-			       SECCLASS_X_PROPERTY, &tsid) < 0) {
-	    ErrorF("SELinux: a compute_member call failed!\n");
-	    return BadValue;
-	}
-    }
-out:
-    *sid_rtn = tsid;
-    if (poly_rtn)
-	*poly_rtn = obj->poly;
-    return Success;
-}
-
-/*
- * Looks up the SID corresponding to the given event type
- */
-int
-SELinuxEventToSID(unsigned type, security_id_t sid_of_window,
-		  SELinuxObjectRec *sid_return)
-{
-    const char *name = LookupEventName(type);
-    security_id_t sid;
-    security_context_t ctx;
-    type &= 127;
-
-    sid = SELinuxArrayGet(&arr_events, type);
-    if (!sid) {
-	/* Look in the mappings of event names to contexts */
-	if (selabel_lookup_raw(label_hnd, &ctx, name, SELABEL_X_EVENT) < 0) {
-	    ErrorF("SELinux: an event label lookup failed!\n");
-	    return BadValue;
-	}
-	/* Get a SID for context */
-	if (avc_context_to_sid_raw(ctx, &sid) < 0) {
-	    ErrorF("SELinux: a context_to_SID_raw call failed!\n");
-	    freecon(ctx);
-	    return BadAlloc;
-	}
-	freecon(ctx);
-	/* Cache the SID value */
-	if (!SELinuxArraySet(&arr_events, type, sid))
-	    return BadAlloc;
-    }
-
-    /* Perform a transition to obtain the final SID */
-    if (avc_compute_create(sid_of_window, sid, SECCLASS_X_EVENT,
-			   &sid_return->sid) < 0) {
-	ErrorF("SELinux: a compute_create call failed!\n");
-	return BadValue;
-    }
-
-    return Success;
-}
-
-int
-SELinuxExtensionToSID(const char *name, security_id_t *sid_rtn)
-{
-    security_context_t ctx;
-
-    /* Look in the mappings of extension names to contexts */
-    if (selabel_lookup_raw(label_hnd, &ctx, name, SELABEL_X_EXT) < 0) {
-	ErrorF("SELinux: a property label lookup failed!\n");
-	return BadValue;
-    }
-    /* Get a SID for context */
-    if (avc_context_to_sid_raw(ctx, sid_rtn) < 0) {
-	ErrorF("SELinux: a context_to_SID_raw call failed!\n");
-	freecon(ctx);
-	return BadAlloc;
-    }
-    freecon(ctx);
-    return Success;
-}
-
-/*
- * Returns the object class corresponding to the given resource type.
- */
-security_class_t
-SELinuxTypeToClass(RESTYPE type)
-{
-    void *tmp;
-
-    tmp = SELinuxArrayGet(&arr_types, type & TypeMask);
-    if (!tmp) {
-	unsigned long class = SECCLASS_X_RESOURCE;
-
-	if (type & RC_DRAWABLE)
-	    class = SECCLASS_X_DRAWABLE;
-	else if (type == RT_GC)
-	    class = SECCLASS_X_GC;
-	else if (type == RT_FONT)
-	    class = SECCLASS_X_FONT;
-	else if (type == RT_CURSOR)
-	    class = SECCLASS_X_CURSOR;
-	else if (type == RT_COLORMAP)
-	    class = SECCLASS_X_COLORMAP;
-	else {
-	    /* Need to do a string lookup */
-	    const char *str = LookupResourceName(type);
-	    if (!strcmp(str, "PICTURE"))
-		class = SECCLASS_X_DRAWABLE;
-	    else if (!strcmp(str, "GLYPHSET"))
-		class = SECCLASS_X_FONT;
-	}
-
-	tmp = (void *)class;
-	SELinuxArraySet(&arr_types, type & TypeMask, tmp);
-    }
-
-    return (security_class_t)(unsigned long)tmp;
-}
-
-security_context_t
-SELinuxDefaultClientLabel(void)
-{
-    security_context_t ctx;
-
-    if (selabel_lookup_raw(label_hnd, &ctx, "remote", SELABEL_X_CLIENT) < 0)
-	FatalError("SELinux: failed to look up remote-client context\n");
-
-    return ctx;
-}
-
-void
-SELinuxLabelInit(void)
-{
-    struct selinux_opt selabel_option = { SELABEL_OPT_VALIDATE, (char *)1 };
-
-    label_hnd = selabel_open(SELABEL_CTX_X, &selabel_option, 1);
-    if (!label_hnd)
-	FatalError("SELinux: Failed to open x_contexts mapping in policy\n");
-}
-
-void
-SELinuxLabelReset(void)
-{
-    selabel_close(label_hnd);
-    label_hnd = NULL;
-
-    /* Free local state */
-    SELinuxArrayFree(&arr_types, 0);
-    SELinuxArrayFree(&arr_events, 0);
-    SELinuxArrayFree(&arr_atoms, 1);
-}
+/************************************************************
+
+Author: Eamon Walsh <ewalsh@tycho.nsa.gov>
+
+Permission to use, copy, modify, distribute, and sell this software and its
+documentation for any purpose is hereby granted without fee, provided that
+this permission notice appear in supporting documentation.  This permission
+notice shall be included in all copies or substantial portions of the
+Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+********************************************************/
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include <selinux/label.h>
+
+#include "registry.h"
+#include "xselinuxint.h"
+
+/* selection and property atom cache */
+typedef struct {
+    SELinuxObjectRec prp;
+    SELinuxObjectRec sel;
+} SELinuxAtomRec;
+
+/* dynamic array */
+typedef struct {
+    unsigned size;
+    void **array;
+} SELinuxArrayRec;
+
+/* labeling handle */
+static struct selabel_handle *label_hnd;
+
+/* Array of object classes indexed by resource type */
+SELinuxArrayRec arr_types;
+
+/* Array of event SIDs indexed by event type */
+SELinuxArrayRec arr_events;
+
+/* Array of property and selection SID structures */
+SELinuxArrayRec arr_atoms;
+
+/*
+ * Dynamic array helpers
+ */
+static void *
+SELinuxArrayGet(SELinuxArrayRec * rec, unsigned key)
+{
+    return (rec->size > key) ? rec->array[key] : 0;
+}
+
+static int
+SELinuxArraySet(SELinuxArrayRec * rec, unsigned key, void *val)
+{
+    if (key >= rec->size) {
+        /* Need to increase size of array */
+        rec->array = realloc(rec->array, (key + 1) * sizeof(val));
+        if (!rec->array)
+            return FALSE;
+        memset(rec->array + rec->size, 0, (key - rec->size + 1) * sizeof(val));
+        rec->size = key + 1;
+    }
+
+    rec->array[key] = val;
+    return TRUE;
+}
+
+static void
+SELinuxArrayFree(SELinuxArrayRec * rec, int free_elements)
+{
+    if (free_elements) {
+        unsigned i = rec->size;
+
+        while (i)
+            free(rec->array[--i]);
+    }
+
+    free(rec->array);
+    rec->size = 0;
+    rec->array = NULL;
+}
+
+/*
+ * Looks up a name in the selection or property mappings
+ */
+static int
+SELinuxAtomToSIDLookup(Atom atom, SELinuxObjectRec * obj, int map, int polymap)
+{
+    const char *name = NameForAtom(atom);
+    security_context_t ctx;
+    int rc = Success;
+
+    obj->poly = 1;
+
+    /* Look in the mappings of names to contexts */
+    if (selabel_lookup_raw(label_hnd, &ctx, name, map) == 0) {
+        obj->poly = 0;
+    }
+    else if (errno != ENOENT) {
+        ErrorF("SELinux: a property label lookup failed!\n");
+        return BadValue;
+    }
+    else if (selabel_lookup_raw(label_hnd, &ctx, name, polymap) < 0) {
+        ErrorF("SELinux: a property label lookup failed!\n");
+        return BadValue;
+    }
+
+    /* Get a SID for context */
+    if (avc_context_to_sid_raw(ctx, &obj->sid) < 0) {
+        ErrorF("SELinux: a context_to_SID_raw call failed!\n");
+        rc = BadAlloc;
+    }
+
+    freecon(ctx);
+    return rc;
+}
+
+/*
+ * Looks up the SID corresponding to the given property or selection atom
+ */
+int
+SELinuxAtomToSID(Atom atom, int prop, SELinuxObjectRec ** obj_rtn)
+{
+    SELinuxAtomRec *rec;
+    SELinuxObjectRec *obj;
+    int rc, map, polymap;
+
+    rec = SELinuxArrayGet(&arr_atoms, atom);
+    if (!rec) {
+        rec = calloc(1, sizeof(SELinuxAtomRec));
+        if (!rec || !SELinuxArraySet(&arr_atoms, atom, rec))
+            return BadAlloc;
+    }
+
+    if (prop) {
+        obj = &rec->prp;
+        map = SELABEL_X_PROP;
+        polymap = SELABEL_X_POLYPROP;
+    }
+    else {
+        obj = &rec->sel;
+        map = SELABEL_X_SELN;
+        polymap = SELABEL_X_POLYSELN;
+    }
+
+    if (!obj->sid) {
+        rc = SELinuxAtomToSIDLookup(atom, obj, map, polymap);
+        if (rc != Success)
+            goto out;
+    }
+
+    *obj_rtn = obj;
+    rc = Success;
+ out:
+    return rc;
+}
+
+/*
+ * Looks up a SID for a selection/subject pair
+ */
+int
+SELinuxSelectionToSID(Atom selection, SELinuxSubjectRec * subj,
+                      security_id_t * sid_rtn, int *poly_rtn)
+{
+    int rc;
+    SELinuxObjectRec *obj;
+    security_id_t tsid;
+
+    /* Get the default context and polyinstantiation bit */
+    rc = SELinuxAtomToSID(selection, 0, &obj);
+    if (rc != Success)
+        return rc;
+
+    /* Check for an override context next */
+    if (subj->sel_use_sid) {
+        tsid = subj->sel_use_sid;
+        goto out;
+    }
+
+    tsid = obj->sid;
+
+    /* Polyinstantiate if necessary to obtain the final SID */
+    if (obj->poly && avc_compute_member(subj->sid, obj->sid,
+                                        SECCLASS_X_SELECTION, &tsid) < 0) {
+        ErrorF("SELinux: a compute_member call failed!\n");
+        return BadValue;
+    }
+ out:
+    *sid_rtn = tsid;
+    if (poly_rtn)
+        *poly_rtn = obj->poly;
+    return Success;
+}
+
+/*
+ * Looks up a SID for a property/subject pair
+ */
+int
+SELinuxPropertyToSID(Atom property, SELinuxSubjectRec * subj,
+                     security_id_t * sid_rtn, int *poly_rtn)
+{
+    int rc;
+    SELinuxObjectRec *obj;
+    security_id_t tsid, tsid2;
+
+    /* Get the default context and polyinstantiation bit */
+    rc = SELinuxAtomToSID(property, 1, &obj);
+    if (rc != Success)
+        return rc;
+
+    /* Check for an override context next */
+    if (subj->prp_use_sid) {
+        tsid = subj->prp_use_sid;
+        goto out;
+    }
+
+    /* Perform a transition */
+    if (avc_compute_create(subj->sid, obj->sid, SECCLASS_X_PROPERTY, &tsid) < 0) {
+        ErrorF("SELinux: a compute_create call failed!\n");
+        return BadValue;
+    }
+
+    /* Polyinstantiate if necessary to obtain the final SID */
+    if (obj->poly) {
+        tsid2 = tsid;
+        if (avc_compute_member(subj->sid, tsid2,
+                               SECCLASS_X_PROPERTY, &tsid) < 0) {
+            ErrorF("SELinux: a compute_member call failed!\n");
+            return BadValue;
+        }
+    }
+ out:
+    *sid_rtn = tsid;
+    if (poly_rtn)
+        *poly_rtn = obj->poly;
+    return Success;
+}
+
+/*
+ * Looks up the SID corresponding to the given event type
+ */
+int
+SELinuxEventToSID(unsigned type, security_id_t sid_of_window,
+                  SELinuxObjectRec * sid_return)
+{
+    const char *name = LookupEventName(type);
+    security_id_t sid;
+    security_context_t ctx;
+
+    type &= 127;
+
+    sid = SELinuxArrayGet(&arr_events, type);
+    if (!sid) {
+        /* Look in the mappings of event names to contexts */
+        if (selabel_lookup_raw(label_hnd, &ctx, name, SELABEL_X_EVENT) < 0) {
+            ErrorF("SELinux: an event label lookup failed!\n");
+            return BadValue;
+        }
+        /* Get a SID for context */
+        if (avc_context_to_sid_raw(ctx, &sid) < 0) {
+            ErrorF("SELinux: a context_to_SID_raw call failed!\n");
+            freecon(ctx);
+            return BadAlloc;
+        }
+        freecon(ctx);
+        /* Cache the SID value */
+        if (!SELinuxArraySet(&arr_events, type, sid))
+            return BadAlloc;
+    }
+
+    /* Perform a transition to obtain the final SID */
+    if (avc_compute_create(sid_of_window, sid, SECCLASS_X_EVENT,
+                           &sid_return->sid) < 0) {
+        ErrorF("SELinux: a compute_create call failed!\n");
+        return BadValue;
+    }
+
+    return Success;
+}
+
+int
+SELinuxExtensionToSID(const char *name, security_id_t * sid_rtn)
+{
+    security_context_t ctx;
+
+    /* Look in the mappings of extension names to contexts */
+    if (selabel_lookup_raw(label_hnd, &ctx, name, SELABEL_X_EXT) < 0) {
+        ErrorF("SELinux: a property label lookup failed!\n");
+        return BadValue;
+    }
+    /* Get a SID for context */
+    if (avc_context_to_sid_raw(ctx, sid_rtn) < 0) {
+        ErrorF("SELinux: a context_to_SID_raw call failed!\n");
+        freecon(ctx);
+        return BadAlloc;
+    }
+    freecon(ctx);
+    return Success;
+}
+
+/*
+ * Returns the object class corresponding to the given resource type.
+ */
+security_class_t
+SELinuxTypeToClass(RESTYPE type)
+{
+    void *tmp;
+
+    tmp = SELinuxArrayGet(&arr_types, type & TypeMask);
+    if (!tmp) {
+        unsigned long class = SECCLASS_X_RESOURCE;
+
+        if (type & RC_DRAWABLE)
+            class = SECCLASS_X_DRAWABLE;
+        else if (type == RT_GC)
+            class = SECCLASS_X_GC;
+        else if (type == RT_FONT)
+            class = SECCLASS_X_FONT;
+        else if (type == RT_CURSOR)
+            class = SECCLASS_X_CURSOR;
+        else if (type == RT_COLORMAP)
+            class = SECCLASS_X_COLORMAP;
+        else {
+            /* Need to do a string lookup */
+            const char *str = LookupResourceName(type);
+
+            if (!strcmp(str, "PICTURE"))
+                class = SECCLASS_X_DRAWABLE;
+            else if (!strcmp(str, "GLYPHSET"))
+                class = SECCLASS_X_FONT;
+        }
+
+        tmp = (void *) class;
+        SELinuxArraySet(&arr_types, type & TypeMask, tmp);
+    }
+
+    return (security_class_t) (unsigned long) tmp;
+}
+
+security_context_t
+SELinuxDefaultClientLabel(void)
+{
+    security_context_t ctx;
+
+    if (selabel_lookup_raw(label_hnd, &ctx, "remote", SELABEL_X_CLIENT) < 0)
+        FatalError("SELinux: failed to look up remote-client context\n");
+
+    return ctx;
+}
+
+void
+SELinuxLabelInit(void)
+{
+    struct selinux_opt selabel_option = { SELABEL_OPT_VALIDATE, (char *) 1 };
+
+    label_hnd = selabel_open(SELABEL_CTX_X, &selabel_option, 1);
+    if (!label_hnd)
+        FatalError("SELinux: Failed to open x_contexts mapping in policy\n");
+}
+
+void
+SELinuxLabelReset(void)
+{
+    selabel_close(label_hnd);
+    label_hnd = NULL;
+
+    /* Free local state */
+    SELinuxArrayFree(&arr_types, 0);
+    SELinuxArrayFree(&arr_events, 0);
+    SELinuxArrayFree(&arr_atoms, 1);
+}