xselinux: Use a privileged bit in the state instead of passing an index
to the permission checking function.
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7ba8e97cba
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@ -63,6 +63,7 @@ typedef struct {
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security_id_t sid;
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struct avc_entry_ref aeref;
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char *command;
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int privileged;
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} SELinuxStateRec;
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/* selection manager */
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@ -287,11 +288,11 @@ SELinuxTypeToClass(RESTYPE type)
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* Performs an SELinux permission check.
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*/
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static int
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SELinuxDoCheck(int clientIndex, SELinuxStateRec *subj, SELinuxStateRec *obj,
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SELinuxDoCheck(SELinuxStateRec *subj, SELinuxStateRec *obj,
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security_class_t class, Mask mode, SELinuxAuditRec *auditdata)
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{
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/* serverClient requests OK */
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if (clientIndex == 0)
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if (subj->privileged)
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return Success;
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auditdata->command = subj->command;
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@ -383,6 +384,7 @@ SELinuxLabelInitial(void)
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/* Do the serverClient */
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state = dixLookupPrivate(&serverClient->devPrivates, stateKey);
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state->privileged = 1;
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sidput(state->sid);
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/* Use the context of the X server process for the serverClient */
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@ -496,8 +498,8 @@ SELinuxDevice(CallbackListPtr *pcbl, pointer unused, pointer calldata)
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obj->sid = subj->sid;
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}
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rc = SELinuxDoCheck(rec->client->index, subj, obj, SECCLASS_X_DEVICE,
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rec->access_mode, &auditdata);
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rc = SELinuxDoCheck(subj, obj, SECCLASS_X_DEVICE, rec->access_mode,
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&auditdata);
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if (rc != Success)
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rec->status = rc;
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}
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@ -509,21 +511,18 @@ SELinuxSend(CallbackListPtr *pcbl, pointer unused, pointer calldata)
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SELinuxStateRec *subj, *obj, ev_sid;
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SELinuxAuditRec auditdata = { .client = rec->client };
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security_class_t class;
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int rc, i, type, clientIndex;
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int rc, i, type;
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if (rec->dev) {
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if (rec->dev)
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subj = dixLookupPrivate(&rec->dev->devPrivates, stateKey);
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clientIndex = -1; /* some nonzero value */
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} else {
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else
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subj = dixLookupPrivate(&rec->client->devPrivates, stateKey);
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clientIndex = rec->client->index;
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}
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obj = dixLookupPrivate(&rec->pWin->devPrivates, stateKey);
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/* Check send permission on window */
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rc = SELinuxDoCheck(clientIndex, subj, obj, SECCLASS_X_DRAWABLE,
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DixSendAccess, &auditdata);
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rc = SELinuxDoCheck(subj, obj, SECCLASS_X_DRAWABLE, DixSendAccess,
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&auditdata);
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if (rc != Success)
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goto err;
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@ -537,8 +536,7 @@ SELinuxSend(CallbackListPtr *pcbl, pointer unused, pointer calldata)
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goto err;
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auditdata.event = type;
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rc = SELinuxDoCheck(clientIndex, subj, &ev_sid, class,
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DixSendAccess, &auditdata);
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rc = SELinuxDoCheck(subj, &ev_sid, class, DixSendAccess, &auditdata);
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if (rc != Success)
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goto err;
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}
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@ -560,8 +558,8 @@ SELinuxReceive(CallbackListPtr *pcbl, pointer unused, pointer calldata)
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obj = dixLookupPrivate(&rec->pWin->devPrivates, stateKey);
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/* Check receive permission on window */
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rc = SELinuxDoCheck(rec->client->index, subj, obj, SECCLASS_X_DRAWABLE,
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DixReceiveAccess, &auditdata);
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rc = SELinuxDoCheck(subj, obj, SECCLASS_X_DRAWABLE, DixReceiveAccess,
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&auditdata);
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if (rc != Success)
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goto err;
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@ -575,8 +573,7 @@ SELinuxReceive(CallbackListPtr *pcbl, pointer unused, pointer calldata)
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goto err;
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auditdata.event = type;
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rc = SELinuxDoCheck(rec->client->index, subj, &ev_sid, class,
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DixReceiveAccess, &auditdata);
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rc = SELinuxDoCheck(subj, &ev_sid, class, DixReceiveAccess, &auditdata);
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if (rc != Success)
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goto err;
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}
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@ -633,8 +630,8 @@ SELinuxExtension(CallbackListPtr *pcbl, pointer unused, pointer calldata)
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/* Perform the security check */
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auditdata.extension = rec->ext->name;
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rc = SELinuxDoCheck(rec->client->index, subj, obj, SECCLASS_X_EXTENSION,
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rec->access_mode, &auditdata);
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rc = SELinuxDoCheck(subj, obj, SECCLASS_X_EXTENSION, rec->access_mode,
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&auditdata);
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if (rc != Success)
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rec->status = rc;
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}
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@ -680,13 +677,12 @@ SELinuxProperty(CallbackListPtr *pcbl, pointer unused, pointer calldata)
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return;
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}
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freecon(con);
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avc_entry_ref_init(&obj->aeref);
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}
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/* Perform the security check */
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auditdata.property = rec->pProp->propertyName;
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rc = SELinuxDoCheck(rec->client->index, subj, obj, SECCLASS_X_PROPERTY,
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rec->access_mode, &auditdata);
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rc = SELinuxDoCheck(subj, obj, SECCLASS_X_PROPERTY, rec->access_mode,
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&auditdata);
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if (rc != Success)
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rec->status = rc;
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}
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@ -741,8 +737,7 @@ SELinuxResource(CallbackListPtr *pcbl, pointer unused, pointer calldata)
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/* Perform the security check */
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auditdata.restype = rec->rtype;
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auditdata.id = rec->id;
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rc = SELinuxDoCheck(rec->client->index, subj, obj, class,
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rec->access_mode, &auditdata);
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rc = SELinuxDoCheck(subj, obj, class, rec->access_mode, &auditdata);
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if (rc != Success)
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rec->status = rc;
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}
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@ -775,8 +770,7 @@ SELinuxScreen(CallbackListPtr *pcbl, pointer is_saver, pointer calldata)
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if (is_saver)
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access_mode <<= 2;
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rc = SELinuxDoCheck(rec->client->index, subj, obj, SECCLASS_X_SCREEN,
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access_mode, &auditdata);
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rc = SELinuxDoCheck(subj, obj, SECCLASS_X_SCREEN, access_mode, &auditdata);
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if (rc != Success)
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rec->status = rc;
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}
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@ -792,8 +786,8 @@ SELinuxClient(CallbackListPtr *pcbl, pointer unused, pointer calldata)
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subj = dixLookupPrivate(&rec->client->devPrivates, stateKey);
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obj = dixLookupPrivate(&rec->target->devPrivates, stateKey);
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rc = SELinuxDoCheck(rec->client->index, subj, obj, SECCLASS_X_CLIENT,
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rec->access_mode, &auditdata);
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rc = SELinuxDoCheck(subj, obj, SECCLASS_X_CLIENT, rec->access_mode,
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&auditdata);
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if (rc != Success)
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rec->status = rc;
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}
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@ -809,8 +803,8 @@ SELinuxServer(CallbackListPtr *pcbl, pointer unused, pointer calldata)
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subj = dixLookupPrivate(&rec->client->devPrivates, stateKey);
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obj = dixLookupPrivate(&serverClient->devPrivates, stateKey);
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rc = SELinuxDoCheck(rec->client->index, subj, obj, SECCLASS_X_SERVER,
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rec->access_mode, &auditdata);
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rc = SELinuxDoCheck(subj, obj, SECCLASS_X_SERVER, rec->access_mode,
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&auditdata);
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if (rc != Success)
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rec->status = rc;
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}
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@ -832,8 +826,8 @@ SELinuxSelection(CallbackListPtr *pcbl, pointer unused, pointer calldata)
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}
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auditdata.selection = rec->name;
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rc = SELinuxDoCheck(rec->client->index, subj, &sel_sid,
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SECCLASS_X_SELECTION, rec->access_mode, &auditdata);
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rc = SELinuxDoCheck(subj, &sel_sid, SECCLASS_X_SELECTION, rec->access_mode,
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&auditdata);
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if (rc != Success)
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rec->status = rc;
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}
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