11924 infinite loop in mdb ::load
Reviewed by: John Levon <john.levon@joyent.com>

@@ -20,11 +20,11 @@
  */
 
 /*
  * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
  * Copyright (c) 2012 by Delphix. All rights reserved.
- * Copyright (c) 2012 Joyent, Inc. All rights reserved.
+ * Copyright 2019 Joyent, Inc.
  */
 
 #include <sys/param.h>
 #include <unistd.h>
 #include <strings.h>

@@ -58,26 +58,27 @@
                     strbasename(name));
 
                 /*
                  * Remove any .so(.[0-9]+)? suffix
                  */
-                while ((p = strrchr(buf, '.')) != NULL) {
+                if ((p = strrchr(buf, '.')) != NULL) {
                         for (q = p + 1; isdigit(*q); q++)
                                 ;
 
                         if (*q == '\0') {
+                                if (q > p + 1) {
+
                                 /* found digits to remove */
                                 *p = '\0';
-                                continue;
                         }
-
+                        }
+                        if ((p = strrchr(buf, '.')) != NULL) {
                         if (strcmp(p, ".so") == 0) {
                                 *p = '\0';
-                                break;
                         }
-
                 }
+                }
                 fullname = name;
                 name = buf;
         }
 
         if (!mdb_module_validate_name(name, &wformat))