8030763: Validate global memory allocation

Summary: Add length checks where necessary
Reviewed-by: coleenp, mschoene

src/os/bsd/vm/os_bsd.cpp

 /*
- * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2014, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -1115,10 +1115,6 @@ void os::die() {
   ::abort();
 }
 
-// unused on bsd for now.
-void os::set_error_file(const char *logfile) {}
-
-
 // This method is a copy of JDK's sysGetLastErrorString
 // from src/solaris/hpi/src/system_md.c
 
@@ -1808,6 +1804,7 @@ void os::jvm_path(char *buf, jint buflen) {
         // determine if this is a legacy image or modules image
         // modules image doesn't have "jre" subdirectory
         len = strlen(buf);
+        assert(len < buflen, "Ran out of buffer space");
         jrelib_p = buf + len;
 
         // Add the appropriate library subdir
@@ -1841,7 +1838,7 @@ void os::jvm_path(char *buf, jint buflen) {
     }
   }
 
-  strcpy(saved_jvm_path, buf);
+  strncpy(saved_jvm_path, buf, MAXPATHLEN);
 }
 
 void os::print_jni_name_prefix_on(outputStream* st, int args_size) {

src/os/linux/vm/os_linux.cpp

 /*
- * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2014, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -1572,9 +1572,6 @@ void os::die() {
   ::abort();
 }
 
-// unused on linux for now.
-void os::set_error_file(const char *logfile) {}
-
 
 // This method is a copy of JDK's sysGetLastErrorString
 // from src/solaris/hpi/src/system_md.c
@@ -2399,6 +2396,7 @@ void os::jvm_path(char *buf, jint buflen) {
         // determine if this is a legacy image or modules image
         // modules image doesn't have "jre" subdirectory
         len = strlen(buf);
+        assert(len < buflen, "Ran out of buffer room");
         jrelib_p = buf + len;
         snprintf(jrelib_p, buflen-len, "/jre/lib/%s", cpu_arch);
         if (0 != access(buf, F_OK)) {
@@ -2419,7 +2417,7 @@ void os::jvm_path(char *buf, jint buflen) {
     }
   }
 
-  strcpy(saved_jvm_path, buf);
+  strncpy(saved_jvm_path, buf, MAXPATHLEN);
 }
 
 void os::print_jni_name_prefix_on(outputStream* st, int args_size) {

src/os/solaris/vm/os_solaris.cpp

 /*
- * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -1788,9 +1788,6 @@ void os::die() {
   ::abort(); // dump core (for debugging)
 }
 
-// unused
-void os::set_error_file(const char *logfile) {}
-
 // DLL functions
 
 const char* os::dll_file_extension() { return ".so"; }
@@ -2474,6 +2471,7 @@ void os::jvm_path(char *buf, jint buflen) {
         // determine if this is a legacy image or modules image
         // modules image doesn't have "jre" subdirectory
         len = strlen(buf);
+        assert(len < buflen, "Ran out of buffer space");
         jrelib_p = buf + len;
         snprintf(jrelib_p, buflen-len, "/jre/lib/%s", cpu_arch);
         if (0 != access(buf, F_OK)) {
@@ -2492,7 +2490,7 @@ void os::jvm_path(char *buf, jint buflen) {
     }
   }
 
-  strcpy(saved_jvm_path, buf);
+  strncpy(saved_jvm_path, buf, MAXPATHLEN);
 }
 
 

src/os/windows/vm/os_windows.cpp

 /*
- * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -1819,7 +1819,8 @@ void os::jvm_path(char *buf, jint buflen) {
      // libjvm.so is installed there (append a fake suffix
      // hotspot/libjvm.so).
      char* java_home_var = ::getenv("JAVA_HOME");
-     if (java_home_var != NULL && java_home_var[0] != 0) {
+     if (java_home_var != NULL && java_home_var[0] != 0 &&
+         strlen(java_home_var) < (size_t)buflen) {
 
         strncpy(buf, java_home_var, buflen);
 
@@ -1837,9 +1838,9 @@ void os::jvm_path(char *buf, jint buflen) {
   }
 
   if(buf[0] == '\0') {
-  GetModuleFileName(vm_lib_handle, buf, buflen);
+    GetModuleFileName(vm_lib_handle, buf, buflen);
   }
-  strcpy(saved_jvm_path, buf);
+  strncpy(saved_jvm_path, buf, MAX_PATH);
 }
 
 
@@ -2290,19 +2291,8 @@ LONG WINAPI Handle_FLT_Exception(struct _EXCEPTION_POINTERS* exceptionInfo) {
       }
 
 */
-#endif //_WIN64
-
-
-// Fatal error reporting is single threaded so we can make this a
-// static and preallocated.  If it's more than MAX_PATH silently ignore
-// it.
-static char saved_error_file[MAX_PATH] = {0};
+#endif // _WIN64
 
-void os::set_error_file(const char *logfile) {
-  if (strlen(logfile) <= MAX_PATH) {
-    strncpy(saved_error_file, logfile, MAX_PATH);
-  }
-}
 
 static inline void report_error(Thread* t, DWORD exception_code,
                                 address addr, void* siginfo, void* context) {

src/share/vm/compiler/compileBroker.cpp

 /*
- * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2014, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -2089,6 +2089,7 @@ void CompileBroker::set_last_compile(CompilerThread* thread, methodHandle method
   ResourceMark rm;
   char* method_name = method->name()->as_C_string();
   strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length);
+  _last_method_compiled[CompileBroker::name_buffer_length - 1] = '\0'; // ensure null terminated
   char current_method[CompilerCounters::cmname_buffer_length];
   size_t maxLen = CompilerCounters::cmname_buffer_length;
 

src/share/vm/runtime/os.hpp

 /*
- * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -470,9 +470,6 @@ class os: AllStatic {
   // run cmd in a separate process and return its exit code; or -1 on failures
   static int fork_and_exec(char *cmd);
 
-  // Set file to send error reports.
-  static void set_error_file(const char *logfile);
-
   // os::exit() is merged with vm_exit()
   // static void exit(int num);
 

src/share/vm/utilities/vmError.cpp

 /*
- * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2014, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -975,7 +975,6 @@ void VMError::report_and_die() {
       if (fd != -1) {
         out.print_raw("# An error report file with more information is saved as:\n# ");
         out.print_raw_cr(buffer);
-        os::set_error_file(buffer);
 
         log.set_fd(fd);
       } else {