LibBareMetal: Don't try to print characters from a null pointer

rkm · Mar 4, 2020 · dfa69b8 · dfa69b8
1 parent 783c995
commit dfa69b8
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/Libraries/LibBareMetal/Output/kprintf.cpp b/Libraries/LibBareMetal/Output/kprintf.cpp
@@ -155,13 +155,17 @@ static void debugger_putch(char*&, char ch)
 
 extern "C" int dbgputstr(const char* characters, int length)
 {
+ if (!characters)
+ return 0;
  for (int i = 0; i < length; ++i)
  debugger_out(characters[i]);
  return 0;
 }
 
 extern "C" int kernelputstr(const char* characters, int length)
 {
+ if (!characters)
+ return 0;
  for (int i = 0; i < length; ++i)
  console_out(characters[i]);
  return 0;