[Bug c++/69687] Buffer Overflow in libiberty

[boehme.marcel at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69687

--- Comment #7 from Marcel Böhme <boehme.marcel at gmail dot com> ---
Created attachment 37620
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37620&action=edit
Valgrind This

$ cat compileme.c
#include<stdio.h>
#include<stdlib.h>

const char*
____________________X00020A___R0020A__U000R03000N99999999_020A__K000(){
  char *p;
  p = (char *) malloc(19);
  p = (char *) malloc(12);
  free(p);
  p = (char *) malloc(16);
  return "Hello World!";
}

int main()
{
  
printf("%s\n",____________________X00020A___R0020A__U000R03000N99999999_020A__K000());
   return 0;
}

$ g++ compileme.c -o temp
$ sed -b s/Z68/_20/g temp > valgrindme
$ chmod u+x valgrindme
$ ./valgrindme
Hello World!
$ valgrind --leak-check=yes ./valgrindme
..
$ gdb ./valgrindme
..