validation/sm_array_overflow5.c

   1 #include <stdio.h>
   2 #include <string.h>
   3 #include "check_debug.h"
   4
   5 void *kmalloc(int size, int mask);
   6
   7 struct foo {
   8         int x, y, z;
   9         int buf[0];
  10 };
  11
  12 int main(void)
  13 {
  14         struct foo *p;
  15
  16         p = kmalloc(sizeof(*p) + 100, 0);
  17         if (!p)
  18                 return -12;
  19         __smatch_buf_size(p->buf);
  20
  21         return 0;
  22 }
  23
  24
  25 /*
  26  * check-name: smatch: overflow check #5
  27  * check-command: smatch -p=kernel -I.. sm_array_overflow5.c
  28  *
  29  * check-output-start
  30 sm_array_overflow5.c:19 main() buf size: 'p->buf' 25 elements, 100 bytes
  31  * check-output-end
  32  */