validation/sm_implied6.c

   1 struct foo {
   2         int a;
   3 };
   4
   5 struct foo *a;
   6 struct foo *b;
   7 struct foo *c;
   8 struct foo *d;
   9 int x, y, z;
  10
  11 void func (void)
  12 {
  13         a = 0;
  14         b = 0;
  15         c = 0;
  16         d = 0;
  17
  18         if (x)
  19                 a = returns_nonnull();
  20         else
  21                 b = returns_nonnull();
  22         if (y)
  23                 a = returns_nonnull();
  24         else
  25                 c = returns_nonnull();
  26         __smatch_extra_values();
  27         if (x || y) {
  28                 a->a = 1;
  29                 b->a = 2;
  30         }else {
  31                 c->a = 3;
  32         }
  33 }
  34 /*
  35  * check-name: Smatch implied #6
  36  * check-command: smatch sm_implied6.c
  37  *
  38  * check-output-start
  39 sm_implied6.c:29 func() error: potential NULL dereference 'b'.
  40  * check-output-end
  41  */