1  /* { dg-do compile } */
       2  /* { dg-options "-fanalyzer" } */
       3  /* { dg-require-effective-target analyzer } */
       4  /* { dg-skip-if "structure layout assumption not met" { default_packed } } */
       5  
       6  #include <string.h>
       7  
       8  #include "test-uaccess.h"
       9  
      10  typedef unsigned char u8;
      11  typedef unsigned int u32;
      12  
      13  struct st
      14  {
      15    u8 i;  /* { dg-message "padding after field 'i' is uninitialized \\(3 bytes\\)" } */
      16    u32 j; /* { dg-message "field 'j' is uninitialized \\(4 bytes\\)" } */
      17  };
      18  
      19  void test (void __user *dst, u8 a)
      20  {
      21    struct st s; /* { dg-message "region created on stack here" "where" } */
      22    /* { dg-message "capacity: 8 bytes" "capacity" { target *-*-* } .-1 } */
      23    /* { dg-message "suggest forcing zero-initialization by providing a '.0.' initializer" "fix-it hint" { target *-*-* } .-2 } */  
      24    s.i = a;
      25    copy_to_user(dst, &s, sizeof (struct st)); /* { dg-warning "potential exposure of sensitive information by copying uninitialized data from stack" "warning" } */
      26    /* { dg-message "7 bytes are uninitialized" "note how much" { target *-*-* } .-1 } */
      27  }