iconvdata/bug-iconv13.c

   1 /* bug 24973: Test EUC-KR module
   2    Copyright (C) 2020-2023 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <iconv.h>
  21 #include <stdio.h>
  22 #include <support/check.h>
  23
  24 static int
  25 do_test (void)
  26 {
  27   iconv_t cd = iconv_open ("UTF-8//IGNORE", "EUC-KR");
  28   TEST_VERIFY_EXIT (cd != (iconv_t) -1);
  29
  30   /* 0xfe (->0x7e : row 94) and 0xc9 (->0x49 : row 41) are user-defined
  31      areas, which are not allowed and should be skipped over due to
  32      //IGNORE.  The trailing 0xfe also is an incomplete sequence, which
  33      should be checked first.  */
  34   char input[4] = { '\xc9', '\xa1', '\0', '\xfe' };
  35   char *inptr = input;
  36   size_t insize = sizeof (input);
  37   char output[4];
  38   char *outptr = output;
  39   size_t outsize = sizeof (output);
  40
  41   /* This used to crash due to buffer overrun.  */
  42   TEST_VERIFY (iconv (cd, &inptr, &insize, &outptr, &outsize) == (size_t) -1);
  43   TEST_VERIFY (errno == EINVAL);
  44   /* The conversion should produce one character, the converted null
  45      character.  */
  46   TEST_VERIFY (sizeof (output) - outsize == 1);
  47
  48   TEST_VERIFY_EXIT (iconv_close (cd) != -1);
  49
  50   return 0;
  51 }
  52
  53 #include <support/test-driver.c>