diff mbox series

[4/7] iconv: Preserve iconv -c error exit on invalid inputs (bug 32046)

Message ID 099bb03ee26b92b3152b6d81e33d30e0529504a0.1722851053.git.fweimer@redhat.com
State New
Headers show
Series Various iconv (the program) fixes | expand

Commit Message

Florian Weimer Aug. 5, 2024, 9:49 a.m. UTC
In several converters, a __GCONV_ILLEGAL_INPUT result gets overwritten
with __GCONV_FULL_OUTPUT.  As a result, iconv (the function) returns
E2BIG instead of EILSEQ.  The iconv program does not see the original
EILSEQ failure, does not recognize the invalid input, and may
incorrectly exit successfully.

To address this, a new __flags bit is used to indicate a sticky input
error state.  All __GCONV_ILLEGAL_INPUT results are replaced with a
function call that sets this new __GCONV_ENCOUNTERED_ILLEGAL_INPUT and
returns __GCONV_ILLEGAL_INPUT.  The iconv program checks for
__GCONV_ENCOUNTERED_ILLEGAL_INPUT and overrides the exit status.

The converter changes introducing __gconv_mark_illegal_input are
mostly mechanical, except for the res variable initialization in
iconvdata/iso-2022-jp.c: this error gets overwritten with __GCONV_OK
and other results in the following code.  If res ==
__GCONV_ILLEGAL_INPUT afterwards, STANDARD_TO_LOOP_ERR_HANDLER below
will handle it.

The __gconv_mark_illegal_input changes do not alter the errno value
set by the iconv function.  This is simpler to implement than
reviewing each __GCONV_FULL_OUTPUT result and adjust it not to
override a previous __GCONV_ILLEGAL_INPUT result.  Doing it that way
would also change some E2BIG errors in to EILSEQ errors, so it had to
be done conditionally (under a flag set by the iconv program only), to
avoid confusing buffer management in other applications.
---
 iconv/Makefile                       |   4 +
 iconv/gconv_int.h                    |  30 ++++++
 iconv/gconv_simple.c                 |  18 ++--
 iconv/gconv_trans.c                  |   2 +-
 iconv/iconv_prog.c                   |   5 +
 iconv/loop.c                         |   5 +-
 iconv/tst-iconv-sticky-input-error.c | 135 +++++++++++++++++++++++
 iconv/tst-iconv_prog-buffer.sh       |   3 +-
 iconvdata/cp932.c                    |   6 +-
 iconvdata/euc-jp-ms.c                |   8 +-
 iconvdata/gbbig5.c                   |   4 +-
 iconvdata/ibm1364.c                  |   8 +-
 iconvdata/iso646.c                   | 154 +++++++++++++--------------
 iconvdata/unicode.c                  |   2 +-
 iconvdata/utf-16.c                   |   2 +-
 iconvdata/utf-32.c                   |   2 +-
 16 files changed, 280 insertions(+), 108 deletions(-)
 create mode 100644 iconv/tst-iconv-sticky-input-error.c
diff mbox series

Patch

diff --git a/iconv/Makefile b/iconv/Makefile
index 2e9ce26573..6708e73791 100644
--- a/iconv/Makefile
+++ b/iconv/Makefile
@@ -57,6 +57,10 @@  tests = \
 	tst-iconv-opt \
 	# tests
 
+tests-internal = \
+  tst-iconv-sticky-input-error \
+  # tests-internal
+
 others		= iconv_prog iconvconfig
 install-others-programs	= $(inst_bindir)/iconv
 install-sbin	= iconvconfig
diff --git a/iconv/gconv_int.h b/iconv/gconv_int.h
index 9fece3ea14..cd452d94cc 100644
--- a/iconv/gconv_int.h
+++ b/iconv/gconv_int.h
@@ -331,4 +331,34 @@  extern wint_t __gconv_btwoc_ascii (struct __gconv_step *step, unsigned char c);
 
 __END_DECLS
 
+/* Internal extensions for <gconv.h>.  */
+
+/* Internal flags for __flags in struct __gconv_step_data.  Overlaps
+   with flags for __gconv_open.  */
+enum
+  {
+    /* The conversion encountered an illegal input character at one
+       point.  */
+    __GCONV_ENCOUNTERED_ILLEGAL_INPUT = 1U << 30,
+  };
+
+/* Mark *STEP_DATA as having seen illegal input, and return
+   __GCONV_ILLEGAL_INPUT.  */
+static inline int
+__gconv_mark_illegal_input (struct __gconv_step_data *step_data)
+{
+  step_data->__flags |= __GCONV_ENCOUNTERED_ILLEGAL_INPUT;
+  return __GCONV_ILLEGAL_INPUT;
+}
+
+/* Returns true if any of the conversion steps encountered illegal input.  */
+static _Bool __attribute__ ((unused))
+__gconv_has_illegal_input (__gconv_t cd)
+{
+  for (size_t i = 0; i < cd->__nsteps; ++i)
+    if (cd->__data[i].__flags & __GCONV_ENCOUNTERED_ILLEGAL_INPUT)
+      return true;
+  return false;
+}
+
 #endif /* gconv_int.h */
diff --git a/iconv/gconv_simple.c b/iconv/gconv_simple.c
index 257be2f8ff..f22002cf81 100644
--- a/iconv/gconv_simple.c
+++ b/iconv/gconv_simple.c
@@ -207,7 +207,7 @@  ucs4_internal_loop (struct __gconv_step *step,
 	     UCS4 does not allow such values.  */
 	  if (irreversible == NULL)
 	    /* We are transliterating, don't try to correct anything.  */
-	    return __GCONV_ILLEGAL_INPUT;
+	    return __gconv_mark_illegal_input (step_data);
 
 	  if (flags & __GCONV_IGNORE_ERRORS)
 	    {
@@ -218,7 +218,7 @@  ucs4_internal_loop (struct __gconv_step *step,
 
 	  *inptrp = inptr;
 	  *outptrp = outptr;
-	  return __GCONV_ILLEGAL_INPUT;
+	  return __gconv_mark_illegal_input (step_data);
 	}
 
       put32 (outptr, inval);
@@ -276,7 +276,7 @@  ucs4_internal_loop_single (struct __gconv_step *step,
       if (!(flags & __GCONV_IGNORE_ERRORS))
 	{
 	  *inptrp -= cnt - (state->__count & 7);
-	  return __GCONV_ILLEGAL_INPUT;
+	  return __gconv_mark_illegal_input (step_data);
 	}
     }
   else
@@ -453,7 +453,7 @@  ucs4le_internal_loop (struct __gconv_step *step,
 	     UCS4 does not allow such values.  */
 	  if (irreversible == NULL)
 	    /* We are transliterating, don't try to correct anything.  */
-	    return __GCONV_ILLEGAL_INPUT;
+	    return __gconv_mark_illegal_input (step_data);
 
 	  if (flags & __GCONV_IGNORE_ERRORS)
 	    {
@@ -464,7 +464,7 @@  ucs4le_internal_loop (struct __gconv_step *step,
 
 	  *inptrp = inptr;
 	  *outptrp = outptr;
-	  return __GCONV_ILLEGAL_INPUT;
+	  return __gconv_mark_illegal_input (step_data);
 	}
 
       put32 (outptr, inval);
@@ -523,7 +523,7 @@  ucs4le_internal_loop_single (struct __gconv_step *step,
 	 represent the result.  This is a genuine bug in the input since
 	 UCS4 does not allow such values.  */
       if (!(flags & __GCONV_IGNORE_ERRORS))
-	return __GCONV_ILLEGAL_INPUT;
+	return __gconv_mark_illegal_input (step_data);
     }
   else
     {
@@ -969,7 +969,7 @@  ucs4le_internal_loop_single (struct __gconv_step *step,
 	   surrogates pass through, attackers could make a security	      \
 	   hole exploit by synthesizing any desired plane 1-16		      \
 	   character.  */						      \
-	result = __GCONV_ILLEGAL_INPUT;					      \
+	result = __gconv_mark_illegal_input (step_data);		      \
 	if (! ignore_errors_p ())					      \
 	  break;							      \
 	inptr += 4;							      \
@@ -1012,7 +1012,7 @@  ucs4le_internal_loop_single (struct __gconv_step *step,
 	   them.  (Catching this here is not security relevant.)  */	      \
 	if (! ignore_errors_p ())					      \
 	  {								      \
-	    result = __GCONV_ILLEGAL_INPUT;				      \
+	    result = __gconv_mark_illegal_input (step_data);		      \
 	    break;							      \
 	  }								      \
 	inptr += 2;							      \
@@ -1061,7 +1061,7 @@  ucs4le_internal_loop_single (struct __gconv_step *step,
 	   character.  */						      \
 	if (! ignore_errors_p ())					      \
 	  {								      \
-	    result = __GCONV_ILLEGAL_INPUT;				      \
+	    result = __gconv_mark_illegal_input (step_data);		      \
 	    break;							      \
 	  }								      \
 	inptr += 4;							      \
diff --git a/iconv/gconv_trans.c b/iconv/gconv_trans.c
index 08b7a3f71d..70bc680eeb 100644
--- a/iconv/gconv_trans.c
+++ b/iconv/gconv_trans.c
@@ -232,6 +232,6 @@  __gconv_transliterate (struct __gconv_step *step,
     }
 
   /* Haven't found a match.  */
-  return __GCONV_ILLEGAL_INPUT;
+  return __gconv_mark_illegal_input (step_data);
 }
 libc_hidden_def (__gconv_transliterate)
diff --git a/iconv/iconv_prog.c b/iconv/iconv_prog.c
index 88a928557e..5fe4fe7a6c 100644
--- a/iconv/iconv_prog.c
+++ b/iconv/iconv_prog.c
@@ -291,6 +291,11 @@  conversions from `%s' and to `%s' are not supported"),
 	  }
 	while (++remaining < argc);
 
+      /* Ensure that iconv -c still exits with failure if iconv (the
+	 function) has failed with E2BIG instead of EILSEQ.  */
+      if (__gconv_has_illegal_input (cd))
+	status = EXIT_FAILURE;
+
       /* Close the output file now.  */
       if (output != NULL && fclose (output))
 	error (EXIT_FAILURE, errno, _("error while closing output file"));
diff --git a/iconv/loop.c b/iconv/loop.c
index 5340dafc70..199fb28326 100644
--- a/iconv/loop.c
+++ b/iconv/loop.c
@@ -123,8 +123,7 @@ 
    `continue' must reach certain points.  */
 #define STANDARD_FROM_LOOP_ERR_HANDLER(Incr) \
   {									      \
-    result = __GCONV_ILLEGAL_INPUT;					      \
-									      \
+    result = __gconv_mark_illegal_input (step_data);			      \
     if (! ignore_errors_p ())						      \
       break;								      \
 									      \
@@ -142,7 +141,7 @@ 
    points.  */
 #define STANDARD_TO_LOOP_ERR_HANDLER(Incr) \
   {									      \
-    result = __GCONV_ILLEGAL_INPUT;					      \
+    result = __gconv_mark_illegal_input (step_data);			      \
 									      \
     if (irreversible == NULL)						      \
       /* This means we are in call from __gconv_transliterate.  In this	      \
diff --git a/iconv/tst-iconv-sticky-input-error.c b/iconv/tst-iconv-sticky-input-error.c
new file mode 100644
index 0000000000..c93b5b5160
--- /dev/null
+++ b/iconv/tst-iconv-sticky-input-error.c
@@ -0,0 +1,135 @@ 
+/* Test __GCONV_ENCOUNTERED_ILLEGAL_INPUT, as used by iconv -c (bug 32046).
+   Copyright (C) 2024 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+
+#include <array_length.h>
+#include <errno.h>
+#include <gconv_int.h>
+#include <iconv.h>
+#include <stdbool.h>
+#include <support/check.h>
+#include <support/support.h>
+#include <support/test-driver.h>
+#include <stdio.h>
+
+/* FROM is the input character set, TO the output character set.  If
+   IGNORE is true, the iconv descriptor is set up in the same way as
+   iconv -c would.  INPUT is the input string, EXPECTED_OUTPUT the
+   output.  OUTPUT_LIMIT is a byte count, specifying how many input
+   bytes are passed to the iconv function on each invocation.  */
+static void
+one_direction (const char *from, const char *to, bool ignore,
+               const char *input, const char *expected_output,
+               size_t output_limit)
+{
+  if (test_verbose)
+    {
+      printf ("info: testing from=\"%s\" to=\"%s\" ignore=%d input=\"",
+              from, to, (int) ignore);
+      for (const char *p = input; *p != '\0'; ++p)
+        if (*p >= ' ' && *p <= '~' && *p != '\\' && *p != '"')
+          putchar (*p);
+        else
+          printf ("\\x%02x", *p & 0xff);
+      printf (" \" expected_output=\"%s\" output_limit=%zu\n",
+              expected_output, output_limit);
+    }
+
+  __gconv_t cd;
+  if (ignore)
+    {
+      struct gconv_spec conv_spec;
+      TEST_VERIFY_EXIT (__gconv_create_spec (&conv_spec, from, to)
+                        == &conv_spec);
+      conv_spec.ignore = true;
+      cd = (iconv_t) -1;
+      TEST_COMPARE (__gconv_open (&conv_spec, &cd, 0), __GCONV_OK);
+    }
+  else
+    cd = iconv_open (to, from);
+  TEST_VERIFY_EXIT (cd != (iconv_t) -1);
+
+  char *input_ptr = (char *) input;
+  size_t input_len = strlen (input);
+  char output_buf[20];
+  char *output_ptr = output_buf;
+  size_t output_len;
+  do
+    {
+      output_len = array_end (output_buf) - output_ptr;
+      if (output_len > output_limit)
+        /* Limit the buffer size as requested by the caller.  */
+        output_len = output_limit;
+      TEST_VERIFY_EXIT (output_len > 0);
+      if (input_len == 0)
+        /* Trigger final flush.  */
+        input_ptr = NULL;
+      char *old_input_ptr = input_ptr;
+      size_t ret = iconv (cd, &input_ptr, &input_len,
+                          &output_ptr, &output_len);
+      if (ret == (size_t) -1)
+        {
+          if (errno != EILSEQ)
+            TEST_COMPARE (errno, E2BIG);
+        }
+
+      if (input_ptr == old_input_ptr)
+        /* Avoid endless loop if stuck on an invalid input character.  */
+        break;
+    }
+  while (input_ptr != NULL);
+
+  /* Test the sticky illegal input bit.  */
+  TEST_VERIFY (__gconv_has_illegal_input (cd));
+
+  TEST_COMPARE_BLOB (expected_output, strlen (expected_output),
+                     output_buf, output_ptr - output_buf);
+
+  TEST_COMPARE (iconv_close (cd), 0);
+}
+
+static int
+do_test (void)
+{
+  static const char charsets[][14] =
+    {
+      "ASCII",
+      "ASCII//IGNORE",
+      "UTF-8",
+      "UTF-8//IGNORE",
+    };
+
+  for (size_t from_idx = 0; from_idx < array_length (charsets); ++from_idx)
+    for (size_t to_idx = 0; to_idx < array_length (charsets); ++to_idx)
+      for (int do_ignore = 0; do_ignore < 2; ++do_ignore)
+        for (int limit = 1; limit < 5; ++limit)
+          for (int skip = 0; skip < 3; ++skip)
+            {
+              const char *expected_output;
+              if (do_ignore || strstr (charsets[to_idx], "//IGNORE") != NULL)
+                expected_output = "ABXY" + skip;
+              else
+                expected_output = "AB" + skip;
+              one_direction (charsets[from_idx], charsets[to_idx], do_ignore,
+                             "AB\xffXY" + skip, expected_output, limit);
+            }
+
+  return 0;
+}
+
+#include <support/test-driver.c>
diff --git a/iconv/tst-iconv_prog-buffer.sh b/iconv/tst-iconv_prog-buffer.sh
index a27107f02b..5ff99a02a3 100644
--- a/iconv/tst-iconv_prog-buffer.sh
+++ b/iconv/tst-iconv_prog-buffer.sh
@@ -150,9 +150,8 @@  expect_exit 1 \
 ! test -s "$tmp/err"
 expect_files abc def
 
-# FIXME: This is not correct, -c should not change the exit status.
 cp "$tmp/out-template" "$tmp/out"
-run_iconv -c -o "$tmp/out" \
+expect_exit 1 run_iconv -c -o "$tmp/out" \
     "$tmp/abc" "$tmp/0xff-wrapped" "$tmp/def" 2>"$tmp/err"
 ! test -s "$tmp/err"
 expect_files abc xy zt def
diff --git a/iconvdata/cp932.c b/iconvdata/cp932.c
index bf7297b114..3def70a70b 100644
--- a/iconvdata/cp932.c
+++ b/iconvdata/cp932.c
@@ -4559,7 +4559,7 @@  static const char from_ucs4_extra[229][2] =
 	if (! ignore_errors_p ())					      \
 	  {								      \
 	    /* This is an illegal character.  */			      \
-	    result = __GCONV_ILLEGAL_INPUT;				      \
+	    result = __gconv_mark_illegal_input (step_data);		      \
 	    break;							      \
 	  }								      \
 									      \
@@ -4599,7 +4599,7 @@  static const char from_ucs4_extra[229][2] =
 	    if (! ignore_errors_p ())					      \
 	      {								      \
 		/* This is an illegal character.  */			      \
-		result = __GCONV_ILLEGAL_INPUT;				      \
+		result = __gconv_mark_illegal_input (step_data);	      \
 		break;							      \
 	      }								      \
 									      \
@@ -4634,7 +4634,7 @@  static const char from_ucs4_extra[229][2] =
 	    if (! ignore_errors_p ())					      \
 	      {								      \
 		/* This is an illegal character.  */			      \
-		result = __GCONV_ILLEGAL_INPUT;				      \
+		result = __gconv_mark_illegal_input (step_data);	      \
 		break;							      \
 	      }								      \
 									      \
diff --git a/iconvdata/euc-jp-ms.c b/iconvdata/euc-jp-ms.c
index d03a0e05bb..96c5325e9d 100644
--- a/iconvdata/euc-jp-ms.c
+++ b/iconvdata/euc-jp-ms.c
@@ -4659,7 +4659,7 @@  static const unsigned char from_ucs4_extra[229][2] =
 	/* This is illegal.  */						      \
 	if (! ignore_errors_p ())					      \
 	  {								      \
-	    result = __GCONV_ILLEGAL_INPUT;				      \
+	    result = __gconv_mark_illegal_input (step_data);		      \
 	    break;							      \
 	  }								      \
 									      \
@@ -4689,7 +4689,7 @@  static const unsigned char from_ucs4_extra[229][2] =
 	    /* This is an illegal character.  */			      \
 	    if (! ignore_errors_p ())					      \
 	      {								      \
-		result = __GCONV_ILLEGAL_INPUT;				      \
+		result = __gconv_mark_illegal_input (step_data);	      \
 		break;							      \
 	      }								      \
 									      \
@@ -4709,7 +4709,7 @@  static const unsigned char from_ucs4_extra[229][2] =
 		if (! ignore_errors_p ())				      \
 		  {							      \
 		    /* This is an illegal character.  */		      \
-		    result = __GCONV_ILLEGAL_INPUT;			      \
+		    result = __gconv_mark_illegal_input (step_data);	      \
 		    break;						      \
 		  }							      \
 	      }								      \
@@ -4820,7 +4820,7 @@  static const unsigned char from_ucs4_extra[229][2] =
 		if (! ignore_errors_p ())				      \
 		  {							      \
 		    /* This is an illegal character.  */		      \
-		    result = __GCONV_ILLEGAL_INPUT;			      \
+		    result = __gconv_mark_illegal_input (step_data);	      \
 		    break;						      \
 		  }							      \
 									      \
diff --git a/iconvdata/gbbig5.c b/iconvdata/gbbig5.c
index f05deeeb1a..b15a2ef932 100644
--- a/iconvdata/gbbig5.c
+++ b/iconvdata/gbbig5.c
@@ -4831,7 +4831,7 @@  const char __from_big5_to_gb2312 [13973][2] =
 	  {								      \
 	    /* We do not have a mapping for this character.		      \
 	       If ignore errors, map it to 0xa1bc - big5 box character */     \
-	    result = __GCONV_ILLEGAL_INPUT;				      \
+	    result = __gconv_mark_illegal_input (step_data);		      \
 	    if (! ignore_errors_p ())					      \
 	      break;							      \
 									      \
@@ -4922,7 +4922,7 @@  const char __from_big5_to_gb2312 [13973][2] =
 	  {								      \
 	    /* We do not have a mapping for this character.		      \
 	       If ignore errors, map it to 0xa1f5 - gb box character */       \
-	    result = __GCONV_ILLEGAL_INPUT;				      \
+	    result = __gconv_mark_illegal_input (step_data);		      \
 	    if (! ignore_errors_p ())					      \
 	      break;							      \
 									      \
diff --git a/iconvdata/ibm1364.c b/iconvdata/ibm1364.c
index 4c37f30e98..d6c8ce7f68 100644
--- a/iconvdata/ibm1364.c
+++ b/iconvdata/ibm1364.c
@@ -179,7 +179,7 @@  enum
 	    /* This is an illegal character.  */			      \
 	    if (! ignore_errors_p ())					      \
 	      {								      \
-		result = __GCONV_ILLEGAL_INPUT;				      \
+		result = __gconv_mark_illegal_input (step_data);	      \
 		break;							      \
 	      }								      \
 	    ++*irreversible;						      \
@@ -219,7 +219,7 @@  enum
 	    /* This is an illegal character.  */			      \
 	    if (! ignore_errors_p ())					      \
 	      {								      \
-		result = __GCONV_ILLEGAL_INPUT;				      \
+		result = __gconv_mark_illegal_input (step_data);	      \
 		break;							      \
 	      }								      \
 	    ++*irreversible;						      \
@@ -300,7 +300,7 @@  enum
 									      \
 	if (! ignore_errors_p ())					      \
 	  {								      \
-	    result = __GCONV_ILLEGAL_INPUT;				      \
+	    result = __gconv_mark_illegal_input (step_data);		      \
 	    break;							      \
 	  }								      \
 	++*irreversible;						      \
@@ -332,7 +332,7 @@  enum
 	    /* This is an illegal character.  */			      \
 	    if (! ignore_errors_p ())					      \
 	      {								      \
-		result = __GCONV_ILLEGAL_INPUT;				      \
+		result = __gconv_mark_illegal_input (step_data);	      \
 		break;							      \
 	      }								      \
 	    ++*irreversible;						      \
diff --git a/iconvdata/iso646.c b/iconvdata/iso646.c
index d96e5f86b9..ba7e23f8ac 100644
--- a/iconvdata/iso646.c
+++ b/iconvdata/iso646.c
@@ -313,7 +313,7 @@  gconv_end (struct __gconv_step *data)
 	  ch = 0xf9;							      \
 	else if (var == JP_OCR_B)					      \
 	  /* Illegal character.  */					      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	else if (var == YU)						      \
 	  ch = 0x17e;							      \
 	else if (var == HU)						      \
@@ -387,7 +387,7 @@  gconv_end (struct __gconv_step *data)
 	  ch = 0xec;							      \
 	else if (var == JP_OCR_B)					      \
 	  /* Illegal character.  */					      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	else if (var == YU)						      \
 	  ch = 0x10d;							      \
 	else if (var == HU)						      \
@@ -403,7 +403,7 @@  gconv_end (struct __gconv_step *data)
 	break;								      \
       case 0x80 ... 0xff:						      \
 	/* Illegal character.  */					      \
-	failure = __GCONV_ILLEGAL_INPUT;				      \
+	failure = __gconv_mark_illegal_input (step_data);		      \
 	break;								      \
       }									      \
 									      \
@@ -440,17 +440,17 @@  gconv_end (struct __gconv_step *data)
       case 0x23:							      \
 	if (var == GB || var == ES || var == IT || var == FR || var == FR1    \
 	    || var == NO2)						      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	break;								      \
       case 0x24:							      \
 	if (var == CN || var == HU || var == CU || var == SE || var == SE2)   \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	break;								      \
       case 0x40:							      \
 	if (var == CA || var == CA2 || var == DE || var == ES || var == ES2   \
 	    || var == IT || var == YU || var == HU || var == FR || var == FR1 \
 	    || var == PT || var == PT2 || var == SE2)			      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	break;								      \
       case 0x5b:							      \
 	if (var == CA || var == CA2 || var == DE || var == DK || var == ES    \
@@ -458,7 +458,7 @@  gconv_end (struct __gconv_step *data)
 	    || var == HU || var == FR || var == FR1 || var == NO	      \
 	    || var == NO2 || var == PT || var == PT2 || var == SE	      \
 	    || var == SE2)						      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	else if (var == CU)						      \
 	  ch = 0x7d;							      \
 	break;								      \
@@ -468,7 +468,7 @@  gconv_end (struct __gconv_step *data)
 	    || var == YU || var == KR || var == HU || var == CU || var == FR  \
 	    || var == FR1 || var == NO || var == NO2 || var == PT	      \
 	    || var == PT2 || var == SE || var == SE2)			      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	break;								      \
       case 0x5d:							      \
 	if (var == CA || var == CA2 || var == DE || var == DK || var == ES    \
@@ -476,17 +476,17 @@  gconv_end (struct __gconv_step *data)
 	    || var == HU || var == FR || var == FR1 || var == NO	      \
 	    || var == NO2 || var == PT || var == PT2 || var == SE	      \
 	    || var == SE2)						      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	break;								      \
       case 0x5e:							      \
 	if (var == CA || var == CA2 || var == ES2 || var == YU || var == CU   \
 	    || var == SE2)						      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	break;								      \
       case 0x60:							      \
 	if (var == CA || var == CA2 || var == IT || var == JP_OCR_B	      \
 	    || var == YU || var == HU || var == FR || var == SE2)	      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	break;								      \
       case 0x7b:							      \
 	if (var == CA || var == CA2 || var == DE || var == DK || var == ES    \
@@ -494,14 +494,14 @@  gconv_end (struct __gconv_step *data)
 	    || var == CU || var == FR || var == FR1 || var == NO	      \
 	    || var == NO2 || var == PT || var == PT2 || var == SE	      \
 	    || var == SE2)						      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	break;								      \
       case 0x7c:							      \
 	if (var == CA || var == CA2 || var == DE || var == DK || var == ES    \
 	    || var == ES2 || var == IT || var == YU || var == HU || var == CU \
 	    || var == FR || var == FR1 || var == NO || var == PT	      \
 	    || var == PT2 || var == SE || var == SE2)			      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	else if (var == NO2)						      \
 	  ch = 0x7e;							      \
 	break;								      \
@@ -510,7 +510,7 @@  gconv_end (struct __gconv_step *data)
 	    || var == ES2 || var == IT || var == YU || var == HU || var == CU \
 	    || var == FR || var == FR1 || var == NO || var == NO2	      \
 	    || var == PT || var == PT2 || var == SE || var == SE2)	      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	break;								      \
       case 0x7e:							      \
 	if (var == GB || var == CA || var == CA2 || var == DE || var == ES2   \
@@ -518,21 +518,21 @@  gconv_end (struct __gconv_step *data)
 	    || var == YU || var == HU || var == CU || var == FR || var == FR1 \
 	    || var == NO || var == NO2 || var == PT || var == SE	      \
 	    || var == SE2)						      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	break;								      \
       case 0xa1:							      \
 	if (var != ES && var != ES2 && var != CU)			      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x5b;							      \
 	break;								      \
       case 0xa3:							      \
 	if (var != GB && var != ES && var != IT && var != FR && var != FR1)   \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x23;							      \
 	break;								      \
       case 0xa4:							      \
 	if (var != HU && var != CU && var != SE && var != SE2)		      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x24;							      \
 	break;								      \
       case 0xa5:							      \
@@ -541,7 +541,7 @@  gconv_end (struct __gconv_step *data)
 	else if (var == JP || var == JP_OCR_B)				      \
 	  ch = 0x5c;							      \
 	else								      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	break;								      \
       case 0xa7:							      \
 	if (var == DE || var == ES || var == IT || var == PT)		      \
@@ -551,11 +551,11 @@  gconv_end (struct __gconv_step *data)
 	else if (var == NO2)						      \
 	  ch = 0x23;							      \
 	else								      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	break;								      \
       case 0xa8:							      \
 	if (var != ES2 && var != CU && var != FR && var != FR1)		      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x7e;							      \
 	break;								      \
       case 0xb0:							      \
@@ -566,7 +566,7 @@  gconv_end (struct __gconv_step *data)
 	else if (var == PT)						      \
 	  ch = 0x7e;							      \
 	else								      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	break;								      \
       case 0xb4:							      \
 	if (var == ES2 || var == CU)					      \
@@ -574,11 +574,11 @@  gconv_end (struct __gconv_step *data)
 	else if (var == PT2)						      \
 	  ch = 0x40;							      \
 	else								      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	break;								      \
       case 0xb5:							      \
 	if (var != FR)							      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x60;							      \
 	break;								      \
       case 0xbf:							      \
@@ -587,31 +587,31 @@  gconv_end (struct __gconv_step *data)
 	else if (var == ES2 || var == CU)				      \
 	  ch = 0x5e;							      \
 	else								      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	break;								      \
       case 0xc1:							      \
 	if (var != HU)							      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x40;							      \
 	break;								      \
       case 0xc3:							      \
 	if (var != PT && var != PT2)					      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x5b;							      \
 	break;								      \
       case 0xc4:							      \
 	if (var != DE && var != SE && var != SE2)			      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x5b;							      \
 	break;								      \
       case 0xc5:							      \
 	if (var != DK && var != NO && var != NO2 && var != SE && var != SE2)  \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x5d;							      \
 	break;								      \
       case 0xc6:							      \
 	if (var != DK && var != NO && var != NO2)			      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x5b;							      \
 	break;								      \
       case 0xc7:							      \
@@ -620,7 +620,7 @@  gconv_end (struct __gconv_step *data)
 	else if (var == PT || var == PT2)				      \
 	  ch = 0x5c;							      \
 	else								      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	break;								      \
       case 0xc9:							      \
 	if (var == CA2)							      \
@@ -630,26 +630,26 @@  gconv_end (struct __gconv_step *data)
 	else if (var == SE2)						      \
 	  ch = 0x40;							      \
 	else								      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	break;								      \
       case 0xd1:							      \
 	if (var != ES && var != ES2 && var != CU)			      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x5c;							      \
 	break;								      \
       case 0xd5:							      \
 	if (var != PT && var != PT2)					      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x5d;							      \
 	break;								      \
       case 0xd6:							      \
 	if (var != DE && var != HU && var != SE && var != SE2)		      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x5c;							      \
 	break;								      \
       case 0xd8:							      \
 	if (var != DK && var != NO && var != NO2)			      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x5c;							      \
 	break;								      \
       case 0xdc:							      \
@@ -658,11 +658,11 @@  gconv_end (struct __gconv_step *data)
 	else if (var == SE2)						      \
 	  ch = 0x5e;							      \
 	else								      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	break;								      \
       case 0xdf:							      \
 	if (var != DE)							      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x7e;							      \
 	break;								      \
       case 0xe0:							      \
@@ -671,36 +671,36 @@  gconv_end (struct __gconv_step *data)
 	else if (var == IT)						      \
 	  ch = 0x7b;							      \
 	else								      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	break;								      \
       case 0xe1:							      \
 	if (var != HU)							      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x60;							      \
 	break;								      \
       case 0xe2:							      \
 	if (var != CA && var != CA2)					      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x5b;							      \
 	break;								      \
       case 0xe3:							      \
 	if (var != PT && var != PT2)					      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x7b;							      \
 	break;								      \
       case 0xe4:							      \
 	if (var != DE && var != SE && var != SE2)			      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x7b;							      \
 	break;								      \
       case 0xe5:							      \
 	if (var != DK && var != NO && var != NO2 && var != SE && var != SE2)  \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x7d;							      \
 	break;								      \
       case 0xe6:							      \
 	if (var != DK && var != NO && var != NO2)			      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x7b;							      \
 	break;								      \
       case 0xe7:							      \
@@ -711,11 +711,11 @@  gconv_end (struct __gconv_step *data)
 	else if (var == PT || var == PT2)				      \
 	  ch = 0x7c;							      \
 	else								      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	break;								      \
       case 0xe8:							      \
 	if (var != CA && var != CA2 && var != IT && var != FR && var != FR1)  \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x7d;							      \
 	break;								      \
       case 0xe9:							      \
@@ -726,51 +726,51 @@  gconv_end (struct __gconv_step *data)
 	else if (var == SE2)						      \
 	  ch = 0x60;							      \
 	else								      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	break;								      \
       case 0xea:							      \
 	if (var != CA && var != CA2)					      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x5d;							      \
 	break;								      \
       case 0xec:							      \
 	if (var != IT)							      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x7e;							      \
 	break;								      \
       case 0xee:							      \
 	if (var != CA)							      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x5e;							      \
 	break;								      \
       case 0xf1:							      \
 	if (var != ES && var != ES2 && var != CU)			      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x7c;							      \
 	break;								      \
       case 0xf2:							      \
 	if (var != IT)							      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x7c;							      \
 	break;								      \
       case 0xf4:							      \
 	if (var != CA && var != CA2)					      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x60;							      \
 	break;								      \
       case 0xf5:							      \
 	if (var != PT && var != PT2)					      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x7d;							      \
 	break;								      \
       case 0xf6:							      \
 	if (var != DE && var != HU && var != SE && var != SE2)		      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x7c;							      \
 	break;								      \
       case 0xf8:							      \
 	if (var != DK && var != NO && var != NO2)			      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x7c;							      \
 	break;								      \
       case 0xf9:							      \
@@ -779,11 +779,11 @@  gconv_end (struct __gconv_step *data)
 	else if (var == IT)						      \
 	  ch = 0x60;							      \
 	else								      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	break;								      \
       case 0xfb:							      \
 	if (var != CA && var != CA2)					      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x7e;							      \
 	break;								      \
       case 0xfc:							      \
@@ -792,93 +792,93 @@  gconv_end (struct __gconv_step *data)
 	else if (var == SE2)						      \
 	  ch = 0x7e;							      \
 	else								      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	break;								      \
       case 0x160:							      \
 	if (var != YU)							      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x5b;							      \
 	break;								      \
       case 0x106:							      \
 	if (var != YU)							      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x5d;							      \
 	break;								      \
       case 0x107:							      \
 	if (var != YU)							      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x7d;							      \
 	break;								      \
       case 0x10c:							      \
 	if (var != YU)							      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x5e;							      \
 	break;								      \
       case 0x10d:							      \
 	if (var != YU)							      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x7e;							      \
 	break;								      \
       case 0x110:							      \
 	if (var != YU)							      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x5c;							      \
 	break;								      \
       case 0x111:							      \
 	if (var != YU)							      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x7c;							      \
 	break;								      \
       case 0x161:							      \
 	if (var != YU)							      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x7b;							      \
 	break;								      \
       case 0x17d:							      \
 	if (var != YU)							      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x40;							      \
 	break;								      \
       case 0x17e:							      \
 	if (var != YU)							      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x60;							      \
 	break;								      \
       case 0x2dd:							      \
 	if (var != HU)							      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x7e;							      \
 	break;								      \
       case 0x2022:							      \
 	if (var != ES2)							      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x40;							      \
 	break;								      \
       case 0x203e:							      \
 	if (var != GB && var != CN && var != JP && var != NO && var != SE)    \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x7e;							      \
 	break;								      \
       case 0x20a9:							      \
 	if (var != KR)							      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x5c;							      \
 	break;								      \
       case 0x2329:							      \
 	if (var != JP_OCR_B)						      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x5b;							      \
 	break;								      \
       case 0x232a:							      \
 	if (var != JP_OCR_B)						      \
-	  failure = __GCONV_ILLEGAL_INPUT;				      \
+	  failure = __gconv_mark_illegal_input (step_data);		      \
 	ch = 0x5d;							      \
 	break;								      \
       default:								      \
 	if (__glibc_unlikely (ch > 0x7f))				      \
 	  {								      \
 	    UNICODE_TAG_HANDLER (ch, 4);				      \
-	    failure = __GCONV_ILLEGAL_INPUT;				      \
+	    failure = __gconv_mark_illegal_input (step_data);		      \
 	  }								      \
 	break;								      \
       }									      \
diff --git a/iconvdata/unicode.c b/iconvdata/unicode.c
index d69c9887a1..79bb9886e5 100644
--- a/iconvdata/unicode.c
+++ b/iconvdata/unicode.c
@@ -163,7 +163,7 @@  gconv_end (struct __gconv_step *data)
 	   surrogates pass through, attackers could make a security	      \
 	   hole exploit by synthesizing any desired plane 1-16		      \
 	   character.  */						      \
-	result = __GCONV_ILLEGAL_INPUT;					      \
+	result = __gconv_mark_illegal_input (step_data);		      \
 	if (! ignore_errors_p ())					      \
 	  break;							      \
 	inptr += 4;							      \
diff --git a/iconvdata/utf-16.c b/iconvdata/utf-16.c
index a869353f20..9d9fd2a2a3 100644
--- a/iconvdata/utf-16.c
+++ b/iconvdata/utf-16.c
@@ -206,7 +206,7 @@  gconv_end (struct __gconv_step *data)
 	   We must catch this.  If we let surrogates pass through,	      \
 	   attackers could make a security hole exploit by		      \
 	   synthesizing any desired plane 1-16 character.  */		      \
-	result = __GCONV_ILLEGAL_INPUT;					      \
+	result = __gconv_mark_illegal_input (step_data);		      \
 	if (! ignore_errors_p ())					      \
 	  break;							      \
 	inptr += 4;							      \
diff --git a/iconvdata/utf-32.c b/iconvdata/utf-32.c
index 5693b48975..139eefb6d8 100644
--- a/iconvdata/utf-32.c
+++ b/iconvdata/utf-32.c
@@ -207,7 +207,7 @@  gconv_end (struct __gconv_step *data)
 	   We must catch this.  If we let surrogates pass through,	      \
 	   attackers could make a security hole exploit by		      \
 	   generating "irregular UTF-32" sequences.  */			      \
-	result = __GCONV_ILLEGAL_INPUT;					      \
+	result = __gconv_mark_illegal_input (step_data);		      \
 	if (! ignore_errors_p ())					      \
 	  break;							      \
 	inptr += 4;							      \