Fixes for memory access violations exposed by fuzzinf various binaries.

	PR binutils/17512
	* dwarf.c (get_encoded_value): Check for an encoded size of 0.
	(display_debug_lines_raw): Check for an invalid line range value.
	(display_debug_frames): Check for corrupt augmentation data.

	* coffgen.c (coff_get_normalized_symtab): Check for an excessive
	number of auxillary entries.
	* ieee.c (next_byte): Convert to a function.  Return FALSE if the
	next byte is beyond the end of the buffer.
	(parse_int): Test the return value of next_byte.
	(parse_expression): Convert to boolean.  Return FALSE if the
	parsing failed.  Test the return value of next_byte.
	(ieee_seek): Convert to a function.  Return FALSE if the seek goes
	beyond the end of the buffer.
	(ieee_slurp_external_symbols): Test the return value of ieee_seek
	and next_byte.
	(ieee_slurp_sections): Convert to boolean.  Return FALSE if the
	operation failed.  Test the return value of ieee_seek and
	next_byte.
	(ieee_archive_p): Test the return value of ieee_seek and
	next_byte.
	(do_one): Likewise.
	(ieee_slurp_section_data): Likewise.
	(ieee_object_p): Likewise.  Store the size of the buffer in the
	total_amt field in the header.
	* libieee.h (common_header_type): Add amt field.
	* mach-o.c (bfd_mach_o_canonicalize_one_reloc): Check that the
	reloc's value is within range.
	(bfd_mach_o_read_symtab_symbols): Nullify the symbols field if the
	operation fails.
	* pei-x86_64.c (pex64_xdata_print_uwd_codes): Replace abort with
	an error message.
	(pex64_dump_xdata): Check for buffer overflows.
	* versados.c (process_otr): Check that the section exists before
	taking its size.
	(versados_object_p): Make sure that enough data was read for the
	header to be checked.
	* vms-alpha.c (vms_get_remaining_object_record): Change
	read_so_far parameter to an unsigned int.  Check that the amount
	read is in range.

1 files changed, 176 insertions, 85 deletions

diff --git a/bfd/ieee.c b/bfd/ieee.c
index 313834e7f7..70ce4c5cc0 100644
--- a/bfd/ieee.c
+++ b/bfd/ieee.c
@@ -170,9 +170,16 @@ ieee_write_id (bfd *abfd, const char *id)
    standard requires.  */
 
 #define this_byte(ieee)           *((ieee)->input_p)
-#define next_byte(ieee)            ((ieee)->input_p++)
 #define this_byte_and_next(ieee) (*((ieee)->input_p++))
 
+static bfd_boolean
+next_byte (common_header_type * ieee)
+{
+  ieee->input_p++;
+
+  return ieee->input_p < ieee->last_byte;
+}
+
 static unsigned short
 read_2bytes (common_header_type *ieee)
 {
@@ -348,15 +355,15 @@ parse_int (common_header_type *ieee, bfd_vma *value_ptr)
   if (value >= 0 && value <= 127)
     {
       *value_ptr = value;
-      next_byte (ieee);
-      return TRUE;
+      return next_byte (ieee);
     }
   else if (value >= 0x80 && value <= 0x88)
     {
       unsigned int count = value & 0xf;
 
       result = 0;
-      next_byte (ieee);
+      if (! next_byte (ieee))
+	return FALSE;
       while (count)
 	{
 	  result = (result << 8) | this_byte_and_next (ieee);
@@ -496,7 +503,7 @@ static reloc_howto_type rel8_howto =
 
 static ieee_symbol_index_type NOSYMBOL = {0, 0};
 
-static void
+static bfd_boolean
 parse_expression (ieee_data_type *ieee,
 		  bfd_vma *value,
 		  ieee_symbol_index_type *symbol,
@@ -529,68 +536,83 @@ parse_expression (ieee_data_type *ieee,
 	  {
 	    int section_n;
 
-	    next_byte (&(ieee->h));
+	    if (! next_byte (&(ieee->h)))
+	      return FALSE;
 	    *pcrel = TRUE;
 	    section_n = must_parse_int (&(ieee->h));
 	    (void) section_n;
 	    PUSH (NOSYMBOL, bfd_abs_section_ptr, 0);
 	    break;
 	  }
+
 	case ieee_variable_L_enum:
 	  /* L variable  address of section N.  */
-	  next_byte (&(ieee->h));
+	  if (! next_byte (&(ieee->h)))
+	    return FALSE;
 	  PUSH (NOSYMBOL, ieee->section_table[must_parse_int (&(ieee->h))], 0);
 	  break;
+
 	case ieee_variable_R_enum:
 	  /* R variable, logical address of section module.  */
 	  /* FIXME, this should be different to L.  */
-	  next_byte (&(ieee->h));
+	  if (! next_byte (&(ieee->h)))
+	    return FALSE;
 	  PUSH (NOSYMBOL, ieee->section_table[must_parse_int (&(ieee->h))], 0);
 	  break;
+
 	case ieee_variable_S_enum:
 	  /* S variable, size in MAUS of section module.  */
-	  next_byte (&(ieee->h));
+	  if (! next_byte (&(ieee->h)))
+	    return FALSE;
 	  PUSH (NOSYMBOL,
 		0,
 		ieee->section_table[must_parse_int (&(ieee->h))]->size);
 	  break;
+
 	case ieee_variable_I_enum:
 	  /* Push the address of variable n.  */
 	  {
 	    ieee_symbol_index_type sy;
 
-	    next_byte (&(ieee->h));
+	    if (! next_byte (&(ieee->h)))
+	      return FALSE;
 	    sy.index = (int) must_parse_int (&(ieee->h));
 	    sy.letter = 'I';
 
 	    PUSH (sy, bfd_abs_section_ptr, 0);
 	  }
 	  break;
+
 	case ieee_variable_X_enum:
 	  /* Push the address of external variable n.  */
 	  {
 	    ieee_symbol_index_type sy;
 
-	    next_byte (&(ieee->h));
+	    if (! next_byte (&(ieee->h)))
+	      return FALSE;
+
 	    sy.index = (int) (must_parse_int (&(ieee->h)));
 	    sy.letter = 'X';
 
 	    PUSH (sy, bfd_und_section_ptr, 0);
 	  }
 	  break;
+
 	case ieee_function_minus_enum:
 	  {
 	    bfd_vma value1, value2;
 	    asection *section1, *section_dummy;
 	    ieee_symbol_index_type sy;
 
-	    next_byte (&(ieee->h));
+	    if (! next_byte (&(ieee->h)))
+	      return FALSE;
 
 	    POP (sy, section1, value1);
 	    POP (sy, section_dummy, value2);
 	    PUSH (sy, section1 ? section1 : section_dummy, value2 - value1);
 	  }
 	  break;
+
 	case ieee_function_plus_enum:
 	  {
 	    bfd_vma value1, value2;
@@ -599,7 +621,8 @@ parse_expression (ieee_data_type *ieee,
 	    ieee_symbol_index_type sy1;
 	    ieee_symbol_index_type sy2;
 
-	    next_byte (&(ieee->h));
+	    if (! next_byte (&(ieee->h)))
+	      return FALSE;
 
 	    POP (sy1, section1, value1);
 	    POP (sy2, section2, value2);
@@ -608,6 +631,7 @@ parse_expression (ieee_data_type *ieee,
 		  value1 + value2);
 	  }
 	  break;
+
 	default:
 	  {
 	    bfd_vma va;
@@ -644,17 +668,9 @@ parse_expression (ieee_data_type *ieee,
   POP (*symbol, dummy, *value);
   if (section)
     *section = dummy;
-}
-
 
-#define ieee_seek(ieee, offset) \
-  do								\
-    {								\
-      ieee->h.input_p = ieee->h.first_byte + offset;		\
-      ieee->h.last_byte = (ieee->h.first_byte			\
-			   + ieee_part_after (ieee, offset));	\
-    }								\
-  while (0)
+  return TRUE;
+}
 
 #define ieee_pos(ieee) \
   (ieee->h.input_p - ieee->h.first_byte)
@@ -676,6 +692,22 @@ ieee_part_after (ieee_data_type *ieee, file_ptr here)
   return after;
 }
 
+static bfd_boolean
+ieee_seek (ieee_data_type * ieee, file_ptr offset)
+{
+  /* PR 17512: file:  017-1157-0.004.  */
+  if (offset < 0 || (bfd_size_type) offset >= ieee->h.total_amt)
+    {
+      ieee->h.input_p = ieee->h.first_byte + ieee->h.total_amt;
+      ieee->h.last_byte = ieee->h.input_p;
+      return FALSE;
+    }
+
+  ieee->h.input_p = ieee->h.first_byte + offset;
+  ieee->h.last_byte = (ieee->h.first_byte + ieee_part_after (ieee, offset));
+  return TRUE;
+}
+
 static unsigned int last_index;
 static char last_type;		/* Is the index for an X or a D.  */
 
@@ -730,14 +762,16 @@ ieee_slurp_external_symbols (bfd *abfd)
   last_index = 0xffffff;
   ieee->symbol_table_full = TRUE;
 
-  ieee_seek (ieee, offset);
+  if (! ieee_seek (ieee, offset))
+    return FALSE;
 
   while (loop)
     {
       switch (this_byte (&(ieee->h)))
 	{
 	case ieee_nn_record:
-	  next_byte (&(ieee->h));
+	  if (! next_byte (&(ieee->h)))
+	    return FALSE;
 
 	  symbol = get_symbol (abfd, ieee, symbol, &symbol_count,
 			       & prev_symbols_ptr,
@@ -750,8 +784,10 @@ ieee_slurp_external_symbols (bfd *abfd)
 	  symbol->symbol.udata.p = NULL;
 	  symbol->symbol.flags = BSF_NO_FLAGS;
 	  break;
+
 	case ieee_external_symbol_enum:
-	  next_byte (&(ieee->h));
+	  if (! next_byte (&(ieee->h)))
+	    return FALSE;
 
 	  symbol = get_symbol (abfd, ieee, symbol, &symbol_count,
 			       &prev_symbols_ptr,
@@ -842,6 +878,7 @@ ieee_slurp_external_symbols (bfd *abfd)
 	      }
 	  }
 	  break;
+
 	case ieee_value_record_enum >> 8:
 	  {
 	    unsigned int symbol_name_index;
@@ -849,17 +886,20 @@ ieee_slurp_external_symbols (bfd *abfd)
 	    bfd_boolean pcrel_ignore;
 	    unsigned int extra;
 
-	    next_byte (&(ieee->h));
-	    next_byte (&(ieee->h));
+	    if (! next_byte (&(ieee->h)))
+	      return FALSE;
+	    if (! next_byte (&(ieee->h)))
+	      return FALSE;
 
 	    symbol_name_index = must_parse_int (&(ieee->h));
 	    (void) symbol_name_index;
-	    parse_expression (ieee,
-			      &symbol->symbol.value,
-			      &symbol_ignore,
-			      &pcrel_ignore,
-			      &extra,
-			      &symbol->symbol.section);
+	    if (! parse_expression (ieee,
+				    &symbol->symbol.value,
+				    &symbol_ignore,
+				    &pcrel_ignore,
+				    &extra,
+				    &symbol->symbol.section))
+	      return FALSE;
 
 	    /* Fully linked IEEE-695 files tend to give every symbol
                an absolute value.  Try to convert that back into a
@@ -892,7 +932,9 @@ ieee_slurp_external_symbols (bfd *abfd)
 	    bfd_vma size;
 	    bfd_vma value;
 
-	    next_byte (&(ieee->h));
+	    if (! next_byte (&(ieee->h)))
+	      return FALSE;
+
 	    /* Throw away the external reference index.  */
 	    (void) must_parse_int (&(ieee->h));
 	    /* Fetch the default size if not resolved.  */
@@ -907,7 +949,8 @@ ieee_slurp_external_symbols (bfd *abfd)
 	  break;
 
 	case ieee_external_reference_enum:
-	  next_byte (&(ieee->h));
+	  if (! next_byte (&(ieee->h)))
+	    return FALSE;
 
 	  symbol = get_symbol (abfd, ieee, symbol, &symbol_count,
 			       &prev_reference_ptr,
@@ -1092,7 +1135,7 @@ get_section_entry (bfd *abfd, ieee_data_type *ieee, unsigned int sindex)
   return ieee->section_table[sindex];
 }
 
-static void
+static bfd_boolean
 ieee_slurp_sections (bfd *abfd)
 {
   ieee_data_type *ieee = IEEE_DATA (abfd);
@@ -1103,7 +1146,9 @@ ieee_slurp_sections (bfd *abfd)
     {
       bfd_byte section_type[3];
 
-      ieee_seek (ieee, offset);
+      if (! ieee_seek (ieee, offset))
+	return FALSE;
+
       while (TRUE)
 	{
 	  switch (this_byte (&(ieee->h)))
@@ -1113,7 +1158,8 @@ ieee_slurp_sections (bfd *abfd)
 		asection *section;
 		unsigned int section_index;
 
-		next_byte (&(ieee->h));
+		if (! next_byte (&(ieee->h)))
+		  return FALSE;
 		section_index = must_parse_int (&(ieee->h));
 
 		section = get_section_entry (abfd, ieee, section_index);
@@ -1132,22 +1178,26 @@ ieee_slurp_sections (bfd *abfd)
 		      {
 			/* AS Absolute section attributes.  */
 		      case 0xD3:
-			next_byte (&(ieee->h));
+			if (! next_byte (&(ieee->h)))
+			  return FALSE;
 			section_type[2] = this_byte (&(ieee->h));
 			switch (section_type[2])
 			  {
 			  case 0xD0:
 			    /* Normal code.  */
-			    next_byte (&(ieee->h));
+			    if (! next_byte (&(ieee->h)))
+			      return FALSE;
 			    section->flags |= SEC_CODE;
 			    break;
 			  case 0xC4:
 			    /* Normal data.  */
-			    next_byte (&(ieee->h));
+			    if (! next_byte (&(ieee->h)))
+			      return FALSE;
 			    section->flags |= SEC_DATA;
 			    break;
 			  case 0xD2:
-			    next_byte (&(ieee->h));
+			    if (! next_byte (&(ieee->h)))
+			      return FALSE;
 			    /* Normal rom data.  */
 			    section->flags |= SEC_ROM | SEC_DATA;
 			    break;
@@ -1164,15 +1214,18 @@ ieee_slurp_sections (bfd *abfd)
 		    switch (section_type[1])
 		      {
 		      case 0xD0:	/* Normal code (CP).  */
-			next_byte (&(ieee->h));
+			if (! next_byte (&(ieee->h)))
+			  return FALSE;
 			section->flags |= SEC_CODE;
 			break;
 		      case 0xC4:	/* Normal data (CD).  */
-			next_byte (&(ieee->h));
+			if (! next_byte (&(ieee->h)))
+			  return FALSE;
 			section->flags |= SEC_DATA;
 			break;
 		      case 0xD2:	/* Normal rom data (CR).  */
-			next_byte (&(ieee->h));
+			if (! next_byte (&(ieee->h)))
+			  return FALSE;
 			section->flags |= SEC_ROM | SEC_DATA;
 			break;
 		      default:
@@ -1201,7 +1254,8 @@ ieee_slurp_sections (bfd *abfd)
 		bfd_vma value;
 		asection *section;
 
-		next_byte (&(ieee->h));
+		if (! next_byte (&(ieee->h)))
+		  return FALSE;
 		section_index = must_parse_int (&ieee->h);
 		section = get_section_entry (abfd, ieee, section_index);
 		if (section_index > ieee->section_count)
@@ -1251,15 +1305,17 @@ ieee_slurp_sections (bfd *abfd)
 		    (void) must_parse_int (&(ieee->h));
 		    break;
 		  default:
-		    return;
+		    return TRUE;
 		  }
 	      }
 	      break;
 	    default:
-	      return;
+	      return TRUE;
 	    }
 	}
     }
+
+  return TRUE;
 }
 
 /* Make a section for the debugging information, if any.  We don't try
@@ -1323,7 +1379,8 @@ ieee_archive_p (bfd *abfd)
   if (this_byte (&(ieee->h)) != Module_Beginning)
     goto got_wrong_format_error;
 
-  next_byte (&(ieee->h));
+  (void) next_byte (&(ieee->h));
+
   library = read_id (&(ieee->h));
   if (strcmp (library, "LIBRARY") != 0)
     goto got_wrong_format_error;
@@ -1334,7 +1391,7 @@ ieee_archive_p (bfd *abfd)
   ieee->element_count = 0;
   ieee->element_index = 0;
 
-  next_byte (&(ieee->h));	/* Drop the ad part.  */
+  (void) next_byte (&(ieee->h));	/* Drop the ad part.  */
   must_parse_int (&(ieee->h));	/* And the two dummy numbers.  */
   must_parse_int (&(ieee->h));
 
@@ -1407,8 +1464,9 @@ ieee_archive_p (bfd *abfd)
       ieee->h.first_byte = buffer;
       ieee->h.input_p = buffer;
 
-      next_byte (&(ieee->h));		/* Drop F8.  */
-      next_byte (&(ieee->h));		/* Drop 14.  */
+      (void) next_byte (&(ieee->h));	/* Drop F8.  */
+      if (! next_byte (&(ieee->h)))	/* Drop 14.  */
+	goto error_return;
       must_parse_int (&(ieee->h));	/* Drop size of block.  */
 
       if (must_parse_int (&(ieee->h)) != 0)
@@ -1467,7 +1525,8 @@ do_one (ieee_data_type *ieee,
 	unsigned int number_of_maus;
 	unsigned int i;
 
-	next_byte (&(ieee->h));
+	if (! next_byte (&(ieee->h)))
+	  return FALSE;
 	number_of_maus = must_parse_int (&(ieee->h));
 
 	for (i = 0; i < number_of_maus; i++)
@@ -1482,7 +1541,8 @@ do_one (ieee_data_type *ieee,
       {
 	bfd_boolean loop = TRUE;
 
-	next_byte (&(ieee->h));
+	if (! next_byte (&(ieee->h)))
+	  return FALSE;
 	while (loop)
 	  {
 	    switch (this_byte (&(ieee->h)))
@@ -1505,13 +1565,16 @@ do_one (ieee_data_type *ieee,
 		  *(current_map->reloc_tail_ptr) = r;
 		  current_map->reloc_tail_ptr = &r->next;
 		  r->next = (ieee_reloc_type *) NULL;
-		  next_byte (&(ieee->h));
-/*			    abort();*/
+		  if (! next_byte (&(ieee->h)))
+		    return FALSE;
+
 		  r->relent.sym_ptr_ptr = 0;
-		  parse_expression (ieee,
-				    &r->relent.addend,
-				    &r->symbol,
-				    &pcrel, &extra, &section);
+		  if (! parse_expression (ieee,
+					  &r->relent.addend,
+					  &r->symbol,
+					  &pcrel, &extra, &section))
+		    return FALSE;
+
 		  r->relent.address = current_map->pc;
 		  s->flags |= SEC_RELOC;
 		  s->owner->flags |= HAS_RELOC;
@@ -1521,7 +1584,8 @@ do_one (ieee_data_type *ieee,
 
 		  if (this_byte (&(ieee->h)) == (int) ieee_comma)
 		    {
-		      next_byte (&(ieee->h));
+		      if (! next_byte (&(ieee->h)))
+			return FALSE;
 		      /* Fetch number of bytes to pad.  */
 		      extra = must_parse_int (&(ieee->h));
 		    };
@@ -1529,13 +1593,16 @@ do_one (ieee_data_type *ieee,
 		  switch (this_byte (&(ieee->h)))
 		    {
 		    case ieee_function_signed_close_b_enum:
-		      next_byte (&(ieee->h));
+		      if (! next_byte (&(ieee->h)))
+			return FALSE;
 		      break;
 		    case ieee_function_unsigned_close_b_enum:
-		      next_byte (&(ieee->h));
+		      if (! next_byte (&(ieee->h)))
+			return FALSE;
 		      break;
 		    case ieee_function_either_close_b_enum:
-		      next_byte (&(ieee->h));
+		      if (! next_byte (&(ieee->h)))
+			return FALSE;
 		      break;
 		    default:
 		      break;
@@ -1634,7 +1701,8 @@ do_one (ieee_data_type *ieee,
 		      for (i = 0; i < this_size; i++)
 			{
 			  location_ptr[current_map->pc++] = this_byte (&(ieee->h));
-			  next_byte (&(ieee->h));
+			  if (! next_byte (&(ieee->h)))
+			    return FALSE;
 			}
 		    }
 		  else
@@ -1667,7 +1735,9 @@ ieee_slurp_section_data (bfd *abfd)
   if (ieee->read_data)
     return TRUE;
   ieee->read_data = TRUE;
-  ieee_seek (ieee, ieee->w.r.data_part);
+
+  if (! ieee_seek (ieee, ieee->w.r.data_part))
+    return FALSE;
 
   /* Allocate enough space for all the section contents.  */
   for (s = abfd->sections; s != (asection *) NULL; s = s->next)
@@ -1693,7 +1763,8 @@ ieee_slurp_section_data (bfd *abfd)
 	  return TRUE;
 
 	case ieee_set_current_section_enum:
-	  next_byte (&(ieee->h));
+	  if (! next_byte (&(ieee->h)))
+	    return FALSE;
 	  section_number = must_parse_int (&(ieee->h));
 	  s = ieee->section_table[section_number];
 	  s->flags |= SEC_LOAD | SEC_HAS_CONTENTS;
@@ -1706,7 +1777,8 @@ ieee_slurp_section_data (bfd *abfd)
 	  break;
 
 	case ieee_e2_first_byte_enum:
-	  next_byte (&(ieee->h));
+	  if (! next_byte (&(ieee->h)))
+	    return FALSE;
 	  switch (this_byte (&(ieee->h)))
 	    {
 	    case ieee_set_current_pc_enum & 0xff:
@@ -1716,21 +1788,28 @@ ieee_slurp_section_data (bfd *abfd)
 		unsigned int extra;
 		bfd_boolean pcrel;
 
-		next_byte (&(ieee->h));
+		if (! next_byte (&(ieee->h)))
+		  return FALSE;
 		must_parse_int (&(ieee->h));	/* Throw away section #.  */
-		parse_expression (ieee, &value,
-				  &symbol,
-				  &pcrel, &extra,
-				  0);
+		if (! parse_expression (ieee, &value,
+					&symbol,
+					&pcrel, &extra,
+					0))
+		  return FALSE;
+
 		current_map->pc = value;
 		BFD_ASSERT ((unsigned) (value - s->vma) <= s->size);
 	      }
 	      break;
 
 	    case ieee_value_starting_address_enum & 0xff:
-	      next_byte (&(ieee->h));
+	      if (! next_byte (&(ieee->h)))
+		return FALSE;
 	      if (this_byte (&(ieee->h)) == ieee_function_either_open_b_enum)
-		next_byte (&(ieee->h));
+		{
+		  if (! next_byte (&(ieee->h)))
+		    return FALSE;
+		}
 	      abfd->start_address = must_parse_int (&(ieee->h));
 	      /* We've got to the end of the data now -  */
 	      return TRUE;
@@ -1748,7 +1827,8 @@ ieee_slurp_section_data (bfd *abfd)
 	    unsigned int iterations;
 	    unsigned char *start;
 
-	    next_byte (&(ieee->h));
+	    if (! next_byte (&(ieee->h)))
+	      return FALSE;
 	    iterations = must_parse_int (&(ieee->h));
 	    start = ieee->h.input_p;
 	    if (start[0] == (int) ieee_load_constant_bytes_enum
@@ -1759,9 +1839,10 @@ ieee_slurp_section_data (bfd *abfd)
 		    location_ptr[current_map->pc++] = start[2];
 		    iterations--;
 		  }
-		next_byte (&(ieee->h));
-		next_byte (&(ieee->h));
-		next_byte (&(ieee->h));
+		(void) next_byte (&(ieee->h));
+		(void) next_byte (&(ieee->h));
+		if (! next_byte (&(ieee->h)))
+		  return FALSE;
 	      }
 	    else
 	      {
@@ -1806,6 +1887,7 @@ ieee_object_p (bfd *abfd)
     goto got_wrong_format;
 
   ieee->h.input_p = buffer;
+  ieee->h.total_amt = sizeof (buffer);
   if (this_byte_and_next (&(ieee->h)) != Module_Beginning)
     goto got_wrong_format;
 
@@ -1901,7 +1983,8 @@ ieee_object_p (bfd *abfd)
   if (this_byte (&(ieee->h)) != (int) ieee_address_descriptor_enum)
     goto fail;
 
-  next_byte (&(ieee->h));
+  if (! next_byte (&(ieee->h)))
+    goto fail;
 
   if (! parse_int (&(ieee->h), &ieee->ad.number_of_bits_mau))
     goto fail;
@@ -1912,7 +1995,10 @@ ieee_object_p (bfd *abfd)
   /* If there is a byte order info, take it.  */
   if (this_byte (&(ieee->h)) == (int) ieee_variable_L_enum
       || this_byte (&(ieee->h)) == (int) ieee_variable_M_enum)
-    next_byte (&(ieee->h));
+    {
+      if (! next_byte (&(ieee->h)))
+	goto fail;
+    }
 
   for (part = 0; part < N_W_VARIABLES; part++)
     {
@@ -1943,12 +2029,17 @@ ieee_object_p (bfd *abfd)
     goto fail;
   if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0)
     goto fail;
+
   /* FIXME: Check return value.  I'm not sure whether it needs to read
      the entire buffer or not.  */
-  bfd_bread ((void *) (IEEE_DATA (abfd)->h.first_byte),
-	    (bfd_size_type) ieee->w.r.me_record + 1, abfd);
+  amt = bfd_bread ((void *) (IEEE_DATA (abfd)->h.first_byte),
+		   (bfd_size_type) ieee->w.r.me_record + 1, abfd);
+  if (amt <= 0)
+    goto fail;
 
-  ieee_slurp_sections (abfd);
+  IEEE_DATA (abfd)->h.total_amt = amt;
+  if (ieee_slurp_sections (abfd))
+    goto fail;
 
   if (! ieee_slurp_debug (abfd))
     goto fail;