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PR22200, DWARF5 .debug_line sanity check

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The format_count entry can't be zero unless the count is also zero.

	PR 22200
	* dwarf2.c (read_formatted_entries): Error on format_count zero.
This commit is contained in:
Alan Modra
2017-09-25 19:03:46 +09:30
parent 57a024f465
commit c361faae8d
2 changed files with 12 additions and 0 deletions
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5
bfd/ChangeLog
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@ -1,3 +1,8 @@
2017-09-25 Alan Modra <amodra@gmail.com>
PR 22200
* dwarf2.c (read_formatted_entries): Error on format_count zero.
2017-09-24 Alan Modra <amodra@gmail.com>
PR 22197

7
bfd/dwarf2.c
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@ -1933,6 +1933,13 @@ read_formatted_entries (struct comp_unit *unit, bfd_byte **bufp,
data_count = _bfd_safe_read_leb128 (abfd, buf, &bytes_read, FALSE, buf_end);
buf += bytes_read;
if (format_count == 0 && data_count != 0)
{
_bfd_error_handler (_("Dwarf Error: Zero format count."));
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
for (datai = 0; datai < data_count; datai++)
{
bfd_byte *format = format_header_data;