This is the mail archive of the
binutils@sourceware.org
mailing list for the binutils project.
PR22200, DWARF5 .debug_line sanity check
- From: Alan Modra <amodra at gmail dot com>
- To: binutils at sourceware dot org
- Date: Mon, 25 Sep 2017 22:43:50 +0930
- Subject: PR22200, DWARF5 .debug_line sanity check
- Authentication-results: sourceware.org; auth=none
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.
diff --git a/bfd/dwarf2.c b/bfd/dwarf2.c
index 1566cd8..8abb3f0 100644
--- a/bfd/dwarf2.c
+++ b/bfd/dwarf2.c
@@ -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;
--
Alan Modra
Australia Development Lab, IBM