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| author | Alan Modra <amodra@gmail.com> | 2017-09-25 19:03:46 +0930 |
|---|---|---|
| committer | Alan Modra <amodra@gmail.com> | 2017-09-25 22:01:47 +0930 |
| commit | c361faae8d964db951b7100cada4dcdc983df1bf (patch) | |
| tree | 6e2d5afe0a661479c97a5b68bb3608b02aa62ba9 | |
| parent | 57a024f4650d7562e963efb6b00c4a4cd74185c4 (diff) | |
| download | gdb-c361faae8d964db951b7100cada4dcdc983df1bf.zip gdb-c361faae8d964db951b7100cada4dcdc983df1bf.tar.gz gdb-c361faae8d964db951b7100cada4dcdc983df1bf.tar.bz2 | |
PR22200, DWARF5 .debug_line sanity check
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.
| -rw-r--r-- | bfd/ChangeLog | 5 | ||||
| -rw-r--r-- | bfd/dwarf2.c | 7 |
2 files changed, 12 insertions, 0 deletions
diff --git a/bfd/ChangeLog b/bfd/ChangeLog index 92a6c27..adbc014 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -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 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; |