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| author | Nick Clifton <nickc@redhat.com> | 2017-09-01 11:20:51 +0100 |
|---|---|---|
| committer | Nick Clifton <nickc@redhat.com> | 2017-09-01 11:20:51 +0100 |
| commit | 7e8b60085eb3e6f2c41bc0c00c0d759fa7f72780 (patch) | |
| tree | 5375adc59b856bd69905d8eae6f7c92161150d79 | |
| parent | f8ad2513754f5a53fecb407cf64fcb586836b60c (diff) | |
| download | gdb-7e8b60085eb3e6f2c41bc0c00c0d759fa7f72780.zip gdb-7e8b60085eb3e6f2c41bc0c00c0d759fa7f72780.tar.gz gdb-7e8b60085eb3e6f2c41bc0c00c0d759fa7f72780.tar.bz2 | |
Prevent an address violation parsing corrupt DWARF information by fixing the test for an overlong debug line info structure.
PR 22059
* dwarf2.c (decode_line_info): Fix test for an overlong line info
structure.
| -rw-r--r-- | bfd/ChangeLog | 6 | ||||
| -rw-r--r-- | bfd/dwarf2.c | 6 |
2 files changed, 9 insertions, 3 deletions
diff --git a/bfd/ChangeLog b/bfd/ChangeLog index e0dd88f..8c6e8b1 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,5 +1,11 @@ 2017-09-01 Nick Clifton <nickc@redhat.com> + PR 22059 + * dwarf2.c (decode_line_info): Fix test for an overlong line info + structure. + +2017-09-01 Nick Clifton <nickc@redhat.com> + PR 22058 * elf-attrs.c (_bfd_elf_parse_attributes): Ensure that the attribute buffer is NUL terminated. diff --git a/bfd/dwarf2.c b/bfd/dwarf2.c index 40a187a..856c963 100644 --- a/bfd/dwarf2.c +++ b/bfd/dwarf2.c @@ -2096,12 +2096,12 @@ decode_line_info (struct comp_unit *unit, struct dwarf2_debug *stash) offset_size = 8; } - if (lh.total_length > stash->dwarf_line_size) + if (unit->line_offset + lh.total_length > stash->dwarf_line_size) { _bfd_error_handler /* xgettext: c-format */ - (_("Dwarf Error: Line info data is bigger (%#Lx) than the section (%#Lx)"), - lh.total_length, stash->dwarf_line_size); + (_("Dwarf Error: Line info data is bigger (%#Lx) than the space remaining in the section (%#Lx)"), + lh.total_length, stash->dwarf_line_size - unit->line_offset); bfd_set_error (bfd_error_bad_value); return NULL; } |