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| author | Alan Modra <amodra@gmail.com> | 2021-07-10 10:07:17 +0930 |
|---|---|---|
| committer | Alan Modra <amodra@gmail.com> | 2021-07-10 13:29:04 +0930 |
| commit | f8dd36465839e5bc60ffc5e894633d430ec55a06 (patch) | |
| tree | 7b83525498eabe5124132d2ba590a0b5c7e728e2 | |
| parent | 9039747fb4863c13eaf07f84bb28d50660fb8d85 (diff) | |
| download | gdb-f8dd36465839e5bc60ffc5e894633d430ec55a06.zip gdb-f8dd36465839e5bc60ffc5e894633d430ec55a06.tar.gz gdb-f8dd36465839e5bc60ffc5e894633d430ec55a06.tar.bz2 | |
Tidy commit 49910fd88dcd
Pointer range checking is UB if the values compared are outside the
underlying array elements (plus one).
* dwarf2.c (read_address): Remove accidental commit.
(read_ranges): Compare offset rather than pointers.
| -rw-r--r-- | bfd/ChangeLog | 5 | ||||
| -rw-r--r-- | bfd/dwarf2.c | 9 |
2 files changed, 8 insertions, 6 deletions
diff --git a/bfd/ChangeLog b/bfd/ChangeLog index 9cbb9f9..4dc3d68 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,3 +1,8 @@ +2021-07-10 Alan Modra <amodra@gmail.com> + + * dwarf2.c (read_address): Remove accidental commit. + (read_ranges): Compare offset rather than pointers. + 2021-07-08 Nick Clifton <nickc@redhat.com> * po/pt.po: Updated Portuguese translation. diff --git a/bfd/dwarf2.c b/bfd/dwarf2.c index 1247f95..04f56a7 100644 --- a/bfd/dwarf2.c +++ b/bfd/dwarf2.c @@ -909,8 +909,7 @@ read_address (struct comp_unit *unit, bfd_byte **ptr, bfd_byte *buf_end) if (bfd_get_flavour (unit->abfd) == bfd_target_elf_flavour) signed_vma = get_elf_backend_data (unit->abfd)->sign_extend_vma; - if (unit->addr_size > (size_t) (buf_end - buf) - || (buf > buf_end)) + if (unit->addr_size > (size_t) (buf_end - buf)) { *ptr = buf_end; return 0; @@ -3094,12 +3093,10 @@ read_ranges (struct comp_unit *unit, struct arange *arange, return false; } - ranges_ptr = unit->file->dwarf_ranges_buffer + offset; - if (ranges_ptr < unit->file->dwarf_ranges_buffer) + if (offset > unit->file->dwarf_ranges_size) return false; + ranges_ptr = unit->file->dwarf_ranges_buffer + offset; ranges_end = unit->file->dwarf_ranges_buffer + unit->file->dwarf_ranges_size; - if (ranges_ptr >= ranges_end) - return false; for (;;) { |