diff options
| author | Daniel MartÃn <mardani29@yahoo.es> | 2021-10-09 21:10:20 +0200 |
|---|---|---|
| committer | Lars Ingebrigtsen <larsi@gnus.org> | 2021-11-05 03:39:19 +0100 |
| commit | 48af19c1f06c2f3b20e4056bedf137a5e3c0e05e (patch) | |
| tree | 3d3823cc7cfa371718deb81e1f8e6b0fc8e4689e /lisp/emacs-lisp/comp-cstr.el | |
| parent | 3601e236792a4d3f87d17877926fea9d17c3a5a4 (diff) | |
| download | emacs-48af19c1f06c2f3b20e4056bedf137a5e3c0e05e.tar.gz emacs-48af19c1f06c2f3b20e4056bedf137a5e3c0e05e.tar.bz2 emacs-48af19c1f06c2f3b20e4056bedf137a5e3c0e05e.zip | |
Fix buffer overflow in ns_compute_glyph_string_overhangs
* src/nsterm.m (ns_compute_glyph_string_overhangs): When the first
glyph of a glyph string is a composite glyph, `s->nchars' is 0, so
"s->char2b + s->nchars - 1" dereferenced a position before buffer
`s->char2b'. Instead, rewrite part of the function to distinguish
between character glyphs and composite glyphs. For character glyphs,
calculate the font metrics using the `text_extents' function, passing
it the entire glyph string; for composite glyphs, call
`composition_gstring_width'. (Bug#51105)
Diffstat (limited to 'lisp/emacs-lisp/comp-cstr.el')
0 files changed, 0 insertions, 0 deletions