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bug#58334: 29.0.50; ASAN heap use after free in gui_produce_glyphs
From: |
Gerd Möllmann |
Subject: |
bug#58334: 29.0.50; ASAN heap use after free in gui_produce_glyphs |
Date: |
Fri, 07 Oct 2022 10:54:34 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) |
Po Lu <luangruo@yahoo.com> writes:
> Gerd Möllmann <gerd.moellmann@gmail.com> writes:
>
>> And, while vaccuming, I also wondered what happens with the glyph
>> matrices, and maybe other global state?
>
> Isn't input blocked wherever the glyph matrices are modified?
> If not,
Partly. Eli please correct me if this has changed.
Redisplay has two phases:
1. Building desired matrices, that is, what should be on the screen
after redisplay.
2. Updating current matrices from desired matrices, and bringing that on
the screen.
Only phase 2 has input blocked because the current matrices are
modified, which are shared state with the GUI code.
> how come expose_frame always works correctly?
Expose uses only current matrices.
- bug#58334: 29.0.50; ASAN heap use after free in gui_produce_glyphs, (continued)
bug#58334: 29.0.50; ASAN heap use after free in gui_produce_glyphs, Po Lu, 2022/10/06
- bug#58334: 29.0.50; ASAN heap use after free in gui_produce_glyphs, Gerd Möllmann, 2022/10/07
- bug#58334: 29.0.50; ASAN heap use after free in gui_produce_glyphs, Eli Zaretskii, 2022/10/07
- bug#58334: 29.0.50; ASAN heap use after free in gui_produce_glyphs, Gerd Möllmann, 2022/10/07
- bug#58334: 29.0.50; ASAN heap use after free in gui_produce_glyphs, Gerd Möllmann, 2022/10/07
- bug#58334: 29.0.50; ASAN heap use after free in gui_produce_glyphs, Po Lu, 2022/10/07
- bug#58334: 29.0.50; ASAN heap use after free in gui_produce_glyphs,
Gerd Möllmann <=
- bug#58334: 29.0.50; ASAN heap use after free in gui_produce_glyphs, Po Lu, 2022/10/07
- bug#58334: 29.0.50; ASAN heap use after free in gui_produce_glyphs, Gerd Möllmann, 2022/10/07
- bug#58334: 29.0.50; ASAN heap use after free in gui_produce_glyphs, Po Lu, 2022/10/07
- bug#58334: 29.0.50; ASAN heap use after free in gui_produce_glyphs, Eli Zaretskii, 2022/10/07
- bug#58334: 29.0.50; ASAN heap use after free in gui_produce_glyphs, Gerd Möllmann, 2022/10/07
bug#58334: 29.0.50; ASAN heap use after free in gui_produce_glyphs, Eli Zaretskii, 2022/10/07
bug#58334: 29.0.50; ASAN heap use after free in gui_produce_glyphs, Po Lu, 2022/10/07
bug#58334: 29.0.50; ASAN heap use after free in gui_produce_glyphs, Eli Zaretskii, 2022/10/07
bug#58334: 29.0.50; ASAN heap use after free in gui_produce_glyphs, Eli Zaretskii, 2022/10/07
bug#58334: 29.0.50; ASAN heap use after free in gui_produce_glyphs, Gerd Möllmann, 2022/10/07