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bug#58042: 29.0.50; ASAN use-after-free in re_match_2_internal
From: |
Gerd Möllmann |
Subject: |
bug#58042: 29.0.50; ASAN use-after-free in re_match_2_internal |
Date: |
Mon, 26 Sep 2022 07:13:05 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (darwin) |
Eli Zaretskii <eliz@gnu.org> writes:
>> From: Gerd Möllmann <gerd.moellmann@gmail.com>
>> Cc: 58042@debbugs.gnu.org
>> Date: Sun, 25 Sep 2022 10:28:48 +0200
>>
>> So, the question seems to be what scenario would create a live string
>> that points into a freed sdata struct.
>
> That sounds highly improbable to me. But stranger things have
> happened...
Yeah :-/.
In the meantime, and in an attempt to get some more information, I've
made me a script that starts Emacs in LLDB, with my init file, and exits
Emacs after a delay, and then does things in LLDB depending on what
happened.
I left that script running over night, and the result wasn't very
helpful. After almost 2 hours of running, I got an ASAN error in
copyRect:(NSRect)srcRect to:(NSPoint)dest, nsterm.m. And LLDB crashed
again.
This is with HEAD 568920a5b703e80c43e1b6f31778ea5776218a1e.
I meanwhile wonder what that all means. An "invalid display" that isn't
reproducible, a crash in regexp, a crash in copyRect, and then the
crashes in LLDB itself.
I think I'll let that sit for a bit.
- bug#58042: 29.0.50; ASAN use-after-free in re_match_2_internal, (continued)
- bug#58042: 29.0.50; ASAN use-after-free in re_match_2_internal, Gerd Möllmann, 2022/09/24
- bug#58042: 29.0.50; ASAN use-after-free in re_match_2_internal, Eli Zaretskii, 2022/09/24
- bug#58042: 29.0.50; ASAN use-after-free in re_match_2_internal, Gerd Möllmann, 2022/09/24
- bug#58042: 29.0.50; ASAN use-after-free in re_match_2_internal, Eli Zaretskii, 2022/09/24
- bug#58042: 29.0.50; ASAN use-after-free in re_match_2_internal, Gerd Möllmann, 2022/09/25
- bug#58042: 29.0.50; ASAN use-after-free in re_match_2_internal, Eli Zaretskii, 2022/09/25
- bug#58042: 29.0.50; ASAN use-after-free in re_match_2_internal, Gerd Möllmann, 2022/09/25
- bug#58042: 29.0.50; ASAN use-after-free in re_match_2_internal, Eli Zaretskii, 2022/09/25
- bug#58042: 29.0.50; ASAN use-after-free in re_match_2_internal, Gerd Möllmann, 2022/09/25
- bug#58042: 29.0.50; ASAN use-after-free in re_match_2_internal, Eli Zaretskii, 2022/09/25
- bug#58042: 29.0.50; ASAN use-after-free in re_match_2_internal,
Gerd Möllmann <=