GNU bug report logs - #56095
29.0.50; nsterm.m, use after free

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Package: emacs;

Reported by: Gerd Möllmann <gerd.moellmann <at> gmail.com>

Date: Sun, 19 Jun 2022 15:18:01 UTC

Severity: normal

Found in version 29.0.50

Done: Eli Zaretskii <eliz <at> gnu.org>

Bug is archived. No further changes may be made.

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Message #23 received at 56095 <at> debbugs.gnu.org (full text, mbox):

From: Po Lu <luangruo <at> yahoo.com>
To: Gerd Möllmann <gerd.moellmann <at> gmail.com>
Cc: 56095 <at> debbugs.gnu.org
Subject: Re: bug#56095: 29.0.50; nsterm.m, use after free
Date: Mon, 20 Jun 2022 09:22:32 +0800

Gerd Möllmann <gerd.moellmann <at> gmail.com> writes:

> So, I'm trying Emacs on MacOS now, get some non-reproducible
> crashes, built master with ASAN, and the first thing it found is this:
>
> ==61522==ERROR: AddressSanitizer: heap-use-after-free on address 0x00012d7deb90 at pc 0x0001008c1514 bp 0x00016fdf7230 sp 0x00016fdf7228
> WRITE of size 8 at 0x00012d7deb90 thread T0
> ==61522==WARNING: Can't read from symbolizer at fd 25
> ==61522==WARNING: Can't read from symbolizer at fd 26
> ==61522==WARNING: Can't read from symbolizer at fd 27
> ==61522==WARNING: Can't read from symbolizer at fd 28
> ==61522==WARNING: Failed to use and restart external symbolizer!
>     #0 0x1008c1510 in wset_vertical_scroll_bar+0x4c (/Users/gerd/repos/emacs/src/emacs:arm64+0x1008c1510)
>     #1 0x1008c19a0 in -[EmacsScroller judge]+0x360 (/Users/gerd/repos/emacs/src/emacs:arm64+0x1008c19a0)
>     #2 0x1008d641c in ns_judge_scroll_bars+0x224 (/Users/gerd/repos/emacs/src/emacs:arm64+0x1008d641c)
>     #3 0x1000fa4ec in redisplay_internal+0x4ca4 (/Users/gerd/repos/emacs/src/emacs:arm64+0x1000fa4ec)
> ...

Isn't that a bug, since scroll bars should only be judged for windows
that are still reachable?
This bug report was last modified 3 years and 48 days ago.

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