Re: [hackers] [sbase][PATCH 3/4] ed: Fix double-free in join

From: Страхиња Радић <sr_AT_strahinja.org>
Date: Sun, 23 Nov 2025 11:17:28 +0100

Дана 25/11/20 03:27PM, Santtu Lakkala написа:
> Skip calling free() on s.str in join() to avoid double-free by string()
> in next invocation.
[...]
> addchar('\0', &s);
> delete(line1, line2);
> inject(s.str, BEFORE);
> - free(s.str);
> }

Maybe instead of removing that line, do something like:

        free(s.str);
        s.str = NULL;

so the next call to free(3) will just silently return?
Received on Sun Nov 23 2025 - 11:17:28 CET