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Re: readline: double free when using PageDown


From: Matthias Klose
Subject: Re: readline: double free when using PageDown
Date: Sun, 26 Nov 2023 09:06:25 +0100
User-agent: Mozilla Thunderbird

On 26.11.23 02:19, Grisha Levit wrote:
On Sat, Nov 25, 2023, 14:03 Chet Ramey <chet.ramey@case.edu> wrote:

On 11/25/23 11:41 AM, Matthias Klose wrote:
[forwarded from https://bugs.debian.org/1056314]

"""
I am getting a crash in the Python REPL in this scenario:

1. start "python3" in a terminal
2. type "2+2", enter
3. type (or copy-paste) "1234+5678", enter
4. arrow-up, remove "234", page-down, arrow-up, enter
5. arrow-up, arrow-up, add "000" (or whatever) after the 1, enter.

this results in:

free(): double free detected in tcache 2
   [1]    2319820 IOT instruction  python3

I can reproduce this in bash-5.2, but not in the devel branch.


I believe this is fixed by
https://git.savannah.gnu.org/cgit/bash.git/commit/?h=devel&id=277c21d2

thanks, I can confirm that this fixes the issue.




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