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Re: wget2 | Crash: "free(): double free detected in tcache 2" when using


From: @rockdaboot
Subject: Re: wget2 | Crash: "free(): double free detected in tcache 2" when using --load-cookies (#650)
Date: Sun, 07 Jan 2024 11:18:30 +0000



Tim Rühsen commented: 
https://gitlab.com/gnuwget/wget2/-/issues/650#note_1717194969

Thanks for the report :thumbsup: 

The bug has been fixed in c51cc7d7e2543183349b808aa68d9ecfecdb8345.

Interestingly, we have a fuzzer that should have caught this issue. I have to 
review the fuzzer code, maybe it doesn't do the expected.

Indeed, at least the fuzz corpora from OSS-Fuzz doesn't cover the code blocks 
that trigger this issue: 
https://gnuwget.gitlab.io/wget2/fuzz-coverage/builds/gnuwget/wget2/libwget/cookie.c.gcov.html
 (see the red lines in cookie_db_load()).

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