linux-kernel - Re: [syzbot] KASAN: use-after-free Read in jbd2_journal_wait

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Date:   Wed, 9 Feb 2022 12:13:38 +0530
From:   Ritesh Harjani <riteshh@...ux.ibm.com>
To:     syzbot <syzbot+afa2ca5171d93e44b348@...kaller.appspotmail.com>
Cc:     jack@...e.com, jack@...e.cz, linux-ext4@...r.kernel.org,
        linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com,
        tytso@....edu
Subject: Re: [syzbot] KASAN: use-after-free Read in jbd2_journal_wait_updates

On 22/02/08 08:19PM, syzbot wrote:
> syzbot has found a reproducer for the following issue on:
>
> HEAD commit:    ef6b35306dd8 Add linux-next specific files for 20220204
> git tree:       linux-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=1390be28700000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=e0431e0b00810b4f
> dashboard link: https://syzkaller.appspot.com/bug?extid=afa2ca5171d93e44b348
> compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=133db2b4700000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=17beb4a4700000
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+afa2ca5171d93e44b348@...kaller.appspotmail.com
>

#syz test: https://github.com/riteshharjani/linux.git jbd2-kill-t-handle-lock