linux-kernel - Re: [syzbot] [bpf?] WARNING: locking bug in trie_delete

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <87bjylnq8j.ffs@tglx>
Date: Tue, 12 Nov 2024 03:24:44 +0100
From: Thomas Gleixner <tglx@...utronix.de>
To: syzbot <syzbot+b506de56cbbb63148c33@...kaller.appspotmail.com>,
 andrii@...nel.org, ast@...nel.org, bpf@...r.kernel.org,
 daniel@...earbox.net, eddyz87@...il.com, frederic@...nel.org,
 haoluo@...gle.com, houtao@...weicloud.com, john.fastabend@...il.com,
 jolsa@...nel.org, kpsingh@...nel.org, linux-kernel@...r.kernel.org,
 martin.lau@...ux.dev, peterz@...radead.org, sdf@...ichev.me,
 song@...nel.org, syzkaller-bugs@...glegroups.com, yonghong.song@...ux.dev
Subject: Re: [syzbot] [bpf?] WARNING: locking bug in trie_delete_elem

On Thu, Nov 07 2024 at 13:00, syzbot wrote:
> syzbot has bisected this issue to:
>
> commit 4febce44cfebcb490b196d5d10ae9f403ca4c956
> Author: Thomas Gleixner <tglx@...utronix.de>
> Date:   Tue Oct 1 08:42:03 2024 +0000
>
>     posix-timers: Cure si_sys_private race
>
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=129f2d87980000
> start commit:   f9f24ca362a4 Add linux-next specific files for 20241031
> git tree:       linux-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=169f2d87980000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=328572ed4d152be9
> dashboard link: https://syzkaller.appspot.com/bug?extid=b506de56cbbb63148c33
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1387655f980000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=11ac5540580000
>
> Reported-by: syzbot+b506de56cbbb63148c33@...kaller.appspotmail.com
> Fixes: 4febce44cfeb ("posix-timers: Cure si_sys_private race")
>
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection

I seriously doubt that this bisection is even remotely correct.

This commit has absolutely nothing to do with the lockdep splat and
trie_delete_elem().

Thanks,

        tglx