linux-kernel - Re: [syzbot] general protection fault in list_lru

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: <5818154.lOV4Wx5bFT@leap>
Date:   Fri, 25 Mar 2022 13:37:57 +0100
From:   "Fabio M. De Francesco" <fmdefrancesco@...il.com>
To:     Muchun Song <songmuchun@...edance.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     syzbot <syzbot+f8c45ccc7d5d45fc5965@...kaller.appspotmail.com>,
        syzkaller-bugs@...glegroups.com,
        Andrew Morton <akpm@...ux-foundation.org>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux-MM <linux-mm@...ck.org>,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>
Subject: Re: [syzbot] general protection fault in list_lru_add

On venerdì 25 marzo 2022 06:47:36 CET Fabio M. De Francesco wrote:
> On giovedì 24 marzo 2022 20:45:00 CET Linus Torvalds wrote:
> > On Thu, Mar 24, 2022 at 12:41 PM syzbot
> > <syzbot+f8c45ccc7d5d45fc5965@...kaller.appspotmail.com> wrote:
> > >
> > > syzbot has tested the proposed patch and the reproducer did not trigger any issue:
> > 
> > Heh, well that's unfortunate.
> > 
> > I think the issue is that it triggered a new BUG() that didn't match
> > the previous NULL pointer dereference, so it thinks things are
> > "fixed".
> > 
> >              Linus
> > 
> > -- 
> > You received this message because you are subscribed to the Google Groups "syzkaller-bugs" group.
> > To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-bugs+unsubscribe@...glegroups.com.
> > To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller-bugs/CAHk-%3DwhxaFX4nqnE-SLHTGKyqejvbrhYx5sagcxWd%2BUWCMf8dg%40mail.gmail.com.
> > 
> 
> No, not at all, Linus!
> 
> Unless I'm still sleeping with wide open eyes (it's 6.30 AM here), you are misunderstanding 
> this message from Syzbot :)

Oh sorry for the noise.

I hadn't read his changes, so I didn't know that they were a no-op patch that wasn't meant
to fix the reported issue :(

Regards,

Fabio