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

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Message-ID: <CAHk-=whxaFX4nqnE-SLHTGKyqejvbrhYx5sagcxWd+UWCMf8dg@mail.gmail.com>
Date:   Thu, 24 Mar 2022 12:45:00 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     syzbot <syzbot+f8c45ccc7d5d45fc5965@...kaller.appspotmail.com>
Cc:     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>,
        Muchun Song <songmuchun@...edance.com>,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>
Subject: Re: [syzbot] general protection fault in list_lru_add

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