Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
MIME-Version: 1.0
References: <0000000000003f654905c168b09d@google.com> <CACT4Y+Zi_femntmu0qtUz1q1gbxs-0VNrLUULzY1bd+hrBngHA@mail.gmail.com>
 <CANpmjNPAKrwrqnsJHMmZTFZwZoTCPEj_DHZ1ecgMci3Pd8JjEg@mail.gmail.com> <8ca64b7f-efd4-0d4a-3235-0b2a4755d8d6@kernel.org>
In-Reply-To: <8ca64b7f-efd4-0d4a-3235-0b2a4755d8d6@kernel.org>
From:   Marco Elver <elver@google.com>
Date:   Tue, 18 May 2021 16:41:29 +0200
Message-ID: <CANpmjNOXXt6HAYw9k-hwZvquTQW58hpbN4yzuujbwOuD3Q2p4g@mail.gmail.com>
Subject: Re: [syzbot] KFENCE: use-after-free in kmem_cache_destroy
To:     Chao Yu <chao@kernel.org>
Cc:     linux-f2fs-devel@lists.sourceforge.net,
        Dmitry Vyukov <dvyukov@google.com>, jaegeuk@kernel.org,
        LKML <linux-kernel@vger.kernel.org>,
        syzkaller-bugs <syzkaller-bugs@googlegroups.com>,
        chenyi77@huawei.com, zhuangyi1@huawei.com,
        wangxiaojun11@huawei.com, stummala@codeaurora.org,
        syzbot <syzbot+9d90dad32dd9727ed084@syzkaller.appspotmail.com>
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

On Tue, 18 May 2021 at 16:26, Chao Yu <chao@kernel.org> wrote:
> Hi Macro,
>
> I've figured out a patch for this issue.
>
> https://git.kernel.org/pub/scm/linux/kernel/git/chao/linux.git/commit/?h=dev&id=cad83c968c2ebe97905f900326988ed37146c347

Ah, nice, thank you!
I wasn't sure if there had already been a fix, so I just wanted to follow up.

#syz fix: f2fs: fix to avoid racing on fsync_entry_slab by multi
filesystem instances

Thanks,
-- Marco