linux-kernel - Re: [syzbot] KFENCE: use-after-free in kmem_cache

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Message-ID: <CANpmjNOXXt6HAYw9k-hwZvquTQW58hpbN4yzuujbwOuD3Q2p4g@mail.gmail.com>
Date:   Tue, 18 May 2021 16:41:29 +0200
From:   Marco Elver <elver@...gle.com>
To:     Chao Yu <chao@...nel.org>
Cc:     linux-f2fs-devel@...ts.sourceforge.net,
        Dmitry Vyukov <dvyukov@...gle.com>, jaegeuk@...nel.org,
        LKML <linux-kernel@...r.kernel.org>,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>,
        chenyi77@...wei.com, zhuangyi1@...wei.com,
        wangxiaojun11@...wei.com, stummala@...eaurora.org,
        syzbot <syzbot+9d90dad32dd9727ed084@...kaller.appspotmail.com>
Subject: Re: [syzbot] KFENCE: use-after-free in kmem_cache_destroy

On Tue, 18 May 2021 at 16:26, Chao Yu <chao@...nel.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