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Date:   Mon, 31 Jul 2023 09:46:19 +0200
From:   Miquel Raynal <miquel.raynal@bootlin.com>
To:     Richard Weinberger <richard@nod.at>
Cc:     Zheng Zhang <zheng.zhang@email.ucr.edu>,
        Vignesh Raghavendra <vigneshr@ti.com>,
        linux-mtd <linux-mtd@lists.infradead.org>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        Alexander Usyskin <alexander.usyskin@intel.com>,
        Tomas Winkler <tomas.winkler@intel.com>,
        Vitaly Lubart <vitaly.lubart@intel.com>,
        Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
        Zhang Xiaoxu <zhangxiaoxu5@huawei.com>
Subject: Re: kernel BUG in __put_mtd_device
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Hi Richard,

richard@nod.at wrote on Mon, 31 Jul 2023 07:35:15 +0200 (CEST):

> ----- Urspr=C3=BCngliche Mail -----
> > Von: "Zheng Zhang" <zheng.zhang@email.ucr.edu>
> > An: "Miquel Raynal" <miquel.raynal@bootlin.com>, "richard" <richard@nod=
.at>, "Vignesh Raghavendra" <vigneshr@ti.com>,
> > "linux-mtd" <linux-mtd@lists.infradead.org>, "linux-kernel" <linux-kern=
el@vger.kernel.org>
> > Gesendet: Montag, 31. Juli 2023 01:27:09
> > Betreff: kernel BUG in __put_mtd_device =20
>=20
> > Miquel, Richard, Vignesh  and  to whom it may concern:
> >=20
> > Hello! We have found a bug in MTD driver in the Linux kernel version 6.=
2.0
> > by Syzkaller with our own templates.
> > It's triggered for multiple times. Unfortunately, it doesn't generate a
> > reproducer.
> > Attached is the report, log generated by syzkaller.
> > Please let me know if there is any additional information that I can
> > provide to help debug this issue. =20
>=20
> Isn't this related to "[PATCH] mtd: fix use-after-free in mtd release"?

Yes, probably, we received two patches regarding the same issue, but so
far no agreement on them because none fully fixes the issue
apparently...

Thanks,
Miqu=C3=A8l