Re: kernel BUG in __put_mtd_device

[Miquel Raynal]

Hi Richard,

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

> ----- Ursprüngliche Mail -----
> > Von: "Zheng Zhang" <zheng.zhang@xxxxxxxxxxxxx>
> > An: "Miquel Raynal" <miquel.raynal@xxxxxxxxxxx>, "richard" <richard@xxxxxx>, "Vignesh Raghavendra" <vigneshr@xxxxxx>,
> > "linux-mtd" <linux-mtd@xxxxxxxxxxxxxxxxxxx>, "linux-kernel" <linux-kernel@xxxxxxxxxxxxxxx>
> > Gesendet: Montag, 31. Juli 2023 01:27:09
> > Betreff: kernel BUG in __put_mtd_device  
> 
> > Miquel, Richard, Vignesh  and  to whom it may concern:
> > 
> > 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.  
> 
> 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,
Miquèl