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From: Zhihao Cheng <chengzhihao1@huawei.com>
To: Chenyuan Yang <chenyuan0y@gmail.com>,
	<linux-mtd@lists.infradead.org>, <richard@nod.at>,
	<miquel.raynal@bootlin.com>, <vigneshr@ti.com>
Cc: <linux-kernel@vger.kernel.org>, <syzkaller@googlegroups.com>,
	Zijie Zhao <zzjas98@gmail.com>
Subject: Re: [Linux Kernel Bug] memory leak in ubi_attach
Date: Tue, 23 Jan 2024 12:55:19 +0800	[thread overview]
Message-ID: <10779b09-3413-6374-b4a1-1efd8821c5f2@huawei.com> (raw)
In-Reply-To: <CALGdzuo8_EXr4aUAw6X9S+yzMPi25Y82netPLWsd+3n-Ov9Pnw@mail.gmail.com>

在 2024/1/23 11:53, Chenyuan Yang 写道:
> Dear Linux Kernel Developers for UBI,
> 
> We encountered "memory leak in ubi_attach" when testing UBI with
> Syzkaller and our generated specifications.
> 
> syz repro: https://drive.google.com/file/d/17FoGw6akfufz05U-oRBP2wXmOiFF1VUq/view?usp=drive_link
> C reproducer: https://drive.google.com/file/d/1ayd3lmHPvqNoI01pQEdU832EktpTUnZ_/view?usp=drive_link
> report: https://drive.google.com/file/d/1hC2arY3FbQt-6L5rbDfY-DQ2oH82IIGq/view?usp=drive_link
> stats: https://drive.google.com/file/d/1REig9fV0H1fYPWaiicc-JVLlCpo7TTw4/view?usp=drive_link

I can't open above links in company, may you post these files in attachment?

> 
> This memory leak is triggered by `ioctl$UBI_IOCATT`, where
> `ubi_attach_info` invokes `kmem_cache_create`
> (https://elixir.bootlin.com/linux/v6.7/source/drivers/mtd/ubi/attach.c#L1464).
> It seems that the memory leak occurs when the slab cache is
> successfully created. I apologize for not being able to conduct a
> deeper analysis of the root cause, as my expertise in UBI drivers is
> limited.
> 
> If you have any questions or require more information, please feel
> free to contact us.
> 
> Reported-by: Chenyuan Yang <chenyuan0y@gmail.com>
> 
> Best,
> Chenyuan
> 
> 
> ______________________________________________________
> Linux MTD discussion mailing list
> http://lists.infradead.org/mailman/listinfo/linux-mtd/
> 


  reply	other threads:[~2024-01-23  4:55 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-01-23  3:53 Chenyuan Yang
2024-01-23  4:55 ` Zhihao Cheng [this message]
     [not found]   ` <CALGdzuryBbCqGAhox9ZWaQHD5dSQNApfGmCP+rYZ7O4MCRH+rw@mail.gmail.com>
2024-01-24 12:44     ` Zhihao Cheng
2024-01-24 14:41       ` Chenyuan Yang
2024-01-29 11:51         ` Zhihao Cheng
2024-10-11  1:23           ` Chenyuan Yang
2024-10-11  5:35             ` Greg KH
2024-10-15  3:41             ` Ryder Wang
2024-10-15  6:54               ` gregkh
     [not found] <PH0PR11MB7496D8FBFAC72061A9C5F07CD1242@PH0PR11MB7496.namprd11.prod.outlook.com>
2024-11-15 14:11 ` syzbot

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