Re: [PATCH] ubifs : fix oops when remounting with no_bulk_read.

From	Richard Weinberger <richard@nod.at>
Newsgroups	linux.kernel
Subject	Re: [PATCH] ubifs : fix oops when remounting with no_bulk_read.
Date	2017-06-14 18:10 +0200
Message-ID	<tSj1M-7nv-5@gated-at.bofh.it> (permalink)
References	<tRmEp-45C-9@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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karam.lee,

Am 12.06.2017 um 03:46 schrieb karam.lee@lge.com:
> From: "karam.lee" <karam.lee@lge.com>
> 
> When remounting with the no_bulk_read option,
> there is a problem accessing the "bulk_read buffer(bu.buf)"
> which has already been freed.
> 
> If the bulk_read option is enabled,
> ubifs_tnc_bulk_read uses the pre-allocated bu.buf.
> 
> While bu.buf is being used by ubifs_tnc_bulk_read,
> remounting with no_bulk_read frees bu.buf.
> 
> So I added code to check the use of "bu.buf" to avoid this situation.

Agreed. We need to lock the buffer in this situation.
Thanks for fixing this.

Thanks,
//richard

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[PATCH] ubifs : fix oops when remounting with no_bulk_read. karam.lee@lge.com - 2017-06-12 03:50 +0200
  Re: [PATCH] ubifs : fix oops when remounting with no_bulk_read. Richard Weinberger <richard@nod.at> - 2017-06-14 18:10 +0200

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