linux-kernel - Re: [PATCH v2] staging: erofs: fix unexpected out-of-bound data access

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Message-ID: <20190412135145.GK6095@kadam>
Date:   Fri, 12 Apr 2019 16:51:45 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Gao Xiang <gaoxiang25@...wei.com>
Cc:     Chao Yu <yuchao0@...wei.com>, Ming Lei <ming.lei@...hat.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        devel@...verdev.osuosl.org, linux-erofs@...ts.ozlabs.org,
        Chao Yu <chao@...nel.org>, LKML <linux-kernel@...r.kernel.org>,
        weidu.du@...wei.com, Fang Wei <fangwei1@...wei.com>,
        Miao Xie <miaoxie@...wei.com>
Subject: Re: [PATCH v2] staging: erofs: fix unexpected out-of-bound data
 access

On Fri, Apr 12, 2019 at 05:53:14PM +0800, Gao Xiang wrote:
> Unexpected out-of-bound data will be read in erofs_read_raw_page
> after commit 07173c3ec276 ("block: enable multipage bvecs") since
> one iovec could have multiple pages.
> 
> Let's fix as what Ming's pointed out in the previous email [1].
> 
> [1] https://lore.kernel.org/lkml/20190411080953.GE421@ming.t460p/
> 

Please also use the Fixes tag.

Fixes: 07173c3ec276 ("block: enable multipage bvecs")

> Suggested-by: Ming Lei <ming.lei@...hat.com>
> Reviewed-by: Chao Yu <yuchao0@...wei.com>
> Signed-off-by: Gao Xiang <gaoxiang25@...wei.com>

regards,
dan carpenter