linux-kernel - Re: [PATCH] UDF: During mount free lvid_bh before rescanning with different blocksize

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Message-ID: <CAKYAXd9ssYNvprrhLHnYFfYg4Be741_gqrH4tmGUNvZntG3RCQ@mail.gmail.com>
Date:	Sun, 12 Aug 2012 13:03:54 +0900
From:	Namjae Jeon <linkinjeon@...il.com>
To:	Jan Kara <jack@...e.cz>
Cc:	linux-kernel@...r.kernel.org,
	Ashish Sangwan <ashish.sangwan2@...il.com>
Subject: Re: [PATCH] UDF: During mount free lvid_bh before rescanning with
 different blocksize

Hi. Jan.

Would you check this patch also ?

Thanks.

2012/7/21, Ashish Sangwan <ashishsangwan2@...il.com>:
> If s_lvid_bh is not freed and set to NULL before re-scanning partition
> with default block size, we might end up using wrong lvid in case
> s_lvid_bh is not updated in udf_load_logicalvolint during rescan.
>
> Signed-off-by: Ashish Sangwan <ashish.sangwan2@...il.com>
> Signed-off-by: Namjae Jeon <linkinjeon@...il.com>
>
> ---
>  fs/udf/super.c |    2 ++
>  1 files changed, 2 insertions(+), 0 deletions(-)
>
> diff --git a/fs/udf/super.c b/fs/udf/super.c
> index ac8a348..4a95c56 100644
> --- a/fs/udf/super.c
> +++ b/fs/udf/super.c
> @@ -1961,6 +1961,8 @@ static int udf_fill_super(struct super_block *sb, void
> *options, int silent)
>  			if (!silent)
>  				pr_notice("Rescanning with blocksize %d\n",
>  					  UDF_DEFAULT_BLOCKSIZE);
> +			brelse(sbi->s_lvid_bh);
> +			sbi->s_lvid_bh = NULL;
>  			uopt.blocksize = UDF_DEFAULT_BLOCKSIZE;
>  			ret = udf_load_vrs(sb, &uopt, silent, &fileset);
>  		}
> --
> 1.7.2.3
>
>
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