linux-kernel - Re: [PATCH 1/3] fs/ntfs3: Fix insertion of attr in ni_ins_attr

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Message-ID: <20210918070246.rhbbvjwnwfnd4f7u@kari-VirtualBox>
Date:   Sat, 18 Sep 2021 10:02:46 +0300
From:   Kari Argillander <kari.argillander@...il.com>
To:     Konstantin Komarov <almaz.alexandrovich@...agon-software.com>
Cc:     ntfs3@...ts.linux.dev, linux-kernel@...r.kernel.org,
        linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH 1/3] fs/ntfs3: Fix insertion of attr in ni_ins_attr_ext

On Mon, Sep 13, 2021 at 06:12:58PM +0300, Konstantin Komarov wrote:
> Do not try to insert attribute if there is no room in record.
> 
> Signed-off-by: Konstantin Komarov <almaz.alexandrovich@...agon-software.com>

Reviewed-by: Kari Argillander <kari.argillander@...il.com>

> ---
>  fs/ntfs3/frecord.c | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/fs/ntfs3/frecord.c b/fs/ntfs3/frecord.c
> index 938b12d56ca6..834cb361f61f 100644
> --- a/fs/ntfs3/frecord.c
> +++ b/fs/ntfs3/frecord.c
> @@ -956,6 +956,13 @@ static int ni_ins_attr_ext(struct ntfs_inode *ni, struct ATTR_LIST_ENTRY *le,
>  			continue;
>  		}
>  
> +		/*
> +		 * Do not try to insert this attribute
> +		 * if there is no room in record.
> +		 */
> +		if (le32_to_cpu(mi->mrec->used) + asize > sbi->record_size)
> +			continue;
> +
>  		/* Try to insert attribute into this subrecord. */
>  		attr = ni_ins_new_attr(ni, mi, le, type, name, name_len, asize,
>  				       name_off, svcn, ins_le);
> -- 
> 2.33.0
> 
>