linux-kernel - Re: [PATCH] erofs: fix ztailpacking on

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Message-ID: <20220223165740.0000067a.zbestahu@gmail.com>
Date:   Wed, 23 Feb 2022 16:57:40 +0800
From:   Yue Hu <zbestahu@...il.com>
To:     Gao Xiang <hsiangkao@...ux.alibaba.com>
Cc:     linux-erofs@...ts.ozlabs.org, Chao Yu <chao@...nel.org>,
        Yue Hu <huyue2@...ong.com>,
        LKML <linux-kernel@...r.kernel.org>, zhangwen@...lpad.com,
        shaojunjun@...lpad.com
Subject: Re: [PATCH] erofs: fix ztailpacking on > 4GiB filesystems

On Tue, 22 Feb 2022 11:31:18 +0800
Gao Xiang <hsiangkao@...ux.alibaba.com> wrote:

> z_idataoff here is an absolute physical offset, so it should use
> erofs_off_t (64 bits at least). Otherwise, it'll get trimmed and
> cause the decompresion failure.
> 
> Fixes: ab92184ff8f1 ("erofs: add on-disk compressed tail-packing inline support")
> Signed-off-by: Gao Xiang <hsiangkao@...ux.alibaba.com>
> ---
>  fs/erofs/internal.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/erofs/internal.h b/fs/erofs/internal.h
> index b8272fb95fd6..5aa2cf2c2f80 100644
> --- a/fs/erofs/internal.h
> +++ b/fs/erofs/internal.h
> @@ -325,7 +325,7 @@ struct erofs_inode {
>  			unsigned char  z_algorithmtype[2];
>  			unsigned char  z_logical_clusterbits;
>  			unsigned long  z_tailextent_headlcn;
> -			unsigned int   z_idataoff;
> +			erofs_off_t    z_idataoff;
>  			unsigned short z_idata_size;
>  		};
>  #endif	/* CONFIG_EROFS_FS_ZIP */

Reviewed-by: Yue Hu <huyue2@...ong.com>