Re: [PATCH 1/7] xfs_repair: fix integer handling issues

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On Fri, May 25, 2018 at 03:11:43PM -0700, Darrick J. Wong wrote:
> From: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
> 
> When we shift sb_logblocks to the right we need to ensure that we have
Unless I'm missing something, it should be "to the left"?

Otherwise:

Reviewed-by: Carlos Maiolino <cmaiolino@xxxxxxxxxx>

> enough storage space to shift correctly.  Cast logblocks to a 64-bit
> type so that we don't screw up the check.

> 
> Coverity-id: 1435810
> Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
> ---
>  repair/sb.c |    3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> 
> diff --git a/repair/sb.c b/repair/sb.c
> index ef44e39c..543200f7 100644
> --- a/repair/sb.c
> +++ b/repair/sb.c
> @@ -313,7 +313,8 @@ verify_sb_loginfo(
>  	if (xfs_sb_version_hascrc(sb) &&
>  	    (sb->sb_logblocks == 0 ||
>  	     sb->sb_logblocks > XFS_MAX_LOG_BLOCKS ||
> -	     (sb->sb_logblocks << sb->sb_blocklog) > XFS_MAX_LOG_BYTES))
> +	     ((unsigned long long)sb->sb_logblocks << sb->sb_blocklog) >
> +	     XFS_MAX_LOG_BYTES))
>  		return false;
>  
>  	if (sb->sb_logsunit > 1 && sb->sb_logsunit % sb->sb_blocksize)
> 
> --
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-- 
Carlos
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