Re: [PATCH] xfs: fix error gotos in xfs_setattr_nonsize

[Brian Foster <bfoster@redhat.com>]

On Thu, Aug 27, 2015 at 04:27:22PM -0500, Eric Sandeen wrote:
> As the code stands today, if xfs_trans_reserve() fails, we
> goto out_dqrele, which does not free the allocated transaction.
> 
> Fix up the goto targets to undo everything properly.
> 
> Addresses-Coverity-Id: 145571
> Signed-off-by: Eric Sandeen <sandeen@redhat.com>
> ---

Reviewed-by: Brian Foster <bfoster@redhat.com>

> 
> Full disclosure: build tested only, as these are error paths
> which we don't easily fail...
> 
> diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
> index 766b23f..8294132 100644
> --- a/fs/xfs/xfs_iops.c
> +++ b/fs/xfs/xfs_iops.c
> @@ -609,7 +609,7 @@ xfs_setattr_nonsize(
>  	tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
>  	error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
>  	if (error)
> -		goto out_dqrele;
> +		goto out_trans_cancel;
>  
>  	xfs_ilock(ip, XFS_ILOCK_EXCL);
>  
> @@ -640,7 +640,7 @@ xfs_setattr_nonsize(
>  						NULL, capable(CAP_FOWNER) ?
>  						XFS_QMOPT_FORCE_RES : 0);
>  			if (error)	/* out of quota */
> -				goto out_trans_cancel;
> +				goto out_unlock;
>  		}
>  	}
>  
> @@ -729,10 +729,10 @@ xfs_setattr_nonsize(
>  
>  	return 0;
>  
> +out_unlock:
> +	xfs_iunlock(ip, XFS_ILOCK_EXCL);
>  out_trans_cancel:
>  	xfs_trans_cancel(tp);
> -	xfs_iunlock(ip, XFS_ILOCK_EXCL);
> -out_dqrele:
>  	xfs_qm_dqrele(udqp);
>  	xfs_qm_dqrele(gdqp);
>  	return error;
> 
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> xfs@oss.sgi.com
> http://oss.sgi.com/mailman/listinfo/xfs

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