linux-ext4 - Re: [PATCH v3] fs: forbid invalid project ID

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Date:   Tue, 6 Jul 2021 14:52:48 +0100
From:   Christoph Hellwig <hch@...radead.org>
To:     Wang Shilong <wangshilong1991@...il.com>
Cc:     linux-fsdevel@...r.kernel.org, linux-xfs@...r.kernel.org,
        linux-ext4@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net
Subject: Re: [PATCH v3] fs: forbid invalid project ID

> diff --git a/fs/ioctl.c b/fs/ioctl.c
> index 1e2204fa9963..d7edc92df473 100644
> --- a/fs/ioctl.c
> +++ b/fs/ioctl.c
> @@ -806,6 +806,8 @@ static int fileattr_set_prepare(struct inode *inode,
>  	if (err)
>  		return err;
>  
> +	if (!projid_valid(make_kprojid(&init_user_ns, fa->fsx_projid)))
> +		return -EINVAL;
>  	/*

And empty line before the comment would be nice for readability.

Otherwise looks good:

Reviewed-by: Christoph Hellwig <hch@....de>