linux-kernel - Re: [PATCH v10 02/12] mm: apply_to_pte_range warn and fail if a large pte is encountered

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Message-ID: <20210124113233.GB694255@infradead.org>
Date:   Sun, 24 Jan 2021 11:32:33 +0000
From:   Christoph Hellwig <hch@...radead.org>
To:     Nicholas Piggin <npiggin@...il.com>
Cc:     linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>,
        linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, Zefan Li <lizefan@...wei.com>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        Christoph Hellwig <hch@...radead.org>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Rick Edgecombe <rick.p.edgecombe@...el.com>,
        Ding Tianhong <dingtianhong@...wei.com>
Subject: Re: [PATCH v10 02/12] mm: apply_to_pte_range warn and fail if a
 large pte is encountered

On Sun, Jan 24, 2021 at 06:22:20PM +1000, Nicholas Piggin wrote:
> apply_to_pte_range might mistake a large pte for bad, or treat it as a
> page table, resulting in a crash or corruption. Add a test to warn and
> return error if large entries are found.

Looks good,

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