linux-kernel - Re: [PATCH] mm/folio-compact: fix potential NULL pointer in pagecache_get

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Message-ID: <YuE9qcUs9NxB14Bh@casper.infradead.org>
Date:   Wed, 27 Jul 2022 14:29:13 +0100
From:   Matthew Wilcox <willy@...radead.org>
To:     Yongqiang Liu <liuyongqiang13@...wei.com>
Cc:     dhowells@...hat.com, akpm@...ux-foundation.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, zhangxiaoxu5@...wei.com,
        yanaijie@...wei.com, vbabka@...e.cz, wangkefeng.wang@...wei.com
Subject: Re: [PATCH] mm/folio-compact: fix potential NULL pointer in
 pagecache_get_page

On Wed, Jul 27, 2022 at 06:46:21AM +0000, Yongqiang Liu wrote:
> When __filemap_get_folio() failed and returned NULL, we would
> get a NULL pointer dereference in pagecache_get_page.

No we wouldn't.